./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 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum.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.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:19:19,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:19:19,207 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:19:19,213 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:19:19,214 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:19:19,248 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:19:19,249 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:19:19,250 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:19:19,251 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:19:19,253 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:19:19,253 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:19:19,253 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:19:19,254 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:19:19,254 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:19:19,256 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:19:19,257 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:19:19,257 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:19:19,257 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:19:19,258 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:19:19,258 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:19:19,261 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:19:19,262 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:19:19,275 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:19:19,275 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:19:19,276 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:19:19,276 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:19:19,276 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:19:19,276 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:19:19,277 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:19:19,277 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:19:19,277 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:19:19,277 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:19:19,278 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:19:19,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:19:19,278 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:19:19,278 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:19:19,279 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:19:19,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:19:19,279 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:19:19,279 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:19:19,280 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:19:19,280 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:19:19,281 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 [2024-11-10 18:19:19,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:19:19,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:19:19,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:19:19,655 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:19:19,656 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:19:19,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-10 18:19:21,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:19:21,418 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:19:21,418 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-10 18:19:21,426 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400f46293/6ce58e721fd34b5997a76fcaa8fd5250/FLAG882092cae [2024-11-10 18:19:21,439 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400f46293/6ce58e721fd34b5997a76fcaa8fd5250 [2024-11-10 18:19:21,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:19:21,442 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:19:21,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:19:21,443 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:19:21,448 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:19:21,448 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,449 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1114df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21, skipping insertion in model container [2024-11-10 18:19:21,449 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,471 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:19:21,673 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:19:21,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:19:21,688 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:19:21,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:19:21,735 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:19:21,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21 WrapperNode [2024-11-10 18:19:21,736 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:19:21,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:19:21,737 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:19:21,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:19:21,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,782 INFO L138 Inliner]: procedures = 22, calls = 32, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 261 [2024-11-10 18:19:21,783 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:19:21,784 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:19:21,784 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:19:21,784 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:19:21,793 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,798 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,821 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]. [2024-11-10 18:19:21,824 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,828 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,840 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,841 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,844 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,846 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,853 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:19:21,854 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:19:21,855 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:19:21,855 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:19:21,859 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:19:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:21,895 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) [2024-11-10 18:19:21,897 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 [2024-11-10 18:19:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:19:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:19:21,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:19:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:19:21,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:19:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:19:21,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:19:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:19:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:19:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:19:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:19:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:19:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:19:21,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:19:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:19:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:19:21,937 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:19:22,090 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:19:22,093 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:19:22,618 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:19:22,618 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:19:23,076 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:19:23,077 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:19:23,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:19:23 BoogieIcfgContainer [2024-11-10 18:19:23,083 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:19:23,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:19:23,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:19:23,108 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:19:23,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:19:21" (1/3) ... [2024-11-10 18:19:23,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@799d7ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:19:23, skipping insertion in model container [2024-11-10 18:19:23,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (2/3) ... [2024-11-10 18:19:23,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@799d7ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:19:23, skipping insertion in model container [2024-11-10 18:19:23,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:19:23" (3/3) ... [2024-11-10 18:19:23,116 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2024-11-10 18:19:23,141 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:19:23,142 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-10 18:19:23,142 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:19:23,221 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:19:23,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 74 transitions, 169 flow [2024-11-10 18:19:23,304 INFO L124 PetriNetUnfolderBase]: 10/71 cut-off events. [2024-11-10 18:19:23,308 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:19:23,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 71 events. 10/71 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 174 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2024-11-10 18:19:23,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 74 transitions, 169 flow [2024-11-10 18:19:23,320 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 70 transitions, 158 flow [2024-11-10 18:19:23,331 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:19:23,339 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;@5b0fd865, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:19:23,339 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-10 18:19:23,344 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:19:23,344 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:19:23,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:19:23,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:23,346 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:19:23,346 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:23,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 25001746, now seen corresponding path program 1 times [2024-11-10 18:19:23,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:23,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912219466] [2024-11-10 18:19:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:23,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:23,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:23,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912219466] [2024-11-10 18:19:23,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912219466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:23,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:23,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:19:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878173137] [2024-11-10 18:19:23,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:23,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:19:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:23,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:19:23,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:19:23,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 74 [2024-11-10 18:19:23,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:23,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:23,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 74 [2024-11-10 18:19:23,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:24,044 INFO L124 PetriNetUnfolderBase]: 499/865 cut-off events. [2024-11-10 18:19:24,045 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-10 18:19:24,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 865 events. 499/865 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4339 event pairs, 358 based on Foata normal form. 142/867 useless extension candidates. Maximal degree in co-relation 1426. Up to 717 conditions per place. [2024-11-10 18:19:24,061 INFO L140 encePairwiseOnDemand]: 64/74 looper letters, 28 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-11-10 18:19:24,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 200 flow [2024-11-10 18:19:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:19:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:19:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2024-11-10 18:19:24,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6441441441441441 [2024-11-10 18:19:24,077 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 158 flow. Second operand 3 states and 143 transitions. [2024-11-10 18:19:24,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 200 flow [2024-11-10 18:19:24,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 188 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:19:24,092 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 132 flow [2024-11-10 18:19:24,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-11-10 18:19:24,099 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2024-11-10 18:19:24,100 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 132 flow [2024-11-10 18:19:24,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:24,101 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:24,101 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:19:24,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:19:24,102 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:24,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:24,102 INFO L85 PathProgramCache]: Analyzing trace with hash 25001747, now seen corresponding path program 1 times [2024-11-10 18:19:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:24,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110197174] [2024-11-10 18:19:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:24,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:24,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:24,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110197174] [2024-11-10 18:19:24,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110197174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:24,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:24,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:19:24,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762583834] [2024-11-10 18:19:24,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:24,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:19:24,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:24,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:19:24,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:19:24,474 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 74 [2024-11-10 18:19:24,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2024-11-10 18:19:24,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:24,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 74 [2024-11-10 18:19:24,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:24,704 INFO L124 PetriNetUnfolderBase]: 500/870 cut-off events. [2024-11-10 18:19:24,705 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-10 18:19:24,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1621 conditions, 870 events. 