./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/no-overflow.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 23:55:08,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 23:55:08,280 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-10-14 23:55:08,286 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 23:55:08,286 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 23:55:08,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 23:55:08,321 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 23:55:08,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 23:55:08,322 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 23:55:08,323 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 23:55:08,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 23:55:08,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 23:55:08,324 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 23:55:08,326 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 23:55:08,326 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 23:55:08,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 23:55:08,327 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 23:55:08,327 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 23:55:08,328 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 23:55:08,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 23:55:08,331 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 23:55:08,332 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 23:55:08,332 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 23:55:08,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 23:55:08,333 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 23:55:08,333 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-10-14 23:55:08,333 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 23:55:08,334 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 23:55:08,334 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 23:55:08,334 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 23:55:08,335 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 23:55:08,335 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 23:55:08,335 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 23:55:08,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 23:55:08,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 23:55:08,336 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 23:55:08,337 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 23:55:08,337 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 23:55:08,337 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 23:55:08,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 23:55:08,338 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 23:55:08,339 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 23:55:08,339 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 23:55:08,340 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 23:55:08,340 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2024-10-14 23:55:08,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 23:55:08,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 23:55:08,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 23:55:08,621 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 23:55:08,624 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 23:55:08,626 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-10-14 23:55:10,120 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 23:55:10,354 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 23:55:10,354 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-10-14 23:55:10,371 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dabea0299/25a53b60b74a4bfb924798158e13b2ad/FLAG5f45c7489 [2024-10-14 23:55:10,383 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dabea0299/25a53b60b74a4bfb924798158e13b2ad [2024-10-14 23:55:10,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 23:55:10,387 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 23:55:10,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 23:55:10,388 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 23:55:10,393 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 23:55:10,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,395 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c5fc34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10, skipping insertion in model container [2024-10-14 23:55:10,395 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,436 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 23:55:10,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 23:55:10,793 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 23:55:10,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 23:55:10,887 INFO L204 MainTranslator]: Completed translation [2024-10-14 23:55:10,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10 WrapperNode [2024-10-14 23:55:10,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 23:55:10,889 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 23:55:10,889 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 23:55:10,889 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 23:55:10,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,915 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,939 INFO L138 Inliner]: procedures = 170, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2024-10-14 23:55:10,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 23:55:10,940 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 23:55:10,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 23:55:10,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 23:55:10,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,952 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,988 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 6, 5]. 33 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5]. The 2 writes are split as follows [0, 0, 2, 0]. [2024-10-14 23:55:10,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,994 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:10,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:11,000 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:11,003 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 23:55:11,004 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 23:55:11,004 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 23:55:11,004 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 23:55:11,005 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (1/1) ... [2024-10-14 23:55:11,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 23:55:11,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 23:55:11,061 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) [2024-10-14 23:55:11,064 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 [2024-10-14 23:55:11,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 23:55:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 23:55:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 23:55:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-14 23:55:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 23:55:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 23:55:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 23:55:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-14 23:55:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-14 23:55:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 23:55:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-14 23:55:11,119 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-14 23:55:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 23:55:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 23:55:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 23:55:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-14 23:55:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-14 23:55:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 23:55:11,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 23:55:11,122 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 23:55:11,284 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 23:55:11,286 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 23:55:11,519 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 23:55:11,519 