./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:13:52,510 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:13:52,569 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:13:52,575 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:13:52,576 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:13:52,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:13:52,614 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:13:52,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:13:52,615 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:13:52,616 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:13:52,616 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:13:52,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:13:52,617 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:13:52,617 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:13:52,619 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:13:52,619 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:13:52,619 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:13:52,619 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:13:52,620 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:13:52,620 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:13:52,620 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:13:52,624 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:13:52,624 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:13:52,624 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:13:52,624 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:13:52,624 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:13:52,624 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:13:52,624 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:13:52,625 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:13:52,625 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:13:52,625 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:13:52,625 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:13:52,625 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:13:52,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:13:52,625 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:13:52,626 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:13:52,626 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:13:52,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:13:52,626 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:13:52,626 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:13:52,626 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:13:52,627 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:13:52,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf [2024-11-10 18:13:52,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:13:52,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:13:52,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:13:52,976 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:13:52,977 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:13:52,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-11-10 18:13:54,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:13:54,531 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:13:54,531 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-11-10 18:13:54,537 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b4e37701/38361e60fe6549b2a20dddabe28ed94a/FLAG4b614c9c1 [2024-11-10 18:13:54,947 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b4e37701/38361e60fe6549b2a20dddabe28ed94a [2024-11-10 18:13:54,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:13:54,952 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:13:54,953 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:13:54,953 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:13:54,957 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:13:54,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:13:54" (1/1) ... [2024-11-10 18:13:54,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5022ead4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:54, skipping insertion in model container [2024-11-10 18:13:54,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:13:54" (1/1) ... [2024-11-10 18:13:54,979 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:13:55,170 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:13:55,177 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:13:55,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:13:55,195 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:13:55,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:13:55,274 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:13:55,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55 WrapperNode [2024-11-10 18:13:55,278 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:13:55,279 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:13:55,279 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:13:55,279 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:13:55,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,302 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,356 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 420 [2024-11-10 18:13:55,360 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:13:55,361 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:13:55,361 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:13:55,361 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:13:55,381 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,390 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,412 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 9, 15]. 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]. [2024-11-10 18:13:55,412 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,413 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,421 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,431 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:13:55,432 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:13:55,432 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:13:55,432 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:13:55,433 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (1/1) ... [2024-11-10 18:13:55,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:13:55,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:13:55,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:13:55,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:13:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:13:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:13:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:13:55,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 18:13:55,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:13:55,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:13:55,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 18:13:55,510 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:13:55,510 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:13:55,510 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:13:55,510 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:13:55,510 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:13:55,510 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:13:55,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:13:55,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:13:55,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 18:13:55,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:13:55,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:13:55,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:13:55,512 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:13:55,645 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:13:55,647 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:13:56,129 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:13:56,129 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:13:56,583 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:13:56,583 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:13:56,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:13:56 BoogieIcfgContainer [2024-11-10 18:13:56,583 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:13:56,585 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:13:56,585 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:13:56,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:13:56,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:13:54" (1/3) ... [2024-11-10 18:13:56,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5c5484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:13:56, skipping insertion in model container [2024-11-10 18:13:56,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:13:55" (2/3) ... [2024-11-10 18:13:56,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5c5484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:13:56, skipping insertion in model container [2024-11-10 18:13:56,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:13:56" (3/3) ... [2024-11-10 18:13:56,599 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2024-11-10 18:13:56,620 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:13:56,620 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-11-10 18:13:56,620 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:13:56,698 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:13:56,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 138 transitions, 297 flow [2024-11-10 18:13:56,782 INFO L124 PetriNetUnfolderBase]: 18/135 cut-off events. [2024-11-10 18:13:56,782 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:13:56,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 18/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 410 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2024-11-10 18:13:56,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 138 transitions, 297 flow [2024-11-10 18:13:56,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 134 transitions, 286 flow [2024-11-10 18:13:56,801 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:13:56,808 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;@3a3713d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:13:56,808 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2024-11-10 18:13:56,812 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:13:56,812 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:13:56,812 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:13:56,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:13:56,813 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:13:56,813 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:13:56,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:13:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash 38489048, now seen corresponding path program 1 times [2024-11-10 18:13:56,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:13:56,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174058782] [2024-11-10 18:13:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:56,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:13:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:13:57,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:13:57,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174058782] [2024-11-10 18:13:57,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174058782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:13:57,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:13:57,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:13:57,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255308239] [2024-11-10 18:13:57,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:13:57,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:13:57,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:13:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:13:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:13:57,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-10 18:13:57,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 134 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:57,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:13:57,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-10 18:13:57,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:13:57,706 INFO L124 PetriNetUnfolderBase]: 2263/5005 cut-off events. [2024-11-10 18:13:57,707 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-11-10 18:13:57,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8178 conditions, 5005 events. 