500/870 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4342 event pairs, 358 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 1586. Up to 726 conditions per place. [2024-11-10 18:19:24,714 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 31 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2024-11-10 18:19:24,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 208 flow [2024-11-10 18:19:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:19:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:19:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2024-11-10 18:19:24,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-11-10 18:19:24,719 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 132 flow. Second operand 4 states and 176 transitions. [2024-11-10 18:19:24,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 208 flow [2024-11-10 18:19:24,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:24,722 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 155 flow [2024-11-10 18:19:24,722 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-11-10 18:19:24,723 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, -5 predicate places. [2024-11-10 18:19:24,723 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 155 flow [2024-11-10 18:19:24,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2024-11-10 18:19:24,724 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:24,725 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:19:24,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:19:24,726 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:24,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1798514124, now seen corresponding path program 1 times [2024-11-10 18:19:24,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:24,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106347151] [2024-11-10 18:19:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:25,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:25,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106347151] [2024-11-10 18:19:25,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106347151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:25,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094867793] [2024-11-10 18:19:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:25,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:25,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:25,078 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) [2024-11-10 18:19:25,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:19:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:25,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:19:25,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:25,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-10 18:19:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:25,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:25,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094867793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:25,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:25,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:19:25,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410222681] [2024-11-10 18:19:25,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:25,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:19:25,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:25,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:19:25,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:19:25,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 74 [2024-11-10 18:19:25,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 155 flow. Second operand has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 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) [2024-11-10 18:19:25,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:25,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 74 [2024-11-10 18:19:25,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:26,482 INFO L124 PetriNetUnfolderBase]: 501/874 cut-off events. [2024-11-10 18:19:26,482 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-10 18:19:26,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1644 conditions, 874 events. 501/874 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4345 event pairs, 358 based on Foata normal form. 0/732 useless extension candidates. Maximal degree in co-relation 1607. Up to 723 conditions per place. [2024-11-10 18:19:26,490 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 29 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-11-10 18:19:26,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 249 flow [2024-11-10 18:19:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:19:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:19:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 340 transitions. [2024-11-10 18:19:26,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5105105105105106 [2024-11-10 18:19:26,494 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 155 flow. Second operand 9 states and 340 transitions. [2024-11-10 18:19:26,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 249 flow [2024-11-10 18:19:26,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:19:26,497 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 184 flow [2024-11-10 18:19:26,497 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=184, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-11-10 18:19:26,498 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 1 predicate places. [2024-11-10 18:19:26,498 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 184 flow [2024-11-10 18:19:26,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 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) [2024-11-10 18:19:26,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:26,499 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:26,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:26,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:26,705 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:26,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:26,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1798920343, now seen corresponding path program 1 times [2024-11-10 18:19:26,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:26,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960317993] [2024-11-10 18:19:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:26,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:26,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:26,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960317993] [2024-11-10 18:19:26,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960317993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:26,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:26,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:19:26,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873926166] [2024-11-10 18:19:26,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:26,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:19:26,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:26,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:19:26,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:19:26,855 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 74 [2024-11-10 18:19:26,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 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) [2024-11-10 18:19:26,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:26,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 74 [2024-11-10 18:19:26,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:27,067 INFO L124 PetriNetUnfolderBase]: 501/881 cut-off events. [2024-11-10 18:19:27,067 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-10 18:19:27,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1666 conditions, 881 events. 501/881 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4339 event pairs, 358 based on Foata normal form. 2/743 useless extension candidates. Maximal degree in co-relation 1618. Up to 728 conditions per place. [2024-11-10 18:19:27,075 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 34 selfloop transitions, 5 changer transitions 4/71 dead transitions. [2024-11-10 18:19:27,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 284 flow [2024-11-10 18:19:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:19:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:19:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-10 18:19:27,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6148648648648649 [2024-11-10 18:19:27,077 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 184 flow. Second operand 4 states and 182 transitions. [2024-11-10 18:19:27,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 284 flow [2024-11-10 18:19:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 244 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-10 18:19:27,081 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 172 flow [2024-11-10 18:19:27,081 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-11-10 18:19:27,082 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2024-11-10 18:19:27,082 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 172 flow [2024-11-10 18:19:27,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 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) [2024-11-10 18:19:27,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:27,083 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:27,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:19:27,084 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:27,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:27,085 INFO L85 PathProgramCache]: Analyzing trace with hash -181531842, now seen corresponding path program 1 times [2024-11-10 18:19:27,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:27,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462005035] [2024-11-10 18:19:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:27,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:27,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:27,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462005035] [2024-11-10 18:19:27,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462005035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:27,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419740164] [2024-11-10 18:19:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:27,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:27,323 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) [2024-11-10 18:19:27,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:19:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:27,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 18:19:27,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:27,409 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 [2024-11-10 18:19:27,533 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:19:27,534 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 [2024-11-10 18:19:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:27,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:27,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419740164] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:27,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:19:27,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-10 18:19:27,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833060838] [2024-11-10 18:19:27,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:27,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:19:27,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:19:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:19:27,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 74 [2024-11-10 18:19:27,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 36.2) internal successors, (181), 5 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) [2024-11-10 18:19:27,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:27,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 74 [2024-11-10 18:19:27,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:27,944 INFO L124 PetriNetUnfolderBase]: 500/875 cut-off events. [2024-11-10 18:19:27,944 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-10 18:19:27,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1647 conditions, 875 events. 500/875 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4351 event pairs, 358 based on Foata normal form. 1/736 useless extension candidates. Maximal degree in co-relation 1600. Up to 725 conditions per place. [2024-11-10 18:19:27,950 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 33 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2024-11-10 18:19:27,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 252 flow [2024-11-10 18:19:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:19:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:19:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-11-10 18:19:27,952 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5702702702702702 [2024-11-10 18:19:27,952 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 172 flow. Second operand 5 states and 211 transitions. [2024-11-10 18:19:27,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 252 flow [2024-11-10 18:19:27,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 241 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:27,956 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 178 flow [2024-11-10 18:19:27,956 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-11-10 18:19:27,956 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 1 predicate places. [2024-11-10 18:19:27,957 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 178 flow [2024-11-10 18:19:27,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 5 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) [2024-11-10 18:19:27,957 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:27,957 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:27,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:19:28,157 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 [2024-11-10 18:19:28,158 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:28,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:28,159 INFO L85 PathProgramCache]: Analyzing trace with hash -650508549, now seen corresponding path program 1 times [2024-11-10 18:19:28,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:28,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681505579] [2024-11-10 18:19:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:28,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:28,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681505579] [2024-11-10 18:19:28,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681505579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690480995] [2024-11-10 18:19:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:28,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:28,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:28,284 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) [2024-11-10 18:19:28,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:19:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:28,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 18:19:28,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:28,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:28,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690480995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:28,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:28,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:19:28,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868451992] [2024-11-10 18:19:28,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:28,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:19:28,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:19:28,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:19:28,657 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 74 [2024-11-10 18:19:28,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 178 flow. Second operand has 14 states, 14 states have (on average 36.642857142857146) internal successors, (513), 14 states have internal predecessors, (513), 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) [2024-11-10 18:19:28,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:28,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 74 [2024-11-10 18:19:28,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:29,049 INFO L124 PetriNetUnfolderBase]: 997/1739 cut-off events. [2024-11-10 18:19:29,050 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-10 18:19:29,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3264 conditions, 1739 events. 997/1739 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9792 event pairs, 716 based on Foata normal form. 1/1482 useless extension candidates. Maximal degree in co-relation 1612. Up to 721 conditions per place. [2024-11-10 18:19:29,061 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 52 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-11-10 18:19:29,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 99 transitions, 405 flow [2024-11-10 18:19:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:19:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:19:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 422 transitions. [2024-11-10 18:19:29,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5702702702702702 [2024-11-10 18:19:29,064 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 178 flow. Second operand 10 states and 422 transitions. [2024-11-10 18:19:29,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 99 transitions, 405 flow [2024-11-10 18:19:29,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 391 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:19:29,068 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 249 flow [2024-11-10 18:19:29,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=249, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-11-10 18:19:29,071 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2024-11-10 18:19:29,071 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 249 flow [2024-11-10 18:19:29,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.642857142857146) internal successors, (513), 14 states have internal predecessors, (513), 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) [2024-11-10 18:19:29,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:29,072 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:19:29,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:19:29,272 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 [2024-11-10 18:19:29,272 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:29,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:29,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1282285470, now seen corresponding path program 2 times [2024-11-10 18:19:29,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:29,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367018300] [2024-11-10 18:19:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:29,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:29,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:29,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367018300] [2024-11-10 18:19:29,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367018300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:29,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611838174] [2024-11-10 18:19:29,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:19:29,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:29,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:29,597 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) [2024-11-10 18:19:29,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:19:29,688 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:19:29,688 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:19:29,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:19:29,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:29,770 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 [2024-11-10 18:19:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:29,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:30,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611838174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:30,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:30,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2024-11-10 18:19:30,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099371341] [2024-11-10 18:19:30,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:30,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 18:19:30,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:30,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 18:19:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-10 18:19:30,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 74 [2024-11-10 18:19:30,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 249 flow. Second operand has 18 states, 18 states have (on average 34.611111111111114) internal successors, (623), 18 states have internal predecessors, (623), 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) [2024-11-10 18:19:30,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:30,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 74 [2024-11-10 18:19:30,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:31,598 INFO L124 PetriNetUnfolderBase]: 1496/2609 cut-off events. [2024-11-10 18:19:31,598 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-11-10 18:19:31,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4940 conditions, 2609 events. 1496/2609 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15415 event pairs, 1074 based on Foata normal form. 6/2217 useless extension candidates. Maximal degree in co-relation 1633. Up to 1433 conditions per place. [2024-11-10 18:19:31,619 INFO L140 encePairwiseOnDemand]: 64/74 looper letters, 54 selfloop transitions, 31 changer transitions 0/112 dead transitions. [2024-11-10 18:19:31,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 569 flow [2024-11-10 18:19:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 18:19:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 18:19:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 616 transitions. [2024-11-10 18:19:31,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5202702702702703 [2024-11-10 18:19:31,623 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 249 flow. Second operand 16 states and 616 transitions. [2024-11-10 18:19:31,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 569 flow [2024-11-10 18:19:31,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 529 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:31,630 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 389 flow [2024-11-10 18:19:31,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=389, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2024-11-10 18:19:31,631 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 24 predicate places. [2024-11-10 18:19:31,631 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 389 flow [2024-11-10 18:19:31,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 34.611111111111114) internal successors, (623), 18 states have internal predecessors, (623), 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) [2024-11-10 18:19:31,632 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:31,632 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:31,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:31,832 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 [2024-11-10 18:19:31,833 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:31,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:31,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1000939571, now seen corresponding path program 1 times [2024-11-10 18:19:31,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:31,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260042783] [2024-11-10 18:19:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:31,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:31,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:31,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260042783] [2024-11-10 18:19:31,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260042783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:31,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:31,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:19:31,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440971944] [2024-11-10 18:19:31,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:31,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:19:31,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:31,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:19:31,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:19:32,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 74 [2024-11-10 18:19:32,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 389 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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) [2024-11-10 18:19:32,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:32,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 74 [2024-11-10 18:19:32,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:32,505 INFO L124 PetriNetUnfolderBase]: 2714/4325 cut-off events. [2024-11-10 18:19:32,505 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-11-10 18:19:32,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8442 conditions, 4325 events. 2714/4325 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25796 event pairs, 2100 based on Foata normal form. 0/3959 useless extension candidates. Maximal degree in co-relation 5647. Up to 3877 conditions per place. [2024-11-10 18:19:32,547 INFO L140 encePairwiseOnDemand]: 68/74 looper letters, 48 selfloop transitions, 8 changer transitions 0/84 dead transitions. [2024-11-10 18:19:32,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 84 transitions, 495 flow [2024-11-10 18:19:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:19:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:19:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-11-10 18:19:32,622 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4891891891891892 [2024-11-10 18:19:32,622 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 389 flow. Second operand 5 states and 181 transitions. [2024-11-10 18:19:32,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 84 transitions, 495 flow [2024-11-10 18:19:32,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 84 transitions, 478 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:32,626 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 382 flow [2024-11-10 18:19:32,626 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=382, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2024-11-10 18:19:32,627 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2024-11-10 18:19:32,627 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 382 flow [2024-11-10 18:19:32,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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) [2024-11-10 18:19:32,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:32,628 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:32,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:19:32,628 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:32,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1000939570, now seen corresponding path program 1 times [2024-11-10 18:19:32,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:32,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803129876] [2024-11-10 18:19:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:32,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:32,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:32,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803129876] [2024-11-10 18:19:32,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803129876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:32,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367610809] [2024-11-10 18:19:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:32,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:32,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:32,801 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) [2024-11-10 18:19:32,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:19:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:32,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-10 18:19:32,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:32,896 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 [2024-11-10 18:19:32,901 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 [2024-11-10 18:19:32,997 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:19:32,998 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 31 treesize of output 28 [2024-11-10 18:19:33,023 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:19:33,024 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 [2024-11-10 18:19:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:33,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:33,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367610809] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:33,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:19:33,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-10 18:19:33,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025727786] [2024-11-10 18:19:33,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:33,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:19:33,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:19:33,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:19:33,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 74 [2024-11-10 18:19:33,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 382 flow. Second operand has 6 states, 6 states have (on average 36.666666666666664) internal successors, (220), 6 states have internal predecessors, (220), 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) [2024-11-10 18:19:33,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:33,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 74 [2024-11-10 18:19:33,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:34,712 INFO L124 PetriNetUnfolderBase]: 3005/5636 cut-off events. [2024-11-10 18:19:34,712 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-11-10 18:19:34,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10114 conditions, 5636 events. 3005/5636 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 41349 event pairs, 1449 based on Foata normal form. 0/4586 useless extension candidates. Maximal degree in co-relation 6760. Up to 2776 conditions per place. [2024-11-10 18:19:34,764 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 58 selfloop transitions, 15 changer transitions 0/102 dead transitions. [2024-11-10 18:19:34,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 102 transitions, 574 flow [2024-11-10 18:19:34,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:19:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:19:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 297 transitions. [2024-11-10 18:19:34,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5733590733590733 [2024-11-10 18:19:34,766 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 382 flow. Second operand 7 states and 297 transitions. [2024-11-10 18:19:34,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 102 transitions, 574 flow [2024-11-10 18:19:34,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 102 transitions, 558 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 18:19:34,770 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 420 flow [2024-11-10 18:19:34,770 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2024-11-10 18:19:34,772 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 28 predicate places. [2024-11-10 18:19:34,772 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 420 flow [2024-11-10 18:19:34,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.666666666666664) internal successors, (220), 6 states have internal predecessors, (220), 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) [2024-11-10 18:19:34,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:34,772 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:34,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:34,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:34,977 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:34,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:34,977 INFO L85 PathProgramCache]: Analyzing trace with hash -964354852, now seen corresponding path program 1 times [2024-11-10 18:19:34,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:34,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93763694] [2024-11-10 18:19:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:34,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:35,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:35,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93763694] [2024-11-10 18:19:35,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93763694] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:35,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:35,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:19:35,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857370035] [2024-11-10 18:19:35,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:35,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:19:35,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:19:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:19:35,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 74 [2024-11-10 18:19:35,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 420 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-11-10 18:19:35,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:35,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 74 [2024-11-10 18:19:35,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:35,442 INFO L124 PetriNetUnfolderBase]: 1943/3248 cut-off events. [2024-11-10 18:19:35,442 INFO L125 PetriNetUnfolderBase]: For 2309/2804 co-relation queries the response was YES. [2024-11-10 18:19:35,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7583 conditions, 3248 events. 1943/3248 cut-off events. For 2309/2804 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19987 event pairs, 1449 based on Foata normal form. 171/3008 useless extension candidates. Maximal degree in co-relation 5071. Up to 2776 conditions per place. [2024-11-10 18:19:35,469 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 49 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2024-11-10 18:19:35,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 522 flow [2024-11-10 18:19:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:19:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:19:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2024-11-10 18:19:35,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.543918918918919 [2024-11-10 18:19:35,471 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 420 flow. Second operand 4 states and 161 transitions. [2024-11-10 18:19:35,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 522 flow [2024-11-10 18:19:35,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 83 transitions, 504 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:19:35,476 INFO L231 Difference]: Finished difference. Result has 94 places, 83 transitions, 406 flow [2024-11-10 18:19:35,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=94, PETRI_TRANSITIONS=83} [2024-11-10 18:19:35,477 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 24 predicate places. [2024-11-10 18:19:35,477 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 83 transitions, 406 flow [2024-11-10 18:19:35,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-11-10 18:19:35,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:35,478 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:35,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:19:35,478 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:35,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:35,479 INFO L85 PathProgramCache]: Analyzing trace with hash -964354851, now seen corresponding path program 1 times [2024-11-10 18:19:35,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:35,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558702086] [2024-11-10 18:19:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:35,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:35,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:35,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558702086] [2024-11-10 18:19:35,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558702086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:35,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358445946] [2024-11-10 18:19:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:35,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:35,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:35,686 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) [2024-11-10 18:19:35,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:19:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:35,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:19:35,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:35,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:35,910 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 [2024-11-10 18:19:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:35,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358445946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:35,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:35,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-10 18:19:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818092789] [2024-11-10 18:19:35,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:35,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:19:35,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:35,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:19:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:19:36,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2024-11-10 18:19:36,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 83 transitions, 406 flow. Second operand has 11 states, 11 states have (on average 37.72727272727273) internal successors, (415), 11 states have internal predecessors, (415), 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) [2024-11-10 18:19:36,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:36,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2024-11-10 18:19:36,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:36,720 INFO L124 PetriNetUnfolderBase]: 2564/4349 cut-off events. [2024-11-10 18:19:36,720 INFO L125 PetriNetUnfolderBase]: For 2396/2792 co-relation queries the response was YES. [2024-11-10 18:19:36,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10011 conditions, 4349 events. 2564/4349 cut-off events. For 2396/2792 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 27622 event pairs, 921 based on Foata normal form. 240/3872 useless extension candidates. Maximal degree in co-relation 6688. Up to 2962 conditions per place. [2024-11-10 18:19:36,758 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 57 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2024-11-10 18:19:36,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 100 transitions, 596 flow [2024-11-10 18:19:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:19:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:19:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 269 transitions. [2024-11-10 18:19:36,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6058558558558559 [2024-11-10 18:19:36,760 INFO L175 Difference]: Start difference. First operand has 94 places, 83 transitions, 406 flow. Second operand 6 states and 269 transitions. [2024-11-10 18:19:36,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 100 transitions, 596 flow [2024-11-10 18:19:36,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 100 transitions, 590 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:36,765 INFO L231 Difference]: Finished difference. Result has 98 places, 84 transitions, 443 flow [2024-11-10 18:19:36,765 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=443, PETRI_PLACES=98, PETRI_TRANSITIONS=84} [2024-11-10 18:19:36,766 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 28 predicate places. [2024-11-10 18:19:36,766 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 84 transitions, 443 flow [2024-11-10 18:19:36,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 37.72727272727273) internal successors, (415), 11 states have internal predecessors, (415), 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) [2024-11-10 18:19:36,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:36,767 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:36,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:36,967 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 [2024-11-10 18:19:36,968 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:36,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash 38876769, now seen corresponding path program 1 times [2024-11-10 18:19:36,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:36,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353473436] [2024-11-10 18:19:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:36,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:37,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:37,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353473436] [2024-11-10 18:19:37,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353473436] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:37,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104774589] [2024-11-10 18:19:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:37,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:37,104 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) [2024-11-10 18:19:37,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:19:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:37,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:19:37,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:37,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104774589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:37,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:37,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:19:37,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644003419] [2024-11-10 18:19:37,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:37,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:19:37,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:19:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:19:37,481 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 74 [2024-11-10 18:19:37,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 84 transitions, 443 flow. Second operand has 14 states, 14 states have (on average 35.142857142857146) internal successors, (492), 14 states have internal predecessors, (492), 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) [2024-11-10 18:19:37,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:37,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 74 [2024-11-10 18:19:37,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:38,090 INFO L124 PetriNetUnfolderBase]: 2484/3967 cut-off events. [2024-11-10 18:19:38,090 INFO L125 PetriNetUnfolderBase]: For 7070/7882 co-relation queries the response was YES. [2024-11-10 18:19:38,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11072 conditions, 3967 events. 2484/3967 cut-off events. For 7070/7882 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 23531 event pairs, 1344 based on Foata normal form. 0/3552 useless extension candidates. Maximal degree in co-relation 6783. Up to 2370 conditions per place. [2024-11-10 18:19:38,132 INFO L140 encePairwiseOnDemand]: 61/74 looper letters, 88 selfloop transitions, 29 changer transitions 0/137 dead transitions. [2024-11-10 18:19:38,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 137 transitions, 889 flow [2024-11-10 18:19:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:19:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:19:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 425 transitions. [2024-11-10 18:19:38,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5743243243243243 [2024-11-10 18:19:38,134 INFO L175 Difference]: Start difference. First operand has 98 places, 84 transitions, 443 flow. Second operand 10 states and 425 transitions. [2024-11-10 18:19:38,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 137 transitions, 889 flow [2024-11-10 18:19:38,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 137 transitions, 836 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 18:19:38,142 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 505 flow [2024-11-10 18:19:38,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=505, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2024-11-10 18:19:38,143 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 35 predicate places. [2024-11-10 18:19:38,143 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 505 flow [2024-11-10 18:19:38,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.142857142857146) internal successors, (492), 14 states have internal predecessors, (492), 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) [2024-11-10 18:19:38,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:38,143 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:38,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:38,343 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 [2024-11-10 18:19:38,344 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:38,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2010451782, now seen corresponding path program 1 times [2024-11-10 18:19:38,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:38,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853967537] [2024-11-10 18:19:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:38,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:38,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:38,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853967537] [2024-11-10 18:19:38,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853967537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:38,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:38,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:19:38,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110287494] [2024-11-10 18:19:38,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:38,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 18:19:38,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:38,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 18:19:38,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-10 18:19:39,032 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 74 [2024-11-10 18:19:39,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 505 flow. Second operand has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 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) [2024-11-10 18:19:39,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:39,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 74 [2024-11-10 18:19:39,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:39,712 INFO L124 PetriNetUnfolderBase]: 3444/5881 cut-off events. [2024-11-10 18:19:39,712 INFO L125 PetriNetUnfolderBase]: For 5857/6932 co-relation queries the response was YES. [2024-11-10 18:19:39,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15532 conditions, 5881 events. 3444/5881 cut-off events. For 5857/6932 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39498 event pairs, 1239 based on Foata normal form. 0/5514 useless extension candidates. Maximal degree in co-relation 9557. Up to 2527 conditions per place. [2024-11-10 18:19:39,758 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 73 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2024-11-10 18:19:39,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 105 transitions, 748 flow [2024-11-10 18:19:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:19:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:19:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-10 18:19:39,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5180180180180181 [2024-11-10 18:19:39,760 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 505 flow. Second operand 6 states and 230 transitions. [2024-11-10 18:19:39,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 105 transitions, 748 flow [2024-11-10 18:19:39,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 716 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 18:19:39,768 INFO L231 Difference]: Finished difference. Result has 107 places, 89 transitions, 519 flow [2024-11-10 18:19:39,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=519, PETRI_PLACES=107, PETRI_TRANSITIONS=89} [2024-11-10 18:19:39,769 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 37 predicate places. [2024-11-10 18:19:39,769 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 89 transitions, 519 flow [2024-11-10 18:19:39,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 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) [2024-11-10 18:19:39,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:39,770 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:39,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:19:39,770 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:39,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash -58298906, now seen corresponding path program 1 times [2024-11-10 18:19:39,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:39,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815676727] [2024-11-10 18:19:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:39,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:39,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:39,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815676727] [2024-11-10 18:19:39,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815676727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:39,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552881656] [2024-11-10 18:19:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:39,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:39,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:39,890 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) [2024-11-10 18:19:39,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:19:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:39,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:19:39,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:40,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:40,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552881656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:40,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:40,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:19:40,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942346167] [2024-11-10 18:19:40,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:40,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:19:40,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:40,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:19:40,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:19:40,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 74 [2024-11-10 18:19:40,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 89 transitions, 519 flow. Second operand has 14 states, 14 states have (on average 35.07142857142857) internal successors, (491), 14 states have internal predecessors, (491), 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) [2024-11-10 18:19:40,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:40,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 74 [2024-11-10 18:19:40,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:41,019 INFO L124 PetriNetUnfolderBase]: 3904/6871 cut-off events. [2024-11-10 18:19:41,020 INFO L125 PetriNetUnfolderBase]: For 5823/6167 co-relation queries the response was YES. [2024-11-10 18:19:41,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17775 conditions, 6871 events. 3904/6871 cut-off events. For 5823/6167 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 47040 event pairs, 1893 based on Foata normal form. 6/6058 useless extension candidates. Maximal degree in co-relation 10753. Up to 3382 conditions per place. [2024-11-10 18:19:41,073 INFO L140 encePairwiseOnDemand]: 60/74 looper letters, 114 selfloop transitions, 33 changer transitions 0/169 dead transitions. [2024-11-10 18:19:41,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 169 transitions, 1112 flow [2024-11-10 18:19:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:19:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:19:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 521 transitions. [2024-11-10 18:19:41,076 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5867117117117117 [2024-11-10 18:19:41,076 INFO L175 Difference]: Start difference. First operand has 107 places, 89 transitions, 519 flow. Second operand 12 states and 521 transitions. [2024-11-10 18:19:41,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 169 transitions, 1112 flow [2024-11-10 18:19:41,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 1100 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:19:41,092 INFO L231 Difference]: Finished difference. Result has 118 places, 95 transitions, 620 flow [2024-11-10 18:19:41,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=620, PETRI_PLACES=118, PETRI_TRANSITIONS=95} [2024-11-10 18:19:41,093 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 48 predicate places. [2024-11-10 18:19:41,093 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 95 transitions, 620 flow [2024-11-10 18:19:41,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.07142857142857) internal successors, (491), 14 states have internal predecessors, (491), 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) [2024-11-10 18:19:41,094 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:41,094 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:41,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 18:19:41,294 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 [2024-11-10 18:19:41,295 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:41,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:41,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2100504971, now seen corresponding path program 1 times [2024-11-10 18:19:41,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:41,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304218266] [2024-11-10 18:19:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:41,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304218266] [2024-11-10 18:19:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304218266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32115923] [2024-11-10 18:19:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:41,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:41,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:41,599 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) [2024-11-10 18:19:41,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:19:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:41,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:19:41,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:41,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:42,014 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 [2024-11-10 18:19:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:42,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32115923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:42,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:42,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-10 18:19:42,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948945313] [2024-11-10 18:19:42,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:42,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 18:19:42,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:42,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 18:19:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-11-10 18:19:43,030 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 74 [2024-11-10 18:19:43,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 95 transitions, 620 flow. Second operand has 22 states, 22 states have (on average 35.18181818181818) internal successors, (774), 22 states have internal predecessors, (774), 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) [2024-11-10 18:19:43,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:43,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 74 [2024-11-10 18:19:43,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:44,115 INFO L124 PetriNetUnfolderBase]: 3222/5274 cut-off events. [2024-11-10 18:19:44,116 INFO L125 PetriNetUnfolderBase]: For 11120/12259 co-relation queries the response was YES. [2024-11-10 18:19:44,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16691 conditions, 5274 events. 3222/5274 cut-off events. For 11120/12259 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 33738 event pairs, 1239 based on Foata normal form. 73/5068 useless extension candidates. Maximal degree in co-relation 10649. Up to 1974 conditions per place. [2024-11-10 18:19:44,155 INFO L140 encePairwiseOnDemand]: 59/74 looper letters, 110 selfloop transitions, 38 changer transitions 0/172 dead transitions. [2024-11-10 18:19:44,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 172 transitions, 1309 flow [2024-11-10 18:19:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 18:19:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 18:19:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 688 transitions. [2024-11-10 18:19:44,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5468998410174881 [2024-11-10 18:19:44,160 INFO L175 Difference]: Start difference. First operand has 118 places, 95 transitions, 620 flow. Second operand 17 states and 688 transitions. [2024-11-10 18:19:44,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 172 transitions, 1309 flow [2024-11-10 18:19:44,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 172 transitions, 1267 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-10 18:19:44,174 INFO L231 Difference]: Finished difference. Result has 134 places, 103 transitions, 730 flow [2024-11-10 18:19:44,174 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=730, PETRI_PLACES=134, PETRI_TRANSITIONS=103} [2024-11-10 18:19:44,174 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 64 predicate places. [2024-11-10 18:19:44,175 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 103 transitions, 730 flow [2024-11-10 18:19:44,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.18181818181818) internal successors, (774), 22 states have internal predecessors, (774), 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) [2024-11-10 18:19:44,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:44,175 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:44,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 18:19:44,376 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,SelfDestructingSolverStorable14 [2024-11-10 18:19:44,376 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:44,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1713901947, now seen corresponding path program 2 times [2024-11-10 18:19:44,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:44,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033176653] [2024-11-10 18:19:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:44,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:44,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:44,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033176653] [2024-11-10 18:19:44,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033176653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:44,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366142672] [2024-11-10 18:19:44,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:19:44,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:44,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:44,718 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) [2024-11-10 18:19:44,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:19:44,815 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:19:44,816 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:19:44,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 18:19:44,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:44,835 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 [2024-11-10 18:19:44,845 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 [2024-11-10 18:19:44,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:19:44,935 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 [2024-11-10 18:19:44,941 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:19:44,942 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 [2024-11-10 18:19:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-10 18:19:45,144 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:19:45,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366142672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:45,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:19:45,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-10 18:19:45,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924239470] [2024-11-10 18:19:45,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:45,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:19:45,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:45,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:19:45,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:19:45,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 74 [2024-11-10 18:19:45,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 103 transitions, 730 flow. Second operand has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 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) [2024-11-10 18:19:45,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:45,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 74 [2024-11-10 18:19:45,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:46,258 INFO L124 PetriNetUnfolderBase]: 4498/8220 cut-off events. [2024-11-10 18:19:46,258 INFO L125 PetriNetUnfolderBase]: For 20603/22116 co-relation queries the response was YES. [2024-11-10 18:19:46,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26949 conditions, 8220 events. 4498/8220 cut-off events. For 20603/22116 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 60579 event pairs, 1946 based on Foata normal form. 179/8151 useless extension candidates. Maximal degree in co-relation 19005. Up to 4014 conditions per place. [2024-11-10 18:19:46,325 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 103 selfloop transitions, 14 changer transitions 0/149 dead transitions. [2024-11-10 18:19:46,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 149 transitions, 1255 flow [2024-11-10 18:19:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:19:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:19:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 293 transitions. [2024-11-10 18:19:46,327 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5656370656370656 [2024-11-10 18:19:46,328 INFO L175 Difference]: Start difference. First operand has 134 places, 103 transitions, 730 flow. Second operand 7 states and 293 transitions. [2024-11-10 18:19:46,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 149 transitions, 1255 flow [2024-11-10 18:19:46,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 149 transitions, 1187 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-10 18:19:46,359 INFO L231 Difference]: Finished difference. Result has 133 places, 106 transitions, 726 flow [2024-11-10 18:19:46,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=133, PETRI_TRANSITIONS=106} [2024-11-10 18:19:46,361 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 63 predicate places. [2024-11-10 18:19:46,361 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 106 transitions, 726 flow [2024-11-10 18:19:46,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 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) [2024-11-10 18:19:46,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:46,362 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:46,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:46,566 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,SelfDestructingSolverStorable15 [2024-11-10 18:19:46,567 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:46,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1591352046, now seen corresponding path program 1 times [2024-11-10 18:19:46,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:46,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966845222] [2024-11-10 18:19:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:46,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:46,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966845222] [2024-11-10 18:19:46,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966845222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421575122] [2024-11-10 18:19:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:46,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:46,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:46,809 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) [2024-11-10 18:19:46,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:19:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:46,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 18:19:46,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:47,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:47,085 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 [2024-11-10 18:19:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:47,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421575122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:47,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:47,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-10 18:19:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423919134] [2024-11-10 18:19:47,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:47,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 18:19:47,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:47,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 18:19:47,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-10 18:19:47,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2024-11-10 18:19:47,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 106 transitions, 726 flow. Second operand has 16 states, 16 states have (on average 38.1875) internal successors, (611), 16 states have internal predecessors, (611), 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) [2024-11-10 18:19:47,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:47,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2024-11-10 18:19:47,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:48,587 INFO L124 PetriNetUnfolderBase]: 4280/8094 cut-off events. [2024-11-10 18:19:48,588 INFO L125 PetriNetUnfolderBase]: For 20074/21749 co-relation queries the response was YES. [2024-11-10 18:19:48,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27199 conditions, 8094 events. 4280/8094 cut-off events. For 20074/21749 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 60284 event pairs, 1156 based on Foata normal form. 127/7869 useless extension candidates. Maximal degree in co-relation 19037. Up to 2058 conditions per place. [2024-11-10 18:19:48,653 INFO L140 encePairwiseOnDemand]: 64/74 looper letters, 115 selfloop transitions, 23 changer transitions 0/172 dead transitions. [2024-11-10 18:19:48,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 172 transitions, 1349 flow [2024-11-10 18:19:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:19:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:19:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 465 transitions. [2024-11-10 18:19:48,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6283783783783784 [2024-11-10 18:19:48,655 INFO L175 Difference]: Start difference. First operand has 133 places, 106 transitions, 726 flow. Second operand 10 states and 465 transitions. [2024-11-10 18:19:48,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 172 transitions, 1349 flow [2024-11-10 18:19:48,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 172 transitions, 1326 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-10 18:19:48,691 INFO L231 Difference]: Finished difference. Result has 141 places, 108 transitions, 780 flow [2024-11-10 18:19:48,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=780, PETRI_PLACES=141, PETRI_TRANSITIONS=108} [2024-11-10 18:19:48,692 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 71 predicate places. [2024-11-10 18:19:48,692 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 108 transitions, 780 flow [2024-11-10 18:19:48,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 38.1875) internal successors, (611), 16 states have internal predecessors, (611), 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) [2024-11-10 18:19:48,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:48,692 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:48,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 18:19:48,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-10 18:19:48,897 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:48,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:48,897 INFO L85 PathProgramCache]: Analyzing trace with hash -851464950, now seen corresponding path program 2 times [2024-11-10 18:19:48,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:48,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038370081] [2024-11-10 18:19:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:48,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:49,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:49,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038370081] [2024-11-10 18:19:49,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038370081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:49,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031807487] [2024-11-10 18:19:49,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:19:49,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:49,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:49,176 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) [2024-11-10 18:19:49,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 18:19:49,273 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:19:49,273 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:19:49,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-10 18:19:49,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:49,287 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 [2024-11-10 18:19:49,297 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 [2024-11-10 18:19:49,416 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:19:49,417 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 31 treesize of output 28 [2024-11-10 18:19:49,446 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:19:49,446 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 [2024-11-10 18:19:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:49,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031807487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:50,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:50,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2024-11-10 18:19:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895824539] [2024-11-10 18:19:50,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:50,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 18:19:50,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 18:19:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-11-10 18:19:51,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 74 [2024-11-10 18:19:51,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 108 transitions, 780 flow. Second operand has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 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) [2024-11-10 18:19:51,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:51,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 74 [2024-11-10 18:19:51,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:54,684 INFO L124 PetriNetUnfolderBase]: 8562/16629 cut-off events. [2024-11-10 18:19:54,685 INFO L125 PetriNetUnfolderBase]: For 43470/44575 co-relation queries the response was YES. [2024-11-10 18:19:54,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56186 conditions, 16629 events. 8562/16629 cut-off events. For 43470/44575 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 142169 event pairs, 2866 based on Foata normal form. 502/16799 useless extension candidates. Maximal degree in co-relation 38855. Up to 4768 conditions per place. [2024-11-10 18:19:54,859 INFO L140 encePairwiseOnDemand]: 64/74 looper letters, 199 selfloop transitions, 28 changer transitions 0/259 dead transitions. [2024-11-10 18:19:54,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 259 transitions, 2064 flow [2024-11-10 18:19:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 18:19:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-10 18:19:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 734 transitions. [2024-11-10 18:19:54,861 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.551051051051051 [2024-11-10 18:19:54,861 INFO L175 Difference]: Start difference. First operand has 141 places, 108 transitions, 780 flow. Second operand 18 states and 734 transitions. [2024-11-10 18:19:54,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 259 transitions, 2064 flow [2024-11-10 18:19:54,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 259 transitions, 1996 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-10 18:19:54,939 INFO L231 Difference]: Finished difference. Result has 157 places, 116 transitions, 896 flow [2024-11-10 18:19:54,939 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=896, PETRI_PLACES=157, PETRI_TRANSITIONS=116} [2024-11-10 18:19:54,940 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 87 predicate places. [2024-11-10 18:19:54,940 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 116 transitions, 896 flow [2024-11-10 18:19:54,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 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) [2024-11-10 18:19:54,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:54,941 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:54,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-10 18:19:55,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 18:19:55,146 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:55,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash -538887663, now seen corresponding path program 1 times [2024-11-10 18:19:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:55,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218943115] [2024-11-10 18:19:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:55,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:55,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218943115] [2024-11-10 18:19:55,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218943115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:55,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146679967] [2024-11-10 18:19:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:55,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:55,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:55,294 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) [2024-11-10 18:19:55,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 18:19:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:55,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:19:55,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:55,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:55,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146679967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:55,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:55,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-10 18:19:55,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922918690] [2024-11-10 18:19:55,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:55,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 18:19:55,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:55,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 18:19:55,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-10 18:19:55,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 74 [2024-11-10 18:19:55,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 116 transitions, 896 flow. Second operand has 15 states, 15 states have (on average 35.666666666666664) internal successors, (535), 15 states have internal predecessors, (535), 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) [2024-11-10 18:19:55,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:55,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 74 [2024-11-10 18:19:55,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:57,981 INFO L124 PetriNetUnfolderBase]: 7948/13855 cut-off events. [2024-11-10 18:19:57,981 INFO L125 PetriNetUnfolderBase]: For 63920/67776 co-relation queries the response was YES. [2024-11-10 18:19:58,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54265 conditions, 13855 events. 7948/13855 cut-off events. For 63920/67776 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 105658 event pairs, 3900 based on Foata normal form. 276/13971 useless extension candidates. Maximal degree in co-relation 52286. Up to 7354 conditions per place. [2024-11-10 18:19:58,110 INFO L140 encePairwiseOnDemand]: 60/74 looper letters, 115 selfloop transitions, 33 changer transitions 0/175 dead transitions. [2024-11-10 18:19:58,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 175 transitions, 1627 flow [2024-11-10 18:19:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 18:19:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 18:19:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 463 transitions. [2024-11-10 18:19:58,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5687960687960688 [2024-11-10 18:19:58,112 INFO L175 Difference]: Start difference. First operand has 157 places, 116 transitions, 896 flow. Second operand 11 states and 463 transitions. [2024-11-10 18:19:58,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 175 transitions, 1627 flow [2024-11-10 18:19:58,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 175 transitions, 1530 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-11-10 18:19:58,155 INFO L231 Difference]: Finished difference. Result has 157 places, 116 transitions, 928 flow [2024-11-10 18:19:58,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=928, PETRI_PLACES=157, PETRI_TRANSITIONS=116} [2024-11-10 18:19:58,155 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 87 predicate places. [2024-11-10 18:19:58,155 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 116 transitions, 928 flow [2024-11-10 18:19:58,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 35.666666666666664) internal successors, (535), 15 states have internal predecessors, (535), 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) [2024-11-10 18:19:58,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:58,156 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:58,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-10 18:19:58,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:58,357 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:58,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:58,357 INFO L85 PathProgramCache]: Analyzing trace with hash -625608927, now seen corresponding path program 1 times [2024-11-10 18:19:58,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:58,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186527197] [2024-11-10 18:19:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:58,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:19:58,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186527197] [2024-11-10 18:19:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186527197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801837252] [2024-11-10 18:19:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:58,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:58,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:58,700 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) [2024-11-10 18:19:58,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 18:19:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:58,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 18:19:58,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:59,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:59,107 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 [2024-11-10 18:19:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:59,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801837252] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:59,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:59,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2024-11-10 18:19:59,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346461365] [2024-11-10 18:19:59,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:59,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-10 18:19:59,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-10 18:19:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-11-10 18:19:59,982 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 74 [2024-11-10 18:19:59,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 116 transitions, 928 flow. Second operand has 24 states, 24 states have (on average 35.0) internal successors, (840), 24 states have internal predecessors, (840), 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) [2024-11-10 18:19:59,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:59,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 74 [2024-11-10 18:19:59,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:02,775 INFO L124 PetriNetUnfolderBase]: 8210/16145 cut-off events. [2024-11-10 18:20:02,775 INFO L125 PetriNetUnfolderBase]: For 48161/49129 co-relation queries the response was YES. [2024-11-10 18:20:02,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57343 conditions, 16145 events. 8210/16145 cut-off events. For 48161/49129 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 137128 event pairs, 3359 based on Foata normal form. 486/16180 useless extension candidates. Maximal degree in co-relation 55829. Up to 6098 conditions per place. [2024-11-10 18:20:02,939 INFO L140 encePairwiseOnDemand]: 63/74 looper letters, 137 selfloop transitions, 26 changer transitions 0/192 dead transitions. [2024-11-10 18:20:02,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 192 transitions, 1718 flow [2024-11-10 18:20:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:20:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:20:02,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 503 transitions. [2024-11-10 18:20:02,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5664414414414415 [2024-11-10 18:20:02,941 INFO L175 Difference]: Start difference. First operand has 157 places, 116 transitions, 928 flow. Second operand 12 states and 503 transitions. [2024-11-10 18:20:02,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 192 transitions, 1718 flow [2024-11-10 18:20:03,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 192 transitions, 1675 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-10 18:20:03,021 INFO L231 Difference]: Finished difference. Result has 163 places, 116 transitions, 950 flow [2024-11-10 18:20:03,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=950, PETRI_PLACES=163, PETRI_TRANSITIONS=116} [2024-11-10 18:20:03,022 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 93 predicate places. [2024-11-10 18:20:03,022 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 116 transitions, 950 flow [2024-11-10 18:20:03,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 35.0) internal successors, (840), 24 states have internal predecessors, (840), 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) [2024-11-10 18:20:03,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:03,023 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:03,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-10 18:20:03,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:03,223 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:03,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1651622622, now seen corresponding path program 3 times [2024-11-10 18:20:03,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:03,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395407867] [2024-11-10 18:20:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:03,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:03,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:03,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395407867] [2024-11-10 18:20:03,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395407867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:03,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207779899] [2024-11-10 18:20:03,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:20:03,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:03,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:03,373 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) [2024-11-10 18:20:03,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-10 18:20:03,464 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:20:03,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:03,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 18:20:03,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:03,474 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 [2024-11-10 18:20:03,549 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:03,550 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 [2024-11-10 18:20:03,555 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 [2024-11-10 18:20:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-10 18:20:03,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:04,166 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 42 treesize of output 38 [2024-11-10 18:20:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-10 18:20:04,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207779899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:04,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:04,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2024-11-10 18:20:04,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112099822] [2024-11-10 18:20:04,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:04,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-10 18:20:04,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:04,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-10 18:20:04,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-10 18:20:05,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 74 [2024-11-10 18:20:05,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 116 transitions, 950 flow. Second operand has 24 states, 24 states have (on average 29.458333333333332) internal successors, (707), 24 states have internal predecessors, (707), 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) [2024-11-10 18:20:05,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:05,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 74 [2024-11-10 18:20:05,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:10,085 INFO L124 PetriNetUnfolderBase]: 18308/28892 cut-off events. [2024-11-10 18:20:10,086 INFO L125 PetriNetUnfolderBase]: For 88792/91170 co-relation queries the response was YES. [2024-11-10 18:20:10,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107103 conditions, 28892 events. 18308/28892 cut-off events. For 88792/91170 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 211505 event pairs, 3372 based on Foata normal form. 893/29584 useless extension candidates. Maximal degree in co-relation 104779. Up to 3787 conditions per place. [2024-11-10 18:20:10,460 INFO L140 encePairwiseOnDemand]: 59/74 looper letters, 381 selfloop transitions, 55 changer transitions 0/455 dead transitions. [2024-11-10 18:20:10,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 455 transitions, 3873 flow [2024-11-10 18:20:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-10 18:20:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-10 18:20:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1075 transitions. [2024-11-10 18:20:10,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5009319664492078 [2024-11-10 18:20:10,463 INFO L175 Difference]: Start difference. First operand has 163 places, 116 transitions, 950 flow. Second operand 29 states and 1075 transitions. [2024-11-10 18:20:10,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 455 transitions, 3873 flow [2024-11-10 18:20:10,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 455 transitions, 3822 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-10 18:20:10,790 INFO L231 Difference]: Finished difference. Result has 186 places, 129 transitions, 1154 flow [2024-11-10 18:20:10,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1154, PETRI_PLACES=186, PETRI_TRANSITIONS=129} [2024-11-10 18:20:10,791 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 116 predicate places. [2024-11-10 18:20:10,791 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 129 transitions, 1154 flow [2024-11-10 18:20:10,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 29.458333333333332) internal successors, (707), 24 states have internal predecessors, (707), 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) [2024-11-10 18:20:10,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:10,792 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:10,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-10 18:20:10,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:10,996 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:10,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1660796508, now seen corresponding path program 1 times [2024-11-10 18:20:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:10,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958009884] [2024-11-10 18:20:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:11,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:11,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958009884] [2024-11-10 18:20:11,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958009884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:11,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268357242] [2024-11-10 18:20:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:11,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:11,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:11,144 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) [2024-11-10 18:20:11,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-10 18:20:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:11,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 18:20:11,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:11,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:11,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268357242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:11,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:11,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-10 18:20:11,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165147987] [2024-11-10 18:20:11,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:11,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 18:20:11,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 18:20:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-10 18:20:11,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 74 [2024-11-10 18:20:11,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 129 transitions, 1154 flow. Second operand has 19 states, 19 states have (on average 35.473684210526315) internal successors, (674), 19 states have internal predecessors, (674), 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) [2024-11-10 18:20:11,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:11,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 74 [2024-11-10 18:20:11,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:13,325 INFO L124 PetriNetUnfolderBase]: 6552/11337 cut-off events. [2024-11-10 18:20:13,325 INFO L125 PetriNetUnfolderBase]: For 66536/69546 co-relation queries the response was YES. [2024-11-10 18:20:13,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49208 conditions, 11337 events. 6552/11337 cut-off events. For 66536/69546 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 82358 event pairs, 2430 based on Foata normal form. 76/11173 useless extension candidates. Maximal degree in co-relation 46870. Up to 3764 conditions per place. [2024-11-10 18:20:13,446 INFO L140 encePairwiseOnDemand]: 60/74 looper letters, 178 selfloop transitions, 38 changer transitions 0/249 dead transitions. [2024-11-10 18:20:13,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 249 transitions, 2588 flow [2024-11-10 18:20:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 18:20:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 18:20:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 599 transitions. [2024-11-10 18:20:13,448 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5781853281853282 [2024-11-10 18:20:13,448 INFO L175 Difference]: Start difference. First operand has 186 places, 129 transitions, 1154 flow. Second operand 14 states and 599 transitions. [2024-11-10 18:20:13,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 249 transitions, 2588 flow [2024-11-10 18:20:13,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 249 transitions, 2515 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-11-10 18:20:13,508 INFO L231 Difference]: Finished difference. Result has 193 places, 135 transitions, 1244 flow [2024-11-10 18:20:13,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1244, PETRI_PLACES=193, PETRI_TRANSITIONS=135} [2024-11-10 18:20:13,508 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 123 predicate places. [2024-11-10 18:20:13,508 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 135 transitions, 1244 flow [2024-11-10 18:20:13,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 35.473684210526315) internal successors, (674), 19 states have internal predecessors, (674), 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) [2024-11-10 18:20:13,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:13,509 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:13,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-10 18:20:13,709 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,SelfDestructingSolverStorable21 [2024-11-10 18:20:13,710 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:13,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:13,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1697673675, now seen corresponding path program 2 times [2024-11-10 18:20:13,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:13,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146036941] [2024-11-10 18:20:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:13,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:14,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146036941] [2024-11-10 18:20:14,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146036941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779603593] [2024-11-10 18:20:14,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:14,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:14,103 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) [2024-11-10 18:20:14,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-10 18:20:14,220 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:20:14,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:14,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-10 18:20:14,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:14,240 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 [2024-11-10 18:20:14,245 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 [2024-11-10 18:20:14,432 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:20:14,432 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 18 treesize of output 17 [2024-11-10 18:20:14,452 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:14,452 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 [2024-11-10 18:20:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:15,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:16,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779603593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:16,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:16,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2024-11-10 18:20:16,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597758373] [2024-11-10 18:20:16,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:16,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-10 18:20:16,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:16,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-10 18:20:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2024-11-10 18:20:18,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 74 [2024-11-10 18:20:18,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 135 transitions, 1244 flow. Second operand has 33 states, 33 states have (on average 29.303030303030305) internal successors, (967), 33 states have internal predecessors, (967), 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) [2024-11-10 18:20:18,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:18,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 74 [2024-11-10 18:20:18,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:21,710 INFO L124 PetriNetUnfolderBase]: 11226/17368 cut-off events. [2024-11-10 18:20:21,710 INFO L125 PetriNetUnfolderBase]: For 131269/135846 co-relation queries the response was YES. [2024-11-10 18:20:21,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82163 conditions, 17368 events. 11226/17368 cut-off events. For 131269/135846 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 121699 event pairs, 1469 based on Foata normal form. 355/17619 useless extension candidates. Maximal degree in co-relation 79496. Up to 3264 conditions per place. [2024-11-10 18:20:21,905 INFO L140 encePairwiseOnDemand]: 60/74 looper letters, 309 selfloop transitions, 48 changer transitions 0/389 dead transitions. [2024-11-10 18:20:21,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 389 transitions, 4478 flow [2024-11-10 18:20:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-10 18:20:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-10 18:20:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1037 transitions. [2024-11-10 18:20:21,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45204882301656496 [2024-11-10 18:20:21,907 INFO L175 Difference]: Start difference. First operand has 193 places, 135 transitions, 1244 flow. Second operand 31 states and 1037 transitions. [2024-11-10 18:20:21,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 389 transitions, 4478 flow [2024-11-10 18:20:21,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 389 transitions, 4278 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-11-10 18:20:21,994 INFO L231 Difference]: Finished difference. Result has 215 places, 150 transitions, 1427 flow [2024-11-10 18:20:21,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1427, PETRI_PLACES=215, PETRI_TRANSITIONS=150} [2024-11-10 18:20:21,994 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 145 predicate places. [2024-11-10 18:20:21,995 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 150 transitions, 1427 flow [2024-11-10 18:20:21,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 29.303030303030305) internal successors, (967), 33 states have internal predecessors, (967), 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) [2024-11-10 18:20:21,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:21,995 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:22,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-10 18:20:22,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:22,196 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:22,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1088275600, now seen corresponding path program 1 times [2024-11-10 18:20:22,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:22,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015831370] [2024-11-10 18:20:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:22,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 18:20:22,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:22,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015831370] [2024-11-10 18:20:22,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015831370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:22,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223949265] [2024-11-10 18:20:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:22,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:22,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:22,718 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) [2024-11-10 18:20:22,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-10 18:20:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:22,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 18:20:22,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:23,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:23,411 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 [2024-11-10 18:20:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:23,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223949265] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:23,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:23,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 29 [2024-11-10 18:20:23,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273301409] [2024-11-10 18:20:23,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:23,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-10 18:20:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-10 18:20:23,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2024-11-10 18:20:25,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 74 [2024-11-10 18:20:25,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 150 transitions, 1427 flow. Second operand has 30 states, 30 states have (on average 34.4) internal successors, (1032), 30 states have internal predecessors, (1032), 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) [2024-11-10 18:20:25,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:25,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 74 [2024-11-10 18:20:25,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:28,929 INFO L124 PetriNetUnfolderBase]: 10223/16162 cut-off events. [2024-11-10 18:20:28,929 INFO L125 PetriNetUnfolderBase]: For 117241/121374 co-relation queries the response was YES. [2024-11-10 18:20:29,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75701 conditions, 16162 events. 10223/16162 cut-off events. For 117241/121374 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 114551 event pairs, 1469 based on Foata normal form. 366/16422 useless extension candidates. Maximal degree in co-relation 73256. Up to 2241 conditions per place. [2024-11-10 18:20:29,096 INFO L140 encePairwiseOnDemand]: 59/74 looper letters, 352 selfloop transitions, 62 changer transitions 0/447 dead transitions. [2024-11-10 18:20:29,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 447 transitions, 4814 flow [2024-11-10 18:20:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-10 18:20:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-10 18:20:29,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1240 transitions. [2024-11-10 18:20:29,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2024-11-10 18:20:29,099 INFO L175 Difference]: Start difference. First operand has 215 places, 150 transitions, 1427 flow. Second operand 30 states and 1240 transitions. [2024-11-10 18:20:29,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 447 transitions, 4814 flow [2024-11-10 18:20:29,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 447 transitions, 4702 flow, removed 16 selfloop flow, removed 19 redundant places. [2024-11-10 18:20:29,191 INFO L231 Difference]: Finished difference. Result has 224 places, 158 transitions, 1528 flow [2024-11-10 18:20:29,192 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1528, PETRI_PLACES=224, PETRI_TRANSITIONS=158} [2024-11-10 18:20:29,192 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 154 predicate places. [2024-11-10 18:20:29,193 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 158 transitions, 1528 flow [2024-11-10 18:20:29,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 34.4) internal successors, (1032), 30 states have internal predecessors, (1032), 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) [2024-11-10 18:20:29,193 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:29,194 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:29,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:29,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:29,394 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:29,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:29,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2081861043, now seen corresponding path program 1 times [2024-11-10 18:20:29,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:29,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118455430] [2024-11-10 18:20:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:29,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:20:29,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:29,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118455430] [2024-11-10 18:20:29,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118455430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:29,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:29,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:29,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328633959] [2024-11-10 18:20:29,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:29,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:20:29,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:29,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:20:29,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:20:29,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 74 [2024-11-10 18:20:29,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 158 transitions, 1528 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:29,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:29,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 74 [2024-11-10 18:20:29,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:31,646 INFO L124 PetriNetUnfolderBase]: 7678/15325 cut-off events. [2024-11-10 18:20:31,647 INFO L125 PetriNetUnfolderBase]: For 86733/88360 co-relation queries the response was YES. [2024-11-10 18:20:31,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66204 conditions, 15325 events. 7678/15325 cut-off events. For 86733/88360 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 133947 event pairs, 1767 based on Foata normal form. 101/14887 useless extension candidates. Maximal degree in co-relation 63384. Up to 8968 conditions per place. [2024-11-10 18:20:31,846 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 134 selfloop transitions, 7 changer transitions 1/196 dead transitions. [2024-11-10 18:20:31,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 196 transitions, 2173 flow [2024-11-10 18:20:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:20:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:20:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-11-10 18:20:31,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7252252252252253 [2024-11-10 18:20:31,847 INFO L175 Difference]: Start difference. First operand has 224 places, 158 transitions, 1528 flow. Second operand 3 states and 161 transitions. [2024-11-10 18:20:31,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 196 transitions, 2173 flow [2024-11-10 18:20:31,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 196 transitions, 2009 flow, removed 4 selfloop flow, removed 23 redundant places. [2024-11-10 18:20:31,976 INFO L231 Difference]: Finished difference. Result has 204 places, 164 transitions, 1481 flow [2024-11-10 18:20:31,977 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1481, PETRI_PLACES=204, PETRI_TRANSITIONS=164} [2024-11-10 18:20:31,977 INFO L277 CegarLoopForPetriNet]: 70 programPoint places, 134 predicate places. [2024-11-10 18:20:31,977 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 164 transitions, 1481 flow [2024-11-10 18:20:31,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:31,977 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:31,978 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:31,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-10 18:20:31,978 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:31,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:31,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1678801544, now seen corresponding path program 2 times [2024-11-10 18:20:31,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:31,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912502008] [2024-11-10 18:20:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:31,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-10 18:20:32,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:32,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912502008] [2024-11-10 18:20:32,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912502008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:32,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162660815] [2024-11-10 18:20:32,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:32,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:32,656 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) [2024-11-10 18:20:32,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-10 18:20:32,757 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:20:32,757 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:32,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 18:20:32,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:32,768 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 [2024-11-10 18:20:32,772 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 [2024-11-10 18:20:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:20:32,860 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 [2024-11-10 18:20:32,867 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:32,867 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 [2024-11-10 18:20:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:20:32,967 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:20:33,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162660815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:33,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:33,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-11-10 18:20:33,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942147577] [2024-11-10 18:20:33,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:33,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-10 18:20:33,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:33,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-10 18:20:33,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2024-11-10 18:20:34,541 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 74 [2024-11-10 18:20:34,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 164 transitions, 1481 flow. Second operand has 25 states, 25 states have (on average 27.84) internal successors, (696), 25 states have internal predecessors, (696), 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) [2024-11-10 18:20:34,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:34,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 74 [2024-11-10 18:20:34,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand