./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-subst.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-subst.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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:14:45,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:14:45,596 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:14:45,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:14:45,601 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:14:45,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:14:45,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:14:45,627 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:14:45,628 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:14:45,628 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:14:45,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:14:45,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:14:45,630 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:14:45,630 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:14:45,630 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:14:45,631 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:14:45,631 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:14:45,631 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:14:45,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:14:45,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:14:45,633 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:14:45,633 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:14:45,634 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:14:45,634 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:14:45,634 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:14:45,635 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:14:45,635 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:14:45,635 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:14:45,636 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:14:45,636 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:14:45,637 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:14:45,637 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:14:45,641 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:14:45,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:14:45,646 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:14:45,646 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:14:45,646 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:14:45,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:14:45,647 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:14:45,647 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:14:45,647 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:14:45,648 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:14:45,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2024-11-10 18:14:45,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:14:46,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:14:46,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:14:46,018 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:14:46,019 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:14:46,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-10 18:14:47,562 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:14:47,798 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:14:47,799 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-10 18:14:47,808 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3660fd3ed/31194193672842a79c2885b0f70956a1/FLAG9e5bf8368 [2024-11-10 18:14:47,824 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3660fd3ed/31194193672842a79c2885b0f70956a1 [2024-11-10 18:14:47,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:14:47,831 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:14:47,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:14:47,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:14:47,838 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:14:47,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:14:47" (1/1) ... [2024-11-10 18:14:47,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c88a17e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:47, skipping insertion in model container [2024-11-10 18:14:47,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:14:47" (1/1) ... [2024-11-10 18:14:47,862 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:14:48,125 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 18:14:48,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:14:48,143 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:14:48,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:14:48,218 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:14:48,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48 WrapperNode [2024-11-10 18:14:48,219 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:14:48,221 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:14:48,221 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:14:48,222 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:14:48,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,241 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,274 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 168 [2024-11-10 18:14:48,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:14:48,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:14:48,282 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:14:48,282 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:14:48,294 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,298 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,328 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 18:14:48,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,344 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,354 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:14:48,361 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:14:48,362 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:14:48,362 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:14:48,363 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (1/1) ... [2024-11-10 18:14:48,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:14:48,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:48,398 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 18:14:48,401 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 18:14:48,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:14:48,450 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:14:48,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:14:48,450 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:14:48,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:14:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:14:48,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:14:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:14:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:14:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:14:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:14:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:14:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:14:48,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:14:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:14:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:14:48,456 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 18:14:48,646 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:14:48,648 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:14:49,221 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:14:49,221 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:14:49,507 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:14:49,507 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:14:49,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:14:49 BoogieIcfgContainer [2024-11-10 18:14:49,508 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:14:49,510 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:14:49,511 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:14:49,515 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:14:49,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:14:47" (1/3) ... [2024-11-10 18:14:49,516 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@873d1cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:14:49, skipping insertion in model container [2024-11-10 18:14:49,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:14:48" (2/3) ... [2024-11-10 18:14:49,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@873d1cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:14:49, skipping insertion in model container [2024-11-10 18:14:49,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:14:49" (3/3) ... [2024-11-10 18:14:49,518 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2024-11-10 18:14:49,539 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:14:49,539 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-10 18:14:49,539 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:14:49,666 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:14:49,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 111 transitions, 243 flow [2024-11-10 18:14:49,765 INFO L124 PetriNetUnfolderBase]: 18/108 cut-off events. [2024-11-10 18:14:49,766 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:14:49,776 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 322 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 18:14:49,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 111 transitions, 243 flow [2024-11-10 18:14:49,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 232 flow [2024-11-10 18:14:49,802 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:14:49,813 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;@4e572102, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:14:49,813 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-10 18:14:49,819 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:14:49,820 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:14:49,820 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:14:49,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:49,822 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:14:49,823 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 18:14:49,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash 21900443, now seen corresponding path program 1 times [2024-11-10 18:14:49,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:49,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979367295] [2024-11-10 18:14:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:49,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:50,144 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 18:14:50,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:50,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979367295] [2024-11-10 18:14:50,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979367295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:50,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:50,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:14:50,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473107605] [2024-11-10 18:14:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:50,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:14:50,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:50,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:14:50,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:14:50,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-10 18:14:50,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:50,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:50,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-10 18:14:50,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:51,000 INFO L124 PetriNetUnfolderBase]: 2426/4508 cut-off events. [2024-11-10 18:14:51,000 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2024-11-10 18:14:51,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4508 events. 2426/4508 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30949 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 18:14:51,054 INFO L140 encePairwiseOnDemand]: 99/111 looper letters, 42 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-11-10 18:14:51,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 96 transitions, 298 flow [2024-11-10 18:14:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:14:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:14:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2024-11-10 18:14:51,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-10 18:14:51,071 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 232 flow. Second operand 3 states and 222 transitions. [2024-11-10 18:14:51,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 96 transitions, 298 flow [2024-11-10 18:14:51,081 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 18:14:51,086 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 202 flow [2024-11-10 18:14:51,089 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 18:14:51,095 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2024-11-10 18:14:51,096 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 202 flow [2024-11-10 18:14:51,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:51,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:51,097 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:14:51,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:14:51,098 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 18:14:51,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:51,099 INFO L85 PathProgramCache]: Analyzing trace with hash 21900444, now seen corresponding path program 1 times [2024-11-10 18:14:51,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:51,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708912928] [2024-11-10 18:14:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:51,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:51,512 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 18:14:51,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:51,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708912928] [2024-11-10 18:14:51,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708912928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:51,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:51,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:14:51,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922098440] [2024-11-10 18:14:51,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:51,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:51,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:51,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:51,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:14:51,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-10 18:14:51,615 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 18:14:51,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:51,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-10 18:14:51,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:52,165 INFO L124 PetriNetUnfolderBase]: 2427/4513 cut-off events. [2024-11-10 18:14:52,165 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-10 18:14:52,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7770 conditions, 4513 events. 2427/4513 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30944 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 18:14:52,267 INFO L140 encePairwiseOnDemand]: 106/111 looper letters, 46 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-11-10 18:14:52,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 99 transitions, 308 flow [2024-11-10 18:14:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:14:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:14:52,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 275 transitions. [2024-11-10 18:14:52,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6193693693693694 [2024-11-10 18:14:52,274 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 202 flow. Second operand 4 states and 275 transitions. [2024-11-10 18:14:52,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 99 transitions, 308 flow [2024-11-10 18:14:52,275 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 18:14:52,279 INFO L231 Difference]: Finished difference. Result has 93 places, 99 transitions, 225 flow [2024-11-10 18:14:52,281 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 18:14:52,281 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -6 predicate places. [2024-11-10 18:14:52,282 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 99 transitions, 225 flow [2024-11-10 18:14:52,282 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 18:14:52,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:52,283 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:14:52,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:14:52,284 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 18:14:52,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash -398182745, now seen corresponding path program 1 times [2024-11-10 18:14:52,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:52,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574300546] [2024-11-10 18:14:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:52,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:52,610 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 18:14:52,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:52,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574300546] [2024-11-10 18:14:52,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574300546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:52,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138854168] [2024-11-10 18:14:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:52,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:52,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:52,614 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 18:14:52,616 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 18:14:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:52,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:14:52,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:52,790 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 18:14:53,085 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 18:14:53,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:53,279 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 18:14:53,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138854168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:53,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:53,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:14:53,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226672736] [2024-11-10 18:14:53,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:53,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:14:53,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:14:53,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:14:53,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-10 18:14:53,909 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 18:14:53,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:53,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-10 18:14:53,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:54,661 INFO L124 PetriNetUnfolderBase]: 2428/4517 cut-off events. [2024-11-10 18:14:54,662 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-10 18:14:54,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7794 conditions, 4517 events. 2428/4517 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30932 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 18:14:54,717 INFO L140 encePairwiseOnDemand]: 102/111 looper letters, 43 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-11-10 18:14:54,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 103 transitions, 351 flow [2024-11-10 18:14:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:14:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:14:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 536 transitions. [2024-11-10 18:14:54,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5365365365365365 [2024-11-10 18:14:54,727 INFO L175 Difference]: Start difference. First operand has 93 places, 99 transitions, 225 flow. Second operand 9 states and 536 transitions. [2024-11-10 18:14:54,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 103 transitions, 351 flow [2024-11-10 18:14:54,728 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 18:14:54,731 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 258 flow [2024-11-10 18:14:54,732 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 18:14:54,733 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2024-11-10 18:14:54,733 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 258 flow [2024-11-10 18:14:54,734 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 18:14:54,734 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:54,735 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:54,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:14:54,938 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 18:14:54,940 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 18:14:54,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash -399305514, now seen corresponding path program 1 times [2024-11-10 18:14:54,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:54,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505654416] [2024-11-10 18:14:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:54,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:55,155 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 18:14:55,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:55,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505654416] [2024-11-10 18:14:55,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505654416] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:55,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:55,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:55,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104468524] [2024-11-10 18:14:55,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:55,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:55,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:55,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:55,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:55,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-10 18:14:55,362 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 18:14:55,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:55,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-10 18:14:55,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:55,880 INFO L124 PetriNetUnfolderBase]: 2429/4522 cut-off events. [2024-11-10 18:14:55,880 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-10 18:14:55,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7811 conditions, 4522 events. 2429/4522 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30939 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 18:14:55,925 INFO L140 encePairwiseOnDemand]: 103/111 looper letters, 47 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2024-11-10 18:14:55,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 104 transitions, 376 flow [2024-11-10 18:14:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:14:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:14:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 333 transitions. [2024-11-10 18:14:55,996 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-10 18:14:55,996 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 258 flow. Second operand 5 states and 333 transitions. [2024-11-10 18:14:55,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 104 transitions, 376 flow [2024-11-10 18:14:55,998 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 18:14:56,000 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 258 flow [2024-11-10 18:14:56,001 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 18:14:56,001 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2024-11-10 18:14:56,002 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 258 flow [2024-11-10 18:14:56,002 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 18:14:56,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:56,002 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:56,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:14:56,003 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 18:14:56,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:56,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1349481305, now seen corresponding path program 1 times [2024-11-10 18:14:56,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:56,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55132655] [2024-11-10 18:14:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:56,281 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 18:14:56,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55132655] [2024-11-10 18:14:56,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55132655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191895587] [2024-11-10 18:14:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:56,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:56,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:56,284 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 18:14:56,286 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 18:14:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:56,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:14:56,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:56,388 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 18:14:56,589 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 18:14:56,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:56,818 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 18:14:56,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191895587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:56,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:56,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:14:56,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389750480] [2024-11-10 18:14:56,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:56,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:14:56,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:56,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:14:56,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:14:57,965 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-10 18:14:57,967 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 18:14:57,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:57,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-10 18:14:57,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:58,857 INFO L124 PetriNetUnfolderBase]: 2430/4526 cut-off events. [2024-11-10 18:14:58,858 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-11-10 18:14:58,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7820 conditions, 4526 events. 2430/4526 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31025 event pairs, 1460 based on Foata normal form. 0/2975 useless extension candidates. Maximal degree in co-relation 7752. Up to 3193 conditions per place. [2024-11-10 18:14:58,896 INFO L140 encePairwiseOnDemand]: 101/111 looper letters, 44 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-11-10 18:14:58,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 402 flow [2024-11-10 18:14:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:14:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:14:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 596 transitions. [2024-11-10 18:14:58,899 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5369369369369369 [2024-11-10 18:14:58,899 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 258 flow. Second operand 10 states and 596 transitions. [2024-11-10 18:14:58,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 402 flow [2024-11-10 18:14:58,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 110 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:58,903 INFO L231 Difference]: Finished difference. Result has 104 places, 106 transitions, 300 flow [2024-11-10 18:14:58,903 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=10, PETRI_FLOW=300, PETRI_PLACES=104, PETRI_TRANSITIONS=106} [2024-11-10 18:14:58,904 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 5 predicate places. [2024-11-10 18:14:58,904 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 106 transitions, 300 flow [2024-11-10 18:14:58,905 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 18:14:58,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:58,905 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:58,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 18:14:59,109 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 18:14:59,110 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 18:14:59,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1349179805, now seen corresponding path program 1 times [2024-11-10 18:14:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:59,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951142676] [2024-11-10 18:14:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:59,325 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 18:14:59,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:59,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951142676] [2024-11-10 18:14:59,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951142676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:59,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:59,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:59,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701981632] [2024-11-10 18:14:59,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:59,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:59,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:59,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:59,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-10 18:14:59,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 300 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 18:14:59,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:59,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-10 18:14:59,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:59,950 INFO L124 PetriNetUnfolderBase]: 2431/4531 cut-off events. [2024-11-10 18:14:59,950 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-11-10 18:14:59,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7840 conditions, 4531 events. 2431/4531 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31056 event pairs, 1460 based on Foata normal form. 0/2981 useless extension candidates. Maximal degree in co-relation 7762. Up to 3206 conditions per place. [2024-11-10 18:14:59,990 INFO L140 encePairwiseOnDemand]: 102/111 looper letters, 50 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2024-11-10 18:14:59,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 109 transitions, 428 flow [2024-11-10 18:14:59,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:14:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:14:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 332 transitions. [2024-11-10 18:14:59,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5981981981981982 [2024-11-10 18:14:59,992 INFO L175 Difference]: Start difference. First operand has 104 places, 106 transitions, 300 flow. Second operand 5 states and 332 transitions. [2024-11-10 18:14:59,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 109 transitions, 428 flow [2024-11-10 18:14:59,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 109 transitions, 386 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-10 18:14:59,997 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 306 flow [2024-11-10 18:14:59,998 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2024-11-10 18:14:59,998 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 4 predicate places. [2024-11-10 18:14:59,998 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 306 flow [2024-11-10 18:14:59,999 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 18:14:59,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:59,999 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:59,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:15:00,000 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 18:15:00,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:00,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1112250156, now seen corresponding path program 1 times [2024-11-10 18:15:00,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:00,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578993528] [2024-11-10 18:15:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:00,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:00,226 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 18:15:00,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:00,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578993528] [2024-11-10 18:15:00,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578993528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:00,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137850204] [2024-11-10 18:15:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:00,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:00,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:00,229 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 18:15:00,230 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 18:15:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:00,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:15:00,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:00,353 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 18:15:00,554 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 18:15:00,554 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:00,784 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 18:15:00,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137850204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:00,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:00,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:15:00,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328649579] [2024-11-10 18:15:00,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:00,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:15:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:00,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:15:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:15:01,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 111 [2024-11-10 18:15:01,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 306 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 18:15:01,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:01,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 111 [2024-11-10 18:15:01,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:02,451 INFO L124 PetriNetUnfolderBase]: 2431/4530 cut-off events. [2024-11-10 18:15:02,451 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-10 18:15:02,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 4530 events. 2431/4530 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 31049 event pairs, 1460 based on Foata normal form. 0/2981 useless extension candidates. Maximal degree in co-relation 7780. Up to 3197 conditions per place. [2024-11-10 18:15:02,484 INFO L140 encePairwiseOnDemand]: 101/111 looper letters, 44 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-11-10 18:15:02,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 110 transitions, 434 flow [2024-11-10 18:15:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:15:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:15:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 480 transitions. [2024-11-10 18:15:02,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-11-10 18:15:02,487 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 306 flow. Second operand 8 states and 480 transitions. [2024-11-10 18:15:02,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 110 transitions, 434 flow [2024-11-10 18:15:02,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 110 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:15:02,493 INFO L231 Difference]: Finished difference. Result has 107 places, 108 transitions, 334 flow [2024-11-10 18:15:02,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2024-11-10 18:15:02,494 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 8 predicate places. [2024-11-10 18:15:02,496 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 334 flow [2024-11-10 18:15:02,496 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 18:15:02,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:02,497 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:02,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:15:02,701 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 18:15:02,702 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:02,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1798433854, now seen corresponding path program 1 times [2024-11-10 18:15:02,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:02,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434042310] [2024-11-10 18:15:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:02,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:02,804 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 18:15:02,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:02,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434042310] [2024-11-10 18:15:02,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434042310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:02,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:02,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:15:02,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769938511] [2024-11-10 18:15:02,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:02,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:02,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:02,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:02,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:02,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 334 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 18:15:02,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:02,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:02,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:03,654 INFO L124 PetriNetUnfolderBase]: 4370/8403 cut-off events. [2024-11-10 18:15:03,654 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2024-11-10 18:15:03,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14427 conditions, 8403 events. 4370/8403 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 65614 event pairs, 2486 based on Foata normal form. 114/5827 useless extension candidates. Maximal degree in co-relation 8806. Up to 3609 conditions per place. [2024-11-10 18:15:03,717 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 127 selfloop transitions, 6 changer transitions 0/178 dead transitions. [2024-11-10 18:15:03,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 178 transitions, 803 flow [2024-11-10 18:15:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 443 transitions. [2024-11-10 18:15:03,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6651651651651652 [2024-11-10 18:15:03,719 INFO L175 Difference]: Start difference. First operand has 107 places, 108 transitions, 334 flow. Second operand 6 states and 443 transitions. [2024-11-10 18:15:03,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 178 transitions, 803 flow [2024-11-10 18:15:03,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 178 transitions, 735 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-10 18:15:03,724 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 327 flow [2024-11-10 18:15:03,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-11-10 18:15:03,728 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 9 predicate places. [2024-11-10 18:15:03,729 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 327 flow [2024-11-10 18:15:03,729 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 18:15:03,729 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:03,730 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 18:15:03,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:15:03,730 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:03,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1052641359, now seen corresponding path program 1 times [2024-11-10 18:15:03,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:03,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286113380] [2024-11-10 18:15:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:03,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:03,812 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 18:15:03,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:03,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286113380] [2024-11-10 18:15:03,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286113380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:03,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:03,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:15:03,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106625176] [2024-11-10 18:15:03,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:03,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:03,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:03,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:03,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:03,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:03,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 327 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 18:15:03,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:03,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:03,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:04,507 INFO L124 PetriNetUnfolderBase]: 3820/7332 cut-off events. [2024-11-10 18:15:04,508 INFO L125 PetriNetUnfolderBase]: For 807/915 co-relation queries the response was YES. [2024-11-10 18:15:04,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13277 conditions, 7332 events. 3820/7332 cut-off events. For 807/915 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 55471 event pairs, 2255 based on Foata normal form. 87/5382 useless extension candidates. Maximal degree in co-relation 9170. Up to 3637 conditions per place. [2024-11-10 18:15:04,570 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 120 selfloop transitions, 6 changer transitions 0/171 dead transitions. [2024-11-10 18:15:04,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 171 transitions, 743 flow [2024-11-10 18:15:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 436 transitions. [2024-11-10 18:15:04,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6546546546546547 [2024-11-10 18:15:04,573 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 327 flow. Second operand 6 states and 436 transitions. [2024-11-10 18:15:04,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 171 transitions, 743 flow [2024-11-10 18:15:04,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 171 transitions, 741 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:15:04,578 INFO L231 Difference]: Finished difference. Result has 114 places, 113 transitions, 352 flow [2024-11-10 18:15:04,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=114, PETRI_TRANSITIONS=113} [2024-11-10 18:15:04,580 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 15 predicate places. [2024-11-10 18:15:04,580 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 113 transitions, 352 flow [2024-11-10 18:15:04,580 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 18:15:04,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:04,581 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 18:15:04,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:15:04,581 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:04,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:04,582 INFO L85 PathProgramCache]: Analyzing trace with hash -284541495, now seen corresponding path program 1 times [2024-11-10 18:15:04,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:04,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446230089] [2024-11-10 18:15:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:04,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:04,694 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 18:15:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:04,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446230089] [2024-11-10 18:15:04,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446230089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:04,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:04,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:15:04,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319451846] [2024-11-10 18:15:04,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:04,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:04,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:04,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:04,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:04,746 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:04,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 113 transitions, 352 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 18:15:04,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:04,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:04,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:05,957 INFO L124 PetriNetUnfolderBase]: 6295/13431 cut-off events. [2024-11-10 18:15:05,958 INFO L125 PetriNetUnfolderBase]: For 3013/3057 co-relation queries the response was YES. [2024-11-10 18:15:06,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24646 conditions, 13431 events. 6295/13431 cut-off events. For 3013/3057 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 122955 event pairs, 3617 based on Foata normal form. 114/9861 useless extension candidates. Maximal degree in co-relation 17847. Up to 4897 conditions per place. [2024-11-10 18:15:06,077 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 124 selfloop transitions, 10 changer transitions 0/179 dead transitions. [2024-11-10 18:15:06,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 179 transitions, 806 flow [2024-11-10 18:15:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 439 transitions. [2024-11-10 18:15:06,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6591591591591591 [2024-11-10 18:15:06,082 INFO L175 Difference]: Start difference. First operand has 114 places, 113 transitions, 352 flow. Second operand 6 states and 439 transitions. [2024-11-10 18:15:06,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 179 transitions, 806 flow [2024-11-10 18:15:06,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 179 transitions, 799 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:15:06,097 INFO L231 Difference]: Finished difference. Result has 119 places, 118 transitions, 413 flow [2024-11-10 18:15:06,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=119, PETRI_TRANSITIONS=118} [2024-11-10 18:15:06,099 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 20 predicate places. [2024-11-10 18:15:06,099 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 118 transitions, 413 flow [2024-11-10 18:15:06,100 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 18:15:06,100 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:06,100 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 18:15:06,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:15:06,100 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:06,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:06,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1440687907, now seen corresponding path program 1 times [2024-11-10 18:15:06,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:06,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919540492] [2024-11-10 18:15:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:06,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:06,193 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 18:15:06,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:06,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919540492] [2024-11-10 18:15:06,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919540492] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:06,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:06,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:15:06,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434172839] [2024-11-10 18:15:06,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:06,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:06,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:06,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:06,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:06,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 118 transitions, 413 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 18:15:06,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:06,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:06,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:07,045 INFO L124 PetriNetUnfolderBase]: 5696/11331 cut-off events. [2024-11-10 18:15:07,045 INFO L125 PetriNetUnfolderBase]: For 5507/5790 co-relation queries the response was YES. [2024-11-10 18:15:07,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22700 conditions, 11331 events. 5696/11331 cut-off events. For 5507/5790 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 92999 event pairs, 3504 based on Foata normal form. 134/8799 useless extension candidates. Maximal degree in co-relation 16338. Up to 5092 conditions per place. [2024-11-10 18:15:07,149 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 120 selfloop transitions, 8 changer transitions 0/173 dead transitions. [2024-11-10 18:15:07,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 849 flow [2024-11-10 18:15:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 431 transitions. [2024-11-10 18:15:07,151 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6471471471471472 [2024-11-10 18:15:07,152 INFO L175 Difference]: Start difference. First operand has 119 places, 118 transitions, 413 flow. Second operand 6 states and 431 transitions. [2024-11-10 18:15:07,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 849 flow [2024-11-10 18:15:07,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 173 transitions, 845 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:15:07,175 INFO L231 Difference]: Finished difference. Result has 125 places, 120 transitions, 440 flow [2024-11-10 18:15:07,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=440, PETRI_PLACES=125, PETRI_TRANSITIONS=120} [2024-11-10 18:15:07,177 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 26 predicate places. [2024-11-10 18:15:07,177 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 120 transitions, 440 flow [2024-11-10 18:15:07,177 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 18:15:07,177 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:07,177 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 18:15:07,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:15:07,177 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:07,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:07,178 INFO L85 PathProgramCache]: Analyzing trace with hash 768090906, now seen corresponding path program 1 times [2024-11-10 18:15:07,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:07,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968965579] [2024-11-10 18:15:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:07,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:07,312 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 18:15:07,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:07,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968965579] [2024-11-10 18:15:07,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968965579] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:07,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:07,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:15:07,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345706867] [2024-11-10 18:15:07,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:07,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:07,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:07,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:07,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:07,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 120 transitions, 440 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 18:15:07,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:07,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:07,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:08,956 INFO L124 PetriNetUnfolderBase]: 9798/20406 cut-off events. [2024-11-10 18:15:08,956 INFO L125 PetriNetUnfolderBase]: For 12126/12301 co-relation queries the response was YES. [2024-11-10 18:15:09,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42205 conditions, 20406 events. 9798/20406 cut-off events. For 12126/12301 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 191172 event pairs, 5946 based on Foata normal form. 184/16590 useless extension candidates. Maximal degree in co-relation 30243. Up to 7672 conditions per place. [2024-11-10 18:15:09,079 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 135 selfloop transitions, 10 changer transitions 0/190 dead transitions. [2024-11-10 18:15:09,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 190 transitions, 1010 flow [2024-11-10 18:15:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 434 transitions. [2024-11-10 18:15:09,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6516516516516516 [2024-11-10 18:15:09,082 INFO L175 Difference]: Start difference. First operand has 125 places, 120 transitions, 440 flow. Second operand 6 states and 434 transitions. [2024-11-10 18:15:09,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 190 transitions, 1010 flow [2024-11-10 18:15:09,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 190 transitions, 999 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:15:09,143 INFO L231 Difference]: Finished difference. Result has 130 places, 125 transitions, 497 flow [2024-11-10 18:15:09,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=497, PETRI_PLACES=130, PETRI_TRANSITIONS=125} [2024-11-10 18:15:09,144 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 31 predicate places. [2024-11-10 18:15:09,145 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 125 transitions, 497 flow [2024-11-10 18:15:09,145 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 18:15:09,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:09,145 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] [2024-11-10 18:15:09,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:15:09,146 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:09,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:09,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1909288880, now seen corresponding path program 1 times [2024-11-10 18:15:09,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:09,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407782842] [2024-11-10 18:15:09,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:09,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:15:09,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:09,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407782842] [2024-11-10 18:15:09,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407782842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:09,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:09,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:15:09,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251991797] [2024-11-10 18:15:09,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:09,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:15:09,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:15:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:15:09,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 111 [2024-11-10 18:15:09,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 125 transitions, 497 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:15:09,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:09,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 111 [2024-11-10 18:15:09,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:11,177 INFO L124 PetriNetUnfolderBase]: 11427/22576 cut-off events. [2024-11-10 18:15:11,177 INFO L125 PetriNetUnfolderBase]: For 18068/18444 co-relation queries the response was YES. [2024-11-10 18:15:11,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49278 conditions, 22576 events. 11427/22576 cut-off events. For 18068/18444 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 202190 event pairs, 7878 based on Foata normal form. 0/18764 useless extension candidates. Maximal degree in co-relation 34259. Up to 15640 conditions per place. [2024-11-10 18:15:11,327 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 71 selfloop transitions, 6 changer transitions 0/121 dead transitions. [2024-11-10 18:15:11,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 121 transitions, 643 flow [2024-11-10 18:15:11,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:15:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:15:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 292 transitions. [2024-11-10 18:15:11,329 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5261261261261261 [2024-11-10 18:15:11,329 INFO L175 Difference]: Start difference. First operand has 130 places, 125 transitions, 497 flow. Second operand 5 states and 292 transitions. [2024-11-10 18:15:11,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 121 transitions, 643 flow [2024-11-10 18:15:11,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 121 transitions, 639 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:15:11,381 INFO L231 Difference]: Finished difference. Result has 129 places, 121 transitions, 497 flow [2024-11-10 18:15:11,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=497, PETRI_PLACES=129, PETRI_TRANSITIONS=121} [2024-11-10 18:15:11,382 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 30 predicate places. [2024-11-10 18:15:11,382 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 121 transitions, 497 flow [2024-11-10 18:15:11,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:15:11,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:11,383 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 18:15:11,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:15:11,383 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:11,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:11,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1909288881, now seen corresponding path program 1 times [2024-11-10 18:15:11,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:11,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388369131] [2024-11-10 18:15:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:11,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:11,783 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 18:15:11,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388369131] [2024-11-10 18:15:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388369131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193226710] [2024-11-10 18:15:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:11,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:11,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:11,786 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 18:15:11,788 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 18:15:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:11,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:15:11,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:11,892 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 18:15:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:11,969 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 18:15:12,000 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-10 18:15:12,001 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 18:15:12,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:12,067 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 18:15:12,078 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:15:12,079 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 18:15:12,255 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 18:15:12,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:12,577 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 100 treesize of output 96 [2024-11-10 18:15:12,782 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 18:15:12,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193226710] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:12,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:12,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2024-11-10 18:15:12,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536461687] [2024-11-10 18:15:12,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:12,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-10 18:15:12,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:12,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-10 18:15:12,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-10 18:15:14,533 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2024-11-10 18:15:14,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 121 transitions, 497 flow. Second operand has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 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 18:15:14,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:14,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2024-11-10 18:15:14,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:17,282 INFO L124 PetriNetUnfolderBase]: 15536/29185 cut-off events. [2024-11-10 18:15:17,282 INFO L125 PetriNetUnfolderBase]: For 21379/22391 co-relation queries the response was YES. [2024-11-10 18:15:17,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63993 conditions, 29185 events. 15536/29185 cut-off events. For 21379/22391 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 253624 event pairs, 6597 based on Foata normal form. 0/24012 useless extension candidates. Maximal degree in co-relation 46864. Up to 8137 conditions per place. [2024-11-10 18:15:17,534 INFO L140 encePairwiseOnDemand]: 98/111 looper letters, 154 selfloop transitions, 24 changer transitions 0/220 dead transitions. [2024-11-10 18:15:17,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 220 transitions, 1187 flow [2024-11-10 18:15:17,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:15:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:15:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 568 transitions. [2024-11-10 18:15:17,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5685685685685685 [2024-11-10 18:15:17,537 INFO L175 Difference]: Start difference. First operand has 129 places, 121 transitions, 497 flow. Second operand 9 states and 568 transitions. [2024-11-10 18:15:17,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 220 transitions, 1187 flow [2024-11-10 18:15:17,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 220 transitions, 1175 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:15:17,788 INFO L231 Difference]: Finished difference. Result has 135 places, 130 transitions, 605 flow [2024-11-10 18:15:17,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=605, PETRI_PLACES=135, PETRI_TRANSITIONS=130} [2024-11-10 18:15:17,790 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 36 predicate places. [2024-11-10 18:15:17,790 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 130 transitions, 605 flow [2024-11-10 18:15:17,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 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 18:15:17,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:17,791 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 18:15:17,812 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 18:15:17,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:17,996 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:17,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash -941586172, now seen corresponding path program 1 times [2024-11-10 18:15:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:17,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988518500] [2024-11-10 18:15:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:18,117 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 18:15:18,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988518500] [2024-11-10 18:15:18,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988518500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:18,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:18,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:15:18,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721767309] [2024-11-10 18:15:18,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:18,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:15:18,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:15:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:15:18,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 111 [2024-11-10 18:15:18,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 130 transitions, 605 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 18:15:18,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:18,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 111 [2024-11-10 18:15:18,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:20,294 INFO L124 PetriNetUnfolderBase]: 14670/27544 cut-off events. [2024-11-10 18:15:20,294 INFO L125 PetriNetUnfolderBase]: For 31566/32386 co-relation queries the response was YES. [2024-11-10 18:15:20,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65043 conditions, 27544 events. 14670/27544 cut-off events. For 31566/32386 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 236293 event pairs, 10017 based on Foata normal form. 4/24437 useless extension candidates. Maximal degree in co-relation 47592. Up to 19886 conditions per place. [2024-11-10 18:15:20,720 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 75 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2024-11-10 18:15:20,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 126 transitions, 767 flow [2024-11-10 18:15:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:15:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:15:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 296 transitions. [2024-11-10 18:15:20,724 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-10 18:15:20,724 INFO L175 Difference]: Start difference. First operand has 135 places, 130 transitions, 605 flow. Second operand 5 states and 296 transitions. [2024-11-10 18:15:20,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 126 transitions, 767 flow [2024-11-10 18:15:20,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 126 transitions, 751 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-10 18:15:20,825 INFO L231 Difference]: Finished difference. Result has 133 places, 126 transitions, 601 flow [2024-11-10 18:15:20,825 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=601, PETRI_PLACES=133, PETRI_TRANSITIONS=126} [2024-11-10 18:15:20,827 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 34 predicate places. [2024-11-10 18:15:20,827 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 126 transitions, 601 flow [2024-11-10 18:15:20,827 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 18:15:20,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:20,828 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 18:15:20,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 18:15:20,828 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:20,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:20,829 INFO L85 PathProgramCache]: Analyzing trace with hash -941586171, now seen corresponding path program 1 times [2024-11-10 18:15:20,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:20,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801535352] [2024-11-10 18:15:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:20,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:21,088 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 18:15:21,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801535352] [2024-11-10 18:15:21,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801535352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192339814] [2024-11-10 18:15:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:21,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:21,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:21,092 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 18:15:21,094 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 18:15:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:21,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:15:21,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:21,204 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 18:15:21,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:21,278 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 18:15:21,284 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:15:21,285 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 18:15:21,349 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 18:15:21,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:21,504 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 18:15:21,587 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 18:15:21,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192339814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:21,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:21,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-10 18:15:21,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634845159] [2024-11-10 18:15:21,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:21,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:15:21,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:15:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:15:26,194 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 18:15:30,426 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 18:15:30,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 111 [2024-11-10 18:15:30,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 126 transitions, 601 flow. Second operand has 13 states, 13 states have (on average 54.07692307692308) internal successors, (703), 13 states have internal predecessors, (703), 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 18:15:30,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:30,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 111 [2024-11-10 18:15:30,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:32,980 INFO L124 PetriNetUnfolderBase]: 13563/24583 cut-off events. [2024-11-10 18:15:32,980 INFO L125 PetriNetUnfolderBase]: For 24920/25893 co-relation queries the response was YES. [2024-11-10 18:15:33,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57584 conditions, 24583 events. 13563/24583 cut-off events. For 24920/25893 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 201985 event pairs, 6228 based on Foata normal form. 110/21884 useless extension candidates. Maximal degree in co-relation 40673. Up to 7634 conditions per place. [2024-11-10 18:15:33,190 INFO L140 encePairwiseOnDemand]: 98/111 looper letters, 150 selfloop transitions, 30 changer transitions 0/220 dead transitions. [2024-11-10 18:15:33,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 220 transitions, 1331 flow [2024-11-10 18:15:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:15:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:15:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 612 transitions. [2024-11-10 18:15:33,194 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2024-11-10 18:15:33,194 INFO L175 Difference]: Start difference. First operand has 133 places, 126 transitions, 601 flow. Second operand 9 states and 612 transitions. [2024-11-10 18:15:33,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 220 transitions, 1331 flow [2024-11-10 18:15:33,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 220 transitions, 1311 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:15:33,282 INFO L231 Difference]: Finished difference. Result has 139 places, 132 transitions, 716 flow [2024-11-10 18:15:33,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=716, PETRI_PLACES=139, PETRI_TRANSITIONS=132} [2024-11-10 18:15:33,283 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 40 predicate places. [2024-11-10 18:15:33,283 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 132 transitions, 716 flow [2024-11-10 18:15:33,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.07692307692308) internal successors, (703), 13 states have internal predecessors, (703), 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 18:15:33,284 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:33,284 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 18:15:33,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 18:15:33,488 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,SelfDestructingSolverStorable15 [2024-11-10 18:15:33,489 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:33,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash 866760065, now seen corresponding path program 1 times [2024-11-10 18:15:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:33,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607766003] [2024-11-10 18:15:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:33,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:33,602 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 18:15:33,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:33,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607766003] [2024-11-10 18:15:33,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607766003] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:33,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:33,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:15:33,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983090461] [2024-11-10 18:15:33,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:33,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:15:33,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:33,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:15:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:15:33,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 111 [2024-11-10 18:15:33,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 132 transitions, 716 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 18:15:33,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:33,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 111 [2024-11-10 18:15:33,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:35,484 INFO L124 PetriNetUnfolderBase]: 10896/20364 cut-off events. [2024-11-10 18:15:35,484 INFO L125 PetriNetUnfolderBase]: For 31851/32411 co-relation queries the response was YES. [2024-11-10 18:15:35,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51255 conditions, 20364 events. 10896/20364 cut-off events. For 31851/32411 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 164931 event pairs, 6837 based on Foata normal form. 180/18369 useless extension candidates. Maximal degree in co-relation 38368. Up to 9281 conditions per place. [2024-11-10 18:15:35,700 INFO L140 encePairwiseOnDemand]: 104/111 looper letters, 141 selfloop transitions, 18 changer transitions 0/196 dead transitions. [2024-11-10 18:15:35,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 196 transitions, 1406 flow [2024-11-10 18:15:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:15:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:15:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2024-11-10 18:15:35,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6411411411411412 [2024-11-10 18:15:35,702 INFO L175 Difference]: Start difference. First operand has 139 places, 132 transitions, 716 flow. Second operand 6 states and 427 transitions. [2024-11-10 18:15:35,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 196 transitions, 1406 flow [2024-11-10 18:15:35,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 196 transitions, 1369 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-10 18:15:35,787 INFO L231 Difference]: Finished difference. Result has 143 places, 136 transitions, 777 flow [2024-11-10 18:15:35,787 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=777, PETRI_PLACES=143, PETRI_TRANSITIONS=136} [2024-11-10 18:15:35,787 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 44 predicate places. [2024-11-10 18:15:35,787 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 136 transitions, 777 flow [2024-11-10 18:15:35,788 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 18:15:35,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:35,788 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 18:15:35,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-10 18:15:35,788 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:35,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:35,789 INFO L85 PathProgramCache]: Analyzing trace with hash -240143308, now seen corresponding path program 1 times [2024-11-10 18:15:35,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:35,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257832797] [2024-11-10 18:15:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:35,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:15:36,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:36,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257832797] [2024-11-10 18:15:36,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257832797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:36,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381179154] [2024-11-10 18:15:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:36,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:36,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:36,348 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 18:15:36,349 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 18:15:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:36,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:15:36,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:36,451 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 18:15:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:36,515 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 18:15:36,530 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-10 18:15:36,531 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 18:15:36,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:36,568 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 18:15:36,578 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:15:36,579 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 18:15:36,661 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 18:15:36,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:36,969 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 100 treesize of output 96 [2024-11-10 18:15:37,171 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 18:15:37,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381179154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:37,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:37,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2024-11-10 18:15:37,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363261780] [2024-11-10 18:15:37,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:37,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-10 18:15:37,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-10 18:15:37,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-10 18:15:38,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2024-11-10 18:15:38,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 136 transitions, 777 flow. Second operand has 17 states, 17 states have (on average 48.11764705882353) internal successors, (818), 17 states have internal predecessors, (818), 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 18:15:38,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:38,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2024-11-10 18:15:38,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:41,999 INFO L124 PetriNetUnfolderBase]: 19118/33880 cut-off events. [2024-11-10 18:15:41,999 INFO L125 PetriNetUnfolderBase]: For 52791/55017 co-relation queries the response was YES. [2024-11-10 18:15:42,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84975 conditions, 33880 events. 19118/33880 cut-off events. For 52791/55017 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 275610 event pairs, 7763 based on Foata normal form. 0/29296 useless extension candidates. Maximal degree in co-relation 68578. Up to 10758 conditions per place. [2024-11-10 18:15:42,288 INFO L140 encePairwiseOnDemand]: 98/111 looper letters, 178 selfloop transitions, 30 changer transitions 0/245 dead transitions. [2024-11-10 18:15:42,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 245 transitions, 1699 flow [2024-11-10 18:15:42,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:15:42,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:15:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 566 transitions. [2024-11-10 18:15:42,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5665665665665666 [2024-11-10 18:15:42,290 INFO L175 Difference]: Start difference. First operand has 143 places, 136 transitions, 777 flow. Second operand 9 states and 566 transitions. [2024-11-10 18:15:42,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 245 transitions, 1699 flow [2024-11-10 18:15:42,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 245 transitions, 1673 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:15:42,438 INFO L231 Difference]: Finished difference. Result has 149 places, 139 transitions, 850 flow [2024-11-10 18:15:42,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=850, PETRI_PLACES=149, PETRI_TRANSITIONS=139} [2024-11-10 18:15:42,439 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 50 predicate places. [2024-11-10 18:15:42,439 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 139 transitions, 850 flow [2024-11-10 18:15:42,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 48.11764705882353) internal successors, (818), 17 states have internal predecessors, (818), 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 18:15:42,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:42,440 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:42,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 18:15:42,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 18:15:42,641 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:42,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1145492729, now seen corresponding path program 1 times [2024-11-10 18:15:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:42,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226125274] [2024-11-10 18:15:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:42,817 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 18:15:42,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:42,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226125274] [2024-11-10 18:15:42,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226125274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:42,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188111913] [2024-11-10 18:15:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:42,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:42,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:42,821 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:42,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:15:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:42,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:15:42,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:42,997 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 18:15:42,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:43,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 18:15:43,228 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 18:15:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188111913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:43,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:43,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-10 18:15:43,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058289752] [2024-11-10 18:15:43,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:43,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:15:43,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:15:43,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:15:43,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 111 [2024-11-10 18:15:43,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 139 transitions, 850 flow. Second operand has 11 states, 11 states have (on average 58.36363636363637) internal successors, (642), 11 states have internal predecessors, (642), 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 18:15:43,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:43,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 111 [2024-11-10 18:15:43,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:46,215 INFO L124 PetriNetUnfolderBase]: 14439/26521 cut-off events. [2024-11-10 18:15:46,215 INFO L125 PetriNetUnfolderBase]: For 51905/53605 co-relation queries the response was YES. [2024-11-10 18:15:46,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70952 conditions, 26521 events. 14439/26521 cut-off events. For 51905/53605 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 217336 event pairs, 6509 based on Foata normal form. 172/24909 useless extension candidates. Maximal degree in co-relation 54478. Up to 7688 conditions per place. [2024-11-10 18:15:46,424 INFO L140 encePairwiseOnDemand]: 98/111 looper letters, 161 selfloop transitions, 30 changer transitions 0/232 dead transitions. [2024-11-10 18:15:46,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 232 transitions, 1704 flow [2024-11-10 18:15:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:15:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:15:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 524 transitions. [2024-11-10 18:15:46,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6743886743886743 [2024-11-10 18:15:46,426 INFO L175 Difference]: Start difference. First operand has 149 places, 139 transitions, 850 flow. Second operand 7 states and 524 transitions. [2024-11-10 18:15:46,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 232 transitions, 1704 flow [2024-11-10 18:15:46,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 232 transitions, 1651 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-10 18:15:46,802 INFO L231 Difference]: Finished difference. Result has 150 places, 139 transitions, 878 flow [2024-11-10 18:15:46,803 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=878, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2024-11-10 18:15:46,803 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 51 predicate places. [2024-11-10 18:15:46,804 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 878 flow [2024-11-10 18:15:46,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 58.36363636363637) internal successors, (642), 11 states have internal predecessors, (642), 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 18:15:46,804 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:46,804 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:46,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 18:15:47,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:47,005 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:47,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1145492728, now seen corresponding path program 1 times [2024-11-10 18:15:47,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:47,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003784303] [2024-11-10 18:15:47,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:47,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:47,072 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 18:15:47,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:47,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003784303] [2024-11-10 18:15:47,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003784303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:15:47,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:15:47,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:15:47,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395130959] [2024-11-10 18:15:47,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:15:47,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:15:47,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:15:47,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:15:47,123 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 111 [2024-11-10 18:15:47,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 878 flow. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 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 18:15:47,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:15:47,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 111 [2024-11-10 18:15:47,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:15:49,672 INFO L124 PetriNetUnfolderBase]: 14882/26862 cut-off events. [2024-11-10 18:15:49,672 INFO L125 PetriNetUnfolderBase]: For 62975/64907 co-relation queries the response was YES. [2024-11-10 18:15:49,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75489 conditions, 26862 events. 14882/26862 cut-off events. For 62975/64907 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 214881 event pairs, 10009 based on Foata normal form. 571/25985 useless extension candidates. Maximal degree in co-relation 58390. Up to 20071 conditions per place. [2024-11-10 18:15:49,926 INFO L140 encePairwiseOnDemand]: 105/111 looper letters, 89 selfloop transitions, 9 changer transitions 0/135 dead transitions. [2024-11-10 18:15:49,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 135 transitions, 1066 flow [2024-11-10 18:15:49,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:15:49,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:15:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 250 transitions. [2024-11-10 18:15:49,927 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5630630630630631 [2024-11-10 18:15:49,927 INFO L175 Difference]: Start difference. First operand has 150 places, 139 transitions, 878 flow. Second operand 4 states and 250 transitions. [2024-11-10 18:15:49,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 135 transitions, 1066 flow [2024-11-10 18:15:50,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 135 transitions, 1011 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-10 18:15:50,033 INFO L231 Difference]: Finished difference. Result has 144 places, 135 transitions, 833 flow [2024-11-10 18:15:50,033 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=833, PETRI_PLACES=144, PETRI_TRANSITIONS=135} [2024-11-10 18:15:50,034 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 45 predicate places. [2024-11-10 18:15:50,034 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 135 transitions, 833 flow [2024-11-10 18:15:50,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 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 18:15:50,034 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:15:50,034 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:15:50,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-10 18:15:50,034 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-10 18:15:50,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:15:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1977321866, now seen corresponding path program 1 times [2024-11-10 18:15:50,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:15:50,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328735028] [2024-11-10 18:15:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:50,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:15:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:50,463 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 18:15:50,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:15:50,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328735028] [2024-11-10 18:15:50,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328735028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:15:50,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151015517] [2024-11-10 18:15:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:15:50,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:15:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:15:50,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:15:50,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:15:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:15:50,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:15:50,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:15:50,569 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 18:15:50,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:15:50,622 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 18:15:50,628 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:15:50,629 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 18:15:50,688 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 18:15:50,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:15:50,802 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 18:15:50,871 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 18:15:50,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151015517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:15:50,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:15:50,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-10 18:15:50,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883450929] [2024-11-10 18:15:50,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:15:50,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:15:50,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:15:50,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:15:50,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:15:54,989 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 18:15:59,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:16:03,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]