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 23:55:11,728 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 23:55:11,729 INFO L314 CfgBuilder]: Removed 9 assume(true) statements. [2024-10-14 23:55:11,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:11 BoogieIcfgContainer [2024-10-14 23:55:11,730 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 23:55:11,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 23:55:11,732 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 23:55:11,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 23:55:11,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:55:10" (1/3) ... [2024-10-14 23:55:11,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f8abc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:11, skipping insertion in model container [2024-10-14 23:55:11,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10" (2/3) ... [2024-10-14 23:55:11,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f8abc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:11, skipping insertion in model container [2024-10-14 23:55:11,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:11" (3/3) ... [2024-10-14 23:55:11,738 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2024-10-14 23:55:11,755 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 23:55:11,755 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-10-14 23:55:11,755 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 23:55:11,801 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 23:55:11,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 52 transitions, 108 flow [2024-10-14 23:55:11,885 INFO L124 PetriNetUnfolderBase]: 10/65 cut-off events. [2024-10-14 23:55:11,885 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 23:55:11,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 65 events. 10/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 197 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2024-10-14 23:55:11,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 52 transitions, 108 flow [2024-10-14 23:55:11,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 52 transitions, 108 flow [2024-10-14 23:55:11,907 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 23:55:11,915 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=LoopHeads, 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;@6f3a3c8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 23:55:11,916 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-10-14 23:55:11,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 23:55:11,923 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-10-14 23:55:11,924 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 23:55:11,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:11,925 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 23:55:11,925 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-10-14 23:55:11,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash 329751728, now seen corresponding path program 1 times [2024-10-14 23:55:11,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:11,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629773132] [2024-10-14 23:55:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 23:55:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 23:55:12,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 23:55:12,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629773132] [2024-10-14 23:55:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629773132] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 23:55:12,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 23:55:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 23:55:12,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128940380] [2024-10-14 23:55:12,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 23:55:12,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 23:55:12,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 23:55:12,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 23:55:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 23:55:12,302 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 52 [2024-10-14 23:55:12,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 52 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-10-14 23:55:12,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 23:55:12,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 52 [2024-10-14 23:55:12,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 23:55:12,526 INFO L124 PetriNetUnfolderBase]: 121/364 cut-off events. [2024-10-14 23:55:12,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 23:55:12,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 364 events. 121/364 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1793 event pairs, 22 based on Foata normal form. 72/402 useless extension candidates. Maximal degree in co-relation 612. Up to 169 conditions per place. [2024-10-14 23:55:12,533 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 38 selfloop transitions, 4 changer transitions 4/65 dead transitions. [2024-10-14 23:55:12,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 226 flow [2024-10-14 23:55:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 23:55:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 23:55:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-10-14 23:55:12,546 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-10-14 23:55:12,547 INFO L175 Difference]: Start difference. First operand has 47 places, 52 transitions, 108 flow. Second operand 4 states and 143 transitions. [2024-10-14 23:55:12,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 226 flow [2024-10-14 23:55:12,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 226 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 23:55:12,552 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 98 flow [2024-10-14 23:55:12,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-10-14 23:55:12,559 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2024-10-14 23:55:12,560 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 98 flow [2024-10-14 23:55:12,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-10-14 23:55:12,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:12,560 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 23:55:12,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 23:55:12,561 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-10-14 23:55:12,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1632369309, now seen corresponding path program 1 times [2024-10-14 23:55:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:12,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540621503] [2024-10-14 23:55:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 23:55:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 23:55:12,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 23:55:12,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540621503] [2024-10-14 23:55:12,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540621503] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 23:55:12,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 23:55:12,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 23:55:12,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55431151] [2024-10-14 23:55:12,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 23:55:12,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 23:55:12,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 23:55:12,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 23:55:12,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 23:55:12,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 52 [2024-10-14 23:55:12,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-10-14 23:55:12,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 23:55:12,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 52 [2024-10-14 23:55:12,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 23:55:12,851 INFO L124 PetriNetUnfolderBase]: 110/320 cut-off events. [2024-10-14 23:55:12,855 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-10-14 23:55:12,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 320 events. 110/320 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1498 event pairs, 0 based on Foata normal form. 13/327 useless extension candidates. Maximal degree in co-relation 582. Up to 208 conditions per place. [2024-10-14 23:55:12,858 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 43 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2024-10-14 23:55:12,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 234 flow [2024-10-14 23:55:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 23:55:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 23:55:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-10-14 23:55:12,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-10-14 23:55:12,860 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 98 flow. Second operand 4 states and 124 transitions. [2024-10-14 23:55:12,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 234 flow [2024-10-14 23:55:12,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 23:55:12,863 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 98 flow [2024-10-14 23:55:12,864 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-10-14 23:55:12,864 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2024-10-14 23:55:12,865 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 98 flow [2024-10-14 23:55:12,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-10-14 23:55:12,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:12,865 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-14 23:55:12,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 23:55:12,866 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-10-14 23:55:12,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1043853526, now seen corresponding path program 1 times [2024-10-14 23:55:12,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:12,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429664073] [2024-10-14 23:55:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:12,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 23:55:12,893 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 23:55:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 23:55:12,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 23:55:12,937 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 23:55:12,941 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2024-10-14 23:55:12,944 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 11 remaining) [2024-10-14 23:55:12,944 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 11 remaining) [2024-10-14 23:55:12,944 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 11 remaining) [2024-10-14 23:55:12,944 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 11 remaining) [2024-10-14 23:55:12,945 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 11 remaining) [2024-10-14 23:55:12,945 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 11 remaining) [2024-10-14 23:55:12,945 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 11 remaining) [2024-10-14 23:55:12,945 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 11 remaining) [2024-10-14 23:55:12,945 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 11 remaining) [2024-10-14 23:55:12,945 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 11 remaining) [2024-10-14 23:55:12,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 23:55:12,946 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-14 23:55:12,948 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 23:55:12,949 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-14 23:55:13,008 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 23:55:13,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 84 transitions, 178 flow [2024-10-14 23:55:13,042 INFO L124 PetriNetUnfolderBase]: 18/115 cut-off events. [2024-10-14 23:55:13,043 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 23:55:13,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 115 events. 18/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 411 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 80. Up to 6 conditions per place. [2024-10-14 23:55:13,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 84 transitions, 178 flow [2024-10-14 23:55:13,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 84 transitions, 178 flow [2024-10-14 23:55:13,049 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 23:55:13,054 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=LoopHeads, 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;@6f3a3c8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 23:55:13,054 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-14 23:55:13,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 23:55:13,058 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-10-14 23:55:13,058 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 23:55:13,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:13,059 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 23:55:13,059 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 23:55:13,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:13,060 INFO L85 PathProgramCache]: Analyzing trace with hash 409943139, now seen corresponding path program 1 times [2024-10-14 23:55:13,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:13,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25787996] [2024-10-14 23:55:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:13,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 23:55:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 23:55:13,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 23:55:13,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25787996] [2024-10-14 23:55:13,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25787996] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 23:55:13,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 23:55:13,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 23:55:13,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393473081] [2024-10-14 23:55:13,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 23:55:13,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 23:55:13,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 23:55:13,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 23:55:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 23:55:13,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 84 [2024-10-14 23:55:13,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2024-10-14 23:55:13,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 23:55:13,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 84 [2024-10-14 23:55:13,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 23:55:13,959 INFO L124 PetriNetUnfolderBase]: 3157/6383 cut-off events. [2024-10-14 23:55:13,959 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-10-14 23:55:13,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11463 conditions, 6383 events. 3157/6383 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 50443 event pairs, 657 based on Foata normal form. 1482/7360 useless extension candidates. Maximal degree in co-relation 8222. Up to 3025 conditions per place. [2024-10-14 23:55:13,994 INFO L140 encePairwiseOnDemand]: 65/84 looper letters, 76 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2024-10-14 23:55:13,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 396 flow [2024-10-14 23:55:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 23:55:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 23:55:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 251 transitions. [2024-10-14 23:55:13,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7470238095238095 [2024-10-14 23:55:13,998 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 178 flow. Second operand 4 states and 251 transitions. [2024-10-14 23:55:13,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 396 flow [2024-10-14 23:55:14,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 113 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 23:55:14,003 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 156 flow [2024-10-14 23:55:14,003 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-10-14 23:55:14,004 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2024-10-14 23:55:14,004 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 156 flow [2024-10-14 23:55:14,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2024-10-14 23:55:14,005 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:14,005 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 23:55:14,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 23:55:14,006 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 23:55:14,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:14,006 INFO L85 PathProgramCache]: Analyzing trace with hash -176664162, now seen corresponding path program 1 times [2024-10-14 23:55:14,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:14,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087694467] [2024-10-14 23:55:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:14,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 23:55:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 23:55:14,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 23:55:14,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087694467] [2024-10-14 23:55:14,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087694467] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 23:55:14,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 23:55:14,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 23:55:14,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035532693] [2024-10-14 23:55:14,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 23:55:14,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 23:55:14,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 23:55:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 23:55:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 23:55:14,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 84 [2024-10-14 23:55:14,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2024-10-14 23:55:14,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 23:55:14,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 84 [2024-10-14 23:55:14,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 23:55:14,832 INFO L124 PetriNetUnfolderBase]: 3146/6834 cut-off events. [2024-10-14 23:55:14,833 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-10-14 23:55:14,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12354 conditions, 6834 events. 3146/6834 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 56460 event pairs, 1452 based on Foata normal form. 13/6533 useless extension candidates. Maximal degree in co-relation 999. Up to 4972 conditions per place. [2024-10-14 23:55:14,940 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 58 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2024-10-14 23:55:14,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 94 transitions, 332 flow [2024-10-14 23:55:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 23:55:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 23:55:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-10-14 23:55:14,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-10-14 23:55:14,944 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 156 flow. Second operand 4 states and 195 transitions. [2024-10-14 23:55:14,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 94 transitions, 332 flow [2024-10-14 23:55:14,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 94 transitions, 320 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 23:55:14,949 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 170 flow [2024-10-14 23:55:14,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2024-10-14 23:55:14,951 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 4 predicate places. [2024-10-14 23:55:14,951 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 170 flow [2024-10-14 23:55:14,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2024-10-14 23:55:14,952 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:14,953 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 23:55:14,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 23:55:14,953 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 23:55:14,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1940909862, now seen corresponding path program 1 times [2024-10-14 23:55:14,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:14,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428984229] [2024-10-14 23:55:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:14,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 23:55:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 23:55:15,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 23:55:15,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428984229] [2024-10-14 23:55:15,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428984229] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 23:55:15,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 23:55:15,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 23:55:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399546970] [2024-10-14 23:55:15,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 23:55:15,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 23:55:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 23:55:15,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 23:55:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 23:55:15,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2024-10-14 23:55:15,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 23:55:15,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 23:55:15,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2024-10-14 23:55:15,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 23:55:15,774 INFO L124 PetriNetUnfolderBase]: 3033/6476 cut-off events. [2024-10-14 23:55:15,775 INFO L125 PetriNetUnfolderBase]: For 394/566 co-relation queries the response was YES. [2024-10-14 23:55:15,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11737 conditions, 6476 events. 3033/6476 cut-off events. For 394/566 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 51684 event pairs, 949 based on Foata normal form. 141/6280 useless extension candidates. Maximal degree in co-relation 11636. Up to 4227 conditions per place. [2024-10-14 23:55:15,815 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 82 selfloop transitions, 6 changer transitions 0/122 dead transitions. [2024-10-14 23:55:15,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 476 flow [2024-10-14 23:55:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 23:55:15,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 23:55:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-10-14 23:55:15,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-10-14 23:55:15,818 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 170 flow. Second operand 5 states and 259 transitions. [2024-10-14 23:55:15,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 476 flow [2024-10-14 23:55:15,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 122 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 23:55:15,822 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 212 flow [2024-10-14 23:55:15,822 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-10-14 23:55:15,823 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 10 predicate places. [2024-10-14 23:55:15,823 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 212 flow [2024-10-14 23:55:15,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 23:55:15,823 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:15,824 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-10-14 23:55:15,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 23:55:15,824 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 23:55:15,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:15,825 INFO L85 PathProgramCache]: Analyzing trace with hash 325381133, now seen corresponding path program 1 times [2024-10-14 23:55:15,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:15,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709920564] [2024-10-14 23:55:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:15,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 23:55:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 23:55:15,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 23:55:15,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709920564] [2024-10-14 23:55:15,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709920564] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 23:55:15,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 23:55:15,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 23:55:15,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344062685] [2024-10-14 23:55:15,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 23:55:15,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 23:55:15,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 23:55:15,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 23:55:15,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 23:55:15,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 84 [2024-10-14 23:55:15,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2024-10-14 23:55:15,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 23:55:15,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 84 [2024-10-14 23:55:15,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 23:55:16,631 INFO L124 PetriNetUnfolderBase]: 3039/5896 cut-off events. [2024-10-14 23:55:16,631 INFO L125 PetriNetUnfolderBase]: For 1030/1030 co-relation queries the response was YES. [2024-10-14 23:55:16,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12103 conditions, 5896 events. 3039/5896 cut-off events. For 1030/1030 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 44636 event pairs, 253 based on Foata normal form. 0/5793 useless extension candidates. Maximal degree in co-relation 11221. Up to 3633 conditions per place. [2024-10-14 23:55:16,665 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 91 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2024-10-14 23:55:16,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 130 transitions, 558 flow [2024-10-14 23:55:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 23:55:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 23:55:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 213 transitions. [2024-10-14 23:55:16,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-10-14 23:55:16,668 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 212 flow. Second operand 4 states and 213 transitions. [2024-10-14 23:55:16,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 130 transitions, 558 flow [2024-10-14 23:55:16,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 130 transitions, 558 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 23:55:16,677 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 228 flow [2024-10-14 23:55:16,677 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2024-10-14 23:55:16,678 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 13 predicate places. [2024-10-14 23:55:16,678 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 228 flow [2024-10-14 23:55:16,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2024-10-14 23:55:16,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:16,679 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2024-10-14 23:55:16,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 23:55:16,680 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 23:55:16,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:16,680 INFO L85 PathProgramCache]: Analyzing trace with hash -841330459, now seen corresponding path program 1 times [2024-10-14 23:55:16,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:16,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976051641] [2024-10-14 23:55:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:16,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 23:55:16,695 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 23:55:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 23:55:16,710 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 23:55:16,711 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 23:55:16,711 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2024-10-14 23:55:16,711 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 15 remaining) [2024-10-14 23:55:16,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 15 remaining) [2024-10-14 23:55:16,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 15 remaining) [2024-10-14 23:55:16,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 15 remaining) [2024-10-14 23:55:16,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 15 remaining) [2024-10-14 23:55:16,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 15 remaining) [2024-10-14 23:55:16,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 15 remaining) [2024-10-14 23:55:16,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 15 remaining) [2024-10-14 23:55:16,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 15 remaining) [2024-10-14 23:55:16,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 15 remaining) [2024-10-14 23:55:16,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 15 remaining) [2024-10-14 23:55:16,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 15 remaining) [2024-10-14 23:55:16,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 15 remaining) [2024-10-14 23:55:16,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 15 remaining) [2024-10-14 23:55:16,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 23:55:16,717 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-10-14 23:55:16,718 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 23:55:16,718 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-14 23:55:16,751 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-14 23:55:16,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 116 transitions, 250 flow [2024-10-14 23:55:16,771 INFO L124 PetriNetUnfolderBase]: 26/165 cut-off events. [2024-10-14 23:55:16,771 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-14 23:55:16,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 165 events. 26/165 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 626 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2024-10-14 23:55:16,774 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 116 transitions, 250 flow [2024-10-14 23:55:16,776 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 116 transitions, 250 flow [2024-10-14 23:55:16,777 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 23:55:16,780 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=LoopHeads, 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;@6f3a3c8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 23:55:16,780 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-10-14 23:55:16,782 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 23:55:16,782 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-10-14 23:55:16,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 23:55:16,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:16,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 23:55:16,784 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2024-10-14 23:55:16,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:16,786 INFO L85 PathProgramCache]: Analyzing trace with hash 520672310, now seen corresponding path program 1 times [2024-10-14 23:55:16,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:16,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396896957] [2024-10-14 23:55:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:16,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 23:55:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 23:55:16,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 23:55:16,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396896957] [2024-10-14 23:55:16,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396896957] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 23:55:16,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 23:55:16,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 23:55:16,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305428415] [2024-10-14 23:55:16,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 23:55:16,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 23:55:16,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 23:55:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 23:55:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 23:55:16,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 116 [2024-10-14 23:55:16,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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) [2024-10-14 23:55:16,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 23:55:16,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 116 [2024-10-14 23:55:16,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 23:55:24,315 INFO L124 PetriNetUnfolderBase]: 58597/97332 cut-off events. [2024-10-14 23:55:24,315 INFO L125 PetriNetUnfolderBase]: For 930/930 co-relation queries the response was YES. [2024-10-14 23:55:24,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179165 conditions, 97332 events. 58597/97332 cut-off events. For 930/930 co-relation queries the response was YES. Maximal size of possible extension queue 2293. Compared 915332 event pairs, 12897 based on Foata normal form. 25190/116265 useless extension candidates. Maximal degree in co-relation 112706. Up to 48385 conditions per place. [2024-10-14 23:55:25,205 INFO L140 encePairwiseOnDemand]: 91/116 looper letters, 110 selfloop transitions, 4 changer transitions 0/161 dead transitions. [2024-10-14 23:55:25,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 161 transitions, 568 flow [2024-10-14 23:55:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 23:55:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 23:55:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 359 transitions. [2024-10-14 23:55:25,207 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7737068965517241 [2024-10-14 23:55:25,208 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 250 flow. Second operand 4 states and 359 transitions. [2024-10-14 23:55:25,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 161 transitions, 568 flow [2024-10-14 23:55:25,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 566 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-14 23:55:25,215 INFO L231 Difference]: Finished difference. Result has 105 places, 95 transitions, 214 flow [2024-10-14 23:55:25,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=105, PETRI_TRANSITIONS=95} [2024-10-14 23:55:25,216 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2024-10-14 23:55:25,216 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 95 transitions, 214 flow [2024-10-14 23:55:25,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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) [2024-10-14 23:55:25,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:25,216 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 23:55:25,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 23:55:25,216 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2024-10-14 23:55:25,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1039027041, now seen corresponding path program 1 times [2024-10-14 23:55:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:25,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503625204] [2024-10-14 23:55:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:25,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 23:55:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 23:55:25,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 23:55:25,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503625204] [2024-10-14 23:55:25,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503625204] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 23:55:25,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 23:55:25,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 23:55:25,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646157566] [2024-10-14 23:55:25,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 23:55:25,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 23:55:25,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 23:55:25,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 23:55:25,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 23:55:25,267 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 116 [2024-10-14 23:55:25,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 95 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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) [2024-10-14 23:55:25,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 23:55:25,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 116 [2024-10-14 23:55:25,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 23:55:32,308 INFO L124 PetriNetUnfolderBase]: 58586/103326 cut-off events. [2024-10-14 23:55:32,308 INFO L125 PetriNetUnfolderBase]: For 6139/6139 co-relation queries the response was YES. [2024-10-14 23:55:32,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190639 conditions, 103326 events. 58586/103326 cut-off events. For 6139/6139 co-relation queries the response was YES. Maximal size of possible extension queue 2535. Compared 1026125 event pairs, 41644 based on Foata normal form. 13/98839 useless extension candidates. Maximal degree in co-relation 42699. Up to 81148 conditions per place. [2024-10-14 23:55:33,349 INFO L140 encePairwiseOnDemand]: 111/116 looper letters, 70 selfloop transitions, 3 changer transitions 0/120 dead transitions. [2024-10-14 23:55:33,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 120 transitions, 414 flow [2024-10-14 23:55:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 23:55:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 23:55:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 263 transitions. [2024-10-14 23:55:33,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5668103448275862 [2024-10-14 23:55:33,351 INFO L175 Difference]: Start difference. First operand has 105 places, 95 transitions, 214 flow. Second operand 4 states and 263 transitions. [2024-10-14 23:55:33,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 120 transitions, 414 flow [2024-10-14 23:55:33,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 120 transitions, 402 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 23:55:33,362 INFO L231 Difference]: Finished difference. Result has 107 places, 97 transitions, 228 flow [2024-10-14 23:55:33,362 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2024-10-14 23:55:33,363 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, 4 predicate places. [2024-10-14 23:55:33,363 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 228 flow [2024-10-14 23:55:33,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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) [2024-10-14 23:55:33,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 23:55:33,364 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 23:55:33,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 23:55:33,364 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2024-10-14 23:55:33,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 23:55:33,365 INFO L85 PathProgramCache]: Analyzing trace with hash 349841753, now seen corresponding path program 1 times [2024-10-14 23:55:33,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 23:55:33,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104256947] [2024-10-14 23:55:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 23:55:33,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 23:55:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 23:55:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 23:55:33,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 23:55:33,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104256947] [2024-10-14 23:55:33,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104256947] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 23:55:33,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 23:55:33,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 23:55:33,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028267509] [2024-10-14 23:55:33,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 23:55:33,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 23:55:33,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 23:55:33,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 23:55:33,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 23:55:33,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 116 [2024-10-14 23:55:33,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 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) [2024-10-14 23:55:33,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 23:55:33,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 116 [2024-10-14 23:55:33,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand