./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:37:47,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:37:47,506 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:37:47,513 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:37:47,516 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:37:47,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:37:47,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:37:47,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:37:47,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:37:47,548 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:37:47,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:37:47,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:37:47,550 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:37:47,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:37:47,551 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:37:47,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:37:47,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:37:47,553 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:37:47,553 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:37:47,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:37:47,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:37:47,557 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:37:47,557 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:37:47,557 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:37:47,558 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:37:47,558 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:37:47,558 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:37:47,558 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:37:47,559 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:37:47,559 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:37:47,559 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:37:47,559 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:37:47,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:37:47,560 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:37:47,560 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:37:47,560 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:37:47,560 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:37:47,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:37:47,561 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:37:47,561 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:37:47,561 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:37:47,562 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:37:47,563 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2024-10-11 14:37:47,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:37:47,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:37:47,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:37:47,841 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:37:47,842 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:37:47,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2024-10-11 14:37:49,359 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:37:49,635 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:37:49,636 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2024-10-11 14:37:49,656 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/5de8f023c/c805878beb6e44739b1875d6171a6c77/FLAGe4a0710a1 [2024-10-11 14:37:49,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/5de8f023c/c805878beb6e44739b1875d6171a6c77 [2024-10-11 14:37:49,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:37:49,676 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:37:49,680 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:37:49,680 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:37:49,686 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:37:49,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:37:49" (1/1) ... [2024-10-11 14:37:49,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181e3abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:49, skipping insertion in model container [2024-10-11 14:37:49,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:37:49" (1/1) ... [2024-10-11 14:37:49,738 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:37:50,106 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2024-10-11 14:37:50,124 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2024-10-11 14:37:50,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:37:50,150 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:37:50,203 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2024-10-11 14:37:50,206 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2024-10-11 14:37:50,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:37:50,256 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:37:50,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50 WrapperNode [2024-10-11 14:37:50,256 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:37:50,257 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:37:50,257 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:37:50,258 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:37:50,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,280 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,306 INFO L138 Inliner]: procedures = 168, calls = 28, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 129 [2024-10-11 14:37:50,306 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:37:50,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:37:50,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:37:50,308 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:37:50,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,320 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,346 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 1, 3, 8]. 57 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 8]. The 2 writes are split as follows [0, 0, 2, 0]. [2024-10-11 14:37:50,348 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,348 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,360 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,367 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,369 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,374 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:37:50,381 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:37:50,381 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:37:50,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:37:50,382 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (1/1) ... [2024-10-11 14:37:50,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:37:50,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:37:50,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:37:50,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:37:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:37:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:37:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 14:37:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 14:37:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-11 14:37:50,475 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-11 14:37:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-11 14:37:50,475 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-11 14:37:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:37:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:37:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 14:37:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 14:37:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 14:37:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:37:50,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:37:50,481 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:37:50,672 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:37:50,675 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:37:50,965 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:37:50,969 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:37:51,175 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:37:51,175 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 14:37:51,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:37:51 BoogieIcfgContainer [2024-10-11 14:37:51,176 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:37:51,178 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:37:51,178 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:37:51,182 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:37:51,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:37:49" (1/3) ... [2024-10-11 14:37:51,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe193e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:37:51, skipping insertion in model container [2024-10-11 14:37:51,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:50" (2/3) ... [2024-10-11 14:37:51,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe193e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:37:51, skipping insertion in model container [2024-10-11 14:37:51,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:37:51" (3/3) ... [2024-10-11 14:37:51,185 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2024-10-11 14:37:51,199 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:37:51,199 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-11 14:37:51,199 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:37:51,256 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:37:51,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 41 transitions, 96 flow [2024-10-11 14:37:51,314 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2024-10-11 14:37:51,314 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:37:51,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 39 events. 7/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 91 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-10-11 14:37:51,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 41 transitions, 96 flow [2024-10-11 14:37:51,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 37 transitions, 83 flow [2024-10-11 14:37:51,335 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:37:51,346 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;@25dfca8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:37:51,346 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-11 14:37:51,360 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:37:51,360 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2024-10-11 14:37:51,361 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 14:37:51,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:51,362 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:51,362 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 14:37:51,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1303306350, now seen corresponding path program 1 times [2024-10-11 14:37:51,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:51,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642706387] [2024-10-11 14:37:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:51,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:51,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:51,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642706387] [2024-10-11 14:37:51,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642706387] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:51,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:51,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:37:51,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979709321] [2024-10-11 14:37:51,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:51,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:37:51,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:37:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:37:52,025 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-11 14:37:52,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-10-11 14:37:52,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:52,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-11 14:37:52,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:52,199 INFO L124 PetriNetUnfolderBase]: 308/547 cut-off events. [2024-10-11 14:37:52,202 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-10-11 14:37:52,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 547 events. 308/547 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2464 event pairs, 217 based on Foata normal form. 39/520 useless extension candidates. Maximal degree in co-relation 996. Up to 476 conditions per place. [2024-10-11 14:37:52,213 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 23 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2024-10-11 14:37:52,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 123 flow [2024-10-11 14:37:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:37:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:37:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-10-11 14:37:52,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-10-11 14:37:52,228 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 83 flow. Second operand 3 states and 62 transitions. [2024-10-11 14:37:52,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 123 flow [2024-10-11 14:37:52,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 118 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 14:37:52,233 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 72 flow [2024-10-11 14:37:52,235 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-10-11 14:37:52,238 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-10-11 14:37:52,239 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 72 flow [2024-10-11 14:37:52,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-10-11 14:37:52,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:52,239 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:52,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:37:52,239 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 14:37:52,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:52,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1716349371, now seen corresponding path program 1 times [2024-10-11 14:37:52,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:52,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332540799] [2024-10-11 14:37:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:52,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:52,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:52,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332540799] [2024-10-11 14:37:52,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332540799] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:52,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:52,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:37:52,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229360073] [2024-10-11 14:37:52,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:52,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:37:52,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:52,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:37:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:37:52,377 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-10-11 14:37:52,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-10-11 14:37:52,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:52,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-10-11 14:37:52,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:52,622 INFO L124 PetriNetUnfolderBase]: 482/877 cut-off events. [2024-10-11 14:37:52,622 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:37:52,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1641 conditions, 877 events. 482/877 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3789 event pairs, 163 based on Foata normal form. 13/818 useless extension candidates. Maximal degree in co-relation 1635. Up to 425 conditions per place. [2024-10-11 14:37:52,630 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 36 selfloop transitions, 3 changer transitions 2/50 dead transitions. [2024-10-11 14:37:52,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 191 flow [2024-10-11 14:37:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:37:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:37:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-10-11 14:37:52,633 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-10-11 14:37:52,633 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 72 flow. Second operand 3 states and 81 transitions. [2024-10-11 14:37:52,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 191 flow [2024-10-11 14:37:52,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:37:52,635 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 86 flow [2024-10-11 14:37:52,636 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-10-11 14:37:52,637 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2024-10-11 14:37:52,639 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 86 flow [2024-10-11 14:37:52,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-10-11 14:37:52,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:52,640 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:52,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:37:52,641 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 14:37:52,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:52,643 INFO L85 PathProgramCache]: Analyzing trace with hash 676605252, now seen corresponding path program 1 times [2024-10-11 14:37:52,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:52,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928995878] [2024-10-11 14:37:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:52,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:52,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928995878] [2024-10-11 14:37:52,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928995878] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:52,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:52,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:37:52,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998486672] [2024-10-11 14:37:52,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:52,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:37:52,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:52,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:37:52,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:37:52,811 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-10-11 14:37:52,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-10-11 14:37:52,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:52,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-10-11 14:37:52,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:52,939 INFO L124 PetriNetUnfolderBase]: 305/617 cut-off events. [2024-10-11 14:37:52,940 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-11 14:37:52,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 617 events. 305/617 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2648 event pairs, 81 based on Foata normal form. 28/612 useless extension candidates. Maximal degree in co-relation 1173. Up to 295 conditions per place. [2024-10-11 14:37:52,944 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 30 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2024-10-11 14:37:52,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 179 flow [2024-10-11 14:37:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:37:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:37:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-10-11 14:37:52,947 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-10-11 14:37:52,948 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 3 states and 75 transitions. [2024-10-11 14:37:52,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 179 flow [2024-10-11 14:37:52,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:37:52,950 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 91 flow [2024-10-11 14:37:52,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-10-11 14:37:52,954 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2024-10-11 14:37:52,954 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 91 flow [2024-10-11 14:37:52,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-10-11 14:37:52,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:52,954 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:52,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:37:52,955 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 14:37:52,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1700765947, now seen corresponding path program 1 times [2024-10-11 14:37:52,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:52,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512600452] [2024-10-11 14:37:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:52,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:53,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:53,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512600452] [2024-10-11 14:37:53,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512600452] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:53,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:53,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:37:53,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706928721] [2024-10-11 14:37:53,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:53,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:37:53,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:53,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:37:53,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:37:53,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-11 14:37:53,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-10-11 14:37:53,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:53,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-11 14:37:53,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:53,280 INFO L124 PetriNetUnfolderBase]: 355/713 cut-off events. [2024-10-11 14:37:53,281 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-10-11 14:37:53,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1453 conditions, 713 events. 355/713 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3011 event pairs, 124 based on Foata normal form. 0/673 useless extension candidates. Maximal degree in co-relation 1445. Up to 402 conditions per place. [2024-10-11 14:37:53,285 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 35 selfloop transitions, 2 changer transitions 3/49 dead transitions. [2024-10-11 14:37:53,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 212 flow [2024-10-11 14:37:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:37:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:37:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-10-11 14:37:53,287 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-10-11 14:37:53,287 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 91 flow. Second operand 3 states and 76 transitions. [2024-10-11 14:37:53,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 212 flow [2024-10-11 14:37:53,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:37:53,289 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 99 flow [2024-10-11 14:37:53,290 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-10-11 14:37:53,291 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2024-10-11 14:37:53,291 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 99 flow [2024-10-11 14:37:53,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-10-11 14:37:53,291 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:53,292 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:53,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:37:53,292 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 14:37:53,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:53,293 INFO L85 PathProgramCache]: Analyzing trace with hash -122785604, now seen corresponding path program 1 times [2024-10-11 14:37:53,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:53,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366684140] [2024-10-11 14:37:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:53,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 14:37:53,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180541979] [2024-10-11 14:37:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:53,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:53,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:37:53,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:37:53,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:37:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:53,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 14:37:53,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:37:53,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-10-11 14:37:53,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-11 14:37:53,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-11 14:37:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:54,008 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:37:54,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:54,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366684140] [2024-10-11 14:37:54,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 14:37:54,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180541979] [2024-10-11 14:37:54,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180541979] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:54,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:54,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:37:54,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159369622] [2024-10-11 14:37:54,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:54,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:37:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:37:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:37:54,055 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-11 14:37:54,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 99 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-11 14:37:54,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:54,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-11 14:37:54,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:54,429 INFO L124 PetriNetUnfolderBase]: 479/977 cut-off events. [2024-10-11 14:37:54,429 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-10-11 14:37:54,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2001 conditions, 977 events. 479/977 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4766 event pairs, 127 based on Foata normal form. 29/967 useless extension candidates. Maximal degree in co-relation 1990. Up to 434 conditions per place. [2024-10-11 14:37:54,434 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 60 selfloop transitions, 12 changer transitions 7/88 dead transitions. [2024-10-11 14:37:54,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 88 transitions, 396 flow [2024-10-11 14:37:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:37:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:37:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-10-11 14:37:54,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-10-11 14:37:54,438 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 99 flow. Second operand 8 states and 179 transitions. [2024-10-11 14:37:54,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 88 transitions, 396 flow [2024-10-11 14:37:54,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 88 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:37:54,440 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 185 flow [2024-10-11 14:37:54,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-10-11 14:37:54,443 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2024-10-11 14:37:54,443 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 185 flow [2024-10-11 14:37:54,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-11 14:37:54,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:54,444 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:54,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 14:37:54,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:54,645 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 14:37:54,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash -692875522, now seen corresponding path program 2 times [2024-10-11 14:37:54,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:54,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892383066] [2024-10-11 14:37:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 14:37:54,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36600764] [2024-10-11 14:37:54,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:37:54,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:54,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:37:54,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:37:54,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:37:54,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:37:54,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:37:54,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 14:37:54,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:37:54,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-10-11 14:37:55,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-11 14:37:55,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-11 14:37:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:55,161 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:37:55,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:55,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892383066] [2024-10-11 14:37:55,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 14:37:55,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36600764] [2024-10-11 14:37:55,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36600764] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:55,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:55,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:37:55,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992141862] [2024-10-11 14:37:55,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:55,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:37:55,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:55,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:37:55,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:37:55,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-11 14:37:55,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 185 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-11 14:37:55,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:55,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-11 14:37:55,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:55,584 INFO L124 PetriNetUnfolderBase]: 648/1361 cut-off events. [2024-10-11 14:37:55,584 INFO L125 PetriNetUnfolderBase]: For 798/798 co-relation queries the response was YES. [2024-10-11 14:37:55,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3410 conditions, 1361 events. 648/1361 cut-off events. For 798/798 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7634 event pairs, 208 based on Foata normal form. 44/1364 useless extension candidates. Maximal degree in co-relation 3393. Up to 546 conditions per place. [2024-10-11 14:37:55,593 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 67 selfloop transitions, 19 changer transitions 7/102 dead transitions. [2024-10-11 14:37:55,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 102 transitions, 590 flow [2024-10-11 14:37:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:37:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:37:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-10-11 14:37:55,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-10-11 14:37:55,595 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 185 flow. Second operand 8 states and 182 transitions. [2024-10-11 14:37:55,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 102 transitions, 590 flow [2024-10-11 14:37:55,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 102 transitions, 572 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-11 14:37:55,601 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 340 flow [2024-10-11 14:37:55,601 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-10-11 14:37:55,602 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2024-10-11 14:37:55,602 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 340 flow [2024-10-11 14:37:55,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-11 14:37:55,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:55,603 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:55,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:37:55,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:55,804 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 14:37:55,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1395795270, now seen corresponding path program 3 times [2024-10-11 14:37:55,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:55,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832510545] [2024-10-11 14:37:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:55,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 14:37:55,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807401662] [2024-10-11 14:37:55,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:37:55,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:55,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:37:55,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:37:55,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:37:55,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-11 14:37:55,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:37:55,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 14:37:55,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:37:56,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-10-11 14:37:56,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-11 14:37:56,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-11 14:37:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:56,293 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:37:56,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:56,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832510545] [2024-10-11 14:37:56,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 14:37:56,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807401662] [2024-10-11 14:37:56,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807401662] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:56,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:56,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:37:56,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344167361] [2024-10-11 14:37:56,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:56,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:37:56,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:56,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:37:56,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:37:56,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-11 14:37:56,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-11 14:37:56,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:56,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-11 14:37:56,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:56,748 INFO L124 PetriNetUnfolderBase]: 712/1489 cut-off events. [2024-10-11 14:37:56,749 INFO L125 PetriNetUnfolderBase]: For 2376/2380 co-relation queries the response was YES. [2024-10-11 14:37:56,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4357 conditions, 1489 events. 712/1489 cut-off events. For 2376/2380 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8598 event pairs, 215 based on Foata normal form. 15/1456 useless extension candidates. Maximal degree in co-relation 4334. Up to 654 conditions per place. [2024-10-11 14:37:56,759 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 75 selfloop transitions, 21 changer transitions 4/109 dead transitions. [2024-10-11 14:37:56,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 758 flow [2024-10-11 14:37:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:37:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:37:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-10-11 14:37:56,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-10-11 14:37:56,762 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 340 flow. Second operand 8 states and 181 transitions. [2024-10-11 14:37:56,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 758 flow [2024-10-11 14:37:56,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 730 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-10-11 14:37:56,774 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 467 flow [2024-10-11 14:37:56,774 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=467, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-10-11 14:37:56,775 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2024-10-11 14:37:56,775 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 467 flow [2024-10-11 14:37:56,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-11 14:37:56,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:56,776 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:56,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 14:37:56,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:56,980 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 14:37:56,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 222873550, now seen corresponding path program 4 times [2024-10-11 14:37:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149058343] [2024-10-11 14:37:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:56,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 14:37:57,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893752740] [2024-10-11 14:37:57,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:37:57,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:57,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:37:57,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:37:57,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:37:57,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:37:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:37:57,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 14:37:57,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:37:57,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-10-11 14:37:57,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-11 14:37:57,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-11 14:37:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:57,394 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:37:57,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:57,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149058343] [2024-10-11 14:37:57,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 14:37:57,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893752740] [2024-10-11 14:37:57,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893752740] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:57,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:57,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:37:57,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157466132] [2024-10-11 14:37:57,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:57,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:37:57,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:37:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:37:57,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-11 14:37:57,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-11 14:37:57,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:57,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-11 14:37:57,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:57,904 INFO L124 PetriNetUnfolderBase]: 874/1861 cut-off events. [2024-10-11 14:37:57,904 INFO L125 PetriNetUnfolderBase]: For 3687/3695 co-relation queries the response was YES. [2024-10-11 14:37:57,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5679 conditions, 1861 events. 874/1861 cut-off events. For 3687/3695 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11311 event pairs, 162 based on Foata normal form. 15/1824 useless extension candidates. Maximal degree in co-relation 5651. Up to 506 conditions per place. [2024-10-11 14:37:57,918 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 85 selfloop transitions, 28 changer transitions 7/129 dead transitions. [2024-10-11 14:37:57,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 993 flow [2024-10-11 14:37:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:37:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:37:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-10-11 14:37:57,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-10-11 14:37:57,920 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 467 flow. Second operand 8 states and 193 transitions. [2024-10-11 14:37:57,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 993 flow [2024-10-11 14:37:57,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 129 transitions, 954 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-10-11 14:37:57,937 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 584 flow [2024-10-11 14:37:57,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=584, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2024-10-11 14:37:57,940 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2024-10-11 14:37:57,940 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 584 flow [2024-10-11 14:37:57,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-11 14:37:57,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:57,940 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:57,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:37:58,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 14:37:58,145 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 14:37:58,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash -773277552, now seen corresponding path program 1 times [2024-10-11 14:37:58,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:58,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139363991] [2024-10-11 14:37:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:58,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:58,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139363991] [2024-10-11 14:37:58,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139363991] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:58,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:58,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:37:58,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039542050] [2024-10-11 14:37:58,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:58,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:37:58,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:58,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:37:58,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:37:58,190 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-11 14:37:58,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 584 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-10-11 14:37:58,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:58,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-11 14:37:58,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:58,444 INFO L124 PetriNetUnfolderBase]: 816/1722 cut-off events. [2024-10-11 14:37:58,444 INFO L125 PetriNetUnfolderBase]: For 4738/4738 co-relation queries the response was YES. [2024-10-11 14:37:58,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 1722 events. 816/1722 cut-off events. For 4738/4738 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9888 event pairs, 204 based on Foata normal form. 52/1735 useless extension candidates. Maximal degree in co-relation 5475. Up to 1076 conditions per place. [2024-10-11 14:37:58,455 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 65 selfloop transitions, 2 changer transitions 12/87 dead transitions. [2024-10-11 14:37:58,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 87 transitions, 791 flow [2024-10-11 14:37:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:37:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:37:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-10-11 14:37:58,456 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-10-11 14:37:58,457 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 584 flow. Second operand 3 states and 75 transitions. [2024-10-11 14:37:58,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 87 transitions, 791 flow [2024-10-11 14:37:58,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 713 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-10-11 14:37:58,468 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 423 flow [2024-10-11 14:37:58,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2024-10-11 14:37:58,469 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2024-10-11 14:37:58,469 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 423 flow [2024-10-11 14:37:58,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-10-11 14:37:58,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:58,469 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:58,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:37:58,470 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 14:37:58,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:58,470 INFO L85 PathProgramCache]: Analyzing trace with hash -228914962, now seen corresponding path program 1 times [2024-10-11 14:37:58,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:58,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498787405] [2024-10-11 14:37:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:58,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 14:37:58,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216906429] [2024-10-11 14:37:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:58,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:58,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:37:58,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:37:58,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:37:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:37:58,726 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:37:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:37:58,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:37:58,821 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:37:58,823 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-10-11 14:37:58,824 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-10-11 14:37:58,824 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-10-11 14:37:58,825 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-10-11 14:37:58,825 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-11 14:37:58,825 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-11 14:37:58,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:37:59,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:37:59,029 INFO L407 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:59,095 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-10-11 14:37:59,095 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-11 14:37:59,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:37:59 BasicIcfg [2024-10-11 14:37:59,101 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-11 14:37:59,101 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-11 14:37:59,101 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-11 14:37:59,101 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-11 14:37:59,102 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:37:51" (3/4) ... [2024-10-11 14:37:59,102 INFO L133 WitnessPrinter]: Generating witness for reachability counterexample [2024-10-11 14:37:59,164 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-11 14:37:59,164 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-11 14:37:59,165 INFO L158 Benchmark]: Toolchain (without parser) took 9488.85ms. Allocated memory was 172.0MB in the beginning and 287.3MB in the end (delta: 115.3MB). Free memory was 102.3MB in the beginning and 143.9MB in the end (delta: -41.7MB). Peak memory consumption was 74.3MB. Max. memory is 16.1GB. [2024-10-11 14:37:59,165 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 14:37:59,165 INFO L158 Benchmark]: CACSL2BoogieTranslator took 576.75ms. Allocated memory is still 172.0MB. Free memory was 102.0MB in the beginning and 79.3MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-10-11 14:37:59,166 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.36ms. Allocated memory is still 172.0MB. Free memory was 79.0MB in the beginning and 76.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 14:37:59,166 INFO L158 Benchmark]: Boogie Preprocessor took 72.93ms. Allocated memory is still 172.0MB. Free memory was 76.8MB in the beginning and 74.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 14:37:59,166 INFO L158 Benchmark]: RCFGBuilder took 794.90ms. Allocated memory is still 172.0MB. Free memory was 74.1MB in the beginning and 115.3MB in the end (delta: -41.1MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2024-10-11 14:37:59,166 INFO L158 Benchmark]: TraceAbstraction took 7922.30ms. Allocated memory was 172.0MB in the beginning and 287.3MB in the end (delta: 115.3MB). Free memory was 114.0MB in the beginning and 151.3MB in the end (delta: -37.3MB). Peak memory consumption was 77.8MB. Max. memory is 16.1GB. [2024-10-11 14:37:59,167 INFO L158 Benchmark]: Witness Printer took 63.10ms. Allocated memory is still 287.3MB. Free memory was 151.3MB in the beginning and 143.9MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-10-11 14:37:59,168 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 576.75ms. Allocated memory is still 172.0MB. Free memory was 102.0MB in the beginning and 79.3MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.36ms. Allocated memory is still 172.0MB. Free memory was 79.0MB in the beginning and 76.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.93ms. Allocated memory is still 172.0MB. Free memory was 76.8MB in the beginning and 74.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 794.90ms. Allocated memory is still 172.0MB. Free memory was 74.1MB in the beginning and 115.3MB in the end (delta: -41.1MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7922.30ms. Allocated memory was 172.0MB in the beginning and 287.3MB in the end (delta: 115.3MB). Free memory was 114.0MB in the beginning and 151.3MB in the end (delta: -37.3MB). Peak memory consumption was 77.8MB. Max. memory is 16.1GB. * Witness Printer took 63.10ms. Allocated memory is still 287.3MB. Free memory was 151.3MB in the beginning and 143.9MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1=-1, m={4:0}, next=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1=-1, id2=0, m={4:0}, next=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L743] COND FALSE 2 !(\read(receive)) VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b [L710] 1 next = (next+1)%buffer_size VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=0, send=1] [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 63 locations, 6 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: 7.7s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 385 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 342 mSDsluCounter, 120 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 100 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1665 IncrementalHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 20 mSDtfsCounter, 1665 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=584occurred in iteration=8, InterpolantAutomatonStates: 47, 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, 0.8s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 307 NumberOfCodeBlocks, 307 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 1746 SizeOfPredicates, 40 NumberOfNonLiveVariables, 700 ConjunctsInSsa, 108 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 5/5 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 RESULT: Ultimate proved your program to be incorrect! [2024-10-11 14:37:59,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE