./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 20:49:18,286 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 20:49:18,365 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-12 20:49:18,370 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 20:49:18,370 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 20:49:18,408 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 20:49:18,409 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 20:49:18,409 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 20:49:18,410 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 20:49:18,411 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 20:49:18,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 20:49:18,411 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 20:49:18,412 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 20:49:18,412 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 20:49:18,413 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 20:49:18,413 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 20:49:18,415 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 20:49:18,417 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 20:49:18,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 20:49:18,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 20:49:18,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 20:49:18,419 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 20:49:18,419 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 20:49:18,419 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 20:49:18,420 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 20:49:18,420 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-12 20:49:18,420 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 20:49:18,420 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 20:49:18,420 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 20:49:18,421 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 20:49:18,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 20:49:18,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 20:49:18,421 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 20:49:18,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 20:49:18,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 20:49:18,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 20:49:18,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 20:49:18,423 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 20:49:18,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 20:49:18,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 20:49:18,424 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 20:49:18,424 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 20:49:18,425 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 20:49:18,425 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 20:49:18,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2024-11-12 20:49:18,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 20:49:18,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 20:49:18,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 20:49:18,681 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 20:49:18,682 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 20:49:18,683 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2024-11-12 20:49:20,116 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 20:49:20,370 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 20:49:20,372 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2024-11-12 20:49:20,388 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8381a9b/335938c9bfe74f70b7f6aa57febc6607/FLAG0f0b2afed [2024-11-12 20:49:20,400 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8381a9b/335938c9bfe74f70b7f6aa57febc6607 [2024-11-12 20:49:20,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 20:49:20,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 20:49:20,405 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 20:49:20,405 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 20:49:20,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 20:49:20,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:20,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2348ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20, skipping insertion in model container [2024-11-12 20:49:20,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:20,463 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 20:49:20,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 20:49:20,878 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 20:49:20,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 20:49:20,979 INFO L204 MainTranslator]: Completed translation [2024-11-12 20:49:20,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20 WrapperNode [2024-11-12 20:49:20,980 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 20:49:20,984 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 20:49:20,984 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 20:49:20,984 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 20:49:20,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,031 INFO L138 Inliner]: procedures = 168, calls = 40, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 146 [2024-11-12 20:49:21,033 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 20:49:21,036 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 20:49:21,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 20:49:21,037 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 20:49:21,047 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,050 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,068 INFO L175 MemorySlicer]: Split 23 memory accesses to 4 slices as follows [2, 1, 12, 8]. 52 percent of accesses are in the largest equivalence class. The 21 initializations are split as follows [2, 1, 10, 8]. The 1 writes are split as follows [0, 0, 1, 0]. [2024-11-12 20:49:21,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,076 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,085 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,092 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,096 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 20:49:21,101 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 20:49:21,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 20:49:21,102 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 20:49:21,103 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (1/1) ... [2024-11-12 20:49:21,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 20:49:21,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 20:49:21,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 20:49:21,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 20:49:21,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 20:49:21,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 20:49:21,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 20:49:21,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-12 20:49:21,194 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-12 20:49:21,194 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-12 20:49:21,194 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-12 20:49:21,195 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-12 20:49:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 20:49:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 20:49:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 20:49:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-12 20:49:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 20:49:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 20:49:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-12 20:49:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-12 20:49:21,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-12 20:49:21,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-12 20:49:21,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 20:49:21,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 20:49:21,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 20:49:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-12 20:49:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 20:49:21,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 20:49:21,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 20:49:21,199 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 20:49:21,333 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 20:49:21,335 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 20:49:21,613 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 20:49:21,613 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 20:49:21,952 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 20:49:21,952 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-12 20:49:21,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:49:21 BoogieIcfgContainer [2024-11-12 20:49:21,953 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 20:49:21,956 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 20:49:21,956 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 20:49:21,959 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 20:49:21,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:49:20" (1/3) ... [2024-11-12 20:49:21,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b29e1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:49:21, skipping insertion in model container [2024-11-12 20:49:21,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:49:20" (2/3) ... [2024-11-12 20:49:21,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b29e1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:49:21, skipping insertion in model container [2024-11-12 20:49:21,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:49:21" (3/3) ... [2024-11-12 20:49:21,963 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2024-11-12 20:49:21,980 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 20:49:21,980 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-11-12 20:49:21,980 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 20:49:22,034 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 20:49:22,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 32 transitions, 78 flow [2024-11-12 20:49:22,106 INFO L124 PetriNetUnfolderBase]: 2/30 cut-off events. [2024-11-12 20:49:22,106 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 20:49:22,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 30 events. 2/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-11-12 20:49:22,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 32 transitions, 78 flow [2024-11-12 20:49:22,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 28 transitions, 65 flow [2024-11-12 20:49:22,121 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 20:49:22,130 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@7f32a303, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 20:49:22,130 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-11-12 20:49:22,141 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 20:49:22,141 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2024-11-12 20:49:22,141 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 20:49:22,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 20:49:22,142 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 20:49:22,143 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-11-12 20:49:22,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 20:49:22,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1989886668, now seen corresponding path program 1 times [2024-11-12 20:49:22,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 20:49:22,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495517024] [2024-11-12 20:49:22,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 20:49:22,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 20:49:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 20:49:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 20:49:22,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 20:49:22,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495517024] [2024-11-12 20:49:22,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495517024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 20:49:22,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 20:49:22,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 20:49:22,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794104409] [2024-11-12 20:49:22,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 20:49:22,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 20:49:22,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 20:49:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 20:49:22,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 20:49:22,633 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-11-12 20:49:22,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:22,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 20:49:22,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-11-12 20:49:22,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 20:49:22,972 INFO L124 PetriNetUnfolderBase]: 330/632 cut-off events. [2024-11-12 20:49:22,973 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-12 20:49:22,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 632 events. 330/632 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2726 event pairs, 180 based on Foata normal form. 32/636 useless extension candidates. Maximal degree in co-relation 1190. Up to 368 conditions per place. [2024-11-12 20:49:22,983 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 44 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2024-11-12 20:49:22,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 215 flow [2024-11-12 20:49:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 20:49:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 20:49:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-11-12 20:49:22,996 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-11-12 20:49:22,998 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 65 flow. Second operand 4 states and 82 transitions. [2024-11-12 20:49:22,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 215 flow [2024-11-12 20:49:23,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 53 transitions, 208 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 20:49:23,004 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 84 flow [2024-11-12 20:49:23,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-11-12 20:49:23,011 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2024-11-12 20:49:23,011 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 84 flow [2024-11-12 20:49:23,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:23,012 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 20:49:23,012 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 20:49:23,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 20:49:23,013 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-11-12 20:49:23,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 20:49:23,014 INFO L85 PathProgramCache]: Analyzing trace with hash 882834533, now seen corresponding path program 1 times [2024-11-12 20:49:23,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 20:49:23,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438018607] [2024-11-12 20:49:23,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 20:49:23,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 20:49:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 20:49:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 20:49:23,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 20:49:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438018607] [2024-11-12 20:49:23,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438018607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 20:49:23,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 20:49:23,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 20:49:23,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022154993] [2024-11-12 20:49:23,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 20:49:23,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 20:49:23,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 20:49:23,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 20:49:23,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 20:49:23,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-11-12 20:49:23,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:23,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 20:49:23,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-11-12 20:49:23,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 20:49:23,454 INFO L124 PetriNetUnfolderBase]: 543/1050 cut-off events. [2024-11-12 20:49:23,455 INFO L125 PetriNetUnfolderBase]: For 277/305 co-relation queries the response was YES. [2024-11-12 20:49:23,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 1050 events. 543/1050 cut-off events. For 277/305 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4952 event pairs, 313 based on Foata normal form. 50/1071 useless extension candidates. Maximal degree in co-relation 1778. Up to 609 conditions per place. [2024-11-12 20:49:23,466 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 48 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-11-12 20:49:23,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 274 flow [2024-11-12 20:49:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 20:49:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 20:49:23,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-11-12 20:49:23,470 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-12 20:49:23,470 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 84 flow. Second operand 4 states and 80 transitions. [2024-11-12 20:49:23,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 274 flow [2024-11-12 20:49:23,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 57 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 20:49:23,473 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 106 flow [2024-11-12 20:49:23,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-11-12 20:49:23,474 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2024-11-12 20:49:23,475 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 106 flow [2024-11-12 20:49:23,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:23,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 20:49:23,477 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-12 20:49:23,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 20:49:23,479 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-11-12 20:49:23,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 20:49:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash -125218871, now seen corresponding path program 1 times [2024-11-12 20:49:23,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 20:49:23,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031678857] [2024-11-12 20:49:23,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 20:49:23,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 20:49:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 20:49:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 20:49:23,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 20:49:23,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031678857] [2024-11-12 20:49:23,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031678857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 20:49:23,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985734305] [2024-11-12 20:49:23,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 20:49:23,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 20:49:23,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 20:49:23,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 20:49:23,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 20:49:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 20:49:23,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 20:49:23,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 20:49:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 20:49:23,871 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 20:49:23,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985734305] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 20:49:23,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 20:49:23,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-12 20:49:23,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244408009] [2024-11-12 20:49:23,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 20:49:23,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 20:49:23,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 20:49:23,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 20:49:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-12 20:49:23,885 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-11-12 20:49:23,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:23,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 20:49:23,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-11-12 20:49:23,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 20:49:24,208 INFO L124 PetriNetUnfolderBase]: 507/973 cut-off events. [2024-11-12 20:49:24,209 INFO L125 PetriNetUnfolderBase]: For 363/409 co-relation queries the response was YES. [2024-11-12 20:49:24,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2293 conditions, 973 events. 507/973 cut-off events. For 363/409 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4541 event pairs, 11 based on Foata normal form. 26/972 useless extension candidates. Maximal degree in co-relation 2127. Up to 370 conditions per place. [2024-11-12 20:49:24,215 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 71 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2024-11-12 20:49:24,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 82 transitions, 428 flow [2024-11-12 20:49:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 20:49:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 20:49:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-11-12 20:49:24,217 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2024-11-12 20:49:24,217 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 106 flow. Second operand 6 states and 115 transitions. [2024-11-12 20:49:24,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 82 transitions, 428 flow [2024-11-12 20:49:24,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 82 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 20:49:24,222 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 110 flow [2024-11-12 20:49:24,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2024-11-12 20:49:24,223 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 9 predicate places. [2024-11-12 20:49:24,223 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 110 flow [2024-11-12 20:49:24,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:24,224 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 20:49:24,224 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-12 20:49:24,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 20:49:24,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 20:49:24,425 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-11-12 20:49:24,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 20:49:24,426 INFO L85 PathProgramCache]: Analyzing trace with hash 413182727, now seen corresponding path program 1 times [2024-11-12 20:49:24,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 20:49:24,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093455854] [2024-11-12 20:49:24,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 20:49:24,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 20:49:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 20:49:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 20:49:24,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 20:49:24,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093455854] [2024-11-12 20:49:24,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093455854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 20:49:24,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 20:49:24,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 20:49:24,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071781026] [2024-11-12 20:49:24,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 20:49:24,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 20:49:24,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 20:49:24,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 20:49:24,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 20:49:24,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-12 20:49:24,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:24,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 20:49:24,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-12 20:49:24,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 20:49:24,712 INFO L124 PetriNetUnfolderBase]: 545/1007 cut-off events. [2024-11-12 20:49:24,712 INFO L125 PetriNetUnfolderBase]: For 602/634 co-relation queries the response was YES. [2024-11-12 20:49:24,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 1007 events. 545/1007 cut-off events. For 602/634 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4727 event pairs, 94 based on Foata normal form. 26/1033 useless extension candidates. Maximal degree in co-relation 1168. Up to 576 conditions per place. [2024-11-12 20:49:24,719 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 41 selfloop transitions, 6 changer transitions 3/55 dead transitions. [2024-11-12 20:49:24,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 288 flow [2024-11-12 20:49:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 20:49:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 20:49:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-11-12 20:49:24,721 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-11-12 20:49:24,721 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 110 flow. Second operand 4 states and 71 transitions. [2024-11-12 20:49:24,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 288 flow [2024-11-12 20:49:24,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 279 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-12 20:49:24,724 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 113 flow [2024-11-12 20:49:24,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2024-11-12 20:49:24,725 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2024-11-12 20:49:24,725 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 113 flow [2024-11-12 20:49:24,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:24,726 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 20:49:24,726 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 20:49:24,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 20:49:24,726 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-11-12 20:49:24,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 20:49:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash 695291899, now seen corresponding path program 1 times [2024-11-12 20:49:24,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 20:49:24,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358319628] [2024-11-12 20:49:24,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 20:49:24,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 20:49:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 20:49:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 20:49:24,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 20:49:24,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358319628] [2024-11-12 20:49:24,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358319628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 20:49:24,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247882480] [2024-11-12 20:49:24,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 20:49:24,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 20:49:24,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 20:49:24,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 20:49:24,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 20:49:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 20:49:24,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 20:49:24,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 20:49:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 20:49:24,995 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 20:49:24,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247882480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 20:49:24,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 20:49:24,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-12 20:49:24,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283007676] [2024-11-12 20:49:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 20:49:24,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 20:49:24,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 20:49:24,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 20:49:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-12 20:49:25,010 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-11-12 20:49:25,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:25,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 20:49:25,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-11-12 20:49:25,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 20:49:25,325 INFO L124 PetriNetUnfolderBase]: 469/907 cut-off events. [2024-11-12 20:49:25,325 INFO L125 PetriNetUnfolderBase]: For 732/732 co-relation queries the response was YES. [2024-11-12 20:49:25,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2280 conditions, 907 events. 469/907 cut-off events. For 732/732 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4041 event pairs, 33 based on Foata normal form. 25/906 useless extension candidates. Maximal degree in co-relation 1753. Up to 273 conditions per place. [2024-11-12 20:49:25,331 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 66 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2024-11-12 20:49:25,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 76 transitions, 461 flow [2024-11-12 20:49:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 20:49:25,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 20:49:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-11-12 20:49:25,333 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2024-11-12 20:49:25,333 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 113 flow. Second operand 6 states and 110 transitions. [2024-11-12 20:49:25,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 76 transitions, 461 flow [2024-11-12 20:49:25,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 76 transitions, 425 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 20:49:25,336 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 111 flow [2024-11-12 20:49:25,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2024-11-12 20:49:25,337 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 9 predicate places. [2024-11-12 20:49:25,337 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 111 flow [2024-11-12 20:49:25,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:25,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 20:49:25,338 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 20:49:25,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 20:49:25,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 20:49:25,542 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-11-12 20:49:25,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 20:49:25,542 INFO L85 PathProgramCache]: Analyzing trace with hash 79212832, now seen corresponding path program 1 times [2024-11-12 20:49:25,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 20:49:25,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105968653] [2024-11-12 20:49:25,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 20:49:25,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 20:49:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 20:49:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 20:49:25,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 20:49:25,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105968653] [2024-11-12 20:49:25,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105968653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 20:49:25,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 20:49:25,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 20:49:25,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469707520] [2024-11-12 20:49:25,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 20:49:25,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 20:49:25,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 20:49:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 20:49:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 20:49:25,605 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-12 20:49:25,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 29 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:25,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 20:49:25,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-12 20:49:25,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 20:49:25,787 INFO L124 PetriNetUnfolderBase]: 506/925 cut-off events. [2024-11-12 20:49:25,787 INFO L125 PetriNetUnfolderBase]: For 721/721 co-relation queries the response was YES. [2024-11-12 20:49:25,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 925 events. 506/925 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4032 event pairs, 68 based on Foata normal form. 25/949 useless extension candidates. Maximal degree in co-relation 1875. Up to 558 conditions per place. [2024-11-12 20:49:25,791 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2024-11-12 20:49:25,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 291 flow [2024-11-12 20:49:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 20:49:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 20:49:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-12 20:49:25,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-11-12 20:49:25,793 INFO L175 Difference]: Start difference. First operand has 42 places, 29 transitions, 111 flow. Second operand 4 states and 68 transitions. [2024-11-12 20:49:25,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 291 flow [2024-11-12 20:49:25,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 278 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-12 20:49:25,796 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2024-11-12 20:49:25,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2024-11-12 20:49:25,798 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2024-11-12 20:49:25,799 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2024-11-12 20:49:25,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 20:49:25,803 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-11-12 20:49:25,803 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 10 remaining) [2024-11-12 20:49:25,803 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2024-11-12 20:49:25,803 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2024-11-12 20:49:25,804 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2024-11-12 20:49:25,804 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2024-11-12 20:49:25,804 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2024-11-12 20:49:25,804 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2024-11-12 20:49:25,805 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2024-11-12 20:49:25,805 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2024-11-12 20:49:25,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 20:49:25,806 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-12 20:49:25,811 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-12 20:49:25,812 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-12 20:49:25,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 08:49:25 BasicIcfg [2024-11-12 20:49:25,818 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-12 20:49:25,819 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-12 20:49:25,819 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-12 20:49:25,819 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-12 20:49:25,820 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:49:21" (3/4) ... [2024-11-12 20:49:25,823 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-12 20:49:25,826 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2024-11-12 20:49:25,826 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2024-11-12 20:49:25,831 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 60 nodes and edges [2024-11-12 20:49:25,832 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-11-12 20:49:25,832 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-12 20:49:25,832 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-12 20:49:25,926 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-12 20:49:25,927 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-12 20:49:25,927 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-12 20:49:25,927 INFO L158 Benchmark]: Toolchain (without parser) took 5523.59ms. Allocated memory was 172.0MB in the beginning and 239.1MB in the end (delta: 67.1MB). Free memory was 118.8MB in the beginning and 184.2MB in the end (delta: -65.4MB). Peak memory consumption was 3.0MB. Max. memory is 16.1GB. [2024-11-12 20:49:25,928 INFO L158 Benchmark]: CDTParser took 0.87ms. Allocated memory is still 172.0MB. Free memory was 140.0MB in the beginning and 139.8MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-12 20:49:25,928 INFO L158 Benchmark]: CACSL2BoogieTranslator took 576.51ms. Allocated memory is still 172.0MB. Free memory was 118.2MB in the beginning and 95.1MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-11-12 20:49:25,928 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.28ms. Allocated memory is still 172.0MB. Free memory was 95.1MB in the beginning and 93.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-12 20:49:25,928 INFO L158 Benchmark]: Boogie Preprocessor took 59.36ms. Allocated memory is still 172.0MB. Free memory was 93.0MB in the beginning and 90.2MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-12 20:49:25,929 INFO L158 Benchmark]: RCFGBuilder took 852.49ms. Allocated memory is still 172.0MB. Free memory was 90.2MB in the beginning and 124.6MB in the end (delta: -34.4MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. [2024-11-12 20:49:25,929 INFO L158 Benchmark]: TraceAbstraction took 3862.50ms. Allocated memory was 172.0MB in the beginning and 239.1MB in the end (delta: 67.1MB). Free memory was 123.4MB in the beginning and 188.6MB in the end (delta: -65.2MB). Peak memory consumption was 126.7MB. Max. memory is 16.1GB. [2024-11-12 20:49:25,929 INFO L158 Benchmark]: Witness Printer took 107.95ms. Allocated memory is still 239.1MB. Free memory was 188.6MB in the beginning and 184.2MB in the end (delta: 4.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-12 20:49:25,931 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87ms. Allocated memory is still 172.0MB. Free memory was 140.0MB in the beginning and 139.8MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 576.51ms. Allocated memory is still 172.0MB. Free memory was 118.2MB in the beginning and 95.1MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.28ms. Allocated memory is still 172.0MB. Free memory was 95.1MB in the beginning and 93.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.36ms. Allocated memory is still 172.0MB. Free memory was 93.0MB in the beginning and 90.2MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 852.49ms. Allocated memory is still 172.0MB. Free memory was 90.2MB in the beginning and 124.6MB in the end (delta: -34.4MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. * TraceAbstraction took 3862.50ms. Allocated memory was 172.0MB in the beginning and 239.1MB in the end (delta: 67.1MB). Free memory was 123.4MB in the beginning and 188.6MB in the end (delta: -65.2MB). Peak memory consumption was 126.7MB. Max. memory is 16.1GB. * Witness Printer took 107.95ms. Allocated memory is still 239.1MB. Free memory was 188.6MB in the beginning and 184.2MB in the end (delta: 4.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 724]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 724]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 740]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 740]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 55 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.7s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 220 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 193 mSDsluCounter, 31 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 799 IncrementalHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 16 mSDtfsCounter, 799 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=4, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 268 SizeOfPredicates, 4 NumberOfNonLiveVariables, 330 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 26/38 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-12 20:49:25,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE