./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-trans.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/chl-word-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9cb2b0cbecf02e8cce2fd890595fb88c3204482a27ce7ac6f4ef6fb92949d747 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:14:47,839 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:14:47,925 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:14:47,933 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:14:47,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:14:47,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:14:47,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:14:47,971 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:14:47,971 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:14:47,972 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:14:47,972 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:14:47,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:14:47,973 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:14:47,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:14:47,974 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:14:47,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:14:47,975 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:14:47,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:14:47,976 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:14:47,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:14:47,977 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:14:47,977 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:14:47,977 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:14:47,978 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:14:47,978 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:14:47,978 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:14:47,979 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:14:47,979 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:14:47,979 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:14:47,980 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:14:47,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:14:47,981 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:14:47,981 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:14:47,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:14:47,982 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:14:47,982 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:14:47,982 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:14:47,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:14:47,983 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:14:47,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:14:47,999 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:14:48,000 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:14:48,000 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9cb2b0cbecf02e8cce2fd890595fb88c3204482a27ce7ac6f4ef6fb92949d747 [2024-11-10 18:14:48,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:14:48,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:14:48,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:14:48,313 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:14:48,313 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:14:48,315 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2024-11-10 18:14:49,971 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:14:50,201 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:14:50,202 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2024-11-10 18:14:50,211 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/139a3181f/0471c6d3676340d0a2435af3a0e4f3de/FLAGcc716224c [2024-11-10 18:14:50,226 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/139a3181f/0471c6d3676340d0a2435af3a0e4f3de [2024-11-10 18:14:50,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:14:50,230 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:14:50,232 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:14:50,232 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:14:50,236 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:14:50,237 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8a0eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50, skipping insertion in model container [2024-11-10 18:14:50,238 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,264 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:14:50,516 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 18:14:50,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:14:50,533 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:14:50,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:14:50,579 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:14:50,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50 WrapperNode [2024-11-10 18:14:50,580 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:14:50,581 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:14:50,581 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:14:50,581 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:14:50,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,598 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,622 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 164 [2024-11-10 18:14:50,622 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:14:50,623 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:14:50,623 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:14:50,623 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:14:50,634 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,638 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,658 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-10 18:14:50,659 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,659 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,676 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,677 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,684 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:14:50,686 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:14:50,686 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:14:50,686 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:14:50,688 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (1/1) ... [2024-11-10 18:14:50,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:14:50,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:50,737 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 18:14:50,744 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 18:14:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:14:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:14:50,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:14:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:14:50,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:14:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:14:50,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:14:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:14:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:14:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:14:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:14:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:14:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:14:50,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:14:50,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:14:50,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:14:50,801 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 18:14:50,951 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:14:50,955 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:14:51,564 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:14:51,565 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:14:51,957 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:14:51,957 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:14:51,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:14:51 BoogieIcfgContainer [2024-11-10 18:14:51,958 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:14:51,963 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:14:51,964 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:14:51,968 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:14:51,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:14:50" (1/3) ... [2024-11-10 18:14:51,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699bed5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:14:51, skipping insertion in model container [2024-11-10 18:14:51,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:50" (2/3) ... [2024-11-10 18:14:51,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699bed5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:14:51, skipping insertion in model container [2024-11-10 18:14:51,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:14:51" (3/3) ... [2024-11-10 18:14:51,973 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-trans.wvr.c [2024-11-10 18:14:51,994 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:14:51,995 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-10 18:14:51,995 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:14:52,090 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:14:52,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 111 transitions, 243 flow [2024-11-10 18:14:52,194 INFO L124 PetriNetUnfolderBase]: 18/108 cut-off events. [2024-11-10 18:14:52,195 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:14:52,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 108 events. 18/108 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 324 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 79. Up to 3 conditions per place. [2024-11-10 18:14:52,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 111 transitions, 243 flow [2024-11-10 18:14:52,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 232 flow [2024-11-10 18:14:52,233 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:14:52,243 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;@405b0cc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:14:52,244 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-10 18:14:52,250 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:14:52,250 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:14:52,251 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:14:52,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:52,252 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:14:52,253 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:14:52,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:52,260 INFO L85 PathProgramCache]: Analyzing trace with hash 21388774, now seen corresponding path program 1 times [2024-11-10 18:14:52,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:52,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841827263] [2024-11-10 18:14:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:52,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:52,755 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 18:14:52,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:52,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841827263] [2024-11-10 18:14:52,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841827263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:52,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:52,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:14:52,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229927299] [2024-11-10 18:14:52,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:52,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:52,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:52,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:14:53,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-10 18:14:53,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 18:14:53,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:53,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-10 18:14:53,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:53,699 INFO L124 PetriNetUnfolderBase]: 2426/4508 cut-off events. [2024-11-10 18:14:53,700 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2024-11-10 18:14:53,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4508 events. 2426/4508 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30886 event pairs, 1460 based on Foata normal form. 316/3275 useless extension candidates. Maximal degree in co-relation 7396. Up to 3188 conditions per place. [2024-11-10 18:14:53,750 INFO L140 encePairwiseOnDemand]: 99/111 looper letters, 42 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-11-10 18:14:53,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 96 transitions, 298 flow [2024-11-10 18:14:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:14:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:14:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2024-11-10 18:14:53,765 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-10 18:14:53,767 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 232 flow. Second operand 3 states and 222 transitions. [2024-11-10 18:14:53,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 96 transitions, 298 flow [2024-11-10 18:14:53,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 286 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:14:53,782 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 202 flow [2024-11-10 18:14:53,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-11-10 18:14:53,792 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2024-11-10 18:14:53,792 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 202 flow [2024-11-10 18:14:53,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 18:14:53,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:53,793 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:14:53,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:14:53,794 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:14:53,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:53,796 INFO L85 PathProgramCache]: Analyzing trace with hash 21388775, now seen corresponding path program 1 times [2024-11-10 18:14:53,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:53,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280395539] [2024-11-10 18:14:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:53,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:54,081 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 18:14:54,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:54,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280395539] [2024-11-10 18:14:54,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280395539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:54,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:54,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:14:54,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741638940] [2024-11-10 18:14:54,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:54,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:54,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:54,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:14:54,183 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-10 18:14:54,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 18:14:54,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:54,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-10 18:14:54,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:54,804 INFO L124 PetriNetUnfolderBase]: 2427/4513 cut-off events. [2024-11-10 18:14:54,805 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-10 18:14:54,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7770 conditions, 4513 events. 2427/4513 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30898 event pairs, 1460 based on Foata normal form. 0/2961 useless extension candidates. Maximal degree in co-relation 7725. Up to 3201 conditions per place. [2024-11-10 18:14:54,849 INFO L140 encePairwiseOnDemand]: 106/111 looper letters, 46 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-11-10 18:14:54,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 99 transitions, 308 flow [2024-11-10 18:14:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:14:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:14:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 275 transitions. [2024-11-10 18:14:54,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6193693693693694 [2024-11-10 18:14:54,853 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 202 flow. Second operand 4 states and 275 transitions. [2024-11-10 18:14:54,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 99 transitions, 308 flow [2024-11-10 18:14:54,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 99 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:54,859 INFO L231 Difference]: Finished difference. Result has 93 places, 99 transitions, 225 flow [2024-11-10 18:14:54,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=93, PETRI_TRANSITIONS=99} [2024-11-10 18:14:54,860 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -6 predicate places. [2024-11-10 18:14:54,860 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 99 transitions, 225 flow [2024-11-10 18:14:54,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 18:14:54,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:54,861 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:14:54,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:14:54,862 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:14:54,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:54,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1538490456, now seen corresponding path program 1 times [2024-11-10 18:14:54,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:54,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090688318] [2024-11-10 18:14:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:54,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:55,193 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 18:14:55,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:55,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090688318] [2024-11-10 18:14:55,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090688318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:55,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646469292] [2024-11-10 18:14:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:55,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:55,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:55,198 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 18:14:55,199 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 18:14:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:55,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:14:55,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:55,347 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 18:14:55,639 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 18:14:55,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:55,797 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 18:14:55,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646469292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:55,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:55,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:14:55,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918153095] [2024-11-10 18:14:55,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:55,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:14:55,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:14:55,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:14:56,313 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-10 18:14:56,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 99 transitions, 225 flow. Second operand has 11 states, 11 states have (on average 54.36363636363637) internal successors, (598), 11 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 18:14:56,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:56,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-10 18:14:56,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:57,119 INFO L124 PetriNetUnfolderBase]: 2428/4517 cut-off events. [2024-11-10 18:14:57,119 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-10 18:14:57,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7794 conditions, 4517 events. 2428/4517 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30918 event pairs, 1460 based on Foata normal form. 0/2964 useless extension candidates. Maximal degree in co-relation 7757. Up to 3198 conditions per place. [2024-11-10 18:14:57,166 INFO L140 encePairwiseOnDemand]: 102/111 looper letters, 43 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-11-10 18:14:57,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 103 transitions, 351 flow [2024-11-10 18:14:57,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:14:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:14:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 536 transitions. [2024-11-10 18:14:57,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5365365365365365 [2024-11-10 18:14:57,171 INFO L175 Difference]: Start difference. First operand has 93 places, 99 transitions, 225 flow. Second operand 9 states and 536 transitions. [2024-11-10 18:14:57,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 103 transitions, 351 flow [2024-11-10 18:14:57,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 103 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:14:57,177 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 258 flow [2024-11-10 18:14:57,177 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=258, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2024-11-10 18:14:57,178 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2024-11-10 18:14:57,179 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 258 flow [2024-11-10 18:14:57,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.36363636363637) internal successors, (598), 11 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 18:14:57,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:57,180 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:57,203 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 18:14:57,384 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 18:14:57,385 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:14:57,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:57,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1537609791, now seen corresponding path program 1 times [2024-11-10 18:14:57,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:57,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019874022] [2024-11-10 18:14:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:57,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:57,630 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 18:14:57,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019874022] [2024-11-10 18:14:57,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019874022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:57,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:57,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:57,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418768936] [2024-11-10 18:14:57,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:57,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:57,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:57,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:57,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:57,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-10 18:14:57,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 18:14:57,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:57,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-10 18:14:57,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:58,376 INFO L124 PetriNetUnfolderBase]: 2429/4522 cut-off events. [2024-11-10 18:14:58,377 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-10 18:14:58,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7811 conditions, 4522 events. 2429/4522 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30981 event pairs, 1460 based on Foata normal form. 0/2971 useless extension candidates. Maximal degree in co-relation 7769. Up to 3201 conditions per place. [2024-11-10 18:14:58,421 INFO L140 encePairwiseOnDemand]: 103/111 looper letters, 47 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2024-11-10 18:14:58,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 104 transitions, 376 flow [2024-11-10 18:14:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:14:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:14:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 333 transitions. [2024-11-10 18:14:58,424 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-10 18:14:58,424 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 258 flow. Second operand 5 states and 333 transitions. [2024-11-10 18:14:58,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 104 transitions, 376 flow [2024-11-10 18:14:58,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 104 transitions, 334 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-10 18:14:58,430 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 258 flow [2024-11-10 18:14:58,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-11-10 18:14:58,433 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2024-11-10 18:14:58,434 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 258 flow [2024-11-10 18:14:58,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 18:14:58,434 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:58,434 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:58,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:14:58,435 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:14:58,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1107739145, now seen corresponding path program 1 times [2024-11-10 18:14:58,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:58,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892427272] [2024-11-10 18:14:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:58,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:58,731 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 18:14:58,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:58,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892427272] [2024-11-10 18:14:58,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892427272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:58,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271785698] [2024-11-10 18:14:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:58,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:58,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:58,734 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 18:14:58,737 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 18:14:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:58,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 18:14:58,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:58,844 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 18:14:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:14:59,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:59,278 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 18:14:59,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271785698] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:59,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:59,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:14:59,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099400533] [2024-11-10 18:14:59,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:59,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:14:59,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:14:59,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:15:00,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-10 18:15:00,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 258 flow. Second operand has 13 states, 13 states have (on average 54.46153846153846) internal successors, (708), 13 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 18:15:00,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:00,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-10 18:15:00,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:00,741 INFO L124 PetriNetUnfolderBase]: 2429/4521 cut-off events. [2024-11-10 18:15:00,741 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-10 18:15:00,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7808 conditions, 4521 events. 2429/4521 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 30997 event pairs, 1460 based on Foata normal form. 0/2970 useless extension candidates. Maximal degree in co-relation 7752. Up to 3192 conditions per place. [2024-11-10 18:15:00,780 INFO L140 encePairwiseOnDemand]: 101/111 looper letters, 42 selfloop transitions, 17 changer transitions 0/105 dead transitions. [2024-11-10 18:15:00,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 105 transitions, 376 flow [2024-11-10 18:15:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:15:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:15:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 481 transitions. [2024-11-10 18:15:00,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-10 18:15:00,783 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 258 flow. Second operand 8 states and 481 transitions. [2024-11-10 18:15:00,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 105 transitions, 376 flow [2024-11-10 18:15:00,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:15:00,786 INFO L231 Difference]: Finished difference. Result has 102 places, 103 transitions, 282 flow [2024-11-10 18:15:00,787 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=282, PETRI_PLACES=102, PETRI_TRANSITIONS=103} [2024-11-10 18:15:00,787 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 3 predicate places. [2024-11-10 18:15:00,788 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 103 transitions, 282 flow [2024-11-10 18:15:00,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.46153846153846) internal successors, (708), 13 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 18:15:00,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:00,789 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:00,809 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 18:15:00,992 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 18:15:00,993 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:00,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1108711810, now seen corresponding path program 1 times [2024-11-10 18:15:00,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:00,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948580559] [2024-11-10 18:15:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:00,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:01,172 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 18:15:01,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:01,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948580559] [2024-11-10 18:15:01,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948580559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:01,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:01,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:15:01,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200635162] [2024-11-10 18:15:01,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:01,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:01,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:01,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-10 18:15:01,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 103 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 18:15:01,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:01,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-10 18:15:01,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:01,774 INFO L124 PetriNetUnfolderBase]: 2430/4526 cut-off events. [2024-11-10 18:15:01,775 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-10 18:15:01,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7826 conditions, 4526 events. 2430/4526 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 30988 event pairs, 1460 based on Foata normal form. 0/2976 useless extension candidates. Maximal degree in co-relation 7762. Up to 3204 conditions per place. [2024-11-10 18:15:01,814 INFO L140 encePairwiseOnDemand]: 102/111 looper letters, 48 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2024-11-10 18:15:01,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 106 transitions, 404 flow [2024-11-10 18:15:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:15:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:15:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 332 transitions. [2024-11-10 18:15:01,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5981981981981982 [2024-11-10 18:15:01,817 INFO L175 Difference]: Start difference. First operand has 102 places, 103 transitions, 282 flow. Second operand 5 states and 332 transitions. [2024-11-10 18:15:01,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 106 transitions, 404 flow [2024-11-10 18:15:01,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 106 transitions, 369 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-10 18:15:01,820 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 292 flow [2024-11-10 18:15:01,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2024-11-10 18:15:01,821 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2024-11-10 18:15:01,821 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 292 flow [2024-11-10 18:15:01,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 18:15:01,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:01,821 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:01,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:15:01,822 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:01,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1335682336, now seen corresponding path program 1 times [2024-11-10 18:15:01,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:01,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942402442] [2024-11-10 18:15:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:02,130 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 18:15:02,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:02,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942402442] [2024-11-10 18:15:02,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942402442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:02,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27805359] [2024-11-10 18:15:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:02,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:02,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:02,135 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 18:15:02,137 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 18:15:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:02,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:15:02,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:02,255 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 18:15:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:02,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:02,699 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 18:15:02,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27805359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:02,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:02,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:15:02,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375364108] [2024-11-10 18:15:02,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:02,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:15:02,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:15:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:15:03,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-10 18:15:03,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 292 flow. Second operand has 13 states, 13 states have (on average 54.76923076923077) internal successors, (712), 13 states have internal predecessors, (712), 0 states have call successors, (0), 0 states 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 18:15:03,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:03,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-10 18:15:03,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:04,462 INFO L124 PetriNetUnfolderBase]: 2430/4525 cut-off events. [2024-11-10 18:15:04,464 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-10 18:15:04,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 4525 events. 2430/4525 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31019 event pairs, 1460 based on Foata normal form. 0/2976 useless extension candidates. Maximal degree in co-relation 7768. Up to 3195 conditions per place. [2024-11-10 18:15:04,502 INFO L140 encePairwiseOnDemand]: 101/111 looper letters, 42 selfloop transitions, 19 changer transitions 0/107 dead transitions. [2024-11-10 18:15:04,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 107 transitions, 414 flow [2024-11-10 18:15:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:15:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:15:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 480 transitions. [2024-11-10 18:15:04,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-11-10 18:15:04,504 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 292 flow. Second operand 8 states and 480 transitions. [2024-11-10 18:15:04,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 107 transitions, 414 flow [2024-11-10 18:15:04,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:15:04,509 INFO L231 Difference]: Finished difference. Result has 105 places, 105 transitions, 319 flow [2024-11-10 18:15:04,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=319, PETRI_PLACES=105, PETRI_TRANSITIONS=105} [2024-11-10 18:15:04,512 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 6 predicate places. [2024-11-10 18:15:04,512 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 105 transitions, 319 flow [2024-11-10 18:15:04,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.76923076923077) internal successors, (712), 13 states have internal predecessors, (712), 0 states have call successors, (0), 0 states 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 18:15:04,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:04,513 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:04,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:15:04,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:04,715 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:04,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash -290048289, now seen corresponding path program 1 times [2024-11-10 18:15:04,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:04,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563443725] [2024-11-10 18:15:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:04,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:04,797 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 18:15:04,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:04,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563443725] [2024-11-10 18:15:04,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563443725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:04,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:04,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:15:04,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218066795] [2024-11-10 18:15:04,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:04,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:04,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:04,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:04,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:04,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 105 transitions, 319 flow. Second operand has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:15:04,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:04,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:04,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:05,596 INFO L124 PetriNetUnfolderBase]: 4368/8393 cut-off events. [2024-11-10 18:15:05,597 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-11-10 18:15:05,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14399 conditions, 8393 events. 4368/8393 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 65639 event pairs, 2486 based on Foata normal form. 114/5817 useless extension candidates. Maximal degree in co-relation 8792. Up to 3605 conditions per place. [2024-11-10 18:15:05,675 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 121 selfloop transitions, 6 changer transitions 0/172 dead transitions. [2024-11-10 18:15:05,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 172 transitions, 761 flow [2024-11-10 18:15:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 443 transitions. [2024-11-10 18:15:05,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6651651651651652 [2024-11-10 18:15:05,677 INFO L175 Difference]: Start difference. First operand has 105 places, 105 transitions, 319 flow. Second operand 6 states and 443 transitions. [2024-11-10 18:15:05,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 172 transitions, 761 flow [2024-11-10 18:15:05,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 172 transitions, 699 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-10 18:15:05,682 INFO L231 Difference]: Finished difference. Result has 106 places, 108 transitions, 315 flow [2024-11-10 18:15:05,683 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=106, PETRI_TRANSITIONS=108} [2024-11-10 18:15:05,685 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 7 predicate places. [2024-11-10 18:15:05,685 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 108 transitions, 315 flow [2024-11-10 18:15:05,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:15:05,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:05,687 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:05,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:15:05,687 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:05,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:05,689 INFO L85 PathProgramCache]: Analyzing trace with hash 773047980, now seen corresponding path program 1 times [2024-11-10 18:15:05,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:05,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935293627] [2024-11-10 18:15:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:05,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:05,792 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 18:15:05,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:05,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935293627] [2024-11-10 18:15:05,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935293627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:05,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:05,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:15:05,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251918753] [2024-11-10 18:15:05,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:05,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:05,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:05,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:05,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:05,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 315 flow. Second operand has 5 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 18:15:05,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:05,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:05,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:06,889 INFO L124 PetriNetUnfolderBase]: 7203/14280 cut-off events. [2024-11-10 18:15:06,890 INFO L125 PetriNetUnfolderBase]: For 1694/1826 co-relation queries the response was YES. [2024-11-10 18:15:06,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25557 conditions, 14280 events. 7203/14280 cut-off events. For 1694/1826 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 124250 event pairs, 4199 based on Foata normal form. 206/10358 useless extension candidates. Maximal degree in co-relation 17455. Up to 6039 conditions per place. [2024-11-10 18:15:07,026 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 118 selfloop transitions, 8 changer transitions 0/171 dead transitions. [2024-11-10 18:15:07,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 171 transitions, 735 flow [2024-11-10 18:15:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 438 transitions. [2024-11-10 18:15:07,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6576576576576577 [2024-11-10 18:15:07,029 INFO L175 Difference]: Start difference. First operand has 106 places, 108 transitions, 315 flow. Second operand 6 states and 438 transitions. [2024-11-10 18:15:07,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 171 transitions, 735 flow [2024-11-10 18:15:07,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 171 transitions, 733 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:15:07,037 INFO L231 Difference]: Finished difference. Result has 113 places, 111 transitions, 353 flow [2024-11-10 18:15:07,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=113, PETRI_TRANSITIONS=111} [2024-11-10 18:15:07,039 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 14 predicate places. [2024-11-10 18:15:07,039 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 111 transitions, 353 flow [2024-11-10 18:15:07,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 18:15:07,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:07,039 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:07,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:15:07,039 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:07,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1135200305, now seen corresponding path program 1 times [2024-11-10 18:15:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639991687] [2024-11-10 18:15:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:07,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:07,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639991687] [2024-11-10 18:15:07,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639991687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:07,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:07,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:15:07,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981337477] [2024-11-10 18:15:07,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:07,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:07,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:07,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:07,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:07,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 111 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 18:15:07,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:07,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:07,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:08,136 INFO L124 PetriNetUnfolderBase]: 6454/12837 cut-off events. [2024-11-10 18:15:08,136 INFO L125 PetriNetUnfolderBase]: For 3122/3269 co-relation queries the response was YES. [2024-11-10 18:15:08,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24312 conditions, 12837 events. 6454/12837 cut-off events. For 3122/3269 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 109312 event pairs, 3839 based on Foata normal form. 82/9559 useless extension candidates. Maximal degree in co-relation 17178. Up to 5749 conditions per place. [2024-11-10 18:15:08,236 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 109 selfloop transitions, 10 changer transitions 0/164 dead transitions. [2024-11-10 18:15:08,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 164 transitions, 735 flow [2024-11-10 18:15:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 433 transitions. [2024-11-10 18:15:08,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6501501501501501 [2024-11-10 18:15:08,240 INFO L175 Difference]: Start difference. First operand has 113 places, 111 transitions, 353 flow. Second operand 6 states and 433 transitions. [2024-11-10 18:15:08,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 164 transitions, 735 flow [2024-11-10 18:15:08,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 164 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:15:08,252 INFO L231 Difference]: Finished difference. Result has 119 places, 115 transitions, 408 flow [2024-11-10 18:15:08,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=408, PETRI_PLACES=119, PETRI_TRANSITIONS=115} [2024-11-10 18:15:08,255 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 20 predicate places. [2024-11-10 18:15:08,255 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 115 transitions, 408 flow [2024-11-10 18:15:08,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 18:15:08,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:08,256 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:08,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:15:08,256 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:08,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:08,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1017835774, now seen corresponding path program 1 times [2024-11-10 18:15:08,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:08,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771948316] [2024-11-10 18:15:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:08,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:08,349 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 18:15:08,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:08,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771948316] [2024-11-10 18:15:08,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771948316] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:08,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:08,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:15:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136278330] [2024-11-10 18:15:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:08,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:08,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:08,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:08,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 115 transitions, 408 flow. Second operand has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 18:15:08,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:08,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:08,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:09,319 INFO L124 PetriNetUnfolderBase]: 5694/11321 cut-off events. [2024-11-10 18:15:09,320 INFO L125 PetriNetUnfolderBase]: For 5411/5611 co-relation queries the response was YES. [2024-11-10 18:15:09,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22680 conditions, 11321 events. 5694/11321 cut-off events. For 5411/5611 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 92923 event pairs, 3504 based on Foata normal form. 134/8789 useless extension candidates. Maximal degree in co-relation 16318. Up to 5081 conditions per place. [2024-11-10 18:15:09,408 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 127 selfloop transitions, 6 changer transitions 0/178 dead transitions. [2024-11-10 18:15:09,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 178 transitions, 899 flow [2024-11-10 18:15:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 435 transitions. [2024-11-10 18:15:09,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531531531531531 [2024-11-10 18:15:09,417 INFO L175 Difference]: Start difference. First operand has 119 places, 115 transitions, 408 flow. Second operand 6 states and 435 transitions. [2024-11-10 18:15:09,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 178 transitions, 899 flow [2024-11-10 18:15:09,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 178 transitions, 883 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:15:09,436 INFO L231 Difference]: Finished difference. Result has 123 places, 117 transitions, 424 flow [2024-11-10 18:15:09,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=424, PETRI_PLACES=123, PETRI_TRANSITIONS=117} [2024-11-10 18:15:09,438 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 24 predicate places. [2024-11-10 18:15:09,438 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 117 transitions, 424 flow [2024-11-10 18:15:09,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 18:15:09,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:09,439 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:09,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:15:09,439 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:09,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:09,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1899426466, now seen corresponding path program 1 times [2024-11-10 18:15:09,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:09,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043042882] [2024-11-10 18:15:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:09,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:09,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043042882] [2024-11-10 18:15:09,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043042882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:09,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:09,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:15:09,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613496858] [2024-11-10 18:15:09,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:09,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:09,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:09,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:09,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:09,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:09,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 117 transitions, 424 flow. Second operand has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 18:15:09,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:09,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:09,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:11,039 INFO L124 PetriNetUnfolderBase]: 9796/20396 cut-off events. [2024-11-10 18:15:11,039 INFO L125 PetriNetUnfolderBase]: For 12225/12356 co-relation queries the response was YES. [2024-11-10 18:15:11,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42175 conditions, 20396 events. 9796/20396 cut-off events. For 12225/12356 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 191227 event pairs, 5946 based on Foata normal form. 184/16580 useless extension candidates. Maximal degree in co-relation 30213. Up to 7666 conditions per place. [2024-11-10 18:15:11,478 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 133 selfloop transitions, 9 changer transitions 0/187 dead transitions. [2024-11-10 18:15:11,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 187 transitions, 988 flow [2024-11-10 18:15:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 434 transitions. [2024-11-10 18:15:11,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6516516516516516 [2024-11-10 18:15:11,487 INFO L175 Difference]: Start difference. First operand has 123 places, 117 transitions, 424 flow. Second operand 6 states and 434 transitions. [2024-11-10 18:15:11,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 187 transitions, 988 flow [2024-11-10 18:15:11,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 187 transitions, 981 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:15:11,519 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 482 flow [2024-11-10 18:15:11,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=482, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2024-11-10 18:15:11,521 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 29 predicate places. [2024-11-10 18:15:11,521 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 482 flow [2024-11-10 18:15:11,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 18:15:11,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:11,523 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 18:15:11,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:15:11,523 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:11,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1941080636, now seen corresponding path program 1 times [2024-11-10 18:15:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:11,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533633778] [2024-11-10 18:15:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:11,921 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 18:15:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533633778] [2024-11-10 18:15:11,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533633778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478519227] [2024-11-10 18:15:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:11,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:11,925 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 18:15:11,927 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 18:15:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:12,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:15:12,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:12,026 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 18:15:12,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:12,099 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 18:15:12,123 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-10 18:15:12,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-10 18:15:12,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:12,185 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 18:15:12,196 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:15:12,196 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 18:15:12,260 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 18:15:12,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:12,608 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 162 treesize of output 156 [2024-11-10 18:15:12,836 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 18:15:12,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478519227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:12,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:12,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-10 18:15:12,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873900873] [2024-11-10 18:15:12,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:12,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 18:15:12,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 18:15:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-10 18:15:14,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2024-11-10 18:15:14,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 482 flow. Second operand has 16 states, 16 states have (on average 48.0625) internal successors, (769), 16 states have internal predecessors, (769), 0 states have call successors, (0), 0 states 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 18:15:14,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:14,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2024-11-10 18:15:14,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:17,075 INFO L124 PetriNetUnfolderBase]: 16469/30703 cut-off events. [2024-11-10 18:15:17,075 INFO L125 PetriNetUnfolderBase]: For 23503/24379 co-relation queries the response was YES. [2024-11-10 18:15:17,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67813 conditions, 30703 events. 16469/30703 cut-off events. For 23503/24379 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 266812 event pairs, 6959 based on Foata normal form. 0/25653 useless extension candidates. Maximal degree in co-relation 51791. Up to 9080 conditions per place. [2024-11-10 18:15:17,558 INFO L140 encePairwiseOnDemand]: 94/111 looper letters, 156 selfloop transitions, 22 changer transitions 0/220 dead transitions. [2024-11-10 18:15:17,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 220 transitions, 1217 flow [2024-11-10 18:15:17,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:15:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:15:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 578 transitions. [2024-11-10 18:15:17,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5785785785785785 [2024-11-10 18:15:17,561 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 482 flow. Second operand 9 states and 578 transitions. [2024-11-10 18:15:17,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 220 transitions, 1217 flow [2024-11-10 18:15:17,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 220 transitions, 1211 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:15:17,623 INFO L231 Difference]: Finished difference. Result has 132 places, 126 transitions, 577 flow [2024-11-10 18:15:17,623 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=577, PETRI_PLACES=132, PETRI_TRANSITIONS=126} [2024-11-10 18:15:17,624 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 33 predicate places. [2024-11-10 18:15:17,625 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 126 transitions, 577 flow [2024-11-10 18:15:17,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.0625) internal successors, (769), 16 states have internal predecessors, (769), 0 states have call successors, (0), 0 states 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 18:15:17,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:17,626 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 18:15:17,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:15:17,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:17,827 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:17,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash -43956926, now seen corresponding path program 1 times [2024-11-10 18:15:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:17,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773717574] [2024-11-10 18:15:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:18,073 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 18:15:18,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:18,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773717574] [2024-11-10 18:15:18,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773717574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:18,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23394608] [2024-11-10 18:15:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:18,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:18,079 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 18:15:18,080 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 18:15:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:18,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:15:18,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:18,180 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 18:15:18,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:18,237 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 18:15:18,244 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:15:18,245 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 18:15:18,305 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 18:15:18,306 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:18,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:15:18,512 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 18:15:18,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23394608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:18,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:18,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-10 18:15:18,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188304349] [2024-11-10 18:15:18,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:18,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:15:18,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:15:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:15:19,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-10 18:15:19,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 126 transitions, 577 flow. Second operand has 13 states, 13 states have (on average 55.07692307692308) internal successors, (716), 13 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 18:15:19,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:19,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-10 18:15:19,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:21,906 INFO L124 PetriNetUnfolderBase]: 12784/24034 cut-off events. [2024-11-10 18:15:21,906 INFO L125 PetriNetUnfolderBase]: For 27579/28410 co-relation queries the response was YES. [2024-11-10 18:15:22,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56349 conditions, 24034 events. 12784/24034 cut-off events. For 27579/28410 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 204862 event pairs, 5906 based on Foata normal form. 91/21021 useless extension candidates. Maximal degree in co-relation 41056. Up to 6968 conditions per place. [2024-11-10 18:15:22,092 INFO L140 encePairwiseOnDemand]: 98/111 looper letters, 138 selfloop transitions, 28 changer transitions 0/211 dead transitions. [2024-11-10 18:15:22,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 211 transitions, 1195 flow [2024-11-10 18:15:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:15:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:15:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2024-11-10 18:15:22,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6176176176176176 [2024-11-10 18:15:22,094 INFO L175 Difference]: Start difference. First operand has 132 places, 126 transitions, 577 flow. Second operand 9 states and 617 transitions. [2024-11-10 18:15:22,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 211 transitions, 1195 flow [2024-11-10 18:15:22,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 211 transitions, 1177 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-10 18:15:22,138 INFO L231 Difference]: Finished difference. Result has 139 places, 132 transitions, 680 flow [2024-11-10 18:15:22,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=680, PETRI_PLACES=139, PETRI_TRANSITIONS=132} [2024-11-10 18:15:22,138 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 40 predicate places. [2024-11-10 18:15:22,138 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 132 transitions, 680 flow [2024-11-10 18:15:22,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 55.07692307692308) internal successors, (716), 13 states have internal predecessors, (716), 0 states have call successors, (0), 0 states 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 18:15:22,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:22,139 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 18:15:22,158 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 18:15:22,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 18:15:22,340 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:22,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:22,341 INFO L85 PathProgramCache]: Analyzing trace with hash -43956927, now seen corresponding path program 1 times [2024-11-10 18:15:22,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:22,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276654220] [2024-11-10 18:15:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:22,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:22,434 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 18:15:22,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:22,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276654220] [2024-11-10 18:15:22,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276654220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:22,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:22,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:15:22,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460864913] [2024-11-10 18:15:22,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:22,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:15:22,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:22,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:15:22,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:15:22,507 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 111 [2024-11-10 18:15:22,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 132 transitions, 680 flow. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 18:15:22,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:22,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 111 [2024-11-10 18:15:22,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:24,686 INFO L124 PetriNetUnfolderBase]: 13878/25745 cut-off events. [2024-11-10 18:15:24,687 INFO L125 PetriNetUnfolderBase]: For 36832/37474 co-relation queries the response was YES. [2024-11-10 18:15:24,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63386 conditions, 25745 events. 13878/25745 cut-off events. For 36832/37474 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 216107 event pairs, 9393 based on Foata normal form. 342/23072 useless extension candidates. Maximal degree in co-relation 46127. Up to 18809 conditions per place. [2024-11-10 18:15:24,915 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 76 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2024-11-10 18:15:24,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 128 transitions, 848 flow [2024-11-10 18:15:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:15:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:15:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 296 transitions. [2024-11-10 18:15:24,917 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-10 18:15:24,918 INFO L175 Difference]: Start difference. First operand has 139 places, 132 transitions, 680 flow. Second operand 5 states and 296 transitions. [2024-11-10 18:15:24,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 128 transitions, 848 flow [2024-11-10 18:15:24,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 128 transitions, 831 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 18:15:24,973 INFO L231 Difference]: Finished difference. Result has 136 places, 128 transitions, 679 flow [2024-11-10 18:15:24,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=679, PETRI_PLACES=136, PETRI_TRANSITIONS=128} [2024-11-10 18:15:24,974 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 37 predicate places. [2024-11-10 18:15:24,974 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 128 transitions, 679 flow [2024-11-10 18:15:24,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 18:15:24,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:24,975 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:24,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 18:15:24,975 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:24,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash -835113100, now seen corresponding path program 1 times [2024-11-10 18:15:24,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:24,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805697110] [2024-11-10 18:15:24,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:24,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:15:25,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:25,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805697110] [2024-11-10 18:15:25,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805697110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:25,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:25,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:15:25,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439361129] [2024-11-10 18:15:25,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:25,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:25,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:25,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:25,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:25,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 128 transitions, 679 flow. Second operand has 5 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 18:15:25,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:25,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:25,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:26,874 INFO L124 PetriNetUnfolderBase]: 10894/20354 cut-off events. [2024-11-10 18:15:26,874 INFO L125 PetriNetUnfolderBase]: For 28437/28913 co-relation queries the response was YES. [2024-11-10 18:15:26,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50525 conditions, 20354 events. 10894/20354 cut-off events. For 28437/28913 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 164781 event pairs, 6837 based on Foata normal form. 180/18359 useless extension candidates. Maximal degree in co-relation 37731. Up to 9275 conditions per place. [2024-11-10 18:15:27,087 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 139 selfloop transitions, 16 changer transitions 0/192 dead transitions. [2024-11-10 18:15:27,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 192 transitions, 1341 flow [2024-11-10 18:15:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2024-11-10 18:15:27,089 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6411411411411412 [2024-11-10 18:15:27,089 INFO L175 Difference]: Start difference. First operand has 136 places, 128 transitions, 679 flow. Second operand 6 states and 427 transitions. [2024-11-10 18:15:27,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 192 transitions, 1341 flow [2024-11-10 18:15:27,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 192 transitions, 1325 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:15:27,143 INFO L231 Difference]: Finished difference. Result has 140 places, 132 transitions, 737 flow [2024-11-10 18:15:27,143 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=737, PETRI_PLACES=140, PETRI_TRANSITIONS=132} [2024-11-10 18:15:27,144 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 41 predicate places. [2024-11-10 18:15:27,144 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 132 transitions, 737 flow [2024-11-10 18:15:27,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 18:15:27,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:27,145 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] [2024-11-10 18:15:27,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 18:15:27,145 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:27,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash 760568981, now seen corresponding path program 1 times [2024-11-10 18:15:27,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:27,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833811063] [2024-11-10 18:15:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:27,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:27,618 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 18:15:27,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833811063] [2024-11-10 18:15:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833811063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:27,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755405696] [2024-11-10 18:15:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:27,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:27,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:27,621 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 18:15:27,622 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 18:15:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:27,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:15:27,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:27,720 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 18:15:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:27,790 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 18:15:27,798 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:15:27,798 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 18:15:27,866 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 18:15:27,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:28,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:15:28,065 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 18:15:28,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755405696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:28,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:28,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-10 18:15:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424377149] [2024-11-10 18:15:28,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:28,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:15:28,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:15:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:15:32,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:15:36,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:15:40,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:15:44,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:15:48,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:15:52,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:15:56,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:16:00,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:16:04,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:16:09,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:16:13,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]