2263/5005 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40697 event pairs, 1414 based on Foata normal form. 7/3863 useless extension candidates. Maximal degree in co-relation 7651. Up to 3012 conditions per place. [2024-11-10 18:13:57,747 INFO L140 encePairwiseOnDemand]: 126/138 looper letters, 48 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2024-11-10 18:13:57,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 364 flow [2024-11-10 18:13:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:13:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:13:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2024-11-10 18:13:57,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7028985507246377 [2024-11-10 18:13:57,760 INFO L175 Difference]: Start difference. First operand has 126 places, 134 transitions, 286 flow. Second operand 3 states and 291 transitions. [2024-11-10 18:13:57,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 364 flow [2024-11-10 18:13:57,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 123 transitions, 352 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:13:57,770 INFO L231 Difference]: Finished difference. Result has 117 places, 123 transitions, 256 flow [2024-11-10 18:13:57,772 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=117, PETRI_TRANSITIONS=123} [2024-11-10 18:13:57,774 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -9 predicate places. [2024-11-10 18:13:57,776 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 123 transitions, 256 flow [2024-11-10 18:13:57,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:57,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:13:57,776 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:13:57,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:13:57,777 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:13:57,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:13:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash 38489049, now seen corresponding path program 1 times [2024-11-10 18:13:57,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:13:57,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768139452] [2024-11-10 18:13:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:57,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:13:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:13:58,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:13:58,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768139452] [2024-11-10 18:13:58,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768139452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:13:58,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:13:58,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:13:58,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374548883] [2024-11-10 18:13:58,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:13:58,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:13:58,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:13:58,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:13:58,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:13:58,108 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-10 18:13:58,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 123 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:58,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:13:58,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-10 18:13:58,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:13:58,582 INFO L124 PetriNetUnfolderBase]: 2263/5008 cut-off events. [2024-11-10 18:13:58,582 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-10 18:13:58,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8089 conditions, 5008 events. 2263/5008 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40712 event pairs, 1414 based on Foata normal form. 0/3853 useless extension candidates. Maximal degree in co-relation 8044. Up to 3027 conditions per place. [2024-11-10 18:13:58,613 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 56 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2024-11-10 18:13:58,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 125 transitions, 376 flow [2024-11-10 18:13:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:13:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:13:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-11-10 18:13:58,616 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-11-10 18:13:58,616 INFO L175 Difference]: Start difference. First operand has 117 places, 123 transitions, 256 flow. Second operand 3 states and 282 transitions. [2024-11-10 18:13:58,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 125 transitions, 376 flow [2024-11-10 18:13:58,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 125 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:13:58,619 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 266 flow [2024-11-10 18:13:58,619 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2024-11-10 18:13:58,620 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -8 predicate places. [2024-11-10 18:13:58,620 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 266 flow [2024-11-10 18:13:58,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:58,621 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:13:58,621 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:13:58,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:13:58,621 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:13:58,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:13:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash -127788765, now seen corresponding path program 1 times [2024-11-10 18:13:58,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:13:58,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726257279] [2024-11-10 18:13:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:13:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:13:58,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:13:58,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726257279] [2024-11-10 18:13:58,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726257279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:13:58,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433246550] [2024-11-10 18:13:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:13:58,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:13:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:13:58,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:13:58,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:13:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:13:58,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:13:58,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:13:58,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:13:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:13:59,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:13:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:13:59,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433246550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:13:59,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:13:59,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:13:59,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492671602] [2024-11-10 18:13:59,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:13:59,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:13:59,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:13:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:13:59,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:13:59,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-10 18:13:59,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 75.36363636363636) internal successors, (829), 11 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:13:59,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:13:59,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-10 18:13:59,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:00,228 INFO L124 PetriNetUnfolderBase]: 2264/5012 cut-off events. [2024-11-10 18:14:00,228 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-10 18:14:00,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8102 conditions, 5012 events. 2264/5012 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40708 event pairs, 1414 based on Foata normal form. 0/3859 useless extension candidates. Maximal degree in co-relation 8088. Up to 3021 conditions per place. [2024-11-10 18:14:00,260 INFO L140 encePairwiseOnDemand]: 129/138 looper letters, 49 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2024-11-10 18:14:00,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 128 transitions, 398 flow [2024-11-10 18:14:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:14:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:14:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 655 transitions. [2024-11-10 18:14:00,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5932971014492754 [2024-11-10 18:14:00,265 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 266 flow. Second operand 8 states and 655 transitions. [2024-11-10 18:14:00,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 128 transitions, 398 flow [2024-11-10 18:14:00,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 128 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:14:00,268 INFO L231 Difference]: Finished difference. Result has 123 places, 127 transitions, 296 flow [2024-11-10 18:14:00,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=123, PETRI_TRANSITIONS=127} [2024-11-10 18:14:00,269 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -3 predicate places. [2024-11-10 18:14:00,269 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 127 transitions, 296 flow [2024-11-10 18:14:00,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.36363636363636) internal successors, (829), 11 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:00,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:00,270 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:00,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:14:00,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:00,474 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:00,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1613563637, now seen corresponding path program 1 times [2024-11-10 18:14:00,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:00,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684739007] [2024-11-10 18:14:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:00,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:00,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:00,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684739007] [2024-11-10 18:14:00,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684739007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:00,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:00,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606126118] [2024-11-10 18:14:00,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:00,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:00,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:00,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-10 18:14:00,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 127 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:00,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:00,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-10 18:14:00,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:01,315 INFO L124 PetriNetUnfolderBase]: 2265/5017 cut-off events. [2024-11-10 18:14:01,315 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-10 18:14:01,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8120 conditions, 5017 events. 2265/5017 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40782 event pairs, 1414 based on Foata normal form. 0/3866 useless extension candidates. Maximal degree in co-relation 8081. Up to 3025 conditions per place. [2024-11-10 18:14:01,338 INFO L140 encePairwiseOnDemand]: 132/138 looper letters, 54 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2024-11-10 18:14:01,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 130 transitions, 424 flow [2024-11-10 18:14:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:14:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:14:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2024-11-10 18:14:01,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-11-10 18:14:01,339 INFO L175 Difference]: Start difference. First operand has 123 places, 127 transitions, 296 flow. Second operand 4 states and 366 transitions. [2024-11-10 18:14:01,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 130 transitions, 424 flow [2024-11-10 18:14:01,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 130 transitions, 405 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 18:14:01,342 INFO L231 Difference]: Finished difference. Result has 124 places, 129 transitions, 307 flow [2024-11-10 18:14:01,342 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=124, PETRI_TRANSITIONS=129} [2024-11-10 18:14:01,343 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -2 predicate places. [2024-11-10 18:14:01,343 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 129 transitions, 307 flow [2024-11-10 18:14:01,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:01,344 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:01,344 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:01,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:14:01,344 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:01,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash -399107829, now seen corresponding path program 1 times [2024-11-10 18:14:01,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:01,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125783538] [2024-11-10 18:14:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:01,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:01,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:01,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125783538] [2024-11-10 18:14:01,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125783538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:01,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109036737] [2024-11-10 18:14:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:01,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:01,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:01,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:14:01,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:14:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:01,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:14:01,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:01,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-10 18:14:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:01,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:01,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109036737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:01,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:01,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:14:01,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056408515] [2024-11-10 18:14:01,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:01,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:14:01,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:01,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:14:01,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:14:02,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-10 18:14:02,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 129 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 75.76923076923077) internal successors, (985), 13 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:02,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:02,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-10 18:14:02,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:03,704 INFO L124 PetriNetUnfolderBase]: 2266/5021 cut-off events. [2024-11-10 18:14:03,704 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-10 18:14:03,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8135 conditions, 5021 events. 2266/5021 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40791 event pairs, 1414 based on Foata normal form. 0/3867 useless extension candidates. Maximal degree in co-relation 8093. Up to 3017 conditions per place. [2024-11-10 18:14:03,741 INFO L140 encePairwiseOnDemand]: 128/138 looper letters, 49 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2024-11-10 18:14:03,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 135 transitions, 459 flow [2024-11-10 18:14:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:14:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:14:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 810 transitions. [2024-11-10 18:14:03,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-11-10 18:14:03,743 INFO L175 Difference]: Start difference. First operand has 124 places, 129 transitions, 307 flow. Second operand 10 states and 810 transitions. [2024-11-10 18:14:03,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 135 transitions, 459 flow [2024-11-10 18:14:03,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 135 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:03,748 INFO L231 Difference]: Finished difference. Result has 130 places, 132 transitions, 347 flow [2024-11-10 18:14:03,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=347, PETRI_PLACES=130, PETRI_TRANSITIONS=132} [2024-11-10 18:14:03,750 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 4 predicate places. [2024-11-10 18:14:03,750 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 132 transitions, 347 flow [2024-11-10 18:14:03,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 75.76923076923077) internal successors, (985), 13 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:03,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:03,751 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:03,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:14:03,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:03,953 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:03,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash -399560201, now seen corresponding path program 1 times [2024-11-10 18:14:03,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:03,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165702277] [2024-11-10 18:14:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:03,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:14:04,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:04,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165702277] [2024-11-10 18:14:04,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165702277] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:04,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:04,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:04,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665027727] [2024-11-10 18:14:04,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:04,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:04,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:04,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:04,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:14:04,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-10 18:14:04,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 132 transitions, 347 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:04,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:04,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-10 18:14:04,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:04,389 INFO L124 PetriNetUnfolderBase]: 2265/5019 cut-off events. [2024-11-10 18:14:04,390 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-10 18:14:04,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8144 conditions, 5019 events. 2265/5019 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40747 event pairs, 1414 based on Foata normal form. 1/3871 useless extension candidates. Maximal degree in co-relation 8096. Up to 3030 conditions per place. [2024-11-10 18:14:04,419 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 58 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2024-11-10 18:14:04,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 131 transitions, 467 flow [2024-11-10 18:14:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:14:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:14:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2024-11-10 18:14:04,421 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-11-10 18:14:04,421 INFO L175 Difference]: Start difference. First operand has 130 places, 132 transitions, 347 flow. Second operand 4 states and 366 transitions. [2024-11-10 18:14:04,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 131 transitions, 467 flow [2024-11-10 18:14:04,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 131 transitions, 442 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-10 18:14:04,423 INFO L231 Difference]: Finished difference. Result has 129 places, 131 transitions, 333 flow [2024-11-10 18:14:04,423 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=333, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2024-11-10 18:14:04,424 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 3 predicate places. [2024-11-10 18:14:04,424 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 333 flow [2024-11-10 18:14:04,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:04,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:04,424 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:04,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:14:04,425 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:04,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:04,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1351085577, now seen corresponding path program 1 times [2024-11-10 18:14:04,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:04,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200213482] [2024-11-10 18:14:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:04,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:04,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200213482] [2024-11-10 18:14:04,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200213482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:04,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:04,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:04,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681013045] [2024-11-10 18:14:04,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:04,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:14:04,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:04,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:14:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:14:04,681 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-10 18:14:04,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:04,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:04,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-10 18:14:04,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:05,057 INFO L124 PetriNetUnfolderBase]: 2265/5022 cut-off events. [2024-11-10 18:14:05,057 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-10 18:14:05,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8146 conditions, 5022 events. 2265/5022 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40753 event pairs, 1414 based on Foata normal form. 0/3871 useless extension candidates. Maximal degree in co-relation 8097. Up to 3033 conditions per place. [2024-11-10 18:14:05,081 INFO L140 encePairwiseOnDemand]: 132/138 looper letters, 61 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2024-11-10 18:14:05,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 133 transitions, 469 flow [2024-11-10 18:14:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:14:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:14:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 356 transitions. [2024-11-10 18:14:05,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-11-10 18:14:05,082 INFO L175 Difference]: Start difference. First operand has 129 places, 131 transitions, 333 flow. Second operand 4 states and 356 transitions. [2024-11-10 18:14:05,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 133 transitions, 469 flow [2024-11-10 18:14:05,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 133 transitions, 459 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:14:05,085 INFO L231 Difference]: Finished difference. Result has 130 places, 132 transitions, 346 flow [2024-11-10 18:14:05,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=346, PETRI_PLACES=130, PETRI_TRANSITIONS=132} [2024-11-10 18:14:05,087 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 4 predicate places. [2024-11-10 18:14:05,087 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 132 transitions, 346 flow [2024-11-10 18:14:05,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:05,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:05,087 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:05,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:14:05,088 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:05,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:05,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2050733474, now seen corresponding path program 1 times [2024-11-10 18:14:05,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:05,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224286965] [2024-11-10 18:14:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:05,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:05,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:05,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224286965] [2024-11-10 18:14:05,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224286965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:05,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439396913] [2024-11-10 18:14:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:05,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:05,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:05,322 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:14:05,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:14:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:05,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:14:05,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:05,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-10 18:14:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:05,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:05,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439396913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:05,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:05,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:14:05,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615960756] [2024-11-10 18:14:05,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:05,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:14:05,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:14:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:14:06,476 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-10 18:14:06,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 132 transitions, 346 flow. Second operand has 13 states, 13 states have (on average 76.38461538461539) internal successors, (993), 13 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:06,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:06,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-10 18:14:06,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:07,174 INFO L124 PetriNetUnfolderBase]: 2266/5026 cut-off events. [2024-11-10 18:14:07,174 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-11-10 18:14:07,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8160 conditions, 5026 events. 2266/5026 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40815 event pairs, 1414 based on Foata normal form. 0/3877 useless extension candidates. Maximal degree in co-relation 8110. Up to 3020 conditions per place. [2024-11-10 18:14:07,206 INFO L140 encePairwiseOnDemand]: 128/138 looper letters, 51 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-11-10 18:14:07,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 500 flow [2024-11-10 18:14:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:14:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:14:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 807 transitions. [2024-11-10 18:14:07,208 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5847826086956521 [2024-11-10 18:14:07,208 INFO L175 Difference]: Start difference. First operand has 130 places, 132 transitions, 346 flow. Second operand 10 states and 807 transitions. [2024-11-10 18:14:07,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 500 flow [2024-11-10 18:14:07,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 495 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:07,210 INFO L231 Difference]: Finished difference. Result has 136 places, 135 transitions, 385 flow [2024-11-10 18:14:07,210 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=385, PETRI_PLACES=136, PETRI_TRANSITIONS=135} [2024-11-10 18:14:07,211 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 10 predicate places. [2024-11-10 18:14:07,211 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 135 transitions, 385 flow [2024-11-10 18:14:07,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.38461538461539) internal successors, (993), 13 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:07,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:07,212 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:07,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:14:07,415 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 [2024-11-10 18:14:07,416 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:07,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1783696489, now seen corresponding path program 1 times [2024-11-10 18:14:07,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:07,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906412524] [2024-11-10 18:14:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:07,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:07,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906412524] [2024-11-10 18:14:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906412524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128579133] [2024-11-10 18:14:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:07,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:07,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:07,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:14:07,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:14:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:07,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 18:14:07,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:07,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:14:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:07,801 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:14:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128579133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:07,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:14:07,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-10 18:14:07,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787659098] [2024-11-10 18:14:07,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:07,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:07,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:07,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-10 18:14:07,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-10 18:14:07,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 135 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:07,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:07,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-10 18:14:07,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:08,326 INFO L124 PetriNetUnfolderBase]: 2267/5032 cut-off events. [2024-11-10 18:14:08,327 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-10 18:14:08,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8184 conditions, 5032 events. 2267/5032 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40796 event pairs, 1414 based on Foata normal form. 0/3883 useless extension candidates. Maximal degree in co-relation 8130. Up to 3038 conditions per place. [2024-11-10 18:14:08,363 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 66 selfloop transitions, 5 changer transitions 0/138 dead transitions. [2024-11-10 18:14:08,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 138 transitions, 533 flow [2024-11-10 18:14:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:14:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:14:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 365 transitions. [2024-11-10 18:14:08,366 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6612318840579711 [2024-11-10 18:14:08,366 INFO L175 Difference]: Start difference. First operand has 136 places, 135 transitions, 385 flow. Second operand 4 states and 365 transitions. [2024-11-10 18:14:08,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 138 transitions, 533 flow [2024-11-10 18:14:08,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 138 transitions, 515 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-10 18:14:08,369 INFO L231 Difference]: Finished difference. Result has 136 places, 137 transitions, 391 flow [2024-11-10 18:14:08,369 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=391, PETRI_PLACES=136, PETRI_TRANSITIONS=137} [2024-11-10 18:14:08,370 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 10 predicate places. [2024-11-10 18:14:08,370 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 137 transitions, 391 flow [2024-11-10 18:14:08,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:08,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:08,371 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:08,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:14:08,574 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 [2024-11-10 18:14:08,575 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:08,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1783696490, now seen corresponding path program 1 times [2024-11-10 18:14:08,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:08,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446022719] [2024-11-10 18:14:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:08,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:08,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:08,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446022719] [2024-11-10 18:14:08,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446022719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:08,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:08,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:14:08,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592486792] [2024-11-10 18:14:08,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:08,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:14:08,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:08,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:14:08,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:14:08,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-10 18:14:08,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 137 transitions, 391 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:08,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:08,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-10 18:14:08,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:09,018 INFO L124 PetriNetUnfolderBase]: 2267/5028 cut-off events. [2024-11-10 18:14:09,018 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-11-10 18:14:09,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8177 conditions, 5028 events. 2267/5028 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 40778 event pairs, 1414 based on Foata normal form. 2/3884 useless extension candidates. Maximal degree in co-relation 8123. Up to 3026 conditions per place. [2024-11-10 18:14:09,048 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 64 selfloop transitions, 3 changer transitions 0/134 dead transitions. [2024-11-10 18:14:09,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 134 transitions, 519 flow [2024-11-10 18:14:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:14:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:14:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2024-11-10 18:14:09,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6859903381642513 [2024-11-10 18:14:09,049 INFO L175 Difference]: Start difference. First operand has 136 places, 137 transitions, 391 flow. Second operand 3 states and 284 transitions. [2024-11-10 18:14:09,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 134 transitions, 519 flow [2024-11-10 18:14:09,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 134 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:09,051 INFO L231 Difference]: Finished difference. Result has 133 places, 134 transitions, 385 flow [2024-11-10 18:14:09,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=385, PETRI_PLACES=133, PETRI_TRANSITIONS=134} [2024-11-10 18:14:09,052 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 7 predicate places. [2024-11-10 18:14:09,052 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 134 transitions, 385 flow [2024-11-10 18:14:09,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:09,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:09,053 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:09,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:14:09,053 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:09,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:09,053 INFO L85 PathProgramCache]: Analyzing trace with hash -765470395, now seen corresponding path program 1 times [2024-11-10 18:14:09,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:09,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267706729] [2024-11-10 18:14:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:09,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267706729] [2024-11-10 18:14:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267706729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107892476] [2024-11-10 18:14:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:09,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:09,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:09,143 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:14:09,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:14:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:09,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 18:14:09,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:09,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:09,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107892476] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:09,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:09,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:14:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11932672] [2024-11-10 18:14:09,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:09,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:14:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:14:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:14:09,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-10 18:14:09,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 134 transitions, 385 flow. Second operand has 14 states, 14 states have (on average 76.21428571428571) internal successors, (1067), 14 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:09,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:09,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-10 18:14:09,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:10,370 INFO L124 PetriNetUnfolderBase]: 4462/9831 cut-off events. [2024-11-10 18:14:10,371 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-11-10 18:14:10,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16019 conditions, 9831 events. 4462/9831 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 89388 event pairs, 2808 based on Foata normal form. 0/7672 useless extension candidates. Maximal degree in co-relation 8125. Up to 3019 conditions per place. [2024-11-10 18:14:10,434 INFO L140 encePairwiseOnDemand]: 119/138 looper letters, 89 selfloop transitions, 48 changer transitions 0/198 dead transitions. [2024-11-10 18:14:10,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 198 transitions, 849 flow [2024-11-10 18:14:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:14:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:14:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1080 transitions. [2024-11-10 18:14:10,436 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6020066889632107 [2024-11-10 18:14:10,436 INFO L175 Difference]: Start difference. First operand has 133 places, 134 transitions, 385 flow. Second operand 13 states and 1080 transitions. [2024-11-10 18:14:10,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 198 transitions, 849 flow [2024-11-10 18:14:10,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 837 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:10,439 INFO L231 Difference]: Finished difference. Result has 148 places, 160 transitions, 645 flow [2024-11-10 18:14:10,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=645, PETRI_PLACES=148, PETRI_TRANSITIONS=160} [2024-11-10 18:14:10,440 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 22 predicate places. [2024-11-10 18:14:10,440 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 160 transitions, 645 flow [2024-11-10 18:14:10,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.21428571428571) internal successors, (1067), 14 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:10,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:10,441 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:10,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 18:14:10,644 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,SelfDestructingSolverStorable10 [2024-11-10 18:14:10,645 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:10,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:10,645 INFO L85 PathProgramCache]: Analyzing trace with hash -767617289, now seen corresponding path program 1 times [2024-11-10 18:14:10,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:10,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723839415] [2024-11-10 18:14:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:10,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:10,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:10,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723839415] [2024-11-10 18:14:10,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723839415] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:10,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:10,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:10,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704346554] [2024-11-10 18:14:10,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:10,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:10,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:10,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:10,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:14:10,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-10 18:14:10,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 160 transitions, 645 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:10,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:10,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-10 18:14:10,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:11,400 INFO L124 PetriNetUnfolderBase]: 4528/10035 cut-off events. [2024-11-10 18:14:11,401 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2024-11-10 18:14:11,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16369 conditions, 10035 events. 4528/10035 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 91694 event pairs, 2828 based on Foata normal form. 2/7745 useless extension candidates. Maximal degree in co-relation 8154. Up to 6063 conditions per place. [2024-11-10 18:14:11,463 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 86 selfloop transitions, 7 changer transitions 0/158 dead transitions. [2024-11-10 18:14:11,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 158 transitions, 816 flow [2024-11-10 18:14:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:14:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:14:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 364 transitions. [2024-11-10 18:14:11,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-11-10 18:14:11,467 INFO L175 Difference]: Start difference. First operand has 148 places, 160 transitions, 645 flow. Second operand 4 states and 364 transitions. [2024-11-10 18:14:11,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 158 transitions, 816 flow [2024-11-10 18:14:11,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 158 transitions, 808 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 18:14:11,470 INFO L231 Difference]: Finished difference. Result has 150 places, 157 transitions, 640 flow [2024-11-10 18:14:11,471 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=640, PETRI_PLACES=150, PETRI_TRANSITIONS=157} [2024-11-10 18:14:11,471 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 24 predicate places. [2024-11-10 18:14:11,471 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 157 transitions, 640 flow [2024-11-10 18:14:11,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:11,471 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:11,472 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:11,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:14:11,472 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:11,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1625088453, now seen corresponding path program 2 times [2024-11-10 18:14:11,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:11,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259707941] [2024-11-10 18:14:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:11,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:11,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259707941] [2024-11-10 18:14:11,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259707941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633509609] [2024-11-10 18:14:11,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:14:11,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:11,762 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:14:11,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:14:11,861 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:14:11,862 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:14:11,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-10 18:14:11,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:11,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:14:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:11,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:12,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633509609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:12,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:12,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-10 18:14:12,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557561766] [2024-11-10 18:14:12,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:12,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 18:14:12,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:12,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 18:14:12,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-11-10 18:14:13,319 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 138 [2024-11-10 18:14:13,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 157 transitions, 640 flow. Second operand has 22 states, 22 states have (on average 73.13636363636364) internal successors, (1609), 22 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:13,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:13,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 138 [2024-11-10 18:14:13,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:15,867 INFO L124 PetriNetUnfolderBase]: 8925/19679 cut-off events. [2024-11-10 18:14:15,867 INFO L125 PetriNetUnfolderBase]: For 492/492 co-relation queries the response was YES. [2024-11-10 18:14:15,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32263 conditions, 19679 events. 8925/19679 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 190166 event pairs, 5616 based on Foata normal form. 1/15364 useless extension candidates. Maximal degree in co-relation 8240. Up to 6057 conditions per place. [2024-11-10 18:14:15,977 INFO L140 encePairwiseOnDemand]: 121/138 looper letters, 183 selfloop transitions, 76 changer transitions 0/317 dead transitions. [2024-11-10 18:14:15,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 317 transitions, 1875 flow [2024-11-10 18:14:15,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-10 18:14:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-10 18:14:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1700 transitions. [2024-11-10 18:14:15,981 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5866114561766735 [2024-11-10 18:14:15,981 INFO L175 Difference]: Start difference. First operand has 150 places, 157 transitions, 640 flow. Second operand 21 states and 1700 transitions. [2024-11-10 18:14:15,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 317 transitions, 1875 flow [2024-11-10 18:14:15,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 317 transitions, 1849 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:14:15,987 INFO L231 Difference]: Finished difference. Result has 173 places, 210 transitions, 1260 flow [2024-11-10 18:14:15,987 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1260, PETRI_PLACES=173, PETRI_TRANSITIONS=210} [2024-11-10 18:14:15,988 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 47 predicate places. [2024-11-10 18:14:15,988 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 210 transitions, 1260 flow [2024-11-10 18:14:15,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 73.13636363636364) internal successors, (1609), 22 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:15,988 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:15,989 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:16,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 18:14:16,192 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 [2024-11-10 18:14:16,193 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:16,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2146904713, now seen corresponding path program 1 times [2024-11-10 18:14:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:16,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673964925] [2024-11-10 18:14:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:16,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:16,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:16,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673964925] [2024-11-10 18:14:16,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673964925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:16,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679285910] [2024-11-10 18:14:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:16,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:16,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:16,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:14:16,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:14:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:16,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 18:14:16,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:16,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:14:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:16,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:16,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679285910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:16,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:16,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-10 18:14:16,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503255207] [2024-11-10 18:14:16,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:16,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 18:14:16,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:16,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 18:14:16,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-10 18:14:17,006 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-10 18:14:17,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 210 transitions, 1260 flow. Second operand has 15 states, 15 states have (on average 76.8) internal successors, (1152), 15 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:17,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:17,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-10 18:14:17,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:20,805 INFO L124 PetriNetUnfolderBase]: 17843/39315 cut-off events. [2024-11-10 18:14:20,806 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2024-11-10 18:14:20,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64518 conditions, 39315 events. 17843/39315 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 422038 event pairs, 11232 based on Foata normal form. 0/30691 useless extension candidates. Maximal degree in co-relation 48530. Up to 12098 conditions per place. [2024-11-10 18:14:21,074 INFO L140 encePairwiseOnDemand]: 127/138 looper letters, 195 selfloop transitions, 54 changer transitions 0/313 dead transitions. [2024-11-10 18:14:21,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 313 transitions, 2378 flow [2024-11-10 18:14:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:14:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:14:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 858 transitions. [2024-11-10 18:14:21,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-11-10 18:14:21,081 INFO L175 Difference]: Start difference. First operand has 173 places, 210 transitions, 1260 flow. Second operand 10 states and 858 transitions. [2024-11-10 18:14:21,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 313 transitions, 2378 flow [2024-11-10 18:14:21,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 313 transitions, 2326 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-10 18:14:21,096 INFO L231 Difference]: Finished difference. Result has 182 places, 243 transitions, 1736 flow [2024-11-10 18:14:21,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1736, PETRI_PLACES=182, PETRI_TRANSITIONS=243} [2024-11-10 18:14:21,101 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 56 predicate places. [2024-11-10 18:14:21,101 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 243 transitions, 1736 flow [2024-11-10 18:14:21,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 76.8) internal successors, (1152), 15 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:21,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:21,102 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:21,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 18:14:21,302 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 [2024-11-10 18:14:21,306 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:21,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash -137495519, now seen corresponding path program 3 times [2024-11-10 18:14:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:21,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214136103] [2024-11-10 18:14:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:14:21,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214136103] [2024-11-10 18:14:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214136103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123403076] [2024-11-10 18:14:21,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:14:21,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:21,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:21,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:14:21,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:14:21,571 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:14:21,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:14:21,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 18:14:21,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:21,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:14:21,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-10 18:14:21,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:14:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 18:14:21,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 18:14:21,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123403076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:21,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:21,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-10 18:14:21,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924345937] [2024-11-10 18:14:21,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:21,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 18:14:21,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:21,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 18:14:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-10 18:14:23,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 138 [2024-11-10 18:14:23,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 243 transitions, 1736 flow. Second operand has 21 states, 21 states have (on average 73.80952380952381) internal successors, (1550), 21 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:23,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:23,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 138 [2024-11-10 18:14:23,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:27,603 INFO L124 PetriNetUnfolderBase]: 17837/39283 cut-off events. [2024-11-10 18:14:27,603 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2024-11-10 18:14:27,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64580 conditions, 39283 events. 17837/39283 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 1454. Compared 421962 event pairs, 11232 based on Foata normal form. 6/30665 useless extension candidates. Maximal degree in co-relation 48980. Up to 12052 conditions per place. [2024-11-10 18:14:27,962 INFO L140 encePairwiseOnDemand]: 120/138 looper letters, 145 selfloop transitions, 92 changer transitions 0/295 dead transitions. [2024-11-10 18:14:27,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 295 transitions, 2405 flow [2024-11-10 18:14:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-10 18:14:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-10 18:14:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1832 transitions. [2024-11-10 18:14:27,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5531400966183575 [2024-11-10 18:14:27,967 INFO L175 Difference]: Start difference. First operand has 182 places, 243 transitions, 1736 flow. Second operand 24 states and 1832 transitions. [2024-11-10 18:14:27,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 295 transitions, 2405 flow [2024-11-10 18:14:27,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 295 transitions, 2390 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-10 18:14:27,980 INFO L231 Difference]: Finished difference. Result has 202 places, 247 transitions, 1928 flow [2024-11-10 18:14:27,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1928, PETRI_PLACES=202, PETRI_TRANSITIONS=247} [2024-11-10 18:14:27,981 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 76 predicate places. [2024-11-10 18:14:27,981 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 247 transitions, 1928 flow [2024-11-10 18:14:27,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 73.80952380952381) internal successors, (1550), 21 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:27,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:27,982 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:27,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 18:14:28,182 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,SelfDestructingSolverStorable14 [2024-11-10 18:14:28,183 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:28,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2081456224, now seen corresponding path program 1 times [2024-11-10 18:14:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:28,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066478684] [2024-11-10 18:14:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:28,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:28,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066478684] [2024-11-10 18:14:28,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066478684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:28,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046224417] [2024-11-10 18:14:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:28,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:28,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:28,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:14:28,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:14:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:28,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 18:14:28,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:28,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:28,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046224417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:28,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:28,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-10 18:14:28,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171104293] [2024-11-10 18:14:28,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:28,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:14:28,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:28,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:14:28,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:14:28,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-10 18:14:28,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 247 transitions, 1928 flow. Second operand has 14 states, 14 states have (on average 76.5) internal successors, (1071), 14 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:28,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:28,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-10 18:14:28,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:32,722 INFO L124 PetriNetUnfolderBase]: 17833/39271 cut-off events. [2024-11-10 18:14:32,722 INFO L125 PetriNetUnfolderBase]: For 1555/1555 co-relation queries the response was YES. [2024-11-10 18:14:32,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64692 conditions, 39271 events. 17833/39271 cut-off events. For 1555/1555 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 421510 event pairs, 11232 based on Foata normal form. 4/30667 useless extension candidates. Maximal degree in co-relation 33500. Up to 12068 conditions per place. [2024-11-10 18:14:33,012 INFO L140 encePairwiseOnDemand]: 120/138 looper letters, 141 selfloop transitions, 124 changer transitions 0/325 dead transitions. [2024-11-10 18:14:33,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 325 transitions, 2942 flow [2024-11-10 18:14:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:14:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:14:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1076 transitions. [2024-11-10 18:14:33,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5997770345596433 [2024-11-10 18:14:33,015 INFO L175 Difference]: Start difference. First operand has 202 places, 247 transitions, 1928 flow. Second operand 13 states and 1076 transitions. [2024-11-10 18:14:33,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 325 transitions, 2942 flow [2024-11-10 18:14:33,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 325 transitions, 2811 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-11-10 18:14:33,026 INFO L231 Difference]: Finished difference. Result has 204 places, 269 transitions, 2376 flow [2024-11-10 18:14:33,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2376, PETRI_PLACES=204, PETRI_TRANSITIONS=269} [2024-11-10 18:14:33,026 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 78 predicate places. [2024-11-10 18:14:33,026 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 269 transitions, 2376 flow [2024-11-10 18:14:33,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.5) internal successors, (1071), 14 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:33,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:33,027 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:33,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-10 18:14:33,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 18:14:33,228 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:33,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2081703690, now seen corresponding path program 1 times [2024-11-10 18:14:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:33,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745275437] [2024-11-10 18:14:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:33,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 18:14:33,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:33,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745275437] [2024-11-10 18:14:33,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745275437] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:33,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:14:33,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:14:33,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178373077] [2024-11-10 18:14:33,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:33,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:33,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:33,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:14:33,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-10 18:14:33,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 269 transitions, 2376 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:33,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:33,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-10 18:14:33,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:37,411 INFO L124 PetriNetUnfolderBase]: 18097/40087 cut-off events. [2024-11-10 18:14:37,412 INFO L125 PetriNetUnfolderBase]: For 1788/1788 co-relation queries the response was YES. [2024-11-10 18:14:37,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65848 conditions, 40087 events. 18097/40087 cut-off events. For 1788/1788 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 433051 event pairs, 11312 based on Foata normal form. 8/30927 useless extension candidates. Maximal degree in co-relation 49648. Up to 24228 conditions per place. [2024-11-10 18:14:37,972 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 178 selfloop transitions, 11 changer transitions 0/261 dead transitions. [2024-11-10 18:14:37,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 261 transitions, 2653 flow [2024-11-10 18:14:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:14:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:14:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 364 transitions. [2024-11-10 18:14:37,975 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-11-10 18:14:37,975 INFO L175 Difference]: Start difference. First operand has 204 places, 269 transitions, 2376 flow. Second operand 4 states and 364 transitions. [2024-11-10 18:14:37,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 261 transitions, 2653 flow [2024-11-10 18:14:37,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 261 transitions, 2451 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-11-10 18:14:37,992 INFO L231 Difference]: Finished difference. Result has 198 places, 260 transitions, 2107 flow [2024-11-10 18:14:37,993 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2107, PETRI_PLACES=198, PETRI_TRANSITIONS=260} [2024-11-10 18:14:37,993 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 72 predicate places. [2024-11-10 18:14:37,993 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 260 transitions, 2107 flow [2024-11-10 18:14:37,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:37,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:37,997 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:37,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-10 18:14:37,997 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:37,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:37,998 INFO L85 PathProgramCache]: Analyzing trace with hash 383869024, now seen corresponding path program 2 times [2024-11-10 18:14:37,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:37,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020192667] [2024-11-10 18:14:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:37,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:38,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:38,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020192667] [2024-11-10 18:14:38,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020192667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:38,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999404522] [2024-11-10 18:14:38,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:14:38,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:38,391 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:14:38,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:14:38,576 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:14:38,576 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:14:38,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-10 18:14:38,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:38,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:14:38,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2024-11-10 18:14:38,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-10 18:14:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:38,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:14:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:14:38,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999404522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:14:38,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:14:38,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2024-11-10 18:14:38,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110227849] [2024-11-10 18:14:38,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:14:38,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 18:14:38,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:38,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 18:14:38,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-10 18:14:40,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 138 [2024-11-10 18:14:40,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 260 transitions, 2107 flow. Second operand has 22 states, 22 states have (on average 74.13636363636364) internal successors, (1631), 22 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:40,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:40,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 138 [2024-11-10 18:14:40,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:14:47,348 INFO L124 PetriNetUnfolderBase]: 26600/58475 cut-off events. [2024-11-10 18:14:47,348 INFO L125 PetriNetUnfolderBase]: For 2233/2233 co-relation queries the response was YES. [2024-11-10 18:14:47,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96359 conditions, 58475 events. 26600/58475 cut-off events. For 2233/2233 co-relation queries the response was YES. Maximal size of possible extension queue 1921. Compared 654102 event pairs, 16808 based on Foata normal form. 8/45831 useless extension candidates. Maximal degree in co-relation 72623. Up to 12116 conditions per place. [2024-11-10 18:14:48,028 INFO L140 encePairwiseOnDemand]: 123/138 looper letters, 295 selfloop transitions, 86 changer transitions 0/439 dead transitions. [2024-11-10 18:14:48,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 439 transitions, 4127 flow [2024-11-10 18:14:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 18:14:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 18:14:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1313 transitions. [2024-11-10 18:14:48,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5946557971014492 [2024-11-10 18:14:48,031 INFO L175 Difference]: Start difference. First operand has 198 places, 260 transitions, 2107 flow. Second operand 16 states and 1313 transitions. [2024-11-10 18:14:48,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 439 transitions, 4127 flow [2024-11-10 18:14:48,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 439 transitions, 4095 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:14:48,048 INFO L231 Difference]: Finished difference. Result has 216 places, 315 transitions, 3119 flow [2024-11-10 18:14:48,048 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3119, PETRI_PLACES=216, PETRI_TRANSITIONS=315} [2024-11-10 18:14:48,052 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 90 predicate places. [2024-11-10 18:14:48,052 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 315 transitions, 3119 flow [2024-11-10 18:14:48,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 74.13636363636364) internal successors, (1631), 22 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:48,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:14:48,053 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:14:48,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 18:14:48,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 18:14:48,254 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-10 18:14:48,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:14:48,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2074047021, now seen corresponding path program 1 times [2024-11-10 18:14:48,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:14:48,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521512923] [2024-11-10 18:14:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:48,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:14:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 18:14:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:14:48,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521512923] [2024-11-10 18:14:48,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521512923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:14:48,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252150799] [2024-11-10 18:14:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:14:48,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:14:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:14:48,869 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:14:48,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:14:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:14:49,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-10 18:14:49,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:14:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:14:49,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2024-11-10 18:14:49,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-10 18:14:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 18:14:49,456 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:14:49,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252150799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:14:49,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:14:49,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2024-11-10 18:14:49,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785438345] [2024-11-10 18:14:49,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:14:49,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:14:49,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:14:49,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:14:49,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-10 18:14:49,543 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-10 18:14:49,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 315 transitions, 3119 flow. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:14:49,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:14:49,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-10 18:14:49,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand