./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum.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 e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:48:35,583 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:48:35,672 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:48:35,677 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:48:35,677 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:48:35,719 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:48:35,720 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:48:35,720 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:48:35,721 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:48:35,721 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:48:35,721 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:48:35,722 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:48:35,722 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:48:35,723 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:48:35,723 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:48:35,725 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:48:35,726 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:48:35,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:48:35,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:48:35,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:48:35,729 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:48:35,730 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:48:35,731 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:48:35,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:48:35,731 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:48:35,732 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:48:35,732 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:48:35,732 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:48:35,732 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:48:35,733 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:48:35,733 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:48:35,734 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:48:35,734 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:48:35,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:48:35,735 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:48:35,735 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:48:35,736 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:48:35,736 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:48:35,736 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:48:35,736 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:48:35,737 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:48:35,737 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:48:35,738 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 [2024-11-22 21:48:35,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:48:36,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:48:36,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:48:36,024 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:48:36,024 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:48:36,025 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-22 21:48:37,515 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:48:37,681 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:48:37,681 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-22 21:48:37,688 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7b4a25b/08598a18bd42424d91a378d17931709d/FLAGa40a0c2d4 [2024-11-22 21:48:37,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7b4a25b/08598a18bd42424d91a378d17931709d [2024-11-22 21:48:37,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:48:37,706 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:48:37,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:48:37,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:48:37,716 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:48:37,717 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:37,718 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64ca7f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37, skipping insertion in model container [2024-11-22 21:48:37,718 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:37,751 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:48:37,943 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:48:37,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:48:37,957 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:48:37,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:48:37,998 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:48:37,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37 WrapperNode [2024-11-22 21:48:37,998 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:48:38,002 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:48:38,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:48:38,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:48:38,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,047 INFO L138 Inliner]: procedures = 22, calls = 32, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 266 [2024-11-22 21:48:38,047 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:48:38,048 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:48:38,048 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:48:38,048 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:48:38,058 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,063 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,083 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-22 21:48:38,084 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,084 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,094 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,101 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,105 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,107 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:48:38,119 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:48:38,119 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:48:38,119 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:48:38,120 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (1/1) ... [2024-11-22 21:48:38,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:48:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:38,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:48:38,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:48:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:48:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:48:38,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:48:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:48:38,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:48:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:48:38,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:48:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:48:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:48:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:48:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:48:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:48:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:48:38,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:48:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:48:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:48:38,199 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:48:38,298 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:48:38,300 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:48:38,841 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:48:38,841 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:48:39,169 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:48:39,169 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-22 21:48:39,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:48:39 BoogieIcfgContainer [2024-11-22 21:48:39,170 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:48:39,172 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:48:39,172 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:48:39,175 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:48:39,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:48:37" (1/3) ... [2024-11-22 21:48:39,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f22eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:48:39, skipping insertion in model container [2024-11-22 21:48:39,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:37" (2/3) ... [2024-11-22 21:48:39,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f22eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:48:39, skipping insertion in model container [2024-11-22 21:48:39,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:48:39" (3/3) ... [2024-11-22 21:48:39,181 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2024-11-22 21:48:39,200 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:48:39,201 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-22 21:48:39,201 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:48:39,265 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:48:39,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 59 transitions, 139 flow [2024-11-22 21:48:39,326 INFO L124 PetriNetUnfolderBase]: 5/56 cut-off events. [2024-11-22 21:48:39,327 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:48:39,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 5/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2024-11-22 21:48:39,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 59 transitions, 139 flow [2024-11-22 21:48:39,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 55 transitions, 128 flow [2024-11-22 21:48:39,344 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:48:39,351 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;@30a95d04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:48:39,352 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-22 21:48:39,358 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:48:39,358 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:48:39,358 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:48:39,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:39,359 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:48:39,360 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:39,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:39,369 INFO L85 PathProgramCache]: Analyzing trace with hash 894442, now seen corresponding path program 1 times [2024-11-22 21:48:39,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:39,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039529643] [2024-11-22 21:48:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:39,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:39,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:39,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039529643] [2024-11-22 21:48:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039529643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:39,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:39,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:48:39,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941955561] [2024-11-22 21:48:39,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:39,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:48:39,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:39,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:48:39,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:48:39,770 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-22 21:48:39,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:39,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:39,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-22 21:48:39,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:39,963 INFO L124 PetriNetUnfolderBase]: 333/711 cut-off events. [2024-11-22 21:48:39,964 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-22 21:48:39,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1255 conditions, 711 events. 333/711 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3933 event pairs, 226 based on Foata normal form. 1/591 useless extension candidates. Maximal degree in co-relation 1092. Up to 481 conditions per place. [2024-11-22 21:48:39,973 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 26 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-22 21:48:39,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 176 flow [2024-11-22 21:48:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:48:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:48:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-22 21:48:39,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.632768361581921 [2024-11-22 21:48:39,986 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 128 flow. Second operand 3 states and 112 transitions. [2024-11-22 21:48:39,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 176 flow [2024-11-22 21:48:39,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:48:39,992 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 112 flow [2024-11-22 21:48:39,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=52, PETRI_TRANSITIONS=51} [2024-11-22 21:48:40,001 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-22 21:48:40,001 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 112 flow [2024-11-22 21:48:40,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:40,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:40,002 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:48:40,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:48:40,002 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:40,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash 894443, now seen corresponding path program 1 times [2024-11-22 21:48:40,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:40,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094793862] [2024-11-22 21:48:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:40,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:40,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:40,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094793862] [2024-11-22 21:48:40,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094793862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:40,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:40,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:48:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052879296] [2024-11-22 21:48:40,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:40,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:48:40,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:40,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:48:40,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:48:40,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-22 21:48:40,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:40,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:40,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-22 21:48:40,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:40,606 INFO L124 PetriNetUnfolderBase]: 333/710 cut-off events. [2024-11-22 21:48:40,606 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-22 21:48:40,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 710 events. 333/710 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3932 event pairs, 226 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1197. Up to 485 conditions per place. [2024-11-22 21:48:40,613 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 25 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-22 21:48:40,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 168 flow [2024-11-22 21:48:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:48:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:48:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-22 21:48:40,616 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5847457627118644 [2024-11-22 21:48:40,616 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 112 flow. Second operand 4 states and 138 transitions. [2024-11-22 21:48:40,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 168 flow [2024-11-22 21:48:40,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:40,619 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 114 flow [2024-11-22 21:48:40,619 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-22 21:48:40,620 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-22 21:48:40,620 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 114 flow [2024-11-22 21:48:40,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:40,620 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:40,621 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:48:40,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:48:40,621 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:40,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash 27730020, now seen corresponding path program 1 times [2024-11-22 21:48:40,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:40,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116907416] [2024-11-22 21:48:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:40,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:40,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:40,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116907416] [2024-11-22 21:48:40,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116907416] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:40,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:40,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:48:40,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001450608] [2024-11-22 21:48:40,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:40,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:48:40,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:40,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:48:40,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:48:40,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2024-11-22 21:48:40,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:40,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:40,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2024-11-22 21:48:40,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:40,939 INFO L124 PetriNetUnfolderBase]: 333/716 cut-off events. [2024-11-22 21:48:40,939 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-22 21:48:40,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 716 events. 333/716 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3935 event pairs, 226 based on Foata normal form. 1/595 useless extension candidates. Maximal degree in co-relation 1209. Up to 487 conditions per place. [2024-11-22 21:48:40,945 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 28 selfloop transitions, 4 changer transitions 1/55 dead transitions. [2024-11-22 21:48:40,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 196 flow [2024-11-22 21:48:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:48:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:48:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-22 21:48:40,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6440677966101694 [2024-11-22 21:48:40,948 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 114 flow. Second operand 4 states and 152 transitions. [2024-11-22 21:48:40,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 196 flow [2024-11-22 21:48:40,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:48:40,951 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 132 flow [2024-11-22 21:48:40,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-11-22 21:48:40,952 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2024-11-22 21:48:40,952 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 132 flow [2024-11-22 21:48:40,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:40,952 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:40,952 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:48:40,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 21:48:40,953 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:40,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash 877435966, now seen corresponding path program 1 times [2024-11-22 21:48:40,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:40,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20919488] [2024-11-22 21:48:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:41,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:41,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20919488] [2024-11-22 21:48:41,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20919488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210552678] [2024-11-22 21:48:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:41,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:41,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:41,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:48:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:41,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 21:48:41,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:41,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:48:41,513 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:48:41,514 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 32 treesize of output 27 [2024-11-22 21:48:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:41,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:41,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210552678] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:41,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:48:41,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-22 21:48:41,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14434377] [2024-11-22 21:48:41,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:41,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:48:41,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:48:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:48:41,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-22 21:48:41,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:41,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:41,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-22 21:48:41,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:41,893 INFO L124 PetriNetUnfolderBase]: 333/714 cut-off events. [2024-11-22 21:48:41,894 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-22 21:48:41,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 714 events. 333/714 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3932 event pairs, 226 based on Foata normal form. 1/596 useless extension candidates. Maximal degree in co-relation 1209. Up to 487 conditions per place. [2024-11-22 21:48:41,901 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 29 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-11-22 21:48:41,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 204 flow [2024-11-22 21:48:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:48:41,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:48:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-11-22 21:48:41,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5728813559322034 [2024-11-22 21:48:41,904 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 132 flow. Second operand 5 states and 169 transitions. [2024-11-22 21:48:41,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 204 flow [2024-11-22 21:48:41,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 194 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:41,909 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 136 flow [2024-11-22 21:48:41,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-11-22 21:48:41,910 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2024-11-22 21:48:41,910 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 136 flow [2024-11-22 21:48:41,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:41,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:41,911 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:41,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:48:42,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:42,115 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:42,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1402402505, now seen corresponding path program 1 times [2024-11-22 21:48:42,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:42,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340162834] [2024-11-22 21:48:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:42,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:42,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340162834] [2024-11-22 21:48:42,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340162834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:42,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922004305] [2024-11-22 21:48:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:42,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:42,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:42,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:42,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:48:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:42,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:48:42,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:42,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:42,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922004305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:42,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:42,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-22 21:48:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372398281] [2024-11-22 21:48:42,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:42,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:48:42,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:42,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:48:42,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:48:42,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2024-11-22 21:48:42,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 136 flow. Second operand has 13 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:42,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:42,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2024-11-22 21:48:42,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:42,841 INFO L124 PetriNetUnfolderBase]: 665/1426 cut-off events. [2024-11-22 21:48:42,842 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-22 21:48:42,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 1426 events. 665/1426 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8973 event pairs, 452 based on Foata normal form. 1/1204 useless extension candidates. Maximal degree in co-relation 1217. Up to 485 conditions per place. [2024-11-22 21:48:42,852 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 48 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-11-22 21:48:42,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 348 flow [2024-11-22 21:48:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:48:42,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:48:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 295 transitions. [2024-11-22 21:48:42,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-22 21:48:42,854 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 136 flow. Second operand 8 states and 295 transitions. [2024-11-22 21:48:42,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 348 flow [2024-11-22 21:48:42,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:42,857 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 209 flow [2024-11-22 21:48:42,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-11-22 21:48:42,858 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-11-22 21:48:42,858 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 209 flow [2024-11-22 21:48:42,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:42,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:42,859 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-22 21:48:42,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:43,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:43,064 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:43,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:43,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2097608099, now seen corresponding path program 2 times [2024-11-22 21:48:43,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:43,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93986161] [2024-11-22 21:48:43,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:43,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:43,108 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:43,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:48:43,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:43,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93986161] [2024-11-22 21:48:43,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93986161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:43,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781331154] [2024-11-22 21:48:43,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:43,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:43,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:43,363 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:43,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:48:43,439 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:43,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:43,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 21:48:43,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:43,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:48:43,606 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:48:43,607 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 32 treesize of output 27 [2024-11-22 21:48:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:43,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:43,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781331154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:43,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:43,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2024-11-22 21:48:43,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823512652] [2024-11-22 21:48:43,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:43,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:48:43,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:48:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:48:44,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-22 21:48:44,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 209 flow. Second operand has 16 states, 16 states have (on average 28.75) internal successors, (460), 16 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:44,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:44,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-22 21:48:44,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:45,439 INFO L124 PetriNetUnfolderBase]: 995/2126 cut-off events. [2024-11-22 21:48:45,439 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-22 21:48:45,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3683 conditions, 2126 events. 995/2126 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14710 event pairs, 678 based on Foata normal form. 2/1795 useless extension candidates. Maximal degree in co-relation 2418. Up to 960 conditions per place. [2024-11-22 21:48:45,454 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 44 selfloop transitions, 18 changer transitions 0/83 dead transitions. [2024-11-22 21:48:45,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 393 flow [2024-11-22 21:48:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:48:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:48:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 361 transitions. [2024-11-22 21:48:45,457 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5562403697996918 [2024-11-22 21:48:45,457 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 209 flow. Second operand 11 states and 361 transitions. [2024-11-22 21:48:45,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 393 flow [2024-11-22 21:48:45,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 369 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:45,460 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 233 flow [2024-11-22 21:48:45,460 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=233, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-11-22 21:48:45,461 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2024-11-22 21:48:45,461 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 233 flow [2024-11-22 21:48:45,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 28.75) internal successors, (460), 16 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:45,462 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:45,462 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:45,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:48:45,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:45,663 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:45,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1830191831, now seen corresponding path program 1 times [2024-11-22 21:48:45,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:45,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072504497] [2024-11-22 21:48:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:45,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:45,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:45,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072504497] [2024-11-22 21:48:45,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072504497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:45,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384590773] [2024-11-22 21:48:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:45,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:45,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:45,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:45,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:48:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:45,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-22 21:48:45,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:45,944 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 [2024-11-22 21:48:45,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:48:46,001 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:48:46,001 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 [2024-11-22 21:48:46,030 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 31 treesize of output 24 [2024-11-22 21:48:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:46,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:46,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384590773] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:46,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:48:46,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-22 21:48:46,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230584005] [2024-11-22 21:48:46,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:46,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:48:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:46,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:48:46,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:46,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-22 21:48:46,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:46,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:46,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-22 21:48:46,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:47,236 INFO L124 PetriNetUnfolderBase]: 2003/4076 cut-off events. [2024-11-22 21:48:47,237 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-22 21:48:47,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7074 conditions, 4076 events. 2003/4076 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31516 event pairs, 789 based on Foata normal form. 0/3454 useless extension candidates. Maximal degree in co-relation 4674. Up to 1860 conditions per place. [2024-11-22 21:48:47,270 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 46 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-11-22 21:48:47,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 389 flow [2024-11-22 21:48:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:48:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:48:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2024-11-22 21:48:47,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5738498789346247 [2024-11-22 21:48:47,272 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 233 flow. Second operand 7 states and 237 transitions. [2024-11-22 21:48:47,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 389 flow [2024-11-22 21:48:47,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 353 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-22 21:48:47,276 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 242 flow [2024-11-22 21:48:47,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2024-11-22 21:48:47,277 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 13 predicate places. [2024-11-22 21:48:47,277 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 242 flow [2024-11-22 21:48:47,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:47,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:47,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:47,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:48:47,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:47,482 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:47,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:47,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1830191830, now seen corresponding path program 1 times [2024-11-22 21:48:47,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:47,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633534293] [2024-11-22 21:48:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:47,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:47,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633534293] [2024-11-22 21:48:47,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633534293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:47,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:47,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:48:47,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471647536] [2024-11-22 21:48:47,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:47,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:48:47,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:47,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:48:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:48:47,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 59 [2024-11-22 21:48:47,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:47,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:47,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 59 [2024-11-22 21:48:47,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:48,148 INFO L124 PetriNetUnfolderBase]: 2561/4601 cut-off events. [2024-11-22 21:48:48,148 INFO L125 PetriNetUnfolderBase]: For 2820/3042 co-relation queries the response was YES. [2024-11-22 21:48:48,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10254 conditions, 4601 events. 2561/4601 cut-off events. For 2820/3042 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 31182 event pairs, 1824 based on Foata normal form. 369/4805 useless extension candidates. Maximal degree in co-relation 3418. Up to 3588 conditions per place. [2024-11-22 21:48:48,192 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 39 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2024-11-22 21:48:48,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 60 transitions, 326 flow [2024-11-22 21:48:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:48:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:48:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-11-22 21:48:48,194 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4711864406779661 [2024-11-22 21:48:48,194 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 242 flow. Second operand 5 states and 139 transitions. [2024-11-22 21:48:48,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 60 transitions, 326 flow [2024-11-22 21:48:48,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 60 transitions, 318 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:48:48,199 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 240 flow [2024-11-22 21:48:48,200 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2024-11-22 21:48:48,201 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2024-11-22 21:48:48,201 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 240 flow [2024-11-22 21:48:48,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:48,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:48,202 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:48,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:48:48,202 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:48,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash 901372759, now seen corresponding path program 1 times [2024-11-22 21:48:48,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:48,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418037534] [2024-11-22 21:48:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:48,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:48,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:48,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418037534] [2024-11-22 21:48:48,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418037534] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:48,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:48,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:48:48,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991873863] [2024-11-22 21:48:48,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:48,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:48:48,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:48,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:48:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:48:48,278 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-11-22 21:48:48,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:48,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:48,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-11-22 21:48:48,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:48,540 INFO L124 PetriNetUnfolderBase]: 1295/2516 cut-off events. [2024-11-22 21:48:48,541 INFO L125 PetriNetUnfolderBase]: For 1699/2032 co-relation queries the response was YES. [2024-11-22 21:48:48,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5418 conditions, 2516 events. 1295/2516 cut-off events. For 1699/2032 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17016 event pairs, 918 based on Foata normal form. 117/2432 useless extension candidates. Maximal degree in co-relation 1806. Up to 1860 conditions per place. [2024-11-22 21:48:48,561 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 37 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-11-22 21:48:48,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 316 flow [2024-11-22 21:48:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:48:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:48:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-22 21:48:48,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.538135593220339 [2024-11-22 21:48:48,562 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 240 flow. Second operand 4 states and 127 transitions. [2024-11-22 21:48:48,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 316 flow [2024-11-22 21:48:48,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 307 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:48:48,565 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 233 flow [2024-11-22 21:48:48,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2024-11-22 21:48:48,567 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 8 predicate places. [2024-11-22 21:48:48,568 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 233 flow [2024-11-22 21:48:48,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:48,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:48,568 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:48,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 21:48:48,569 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:48,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:48,569 INFO L85 PathProgramCache]: Analyzing trace with hash 901372760, now seen corresponding path program 1 times [2024-11-22 21:48:48,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:48,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159488290] [2024-11-22 21:48:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:48,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:48,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:48,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159488290] [2024-11-22 21:48:48,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159488290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:48,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126468707] [2024-11-22 21:48:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:48,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:48,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:48,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:48:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:48,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:48:48,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:48,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:48,920 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 [2024-11-22 21:48:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:48,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126468707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:48,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:48,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-22 21:48:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462256608] [2024-11-22 21:48:48,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:48,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:48:48,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:48:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:48:49,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:48:49,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 233 flow. Second operand has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:49,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:49,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:48:49,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:49,604 INFO L124 PetriNetUnfolderBase]: 1709/3296 cut-off events. [2024-11-22 21:48:49,605 INFO L125 PetriNetUnfolderBase]: For 1116/1338 co-relation queries the response was YES. [2024-11-22 21:48:49,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7132 conditions, 3296 events. 1709/3296 cut-off events. For 1116/1338 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22942 event pairs, 918 based on Foata normal form. 237/3319 useless extension candidates. Maximal degree in co-relation 2377. Up to 1986 conditions per place. [2024-11-22 21:48:49,627 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 45 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-22 21:48:49,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 389 flow [2024-11-22 21:48:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:48:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:48:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-11-22 21:48:49,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6129943502824858 [2024-11-22 21:48:49,629 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 233 flow. Second operand 6 states and 217 transitions. [2024-11-22 21:48:49,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 389 flow [2024-11-22 21:48:49,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 384 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:49,632 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 265 flow [2024-11-22 21:48:49,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2024-11-22 21:48:49,633 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 12 predicate places. [2024-11-22 21:48:49,634 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 265 flow [2024-11-22 21:48:49,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:49,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:49,635 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:49,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:49,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-22 21:48:49,840 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:49,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2128554220, now seen corresponding path program 1 times [2024-11-22 21:48:49,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:49,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832746668] [2024-11-22 21:48:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:49,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:49,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:49,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832746668] [2024-11-22 21:48:49,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832746668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:49,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249893179] [2024-11-22 21:48:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:49,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:49,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:49,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:49,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:48:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:50,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:50,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:50,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:50,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249893179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:50,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:50,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:48:50,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026406408] [2024-11-22 21:48:50,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:50,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:48:50,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:48:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:50,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:48:50,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 265 flow. Second operand has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:50,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:50,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:48:50,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:50,586 INFO L124 PetriNetUnfolderBase]: 1213/2206 cut-off events. [2024-11-22 21:48:50,586 INFO L125 PetriNetUnfolderBase]: For 4465/4869 co-relation queries the response was YES. [2024-11-22 21:48:50,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 2206 events. 1213/2206 cut-off events. For 4465/4869 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13280 event pairs, 643 based on Foata normal form. 0/2039 useless extension candidates. Maximal degree in co-relation 2731. Up to 825 conditions per place. [2024-11-22 21:48:50,605 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 62 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-11-22 21:48:50,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 93 transitions, 563 flow [2024-11-22 21:48:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:48:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:48:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 325 transitions. [2024-11-22 21:48:50,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6120527306967984 [2024-11-22 21:48:50,607 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 265 flow. Second operand 9 states and 325 transitions. [2024-11-22 21:48:50,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 93 transitions, 563 flow [2024-11-22 21:48:50,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 523 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:48:50,611 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 287 flow [2024-11-22 21:48:50,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-11-22 21:48:50,612 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 17 predicate places. [2024-11-22 21:48:50,612 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 287 flow [2024-11-22 21:48:50,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:50,613 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:50,613 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:50,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:48:50,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:50,814 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:50,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:50,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1364141571, now seen corresponding path program 1 times [2024-11-22 21:48:50,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:50,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148869576] [2024-11-22 21:48:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:50,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:50,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:50,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148869576] [2024-11-22 21:48:50,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148869576] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:50,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594152589] [2024-11-22 21:48:50,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:50,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:50,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:50,924 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:50,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:48:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:51,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:51,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:51,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:51,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594152589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:51,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:51,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:48:51,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095446736] [2024-11-22 21:48:51,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:51,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:48:51,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:48:51,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:51,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:48:51,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 287 flow. Second operand has 14 states, 14 states have (on average 29.928571428571427) internal successors, (419), 14 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:51,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:51,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:48:51,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:51,632 INFO L124 PetriNetUnfolderBase]: 1359/2502 cut-off events. [2024-11-22 21:48:51,632 INFO L125 PetriNetUnfolderBase]: For 2026/2149 co-relation queries the response was YES. [2024-11-22 21:48:51,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6379 conditions, 2502 events. 1359/2502 cut-off events. For 2026/2149 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15162 event pairs, 676 based on Foata normal form. 64/2428 useless extension candidates. Maximal degree in co-relation 2893. Up to 947 conditions per place. [2024-11-22 21:48:51,649 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 69 selfloop transitions, 18 changer transitions 0/102 dead transitions. [2024-11-22 21:48:51,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 102 transitions, 594 flow [2024-11-22 21:48:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:48:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:48:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2024-11-22 21:48:51,652 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6203389830508474 [2024-11-22 21:48:51,652 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 287 flow. Second operand 10 states and 366 transitions. [2024-11-22 21:48:51,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 102 transitions, 594 flow [2024-11-22 21:48:51,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 102 transitions, 568 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:48:51,657 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 342 flow [2024-11-22 21:48:51,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=342, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-11-22 21:48:51,658 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 23 predicate places. [2024-11-22 21:48:51,658 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 342 flow [2024-11-22 21:48:51,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 29.928571428571427) internal successors, (419), 14 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:51,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:51,659 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:51,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:51,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:51,860 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:51,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:51,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1158569841, now seen corresponding path program 1 times [2024-11-22 21:48:51,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:51,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436944471] [2024-11-22 21:48:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:51,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:52,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:52,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436944471] [2024-11-22 21:48:52,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436944471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:52,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:52,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:48:52,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779265818] [2024-11-22 21:48:52,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:52,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:52,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:48:52,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-11-22 21:48:52,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 342 flow. Second operand has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:52,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:52,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-11-22 21:48:52,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:52,756 INFO L124 PetriNetUnfolderBase]: 1767/3158 cut-off events. [2024-11-22 21:48:52,756 INFO L125 PetriNetUnfolderBase]: For 8668/9257 co-relation queries the response was YES. [2024-11-22 21:48:52,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9423 conditions, 3158 events. 1767/3158 cut-off events. For 8668/9257 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 19396 event pairs, 748 based on Foata normal form. 0/2987 useless extension candidates. Maximal degree in co-relation 5987. Up to 1518 conditions per place. [2024-11-22 21:48:52,772 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 60 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-11-22 21:48:52,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 599 flow [2024-11-22 21:48:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:48:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:48:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-11-22 21:48:52,774 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5451977401129944 [2024-11-22 21:48:52,774 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 342 flow. Second operand 6 states and 193 transitions. [2024-11-22 21:48:52,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 599 flow [2024-11-22 21:48:52,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 569 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-22 21:48:52,780 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 355 flow [2024-11-22 21:48:52,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2024-11-22 21:48:52,780 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 24 predicate places. [2024-11-22 21:48:52,781 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 355 flow [2024-11-22 21:48:52,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:52,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:52,781 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:52,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 21:48:52,781 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:52,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:52,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1555925836, now seen corresponding path program 1 times [2024-11-22 21:48:52,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:52,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927254934] [2024-11-22 21:48:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:52,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:52,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:52,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927254934] [2024-11-22 21:48:52,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927254934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:52,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093346119] [2024-11-22 21:48:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:52,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:52,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:52,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:52,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:48:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:53,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:48:53,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:53,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:53,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-22 21:48:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:53,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093346119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:53,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:53,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-22 21:48:53,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655151259] [2024-11-22 21:48:53,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:53,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:48:53,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:48:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:48:54,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:48:54,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 355 flow. Second operand has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:54,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:54,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:48:54,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:54,846 INFO L124 PetriNetUnfolderBase]: 1633/2914 cut-off events. [2024-11-22 21:48:54,846 INFO L125 PetriNetUnfolderBase]: For 9261/9959 co-relation queries the response was YES. [2024-11-22 21:48:54,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9643 conditions, 2914 events. 1633/2914 cut-off events. For 9261/9959 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17761 event pairs, 872 based on Foata normal form. 1/2782 useless extension candidates. Maximal degree in co-relation 6391. Up to 799 conditions per place. [2024-11-22 21:48:54,867 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 117 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2024-11-22 21:48:54,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 157 transitions, 1109 flow [2024-11-22 21:48:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 21:48:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-22 21:48:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 662 transitions. [2024-11-22 21:48:54,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5905441570026762 [2024-11-22 21:48:54,870 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 355 flow. Second operand 19 states and 662 transitions. [2024-11-22 21:48:54,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 157 transitions, 1109 flow [2024-11-22 21:48:54,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 157 transitions, 1100 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:48:54,880 INFO L231 Difference]: Finished difference. Result has 101 places, 74 transitions, 446 flow [2024-11-22 21:48:54,880 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=446, PETRI_PLACES=101, PETRI_TRANSITIONS=74} [2024-11-22 21:48:54,880 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 41 predicate places. [2024-11-22 21:48:54,880 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 74 transitions, 446 flow [2024-11-22 21:48:54,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:54,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:54,881 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:54,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 21:48:55,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 21:48:55,082 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:55,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash 395776527, now seen corresponding path program 2 times [2024-11-22 21:48:55,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:55,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710720257] [2024-11-22 21:48:55,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:55,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:55,103 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:48:55,107 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:48:55,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:55,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710720257] [2024-11-22 21:48:55,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710720257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:55,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:55,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:48:55,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958530859] [2024-11-22 21:48:55,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:55,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:55,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:48:55,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-11-22 21:48:55,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 74 transitions, 446 flow. Second operand has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:55,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:55,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-11-22 21:48:55,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:55,895 INFO L124 PetriNetUnfolderBase]: 1721/3087 cut-off events. [2024-11-22 21:48:55,895 INFO L125 PetriNetUnfolderBase]: For 10475/11197 co-relation queries the response was YES. [2024-11-22 21:48:55,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10831 conditions, 3087 events. 1721/3087 cut-off events. For 10475/11197 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19442 event pairs, 493 based on Foata normal form. 18/3029 useless extension candidates. Maximal degree in co-relation 7221. Up to 1147 conditions per place. [2024-11-22 21:48:55,910 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 87 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2024-11-22 21:48:55,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 113 transitions, 904 flow [2024-11-22 21:48:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:48:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:48:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-11-22 21:48:55,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5351089588377724 [2024-11-22 21:48:55,912 INFO L175 Difference]: Start difference. First operand has 101 places, 74 transitions, 446 flow. Second operand 7 states and 221 transitions. [2024-11-22 21:48:55,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 113 transitions, 904 flow [2024-11-22 21:48:55,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 113 transitions, 886 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:48:55,924 INFO L231 Difference]: Finished difference. Result has 100 places, 73 transitions, 450 flow [2024-11-22 21:48:55,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=100, PETRI_TRANSITIONS=73} [2024-11-22 21:48:55,924 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 40 predicate places. [2024-11-22 21:48:55,924 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 73 transitions, 450 flow [2024-11-22 21:48:55,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:55,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:55,925 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:55,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:48:55,925 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:55,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:55,925 INFO L85 PathProgramCache]: Analyzing trace with hash -615828695, now seen corresponding path program 1 times [2024-11-22 21:48:55,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:55,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889120144] [2024-11-22 21:48:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:55,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:48:56,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:56,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889120144] [2024-11-22 21:48:56,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889120144] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:56,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435495414] [2024-11-22 21:48:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:56,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:56,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:56,191 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:56,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:48:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:56,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:48:56,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:48:56,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:56,460 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 [2024-11-22 21:48:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:48:56,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435495414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:56,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:56,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-22 21:48:56,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716067245] [2024-11-22 21:48:56,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:56,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:48:56,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:56,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:48:56,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:48:57,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:48:57,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 73 transitions, 450 flow. Second operand has 18 states, 18 states have (on average 30.166666666666668) internal successors, (543), 18 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:57,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:57,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:48:57,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:58,015 INFO L124 PetriNetUnfolderBase]: 2034/3531 cut-off events. [2024-11-22 21:48:58,016 INFO L125 PetriNetUnfolderBase]: For 12366/13330 co-relation queries the response was YES. [2024-11-22 21:48:58,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12931 conditions, 3531 events. 2034/3531 cut-off events. For 12366/13330 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 20865 event pairs, 778 based on Foata normal form. 1/3423 useless extension candidates. Maximal degree in co-relation 8626. Up to 1184 conditions per place. [2024-11-22 21:48:58,031 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 108 selfloop transitions, 22 changer transitions 0/145 dead transitions. [2024-11-22 21:48:58,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 145 transitions, 1138 flow [2024-11-22 21:48:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:48:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:48:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 493 transitions. [2024-11-22 21:48:58,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5968523002421308 [2024-11-22 21:48:58,033 INFO L175 Difference]: Start difference. First operand has 100 places, 73 transitions, 450 flow. Second operand 14 states and 493 transitions. [2024-11-22 21:48:58,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 145 transitions, 1138 flow [2024-11-22 21:48:58,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 145 transitions, 1104 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:48:58,042 INFO L231 Difference]: Finished difference. Result has 110 places, 79 transitions, 520 flow [2024-11-22 21:48:58,043 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=520, PETRI_PLACES=110, PETRI_TRANSITIONS=79} [2024-11-22 21:48:58,043 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 50 predicate places. [2024-11-22 21:48:58,043 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 79 transitions, 520 flow [2024-11-22 21:48:58,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 30.166666666666668) internal successors, (543), 18 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:58,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:58,044 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:58,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:58,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 21:48:58,247 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:58,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash 370866574, now seen corresponding path program 2 times [2024-11-22 21:48:58,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:58,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273880152] [2024-11-22 21:48:58,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:58,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:58,261 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:48:58,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:48:58,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:58,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273880152] [2024-11-22 21:48:58,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273880152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:58,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:58,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:48:58,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052619671] [2024-11-22 21:48:58,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:58,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:58,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:58,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:48:58,624 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-22 21:48:58,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 79 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:58,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:58,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-22 21:48:58,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:59,125 INFO L124 PetriNetUnfolderBase]: 2885/4707 cut-off events. [2024-11-22 21:48:59,125 INFO L125 PetriNetUnfolderBase]: For 18905/20149 co-relation queries the response was YES. [2024-11-22 21:48:59,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18041 conditions, 4707 events. 2885/4707 cut-off events. For 18905/20149 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 27196 event pairs, 1291 based on Foata normal form. 92/4753 useless extension candidates. Maximal degree in co-relation 13192. Up to 2591 conditions per place. [2024-11-22 21:48:59,156 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 100 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2024-11-22 21:48:59,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 129 transitions, 1110 flow [2024-11-22 21:48:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:48:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:48:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-11-22 21:48:59,158 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6101694915254238 [2024-11-22 21:48:59,158 INFO L175 Difference]: Start difference. First operand has 110 places, 79 transitions, 520 flow. Second operand 6 states and 216 transitions. [2024-11-22 21:48:59,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 129 transitions, 1110 flow [2024-11-22 21:48:59,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 129 transitions, 1083 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-22 21:48:59,171 INFO L231 Difference]: Finished difference. Result has 109 places, 81 transitions, 561 flow [2024-11-22 21:48:59,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=561, PETRI_PLACES=109, PETRI_TRANSITIONS=81} [2024-11-22 21:48:59,171 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 49 predicate places. [2024-11-22 21:48:59,172 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 81 transitions, 561 flow [2024-11-22 21:48:59,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:59,172 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:59,172 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:59,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:48:59,172 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:48:59,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash -419299742, now seen corresponding path program 2 times [2024-11-22 21:48:59,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:59,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010620353] [2024-11-22 21:48:59,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:59,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:59,208 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:59,208 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:48:59,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010620353] [2024-11-22 21:48:59,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010620353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927760713] [2024-11-22 21:48:59,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:59,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:59,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:59,473 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:59,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:48:59,564 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:59,564 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:59,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 21:48:59,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:59,577 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 [2024-11-22 21:48:59,650 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:48:59,650 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 [2024-11-22 21:48:59,664 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 16 treesize of output 11 [2024-11-22 21:48:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:48:59,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:59,907 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 [2024-11-22 21:49:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:49:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927760713] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:00,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:00,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 18 [2024-11-22 21:49:00,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430319324] [2024-11-22 21:49:00,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:00,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:49:00,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:00,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:49:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:49:00,856 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-22 21:49:00,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 81 transitions, 561 flow. Second operand has 20 states, 20 states have (on average 24.3) internal successors, (486), 20 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:00,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:00,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-22 21:49:00,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:02,721 INFO L124 PetriNetUnfolderBase]: 7027/10561 cut-off events. [2024-11-22 21:49:02,721 INFO L125 PetriNetUnfolderBase]: For 33521/34614 co-relation queries the response was YES. [2024-11-22 21:49:02,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40876 conditions, 10561 events. 7027/10561 cut-off events. For 33521/34614 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 60472 event pairs, 1088 based on Foata normal form. 324/10880 useless extension candidates. Maximal degree in co-relation 30459. Up to 2295 conditions per place. [2024-11-22 21:49:02,783 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 214 selfloop transitions, 30 changer transitions 0/253 dead transitions. [2024-11-22 21:49:02,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 253 transitions, 2130 flow [2024-11-22 21:49:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 21:49:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-22 21:49:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 568 transitions. [2024-11-22 21:49:02,785 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5348399246704332 [2024-11-22 21:49:02,785 INFO L175 Difference]: Start difference. First operand has 109 places, 81 transitions, 561 flow. Second operand 18 states and 568 transitions. [2024-11-22 21:49:02,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 253 transitions, 2130 flow [2024-11-22 21:49:02,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 253 transitions, 1981 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-22 21:49:02,820 INFO L231 Difference]: Finished difference. Result has 122 places, 91 transitions, 677 flow [2024-11-22 21:49:02,821 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=677, PETRI_PLACES=122, PETRI_TRANSITIONS=91} [2024-11-22 21:49:02,821 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-11-22 21:49:02,821 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 91 transitions, 677 flow [2024-11-22 21:49:02,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 24.3) internal successors, (486), 20 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:02,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:02,822 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:02,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 21:49:03,022 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,SelfDestructingSolverStorable17 [2024-11-22 21:49:03,023 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:49:03,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:03,023 INFO L85 PathProgramCache]: Analyzing trace with hash -113389267, now seen corresponding path program 1 times [2024-11-22 21:49:03,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:03,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525776111] [2024-11-22 21:49:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:03,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:49:03,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525776111] [2024-11-22 21:49:03,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525776111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:03,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901755197] [2024-11-22 21:49:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:03,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:03,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:03,465 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:03,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:49:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:03,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:49:03,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:49:03,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:03,795 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 [2024-11-22 21:49:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:49:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901755197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:03,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:03,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-22 21:49:03,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800991797] [2024-11-22 21:49:03,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:03,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 21:49:03,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:03,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 21:49:03,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-22 21:49:04,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:49:04,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 91 transitions, 677 flow. Second operand has 22 states, 22 states have (on average 29.681818181818183) internal successors, (653), 22 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:04,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:04,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:49:04,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:05,713 INFO L124 PetriNetUnfolderBase]: 2959/5579 cut-off events. [2024-11-22 21:49:05,713 INFO L125 PetriNetUnfolderBase]: For 22456/22976 co-relation queries the response was YES. [2024-11-22 21:49:05,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22251 conditions, 5579 events. 2959/5579 cut-off events. For 22456/22976 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 37815 event pairs, 1178 based on Foata normal form. 135/5582 useless extension candidates. Maximal degree in co-relation 15574. Up to 1946 conditions per place. [2024-11-22 21:49:05,746 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 112 selfloop transitions, 21 changer transitions 0/151 dead transitions. [2024-11-22 21:49:05,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 151 transitions, 1281 flow [2024-11-22 21:49:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 21:49:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-22 21:49:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 428 transitions. [2024-11-22 21:49:05,747 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6045197740112994 [2024-11-22 21:49:05,747 INFO L175 Difference]: Start difference. First operand has 122 places, 91 transitions, 677 flow. Second operand 12 states and 428 transitions. [2024-11-22 21:49:05,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 151 transitions, 1281 flow [2024-11-22 21:49:05,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 151 transitions, 1239 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-11-22 21:49:05,766 INFO L231 Difference]: Finished difference. Result has 124 places, 91 transitions, 684 flow [2024-11-22 21:49:05,767 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=684, PETRI_PLACES=124, PETRI_TRANSITIONS=91} [2024-11-22 21:49:05,767 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 64 predicate places. [2024-11-22 21:49:05,767 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 91 transitions, 684 flow [2024-11-22 21:49:05,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 29.681818181818183) internal successors, (653), 22 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:05,768 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:05,768 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:05,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 21:49:05,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:05,969 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:49:05,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:05,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1600887366, now seen corresponding path program 1 times [2024-11-22 21:49:05,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:05,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098733758] [2024-11-22 21:49:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:05,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:06,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:06,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098733758] [2024-11-22 21:49:06,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098733758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:06,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236755780] [2024-11-22 21:49:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:06,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:06,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:06,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:06,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:49:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:06,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:49:06,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:06,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:06,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236755780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:06,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:06,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-22 21:49:06,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060105985] [2024-11-22 21:49:06,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:06,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:49:06,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:49:06,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:49:06,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:49:06,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 91 transitions, 684 flow. Second operand has 15 states, 15 states have (on average 30.4) internal successors, (456), 15 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:06,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:06,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:49:06,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:07,040 INFO L124 PetriNetUnfolderBase]: 3008/4854 cut-off events. [2024-11-22 21:49:07,040 INFO L125 PetriNetUnfolderBase]: For 27554/28605 co-relation queries the response was YES. [2024-11-22 21:49:07,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21193 conditions, 4854 events. 3008/4854 cut-off events. For 27554/28605 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 27483 event pairs, 1626 based on Foata normal form. 125/4810 useless extension candidates. Maximal degree in co-relation 15475. Up to 2651 conditions per place. [2024-11-22 21:49:07,065 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 96 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2024-11-22 21:49:07,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 134 transitions, 1256 flow [2024-11-22 21:49:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:49:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:49:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 360 transitions. [2024-11-22 21:49:07,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6101694915254238 [2024-11-22 21:49:07,066 INFO L175 Difference]: Start difference. First operand has 124 places, 91 transitions, 684 flow. Second operand 10 states and 360 transitions. [2024-11-22 21:49:07,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 134 transitions, 1256 flow [2024-11-22 21:49:07,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 134 transitions, 1198 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-22 21:49:07,080 INFO L231 Difference]: Finished difference. Result has 124 places, 90 transitions, 698 flow [2024-11-22 21:49:07,080 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=698, PETRI_PLACES=124, PETRI_TRANSITIONS=90} [2024-11-22 21:49:07,081 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 64 predicate places. [2024-11-22 21:49:07,081 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 90 transitions, 698 flow [2024-11-22 21:49:07,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 30.4) internal successors, (456), 15 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:07,081 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:07,081 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:07,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:49:07,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:07,282 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:49:07,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2134432003, now seen corresponding path program 2 times [2024-11-22 21:49:07,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:07,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061830759] [2024-11-22 21:49:07,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:07,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:07,296 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:49:07,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-22 21:49:07,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:07,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061830759] [2024-11-22 21:49:07,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061830759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:07,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297884421] [2024-11-22 21:49:07,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:07,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:07,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:07,480 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:07,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:49:07,576 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:49:07,576 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:07,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 21:49:07,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:07,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:49:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-22 21:49:07,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-22 21:49:08,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297884421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:08,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:08,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-22 21:49:08,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185019973] [2024-11-22 21:49:08,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:08,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:49:08,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:49:08,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:49:08,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-22 21:49:08,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 90 transitions, 698 flow. Second operand has 16 states, 16 states have (on average 28.75) internal successors, (460), 16 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:08,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:08,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-22 21:49:08,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:09,710 INFO L124 PetriNetUnfolderBase]: 4397/6972 cut-off events. [2024-11-22 21:49:09,710 INFO L125 PetriNetUnfolderBase]: For 26756/27355 co-relation queries the response was YES. [2024-11-22 21:49:09,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29458 conditions, 6972 events. 4397/6972 cut-off events. For 26756/27355 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 40753 event pairs, 1634 based on Foata normal form. 142/6881 useless extension candidates. Maximal degree in co-relation 21290. Up to 3186 conditions per place. [2024-11-22 21:49:09,757 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 127 selfloop transitions, 14 changer transitions 0/153 dead transitions. [2024-11-22 21:49:09,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 153 transitions, 1476 flow [2024-11-22 21:49:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:49:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:49:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-11-22 21:49:09,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6016949152542372 [2024-11-22 21:49:09,759 INFO L175 Difference]: Start difference. First operand has 124 places, 90 transitions, 698 flow. Second operand 6 states and 213 transitions. [2024-11-22 21:49:09,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 153 transitions, 1476 flow [2024-11-22 21:49:09,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 153 transitions, 1427 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-22 21:49:09,799 INFO L231 Difference]: Finished difference. Result has 120 places, 89 transitions, 675 flow [2024-11-22 21:49:09,799 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=675, PETRI_PLACES=120, PETRI_TRANSITIONS=89} [2024-11-22 21:49:09,800 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 60 predicate places. [2024-11-22 21:49:09,800 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 89 transitions, 675 flow [2024-11-22 21:49:09,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 28.75) internal successors, (460), 16 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:09,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:09,800 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:09,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 21:49:10,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-22 21:49:10,005 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:49:10,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash -196098730, now seen corresponding path program 1 times [2024-11-22 21:49:10,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:10,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552042800] [2024-11-22 21:49:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:10,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:10,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:10,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552042800] [2024-11-22 21:49:10,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552042800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351130249] [2024-11-22 21:49:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:10,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:10,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:10,106 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:10,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:49:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:10,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:49:10,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:10,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:10,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351130249] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:10,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:49:10,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-22 21:49:10,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603799383] [2024-11-22 21:49:10,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:10,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:49:10,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:49:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:49:10,307 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:49:10,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 89 transitions, 675 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:10,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:10,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:49:10,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:10,969 INFO L124 PetriNetUnfolderBase]: 3325/5891 cut-off events. [2024-11-22 21:49:10,969 INFO L125 PetriNetUnfolderBase]: For 24101/24589 co-relation queries the response was YES. [2024-11-22 21:49:10,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24370 conditions, 5891 events. 3325/5891 cut-off events. For 24101/24589 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 37159 event pairs, 1216 based on Foata normal form. 242/6038 useless extension candidates. Maximal degree in co-relation 17737. Up to 2538 conditions per place. [2024-11-22 21:49:11,123 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 92 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2024-11-22 21:49:11,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 118 transitions, 1099 flow [2024-11-22 21:49:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:49:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:49:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-11-22 21:49:11,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6271186440677966 [2024-11-22 21:49:11,124 INFO L175 Difference]: Start difference. First operand has 120 places, 89 transitions, 675 flow. Second operand 5 states and 185 transitions. [2024-11-22 21:49:11,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 118 transitions, 1099 flow [2024-11-22 21:49:11,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 118 transitions, 1069 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:49:11,145 INFO L231 Difference]: Finished difference. Result has 120 places, 86 transitions, 649 flow [2024-11-22 21:49:11,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=649, PETRI_PLACES=120, PETRI_TRANSITIONS=86} [2024-11-22 21:49:11,145 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 60 predicate places. [2024-11-22 21:49:11,145 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 86 transitions, 649 flow [2024-11-22 21:49:11,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:11,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:11,146 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:11,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 21:49:11,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:11,351 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:49:11,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash -682628513, now seen corresponding path program 2 times [2024-11-22 21:49:11,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:11,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84207915] [2024-11-22 21:49:11,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:11,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:11,385 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:11,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:49:11,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:11,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84207915] [2024-11-22 21:49:11,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84207915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:11,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370466045] [2024-11-22 21:49:11,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:11,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:11,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:11,669 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:11,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:49:11,767 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:11,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:11,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:49:11,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:11,776 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 [2024-11-22 21:49:11,825 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:49:11,825 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 [2024-11-22 21:49:11,829 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 18 treesize of output 13 [2024-11-22 21:49:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:49:12,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:12,350 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 65 treesize of output 61 [2024-11-22 21:49:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:49:12,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370466045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:12,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:12,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2024-11-22 21:49:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182275270] [2024-11-22 21:49:12,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:12,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 21:49:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 21:49:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-11-22 21:49:13,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-11-22 21:49:13,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 86 transitions, 649 flow. Second operand has 22 states, 22 states have (on average 26.681818181818183) internal successors, (587), 22 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:13,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:13,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-11-22 21:49:13,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:14,034 INFO L124 PetriNetUnfolderBase]: 3491/5531 cut-off events. [2024-11-22 21:49:14,035 INFO L125 PetriNetUnfolderBase]: For 27331/28276 co-relation queries the response was YES. [2024-11-22 21:49:14,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23810 conditions, 5531 events. 3491/5531 cut-off events. For 27331/28276 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 31657 event pairs, 745 based on Foata normal form. 134/5458 useless extension candidates. Maximal degree in co-relation 18112. Up to 1936 conditions per place. [2024-11-22 21:49:14,074 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 126 selfloop transitions, 19 changer transitions 0/158 dead transitions. [2024-11-22 21:49:14,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 158 transitions, 1523 flow [2024-11-22 21:49:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:49:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:49:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 258 transitions. [2024-11-22 21:49:14,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5466101694915254 [2024-11-22 21:49:14,075 INFO L175 Difference]: Start difference. First operand has 120 places, 86 transitions, 649 flow. Second operand 8 states and 258 transitions. [2024-11-22 21:49:14,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 158 transitions, 1523 flow [2024-11-22 21:49:14,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 158 transitions, 1475 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-22 21:49:14,104 INFO L231 Difference]: Finished difference. Result has 123 places, 87 transitions, 677 flow [2024-11-22 21:49:14,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=677, PETRI_PLACES=123, PETRI_TRANSITIONS=87} [2024-11-22 21:49:14,104 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 63 predicate places. [2024-11-22 21:49:14,105 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 87 transitions, 677 flow [2024-11-22 21:49:14,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 26.681818181818183) internal successors, (587), 22 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:14,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:14,105 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:14,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:14,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:14,306 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:49:14,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:14,306 INFO L85 PathProgramCache]: Analyzing trace with hash 313353444, now seen corresponding path program 1 times [2024-11-22 21:49:14,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:14,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452635775] [2024-11-22 21:49:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:14,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:49:14,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:14,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452635775] [2024-11-22 21:49:14,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452635775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:14,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220964864] [2024-11-22 21:49:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:14,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:14,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:14,550 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:14,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:49:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:14,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 21:49:14,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:14,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:15,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-22 21:49:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:15,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220964864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:15,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:15,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2024-11-22 21:49:15,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036446803] [2024-11-22 21:49:15,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:15,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 21:49:15,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:15,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 21:49:15,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-22 21:49:16,445 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-22 21:49:16,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 87 transitions, 677 flow. Second operand has 28 states, 28 states have (on average 29.25) internal successors, (819), 28 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:16,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:16,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-22 21:49:16,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:18,705 INFO L124 PetriNetUnfolderBase]: 7368/11674 cut-off events. [2024-11-22 21:49:18,705 INFO L125 PetriNetUnfolderBase]: For 56817/59346 co-relation queries the response was YES. [2024-11-22 21:49:18,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50880 conditions, 11674 events. 7368/11674 cut-off events. For 56817/59346 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 76936 event pairs, 1611 based on Foata normal form. 402/11615 useless extension candidates. Maximal degree in co-relation 42243. Up to 1904 conditions per place. [2024-11-22 21:49:18,794 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 335 selfloop transitions, 54 changer transitions 0/404 dead transitions. [2024-11-22 21:49:18,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 404 transitions, 3655 flow [2024-11-22 21:49:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-22 21:49:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-22 21:49:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1078 transitions. [2024-11-22 21:49:18,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6090395480225989 [2024-11-22 21:49:18,796 INFO L175 Difference]: Start difference. First operand has 123 places, 87 transitions, 677 flow. Second operand 30 states and 1078 transitions. [2024-11-22 21:49:18,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 404 transitions, 3655 flow [2024-11-22 21:49:18,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 404 transitions, 3588 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-11-22 21:49:18,883 INFO L231 Difference]: Finished difference. Result has 148 places, 114 transitions, 1003 flow [2024-11-22 21:49:18,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1003, PETRI_PLACES=148, PETRI_TRANSITIONS=114} [2024-11-22 21:49:18,884 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 88 predicate places. [2024-11-22 21:49:18,884 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 114 transitions, 1003 flow [2024-11-22 21:49:18,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 29.25) internal successors, (819), 28 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:18,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:18,884 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:18,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:19,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-22 21:49:19,085 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:49:19,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash 291580922, now seen corresponding path program 1 times [2024-11-22 21:49:19,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:19,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439142915] [2024-11-22 21:49:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:19,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:49:19,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:19,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439142915] [2024-11-22 21:49:19,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439142915] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:19,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:19,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:49:19,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564703388] [2024-11-22 21:49:19,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:19,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:49:19,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:19,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:49:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:49:19,152 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:49:19,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 114 transitions, 1003 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:19,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:19,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:49:19,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:20,536 INFO L124 PetriNetUnfolderBase]: 7054/11679 cut-off events. [2024-11-22 21:49:20,536 INFO L125 PetriNetUnfolderBase]: For 56366/58697 co-relation queries the response was YES. [2024-11-22 21:49:20,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49286 conditions, 11679 events. 7054/11679 cut-off events. For 56366/58697 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 81213 event pairs, 2172 based on Foata normal form. 458/11373 useless extension candidates. Maximal degree in co-relation 46458. Up to 5253 conditions per place. [2024-11-22 21:49:20,648 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 99 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-11-22 21:49:20,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 136 transitions, 1396 flow [2024-11-22 21:49:20,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:49:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:49:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-11-22 21:49:20,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6483050847457628 [2024-11-22 21:49:20,649 INFO L175 Difference]: Start difference. First operand has 148 places, 114 transitions, 1003 flow. Second operand 4 states and 153 transitions. [2024-11-22 21:49:20,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 136 transitions, 1396 flow [2024-11-22 21:49:20,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 136 transitions, 1267 flow, removed 19 selfloop flow, removed 14 redundant places. [2024-11-22 21:49:20,729 INFO L231 Difference]: Finished difference. Result has 136 places, 109 transitions, 849 flow [2024-11-22 21:49:20,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=849, PETRI_PLACES=136, PETRI_TRANSITIONS=109} [2024-11-22 21:49:20,730 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2024-11-22 21:49:20,730 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 109 transitions, 849 flow [2024-11-22 21:49:20,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:20,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:20,731 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:20,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-22 21:49:20,731 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:49:20,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:20,732 INFO L85 PathProgramCache]: Analyzing trace with hash 227059497, now seen corresponding path program 1 times [2024-11-22 21:49:20,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:20,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313010358] [2024-11-22 21:49:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:20,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:49:20,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:20,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313010358] [2024-11-22 21:49:20,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313010358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:20,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407663001] [2024-11-22 21:49:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:20,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:20,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:20,882 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:20,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 21:49:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:20,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:49:20,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:49:21,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:49:21,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407663001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:21,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:21,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-22 21:49:21,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414466365] [2024-11-22 21:49:21,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:21,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:49:21,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:21,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:49:21,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:49:21,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:49:21,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 109 transitions, 849 flow. Second operand has 20 states, 20 states have (on average 30.45) internal successors, (609), 20 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:21,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:21,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:49:21,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:22,376 INFO L124 PetriNetUnfolderBase]: 5709/9677 cut-off events. [2024-11-22 21:49:22,376 INFO L125 PetriNetUnfolderBase]: For 41041/42465 co-relation queries the response was YES. [2024-11-22 21:49:22,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39167 conditions, 9677 events. 5709/9677 cut-off events. For 41041/42465 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 66748 event pairs, 2682 based on Foata normal form. 300/9482 useless extension candidates. Maximal degree in co-relation 34665. Up to 2995 conditions per place. [2024-11-22 21:49:22,456 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 135 selfloop transitions, 32 changer transitions 0/188 dead transitions. [2024-11-22 21:49:22,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 188 transitions, 1759 flow [2024-11-22 21:49:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 21:49:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-22 21:49:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 434 transitions. [2024-11-22 21:49:22,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6129943502824858 [2024-11-22 21:49:22,458 INFO L175 Difference]: Start difference. First operand has 136 places, 109 transitions, 849 flow. Second operand 12 states and 434 transitions. [2024-11-22 21:49:22,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 188 transitions, 1759 flow [2024-11-22 21:49:22,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 188 transitions, 1683 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:22,510 INFO L231 Difference]: Finished difference. Result has 147 places, 113 transitions, 930 flow [2024-11-22 21:49:22,510 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=930, PETRI_PLACES=147, PETRI_TRANSITIONS=113} [2024-11-22 21:49:22,510 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 87 predicate places. [2024-11-22 21:49:22,510 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 113 transitions, 930 flow [2024-11-22 21:49:22,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.45) internal successors, (609), 20 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:22,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:22,511 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:22,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:22,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-22 21:49:22,711 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:49:22,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:22,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1616142578, now seen corresponding path program 2 times [2024-11-22 21:49:22,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:22,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091196227] [2024-11-22 21:49:22,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:22,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:22,725 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:49:22,725 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:49:22,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:22,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091196227] [2024-11-22 21:49:22,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091196227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:22,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548219894] [2024-11-22 21:49:22,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:22,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:22,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:22,882 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) [2024-11-22 21:49:22,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 21:49:22,987 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:49:22,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:22,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-22 21:49:22,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:23,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:49:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:49:23,348 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:49:23,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548219894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:23,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:23,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:49:23,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71903354] [2024-11-22 21:49:23,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:23,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:49:23,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:23,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:49:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:49:24,271 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-22 21:49:24,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 113 transitions, 930 flow. Second operand has 17 states, 17 states have (on average 29.176470588235293) internal successors, (496), 17 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:24,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:24,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-22 21:49:24,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:25,385 INFO L124 PetriNetUnfolderBase]: 7178/11241 cut-off events. [2024-11-22 21:49:25,386 INFO L125 PetriNetUnfolderBase]: For 52786/54909 co-relation queries the response was YES. [2024-11-22 21:49:25,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47810 conditions, 11241 events. 7178/11241 cut-off events. For 52786/54909 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 72854 event pairs, 1303 based on Foata normal form. 144/10965 useless extension candidates. Maximal degree in co-relation 42997. Up to 4698 conditions per place. [2024-11-22 21:49:25,482 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 132 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2024-11-22 21:49:25,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 173 transitions, 1689 flow [2024-11-22 21:49:25,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:49:25,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:49:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-11-22 21:49:25,483 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5903954802259888 [2024-11-22 21:49:25,483 INFO L175 Difference]: Start difference. First operand has 147 places, 113 transitions, 930 flow. Second operand 6 states and 209 transitions. [2024-11-22 21:49:25,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 173 transitions, 1689 flow [2024-11-22 21:49:25,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 173 transitions, 1628 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-11-22 21:49:25,536 INFO L231 Difference]: Finished difference. Result has 141 places, 112 transitions, 907 flow [2024-11-22 21:49:25,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=907, PETRI_PLACES=141, PETRI_TRANSITIONS=112} [2024-11-22 21:49:25,537 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 81 predicate places. [2024-11-22 21:49:25,537 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 112 transitions, 907 flow [2024-11-22 21:49:25,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.176470588235293) internal successors, (496), 17 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:25,537 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:25,537 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:25,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:25,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-22 21:49:25,738 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:49:25,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1022257387, now seen corresponding path program 1 times [2024-11-22 21:49:25,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:25,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025496078] [2024-11-22 21:49:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:25,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:26,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:26,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025496078] [2024-11-22 21:49:26,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025496078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:26,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105076667] [2024-11-22 21:49:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:26,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:26,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:26,293 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) [2024-11-22 21:49:26,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 21:49:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:26,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-22 21:49:26,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:26,410 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 [2024-11-22 21:49:26,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:49:26,481 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:49:26,481 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 [2024-11-22 21:49:26,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:49:26,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-22 21:49:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:26,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:39,346 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-22 21:49:39,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1610 treesize of output 1180 [2024-11-22 21:49:39,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:49:39,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 640 treesize of output 598 [2024-11-22 21:49:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:47,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105076667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:47,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:47,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2024-11-22 21:49:47,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359463052] [2024-11-22 21:49:47,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:47,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-22 21:49:47,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:47,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-22 21:49:47,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=940, Unknown=3, NotChecked=0, Total=1056 [2024-11-22 21:49:51,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:49:55,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]