./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-node-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 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:47:08,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:47:08,512 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:47:08,517 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:47:08,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:47:08,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:47:08,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:47:08,548 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:47:08,548 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:47:08,549 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:47:08,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:47:08,551 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:47:08,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:47:08,552 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:47:08,552 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:47:08,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:47:08,555 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:47:08,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:47:08,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:47:08,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:47:08,556 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:47:08,557 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:47:08,557 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:47:08,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:47:08,558 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:47:08,558 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:47:08,558 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:47:08,559 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:47:08,559 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:47:08,559 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:47:08,560 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:47:08,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:47:08,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:47:08,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:47:08,562 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:47:08,562 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:47:08,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:47:08,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:47:08,563 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:47:08,563 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:47:08,563 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:47:08,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:47:08,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 [2024-11-09 10:47:08,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:47:08,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:47:08,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:47:08,838 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:47:08,839 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:47:08,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-11-09 10:47:10,365 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:47:10,554 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:47:10,556 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-11-09 10:47:10,565 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa399e191/dda472c553d04fd2b0a8ea1587fe2b40/FLAG488c5a76d [2024-11-09 10:47:10,928 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa399e191/dda472c553d04fd2b0a8ea1587fe2b40 [2024-11-09 10:47:10,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:47:10,931 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:47:10,932 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:47:10,932 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:47:10,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:47:10,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:47:10" (1/1) ... [2024-11-09 10:47:10,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3557060f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:10, skipping insertion in model container [2024-11-09 10:47:10,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:47:10" (1/1) ... [2024-11-09 10:47:10,967 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:47:11,212 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:47:11,224 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:47:11,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:47:11,239 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:47:11,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:47:11,293 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:47:11,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11 WrapperNode [2024-11-09 10:47:11,294 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:47:11,295 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:47:11,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:47:11,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:47:11,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,403 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 426 [2024-11-09 10:47:11,404 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:47:11,404 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:47:11,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:47:11,404 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:47:11,415 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,421 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,445 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 15, 9]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-11-09 10:47:11,449 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,449 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,483 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,485 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,495 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:47:11,496 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:47:11,496 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:47:11,496 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:47:11,497 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:47:11,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:11,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:47:11,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:47:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:47:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:47:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:47:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 10:47:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:47:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:47:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 10:47:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:47:11,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:47:11,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:47:11,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:47:11,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:47:11,579 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:47:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:47:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:47:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 10:47:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:47:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:47:11,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:47:11,582 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:47:11,692 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:47:11,695 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:47:12,349 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:47:12,350 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:47:12,812 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:47:12,812 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 10:47:12,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:47:12 BoogieIcfgContainer [2024-11-09 10:47:12,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:47:12,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:47:12,814 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:47:12,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:47:12,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:47:10" (1/3) ... [2024-11-09 10:47:12,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b53b996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:47:12, skipping insertion in model container [2024-11-09 10:47:12,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11" (2/3) ... [2024-11-09 10:47:12,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b53b996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:47:12, skipping insertion in model container [2024-11-09 10:47:12,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:47:12" (3/3) ... [2024-11-09 10:47:12,823 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2024-11-09 10:47:12,841 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:47:12,842 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-11-09 10:47:12,842 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:47:12,988 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:47:13,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 261 flow [2024-11-09 10:47:13,095 INFO L124 PetriNetUnfolderBase]: 12/117 cut-off events. [2024-11-09 10:47:13,095 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:47:13,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 12/117 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 402 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2024-11-09 10:47:13,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 261 flow [2024-11-09 10:47:13,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 116 transitions, 250 flow [2024-11-09 10:47:13,121 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:47:13,130 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;@6d0ea572, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:47:13,131 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2024-11-09 10:47:13,136 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:47:13,136 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:47:13,137 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:47:13,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:13,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:47:13,138 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:13,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1324850, now seen corresponding path program 1 times [2024-11-09 10:47:13,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:13,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771046335] [2024-11-09 10:47:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:13,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:47:13,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:13,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771046335] [2024-11-09 10:47:13,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771046335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:13,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:13,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:47:13,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356042788] [2024-11-09 10:47:13,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:13,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:47:13,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:13,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:47:13,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:47:13,599 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:13,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:13,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:13,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:13,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:14,400 INFO L124 PetriNetUnfolderBase]: 2205/4833 cut-off events. [2024-11-09 10:47:14,400 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-11-09 10:47:14,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 4833 events. 2205/4833 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39081 event pairs, 1390 based on Foata normal form. 1/3721 useless extension candidates. Maximal degree in co-relation 7419. Up to 2942 conditions per place. [2024-11-09 10:47:14,451 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 48 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-09 10:47:14,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 340 flow [2024-11-09 10:47:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:47:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:47:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-11-09 10:47:14,468 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-11-09 10:47:14,471 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 250 flow. Second operand 3 states and 249 transitions. [2024-11-09 10:47:14,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 340 flow [2024-11-09 10:47:14,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:47:14,489 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 232 flow [2024-11-09 10:47:14,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-11-09 10:47:14,498 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -9 predicate places. [2024-11-09 10:47:14,499 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 232 flow [2024-11-09 10:47:14,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:14,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:14,499 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:47:14,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:47:14,500 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:14,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1324851, now seen corresponding path program 1 times [2024-11-09 10:47:14,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:14,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239760837] [2024-11-09 10:47:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:14,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:47:14,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:14,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239760837] [2024-11-09 10:47:14,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239760837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:14,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:14,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:47:14,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067225918] [2024-11-09 10:47:14,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:14,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:14,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:14,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:14,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:47:14,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:14,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:14,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:14,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:14,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:15,555 INFO L124 PetriNetUnfolderBase]: 2205/4835 cut-off events. [2024-11-09 10:47:15,556 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-09 10:47:15,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7844 conditions, 4835 events. 2205/4835 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39072 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7809. Up to 2954 conditions per place. [2024-11-09 10:47:15,603 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 53 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2024-11-09 10:47:15,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 346 flow [2024-11-09 10:47:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:47:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:47:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2024-11-09 10:47:15,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-09 10:47:15,606 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 232 flow. Second operand 3 states and 252 transitions. [2024-11-09 10:47:15,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 346 flow [2024-11-09 10:47:15,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:15,613 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 242 flow [2024-11-09 10:47:15,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2024-11-09 10:47:15,614 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -8 predicate places. [2024-11-09 10:47:15,615 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 242 flow [2024-11-09 10:47:15,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:15,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:15,615 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:47:15,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:47:15,616 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:15,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:15,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1273224688, now seen corresponding path program 1 times [2024-11-09 10:47:15,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:15,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264813049] [2024-11-09 10:47:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:15,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:47:15,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264813049] [2024-11-09 10:47:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264813049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:15,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265606555] [2024-11-09 10:47:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:15,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:15,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:15,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:47:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:16,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:47:16,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:16,102 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 [2024-11-09 10:47:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:47:16,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:47:16,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265606555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:16,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:16,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:47:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520841672] [2024-11-09 10:47:16,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:16,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:47:16,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:16,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:47:16,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:47:17,134 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:17,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 242 flow. Second operand has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:17,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:17,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:17,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:17,801 INFO L124 PetriNetUnfolderBase]: 2205/4834 cut-off events. [2024-11-09 10:47:17,801 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-09 10:47:17,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7846 conditions, 4834 events. 2205/4834 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39080 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7833. Up to 2950 conditions per place. [2024-11-09 10:47:17,846 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 49 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2024-11-09 10:47:17,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 348 flow [2024-11-09 10:47:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:47:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:47:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 380 transitions. [2024-11-09 10:47:17,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-09 10:47:17,854 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 242 flow. Second operand 5 states and 380 transitions. [2024-11-09 10:47:17,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 348 flow [2024-11-09 10:47:17,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 112 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:47:17,858 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 254 flow [2024-11-09 10:47:17,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-11-09 10:47:17,860 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -5 predicate places. [2024-11-09 10:47:17,860 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 254 flow [2024-11-09 10:47:17,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:17,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:17,861 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:47:17,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 10:47:18,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:18,063 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:18,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash 815261611, now seen corresponding path program 1 times [2024-11-09 10:47:18,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:18,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083513431] [2024-11-09 10:47:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:18,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:47:18,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:18,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083513431] [2024-11-09 10:47:18,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083513431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:18,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:18,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:18,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867263115] [2024-11-09 10:47:18,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:18,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:47:18,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:18,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:47:18,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:47:18,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:18,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:18,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:18,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:18,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:18,915 INFO L124 PetriNetUnfolderBase]: 2206/4837 cut-off events. [2024-11-09 10:47:18,915 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-09 10:47:18,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4837 events. 2206/4837 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39112 event pairs, 1390 based on Foata normal form. 0/3722 useless extension candidates. Maximal degree in co-relation 7831. Up to 2953 conditions per place. [2024-11-09 10:47:18,953 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 52 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-11-09 10:47:18,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 374 flow [2024-11-09 10:47:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2024-11-09 10:47:18,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-09 10:47:18,956 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 254 flow. Second operand 4 states and 318 transitions. [2024-11-09 10:47:18,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 374 flow [2024-11-09 10:47:18,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 115 transitions, 364 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-09 10:47:18,959 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 269 flow [2024-11-09 10:47:18,960 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-11-09 10:47:18,961 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -4 predicate places. [2024-11-09 10:47:18,961 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 269 flow [2024-11-09 10:47:18,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:18,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:18,962 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:18,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:47:18,962 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:18,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash -496692954, now seen corresponding path program 1 times [2024-11-09 10:47:18,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:18,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800434663] [2024-11-09 10:47:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:18,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:47:19,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800434663] [2024-11-09 10:47:19,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800434663] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:19,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:19,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:19,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422708473] [2024-11-09 10:47:19,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:19,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:19,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:19,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:47:19,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:19,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:19,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:19,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:19,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:19,605 INFO L124 PetriNetUnfolderBase]: 2205/4836 cut-off events. [2024-11-09 10:47:19,606 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-09 10:47:19,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4836 events. 2205/4836 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39097 event pairs, 1390 based on Foata normal form. 1/3726 useless extension candidates. Maximal degree in co-relation 7832. Up to 2950 conditions per place. [2024-11-09 10:47:19,654 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 50 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2024-11-09 10:47:19,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 114 transitions, 374 flow [2024-11-09 10:47:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2024-11-09 10:47:19,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-11-09 10:47:19,657 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 269 flow. Second operand 4 states and 327 transitions. [2024-11-09 10:47:19,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 114 transitions, 374 flow [2024-11-09 10:47:19,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:19,663 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 268 flow [2024-11-09 10:47:19,664 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2024-11-09 10:47:19,664 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2024-11-09 10:47:19,666 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 268 flow [2024-11-09 10:47:19,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:19,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:19,667 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:19,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:47:19,667 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:19,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:19,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1782402732, now seen corresponding path program 1 times [2024-11-09 10:47:19,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:19,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706960601] [2024-11-09 10:47:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:19,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:47:19,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:19,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706960601] [2024-11-09 10:47:19,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706960601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:19,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570347471] [2024-11-09 10:47:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:19,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:19,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:19,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:19,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:47:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:20,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:47:20,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:20,080 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 [2024-11-09 10:47:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:47:20,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:47:20,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570347471] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:20,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:20,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:47:20,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721583665] [2024-11-09 10:47:20,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:20,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:47:20,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:20,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:47:20,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:47:21,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:21,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 268 flow. Second operand has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:21,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:21,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:21,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:22,024 INFO L124 PetriNetUnfolderBase]: 2207/4841 cut-off events. [2024-11-09 10:47:22,024 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-09 10:47:22,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7881 conditions, 4841 events. 2207/4841 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39141 event pairs, 1390 based on Foata normal form. 0/3729 useless extension candidates. Maximal degree in co-relation 7839. Up to 2946 conditions per place. [2024-11-09 10:47:22,066 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 45 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-11-09 10:47:22,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 416 flow [2024-11-09 10:47:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:47:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:47:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 648 transitions. [2024-11-09 10:47:22,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-09 10:47:22,069 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 268 flow. Second operand 9 states and 648 transitions. [2024-11-09 10:47:22,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 416 flow [2024-11-09 10:47:22,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 119 transitions, 406 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:47:22,073 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 316 flow [2024-11-09 10:47:22,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=115, PETRI_TRANSITIONS=119} [2024-11-09 10:47:22,074 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-11-09 10:47:22,074 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 316 flow [2024-11-09 10:47:22,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:22,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:22,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:22,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:47:22,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 10:47:22,280 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:22,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash -580089275, now seen corresponding path program 1 times [2024-11-09 10:47:22,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:22,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610059201] [2024-11-09 10:47:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:22,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610059201] [2024-11-09 10:47:22,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610059201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:22,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:22,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068339768] [2024-11-09 10:47:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:22,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:47:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:22,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:47:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:47:22,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:22,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 119 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:22,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:22,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:22,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:23,163 INFO L124 PetriNetUnfolderBase]: 2207/4843 cut-off events. [2024-11-09 10:47:23,163 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-09 10:47:23,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7896 conditions, 4843 events. 2207/4843 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39096 event pairs, 1390 based on Foata normal form. 0/3731 useless extension candidates. Maximal degree in co-relation 7850. Up to 2958 conditions per place. [2024-11-09 10:47:23,200 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 58 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2024-11-09 10:47:23,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 121 transitions, 446 flow [2024-11-09 10:47:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-09 10:47:23,202 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-09 10:47:23,202 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 316 flow. Second operand 4 states and 317 transitions. [2024-11-09 10:47:23,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 121 transitions, 446 flow [2024-11-09 10:47:23,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 121 transitions, 427 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-09 10:47:23,206 INFO L231 Difference]: Finished difference. Result has 116 places, 120 transitions, 320 flow [2024-11-09 10:47:23,207 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=116, PETRI_TRANSITIONS=120} [2024-11-09 10:47:23,207 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 2 predicate places. [2024-11-09 10:47:23,208 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 120 transitions, 320 flow [2024-11-09 10:47:23,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:23,208 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:23,208 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:23,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:47:23,209 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:23,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:23,213 INFO L85 PathProgramCache]: Analyzing trace with hash 879998184, now seen corresponding path program 1 times [2024-11-09 10:47:23,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:23,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132805774] [2024-11-09 10:47:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:23,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:23,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:23,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132805774] [2024-11-09 10:47:23,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132805774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:23,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597080880] [2024-11-09 10:47:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:23,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:23,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:23,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:23,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:47:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:23,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:47:23,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:23,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:47:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:23,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:23,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597080880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:23,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:23,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:47:23,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534467191] [2024-11-09 10:47:23,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:23,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:47:23,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:23,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:47:23,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:47:24,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:24,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 120 transitions, 320 flow. Second operand has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:24,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:24,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:24,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:25,367 INFO L124 PetriNetUnfolderBase]: 2207/4842 cut-off events. [2024-11-09 10:47:25,367 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-09 10:47:25,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7894 conditions, 4842 events. 2207/4842 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39100 event pairs, 1390 based on Foata normal form. 0/3730 useless extension candidates. Maximal degree in co-relation 7849. Up to 2949 conditions per place. [2024-11-09 10:47:25,397 INFO L140 encePairwiseOnDemand]: 111/120 looper letters, 47 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2024-11-09 10:47:25,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 120 transitions, 442 flow [2024-11-09 10:47:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:47:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:47:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 510 transitions. [2024-11-09 10:47:25,400 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-09 10:47:25,400 INFO L175 Difference]: Start difference. First operand has 116 places, 120 transitions, 320 flow. Second operand 7 states and 510 transitions. [2024-11-09 10:47:25,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 120 transitions, 442 flow [2024-11-09 10:47:25,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 120 transitions, 437 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:25,402 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 343 flow [2024-11-09 10:47:25,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=343, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2024-11-09 10:47:25,405 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 5 predicate places. [2024-11-09 10:47:25,405 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 343 flow [2024-11-09 10:47:25,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:25,406 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:25,406 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:25,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:47:25,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:25,607 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:25,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143368, now seen corresponding path program 1 times [2024-11-09 10:47:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:25,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097515087] [2024-11-09 10:47:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:25,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097515087] [2024-11-09 10:47:25,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097515087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063412112] [2024-11-09 10:47:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:25,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:25,857 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:25,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:47:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:25,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:47:25,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:26,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:47:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:26,048 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:47:26,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063412112] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:26,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:47:26,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 10:47:26,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225302457] [2024-11-09 10:47:26,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:26,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:26,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:26,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:47:26,114 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:26,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:26,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:26,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:26,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:26,533 INFO L124 PetriNetUnfolderBase]: 2208/4846 cut-off events. [2024-11-09 10:47:26,533 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-09 10:47:26,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7917 conditions, 4846 events. 2208/4846 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39145 event pairs, 1390 based on Foata normal form. 0/3733 useless extension candidates. Maximal degree in co-relation 7865. Up to 2966 conditions per place. [2024-11-09 10:47:26,566 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 64 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2024-11-09 10:47:26,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 123 transitions, 485 flow [2024-11-09 10:47:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-09 10:47:26,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-09 10:47:26,568 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 343 flow. Second operand 4 states and 317 transitions. [2024-11-09 10:47:26,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 123 transitions, 485 flow [2024-11-09 10:47:26,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 123 transitions, 465 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-09 10:47:26,571 INFO L231 Difference]: Finished difference. Result has 119 places, 122 transitions, 344 flow [2024-11-09 10:47:26,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=119, PETRI_TRANSITIONS=122} [2024-11-09 10:47:26,572 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 5 predicate places. [2024-11-09 10:47:26,573 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 122 transitions, 344 flow [2024-11-09 10:47:26,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:26,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:26,573 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:26,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:47:26,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:26,778 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:26,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:26,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143367, now seen corresponding path program 1 times [2024-11-09 10:47:26,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:26,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305877139] [2024-11-09 10:47:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:26,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:26,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:26,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305877139] [2024-11-09 10:47:26,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305877139] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:26,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:26,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:47:26,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746182868] [2024-11-09 10:47:26,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:26,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:47:26,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:26,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:47:26,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:47:26,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:26,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 122 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:26,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:26,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:26,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:27,294 INFO L124 PetriNetUnfolderBase]: 2208/4842 cut-off events. [2024-11-09 10:47:27,294 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-09 10:47:27,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7909 conditions, 4842 events. 2208/4842 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39120 event pairs, 1390 based on Foata normal form. 2/3734 useless extension candidates. Maximal degree in co-relation 7860. Up to 2954 conditions per place. [2024-11-09 10:47:27,327 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 62 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2024-11-09 10:47:27,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 466 flow [2024-11-09 10:47:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:47:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:47:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2024-11-09 10:47:27,329 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-11-09 10:47:27,329 INFO L175 Difference]: Start difference. First operand has 119 places, 122 transitions, 344 flow. Second operand 3 states and 248 transitions. [2024-11-09 10:47:27,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 466 flow [2024-11-09 10:47:27,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:27,332 INFO L231 Difference]: Finished difference. Result has 116 places, 119 transitions, 337 flow [2024-11-09 10:47:27,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=116, PETRI_TRANSITIONS=119} [2024-11-09 10:47:27,333 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 2 predicate places. [2024-11-09 10:47:27,333 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 119 transitions, 337 flow [2024-11-09 10:47:27,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:27,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:27,333 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:27,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:47:27,333 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:27,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash -430193655, now seen corresponding path program 1 times [2024-11-09 10:47:27,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:27,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971843655] [2024-11-09 10:47:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:27,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971843655] [2024-11-09 10:47:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971843655] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:27,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:27,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:27,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509572770] [2024-11-09 10:47:27,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:27,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:27,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:47:27,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:27,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 119 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 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) [2024-11-09 10:47:27,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:27,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:27,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:27,884 INFO L124 PetriNetUnfolderBase]: 2207/4841 cut-off events. [2024-11-09 10:47:27,884 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-09 10:47:27,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7905 conditions, 4841 events. 2207/4841 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39089 event pairs, 1390 based on Foata normal form. 1/3733 useless extension candidates. Maximal degree in co-relation 7857. Up to 2962 conditions per place. [2024-11-09 10:47:27,914 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 61 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-11-09 10:47:27,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 463 flow [2024-11-09 10:47:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-09 10:47:27,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-09 10:47:27,916 INFO L175 Difference]: Start difference. First operand has 116 places, 119 transitions, 337 flow. Second operand 4 states and 325 transitions. [2024-11-09 10:47:27,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 463 flow [2024-11-09 10:47:27,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 459 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:27,918 INFO L231 Difference]: Finished difference. Result has 117 places, 118 transitions, 335 flow [2024-11-09 10:47:27,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=335, PETRI_PLACES=117, PETRI_TRANSITIONS=118} [2024-11-09 10:47:27,919 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 3 predicate places. [2024-11-09 10:47:27,919 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 118 transitions, 335 flow [2024-11-09 10:47:27,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 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) [2024-11-09 10:47:27,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:27,920 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:27,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:47:27,920 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:27,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash -451124234, now seen corresponding path program 1 times [2024-11-09 10:47:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:27,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582703123] [2024-11-09 10:47:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:27,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:28,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:28,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582703123] [2024-11-09 10:47:28,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582703123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:28,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642152824] [2024-11-09 10:47:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:28,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:28,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:28,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:47:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:28,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:47:28,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:28,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:28,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642152824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:28,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:28,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 10:47:28,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35168222] [2024-11-09 10:47:28,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:28,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:47:28,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:47:28,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:47:28,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:28,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 118 transitions, 335 flow. Second operand has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:28,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:28,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:28,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:29,458 INFO L124 PetriNetUnfolderBase]: 4400/9622 cut-off events. [2024-11-09 10:47:29,459 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-09 10:47:29,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15695 conditions, 9622 events. 4400/9622 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 87426 event pairs, 2784 based on Foata normal form. 1/7501 useless extension candidates. Maximal degree in co-relation 7850. Up to 2943 conditions per place. [2024-11-09 10:47:29,514 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 87 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2024-11-09 10:47:29,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 171 transitions, 716 flow [2024-11-09 10:47:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:47:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:47:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2024-11-09 10:47:29,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-11-09 10:47:29,516 INFO L175 Difference]: Start difference. First operand has 117 places, 118 transitions, 335 flow. Second operand 9 states and 716 transitions. [2024-11-09 10:47:29,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 171 transitions, 716 flow [2024-11-09 10:47:29,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 706 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:47:29,520 INFO L231 Difference]: Finished difference. Result has 126 places, 133 transitions, 496 flow [2024-11-09 10:47:29,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=496, PETRI_PLACES=126, PETRI_TRANSITIONS=133} [2024-11-09 10:47:29,521 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 12 predicate places. [2024-11-09 10:47:29,521 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 133 transitions, 496 flow [2024-11-09 10:47:29,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:29,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:29,522 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:29,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:47:29,723 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,SelfDestructingSolverStorable11 [2024-11-09 10:47:29,723 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:29,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:29,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1099947173, now seen corresponding path program 1 times [2024-11-09 10:47:29,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:29,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024887998] [2024-11-09 10:47:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:29,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:29,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:29,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024887998] [2024-11-09 10:47:29,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024887998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:29,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134402549] [2024-11-09 10:47:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:29,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:29,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:29,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:29,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:47:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:30,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:47:30,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:30,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:47:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:47:30,138 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:47:30,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134402549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:30,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:47:30,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-09 10:47:30,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476897607] [2024-11-09 10:47:30,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:30,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:30,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:30,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:30,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:47:30,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:30,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 133 transitions, 496 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:30,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:30,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:30,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:30,926 INFO L124 PetriNetUnfolderBase]: 4412/9676 cut-off events. [2024-11-09 10:47:30,926 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-09 10:47:30,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15825 conditions, 9676 events. 4412/9676 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 88219 event pairs, 2780 based on Foata normal form. 0/7455 useless extension candidates. Maximal degree in co-relation 7886. Up to 5924 conditions per place. [2024-11-09 10:47:30,973 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 79 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-11-09 10:47:30,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 136 transitions, 670 flow [2024-11-09 10:47:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-09 10:47:30,975 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-09 10:47:30,975 INFO L175 Difference]: Start difference. First operand has 126 places, 133 transitions, 496 flow. Second operand 4 states and 317 transitions. [2024-11-09 10:47:30,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 136 transitions, 670 flow [2024-11-09 10:47:30,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 136 transitions, 666 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 10:47:30,978 INFO L231 Difference]: Finished difference. Result has 129 places, 135 transitions, 516 flow [2024-11-09 10:47:30,978 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=516, PETRI_PLACES=129, PETRI_TRANSITIONS=135} [2024-11-09 10:47:30,979 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 15 predicate places. [2024-11-09 10:47:30,979 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 135 transitions, 516 flow [2024-11-09 10:47:30,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:30,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:30,980 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:30,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:47:31,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:31,184 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:31,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:31,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1364202777, now seen corresponding path program 2 times [2024-11-09 10:47:31,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:31,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632839166] [2024-11-09 10:47:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:31,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:31,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632839166] [2024-11-09 10:47:31,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632839166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:31,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642450651] [2024-11-09 10:47:31,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:47:31,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:31,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:31,602 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:31,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:47:31,701 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:47:31,701 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:47:31,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:47:31,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:31,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-09 10:47:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:47:31,844 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:47:31,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642450651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:31,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:31,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2024-11-09 10:47:31,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759288085] [2024-11-09 10:47:31,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:31,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:47:31,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:47:31,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:47:32,966 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:32,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 135 transitions, 516 flow. Second operand has 18 states, 18 states have (on average 67.44444444444444) internal successors, (1214), 18 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:32,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:32,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:32,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:34,519 INFO L124 PetriNetUnfolderBase]: 6608/14465 cut-off events. [2024-11-09 10:47:34,519 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-09 10:47:34,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23690 conditions, 14465 events. 6608/14465 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 140043 event pairs, 4174 based on Foata normal form. 1/11239 useless extension candidates. Maximal degree in co-relation 7891. Up to 5915 conditions per place. [2024-11-09 10:47:34,598 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 115 selfloop transitions, 31 changer transitions 0/198 dead transitions. [2024-11-09 10:47:34,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 1061 flow [2024-11-09 10:47:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 10:47:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-09 10:47:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1221 transitions. [2024-11-09 10:47:34,601 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5985294117647059 [2024-11-09 10:47:34,601 INFO L175 Difference]: Start difference. First operand has 129 places, 135 transitions, 516 flow. Second operand 17 states and 1221 transitions. [2024-11-09 10:47:34,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 1061 flow [2024-11-09 10:47:34,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 198 transitions, 1052 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:34,606 INFO L231 Difference]: Finished difference. Result has 145 places, 154 transitions, 751 flow [2024-11-09 10:47:34,606 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=751, PETRI_PLACES=145, PETRI_TRANSITIONS=154} [2024-11-09 10:47:34,607 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 31 predicate places. [2024-11-09 10:47:34,607 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 154 transitions, 751 flow [2024-11-09 10:47:34,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.44444444444444) internal successors, (1214), 18 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:34,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:34,608 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:34,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:47:34,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:34,809 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:34,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:34,809 INFO L85 PathProgramCache]: Analyzing trace with hash 261377450, now seen corresponding path program 1 times [2024-11-09 10:47:34,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:34,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215649716] [2024-11-09 10:47:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:34,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:47:34,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:34,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215649716] [2024-11-09 10:47:34,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215649716] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:34,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:34,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:34,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880499162] [2024-11-09 10:47:34,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:34,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:34,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:47:34,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:34,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 154 transitions, 751 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:34,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:34,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:36,085 INFO L124 PetriNetUnfolderBase]: 6615/14510 cut-off events. [2024-11-09 10:47:36,085 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-09 10:47:36,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23791 conditions, 14510 events. 6615/14510 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 139988 event pairs, 4170 based on Foata normal form. 3/11196 useless extension candidates. Maximal degree in co-relation 7969. Up to 8876 conditions per place. [2024-11-09 10:47:36,165 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 95 selfloop transitions, 5 changer transitions 0/154 dead transitions. [2024-11-09 10:47:36,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 154 transitions, 949 flow [2024-11-09 10:47:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:36,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-09 10:47:36,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-09 10:47:36,167 INFO L175 Difference]: Start difference. First operand has 145 places, 154 transitions, 751 flow. Second operand 4 states and 325 transitions. [2024-11-09 10:47:36,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 154 transitions, 949 flow [2024-11-09 10:47:36,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 154 transitions, 911 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-11-09 10:47:36,172 INFO L231 Difference]: Finished difference. Result has 143 places, 153 transitions, 719 flow [2024-11-09 10:47:36,172 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=719, PETRI_PLACES=143, PETRI_TRANSITIONS=153} [2024-11-09 10:47:36,172 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 29 predicate places. [2024-11-09 10:47:36,172 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 153 transitions, 719 flow [2024-11-09 10:47:36,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:36,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:36,173 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:36,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:47:36,173 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:36,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:36,174 INFO L85 PathProgramCache]: Analyzing trace with hash -487233991, now seen corresponding path program 1 times [2024-11-09 10:47:36,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:36,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38193316] [2024-11-09 10:47:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:36,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:36,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38193316] [2024-11-09 10:47:36,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38193316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260164660] [2024-11-09 10:47:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:36,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:36,322 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:36,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:47:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:36,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:47:36,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:36,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:36,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260164660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:36,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:36,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 10:47:36,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352763634] [2024-11-09 10:47:36,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:36,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:47:36,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:36,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:47:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:47:36,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:36,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 153 transitions, 719 flow. Second operand has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:36,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:36,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:36,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:39,489 INFO L124 PetriNetUnfolderBase]: 13187/28831 cut-off events. [2024-11-09 10:47:39,490 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2024-11-09 10:47:39,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47132 conditions, 28831 events. 13187/28831 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 307377 event pairs, 8352 based on Foata normal form. 3/22489 useless extension candidates. Maximal degree in co-relation 15974. Up to 8825 conditions per place. [2024-11-09 10:47:39,711 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 114 selfloop transitions, 50 changer transitions 0/218 dead transitions. [2024-11-09 10:47:39,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 218 transitions, 1342 flow [2024-11-09 10:47:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:47:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:47:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2024-11-09 10:47:39,713 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6601851851851852 [2024-11-09 10:47:39,714 INFO L175 Difference]: Start difference. First operand has 143 places, 153 transitions, 719 flow. Second operand 9 states and 713 transitions. [2024-11-09 10:47:39,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 218 transitions, 1342 flow [2024-11-09 10:47:39,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 218 transitions, 1324 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:47:39,719 INFO L231 Difference]: Finished difference. Result has 152 places, 170 transitions, 1016 flow [2024-11-09 10:47:39,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=152, PETRI_TRANSITIONS=170} [2024-11-09 10:47:39,720 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 38 predicate places. [2024-11-09 10:47:39,720 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 170 transitions, 1016 flow [2024-11-09 10:47:39,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:39,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:39,721 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:39,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:47:39,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:47:39,922 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:39,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:39,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2075616908, now seen corresponding path program 1 times [2024-11-09 10:47:39,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:39,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091637350] [2024-11-09 10:47:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:39,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:47:40,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:40,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091637350] [2024-11-09 10:47:40,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091637350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:40,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:40,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:40,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844552890] [2024-11-09 10:47:40,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:40,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:47:40,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:40,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:47:40,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:47:40,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:40,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 170 transitions, 1016 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:40,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:40,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:40,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:42,853 INFO L124 PetriNetUnfolderBase]: 13217/28987 cut-off events. [2024-11-09 10:47:42,853 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-11-09 10:47:42,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47443 conditions, 28987 events. 13217/28987 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 1443. Compared 310020 event pairs, 8340 based on Foata normal form. 0/22347 useless extension candidates. Maximal degree in co-relation 16122. Up to 17731 conditions per place. [2024-11-09 10:47:42,999 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 116 selfloop transitions, 4 changer transitions 0/172 dead transitions. [2024-11-09 10:47:43,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 172 transitions, 1260 flow [2024-11-09 10:47:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2024-11-09 10:47:43,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-11-09 10:47:43,001 INFO L175 Difference]: Start difference. First operand has 152 places, 170 transitions, 1016 flow. Second operand 4 states and 316 transitions. [2024-11-09 10:47:43,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 172 transitions, 1260 flow [2024-11-09 10:47:43,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 172 transitions, 1258 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-09 10:47:43,006 INFO L231 Difference]: Finished difference. Result has 156 places, 171 transitions, 1033 flow [2024-11-09 10:47:43,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1033, PETRI_PLACES=156, PETRI_TRANSITIONS=171} [2024-11-09 10:47:43,007 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 42 predicate places. [2024-11-09 10:47:43,007 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 171 transitions, 1033 flow [2024-11-09 10:47:43,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:43,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:43,008 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:43,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 10:47:43,008 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:43,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash 560678040, now seen corresponding path program 2 times [2024-11-09 10:47:43,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:43,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585797347] [2024-11-09 10:47:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:43,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:43,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585797347] [2024-11-09 10:47:43,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585797347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988916467] [2024-11-09 10:47:43,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:47:43,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:43,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:43,298 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:43,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:47:43,419 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:47:43,419 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:47:43,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:47:43,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:43,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-09 10:47:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 10:47:43,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 10:47:43,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988916467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:43,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:43,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2024-11-09 10:47:43,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447498140] [2024-11-09 10:47:43,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:43,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:47:43,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:47:43,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:47:44,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:44,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 171 transitions, 1033 flow. Second operand has 18 states, 18 states have (on average 67.94444444444444) internal successors, (1223), 18 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:44,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:44,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:44,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:49,017 INFO L124 PetriNetUnfolderBase]: 19795/43329 cut-off events. [2024-11-09 10:47:49,017 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2024-11-09 10:47:49,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70966 conditions, 43329 events. 19795/43329 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 2041. Compared 486477 event pairs, 12522 based on Foata normal form. 3/33674 useless extension candidates. Maximal degree in co-relation 24078. Up to 17704 conditions per place. [2024-11-09 10:47:49,349 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 142 selfloop transitions, 55 changer transitions 0/249 dead transitions. [2024-11-09 10:47:49,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 249 transitions, 1877 flow [2024-11-09 10:47:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 10:47:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-09 10:47:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1216 transitions. [2024-11-09 10:47:49,353 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.596078431372549 [2024-11-09 10:47:49,353 INFO L175 Difference]: Start difference. First operand has 156 places, 171 transitions, 1033 flow. Second operand 17 states and 1216 transitions. [2024-11-09 10:47:49,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 249 transitions, 1877 flow [2024-11-09 10:47:49,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 249 transitions, 1870 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:49,362 INFO L231 Difference]: Finished difference. Result has 172 places, 200 transitions, 1497 flow [2024-11-09 10:47:49,362 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1497, PETRI_PLACES=172, PETRI_TRANSITIONS=200} [2024-11-09 10:47:49,362 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 58 predicate places. [2024-11-09 10:47:49,363 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 200 transitions, 1497 flow [2024-11-09 10:47:49,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.94444444444444) internal successors, (1223), 18 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:49,363 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:49,364 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:49,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:47:49,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:47:49,564 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:49,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1803065764, now seen corresponding path program 1 times [2024-11-09 10:47:49,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:49,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725067726] [2024-11-09 10:47:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:49,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:47:49,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:49,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725067726] [2024-11-09 10:47:49,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725067726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:49,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959659042] [2024-11-09 10:47:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:49,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:49,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:49,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:49,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:47:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:49,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:47:49,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:47:49,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:47:49,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959659042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:49,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:49,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 10:47:49,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186468966] [2024-11-09 10:47:49,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:49,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:47:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:49,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:47:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:47:50,187 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:50,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 200 transitions, 1497 flow. Second operand has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:50,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:50,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:50,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:58,932 INFO L124 PetriNetUnfolderBase]: 39538/86424 cut-off events. [2024-11-09 10:47:58,932 INFO L125 PetriNetUnfolderBase]: For 842/842 co-relation queries the response was YES. [2024-11-09 10:47:59,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141427 conditions, 86424 events. 39538/86424 cut-off events. For 842/842 co-relation queries the response was YES. Maximal size of possible extension queue 3962. Compared 1060647 event pairs, 25056 based on Foata normal form. 9/67425 useless extension candidates. Maximal degree in co-relation 47785. Up to 26472 conditions per place. [2024-11-09 10:47:59,765 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 156 selfloop transitions, 81 changer transitions 0/290 dead transitions. [2024-11-09 10:47:59,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 290 transitions, 2624 flow [2024-11-09 10:47:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:47:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:47:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 641 transitions. [2024-11-09 10:47:59,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6677083333333333 [2024-11-09 10:47:59,767 INFO L175 Difference]: Start difference. First operand has 172 places, 200 transitions, 1497 flow. Second operand 8 states and 641 transitions. [2024-11-09 10:47:59,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 290 transitions, 2624 flow [2024-11-09 10:47:59,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 290 transitions, 2490 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-11-09 10:47:59,780 INFO L231 Difference]: Finished difference. Result has 177 places, 229 transitions, 2065 flow [2024-11-09 10:47:59,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2065, PETRI_PLACES=177, PETRI_TRANSITIONS=229} [2024-11-09 10:47:59,781 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 63 predicate places. [2024-11-09 10:47:59,781 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 229 transitions, 2065 flow [2024-11-09 10:47:59,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:59,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:59,782 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:59,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 10:47:59,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:59,983 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:59,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:59,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1162836769, now seen corresponding path program 2 times [2024-11-09 10:47:59,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:59,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229783363] [2024-11-09 10:47:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:59,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:48:00,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:00,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229783363] [2024-11-09 10:48:00,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229783363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:00,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8743907] [2024-11-09 10:48:00,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:48:00,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:00,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:00,291 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:48:00,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:48:00,412 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:48:00,412 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:48:00,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 10:48:00,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:00,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-09 10:48:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:48:00,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:48:00,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8743907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:00,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:00,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2024-11-09 10:48:00,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166079500] [2024-11-09 10:48:00,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:00,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:48:00,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:00,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:48:00,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:48:01,623 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:48:01,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 229 transitions, 2065 flow. Second operand has 18 states, 18 states have (on average 68.44444444444444) internal successors, (1232), 18 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:01,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:01,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:48:01,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand