./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! 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-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:38:22,971 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:38:23,047 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:38:23,055 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:38:23,055 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:38:23,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:38:23,089 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:38:23,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:38:23,091 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:38:23,092 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:38:23,092 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:38:23,093 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:38:23,093 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:38:23,094 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:38:23,096 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:38:23,096 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:38:23,097 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:38:23,097 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:38:23,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:38:23,097 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:38:23,098 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:38:23,102 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:38:23,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:38:23,103 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:38:23,103 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:38:23,103 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:38:23,104 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:38:23,104 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:38:23,104 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:38:23,104 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:38:23,105 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:38:23,105 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:38:23,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:38:23,106 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:38:23,106 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:38:23,106 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:38:23,107 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:38:23,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:38:23,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:38:23,108 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:38:23,109 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:38:23,109 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:38:23,109 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2024-11-10 10:38:23,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:38:23,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:38:23,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:38:23,397 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:38:23,398 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:38:23,399 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2024-11-10 10:38:24,843 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:38:25,094 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:38:25,094 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2024-11-10 10:38:25,115 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ce2ef978/b86b02d298b245ae8a54a5ef8b49dc8e/FLAGe5162092d [2024-11-10 10:38:25,131 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ce2ef978/b86b02d298b245ae8a54a5ef8b49dc8e [2024-11-10 10:38:25,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:38:25,136 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:38:25,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:38:25,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:38:25,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:38:25,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5353d0d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25, skipping insertion in model container [2024-11-10 10:38:25,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,186 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:38:25,515 WARN L250 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] [2024-11-10 10:38:25,532 WARN L250 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] [2024-11-10 10:38:25,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:38:25,562 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:38:25,608 WARN L250 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] [2024-11-10 10:38:25,611 WARN L250 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] [2024-11-10 10:38:25,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:38:25,662 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:38:25,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25 WrapperNode [2024-11-10 10:38:25,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:38:25,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:38:25,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:38:25,665 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:38:25,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,689 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,720 INFO L138 Inliner]: procedures = 168, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 136 [2024-11-10 10:38:25,724 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:38:25,725 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:38:25,725 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:38:25,725 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:38:25,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,744 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,777 INFO L175 MemorySlicer]: Split 23 memory accesses to 4 slices as follows [2, 1, 12, 8]. 52 percent of accesses are in the largest equivalence class. The 21 initializations are split as follows [2, 1, 10, 8]. The 1 writes are split as follows [0, 0, 1, 0]. [2024-11-10 10:38:25,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,789 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,794 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,796 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,804 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:38:25,806 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:38:25,806 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:38:25,806 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:38:25,807 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (1/1) ... [2024-11-10 10:38:25,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:38:25,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:38:25,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 10:38:25,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 10:38:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:38:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:38:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 10:38:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-10 10:38:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-10 10:38:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-10 10:38:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-10 10:38:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-10 10:38:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:38:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:38:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 10:38:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-10 10:38:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 10:38:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:38:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-10 10:38:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-10 10:38:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-10 10:38:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-10 10:38:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:38:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:38:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 10:38:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-10 10:38:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 10:38:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:38:25,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:38:25,953 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:38:26,116 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:38:26,121 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:38:26,396 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L698: havoc removeLogElement_#t~mem2#1; [2024-11-10 10:38:26,398 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:38:26,398 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:38:26,623 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:38:26,624 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:38:26,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:38:26 BoogieIcfgContainer [2024-11-10 10:38:26,624 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:38:26,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:38:26,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:38:26,630 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:38:26,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:38:25" (1/3) ... [2024-11-10 10:38:26,631 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7602d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:38:26, skipping insertion in model container [2024-11-10 10:38:26,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:38:25" (2/3) ... [2024-11-10 10:38:26,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7602d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:38:26, skipping insertion in model container [2024-11-10 10:38:26,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:38:26" (3/3) ... [2024-11-10 10:38:26,635 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2024-11-10 10:38:26,650 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:38:26,651 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-10 10:38:26,651 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:38:26,707 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:38:26,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 47 transitions, 108 flow [2024-11-10 10:38:26,777 INFO L124 PetriNetUnfolderBase]: 9/45 cut-off events. [2024-11-10 10:38:26,778 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:38:26,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 9/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 108 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-11-10 10:38:26,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 47 transitions, 108 flow [2024-11-10 10:38:26,786 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 43 transitions, 95 flow [2024-11-10 10:38:26,797 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:38:26,805 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;@64a238bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:38:26,806 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-10 10:38:26,820 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:38:26,822 INFO L124 PetriNetUnfolderBase]: 9/41 cut-off events. [2024-11-10 10:38:26,822 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:38:26,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:26,823 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:38:26,823 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:38:26,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1978390832, now seen corresponding path program 1 times [2024-11-10 10:38:26,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:26,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498210289] [2024-11-10 10:38:26,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:26,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:38:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:27,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:38:27,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498210289] [2024-11-10 10:38:27,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498210289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:38:27,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:38:27,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:38:27,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392743018] [2024-11-10 10:38:27,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:38:27,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:38:27,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:38:27,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:38:27,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:38:27,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-11-10 10:38:27,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:27,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:38:27,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-11-10 10:38:27,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:38:27,657 INFO L124 PetriNetUnfolderBase]: 299/578 cut-off events. [2024-11-10 10:38:27,657 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-10 10:38:27,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1069 conditions, 578 events. 299/578 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2880 event pairs, 209 based on Foata normal form. 76/578 useless extension candidates. Maximal degree in co-relation 1014. Up to 461 conditions per place. [2024-11-10 10:38:27,666 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 23 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2024-11-10 10:38:27,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 37 transitions, 131 flow [2024-11-10 10:38:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:38:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:38:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-11-10 10:38:27,681 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-11-10 10:38:27,682 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 95 flow. Second operand 3 states and 76 transitions. [2024-11-10 10:38:27,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 37 transitions, 131 flow [2024-11-10 10:38:27,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 10:38:27,687 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 80 flow [2024-11-10 10:38:27,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-11-10 10:38:27,694 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-11-10 10:38:27,695 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 80 flow [2024-11-10 10:38:27,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:27,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:27,695 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:38:27,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:38:27,696 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:38:27,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:27,697 INFO L85 PathProgramCache]: Analyzing trace with hash -899591001, now seen corresponding path program 1 times [2024-11-10 10:38:27,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:27,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188044375] [2024-11-10 10:38:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:27,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:38:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:27,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:38:27,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188044375] [2024-11-10 10:38:27,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188044375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:38:27,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:38:27,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:38:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066307584] [2024-11-10 10:38:27,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:38:27,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:38:27,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:38:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:38:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:38:27,800 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-11-10 10:38:27,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:27,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:38:27,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-11-10 10:38:27,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:38:27,969 INFO L124 PetriNetUnfolderBase]: 473/938 cut-off events. [2024-11-10 10:38:27,969 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-10 10:38:27,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1690 conditions, 938 events. 473/938 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4638 event pairs, 165 based on Foata normal form. 19/853 useless extension candidates. Maximal degree in co-relation 1684. Up to 425 conditions per place. [2024-11-10 10:38:27,977 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 36 selfloop transitions, 3 changer transitions 2/54 dead transitions. [2024-11-10 10:38:27,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 199 flow [2024-11-10 10:38:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:38:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:38:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-10 10:38:27,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-11-10 10:38:27,980 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 80 flow. Second operand 3 states and 90 transitions. [2024-11-10 10:38:27,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 199 flow [2024-11-10 10:38:27,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:38:27,983 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 94 flow [2024-11-10 10:38:27,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-10 10:38:27,985 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2024-11-10 10:38:27,985 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 94 flow [2024-11-10 10:38:27,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:27,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:27,986 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] [2024-11-10 10:38:27,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:38:27,986 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:38:27,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2140187845, now seen corresponding path program 1 times [2024-11-10 10:38:27,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:27,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464515519] [2024-11-10 10:38:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:27,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:38:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:28,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:38:28,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464515519] [2024-11-10 10:38:28,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464515519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:38:28,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:38:28,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:38:28,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649974218] [2024-11-10 10:38:28,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:38:28,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:38:28,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:38:28,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:38:28,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:38:28,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-11-10 10:38:28,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:28,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:38:28,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-11-10 10:38:28,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:38:28,276 INFO L124 PetriNetUnfolderBase]: 305/666 cut-off events. [2024-11-10 10:38:28,277 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-10 10:38:28,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 666 events. 305/666 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3253 event pairs, 81 based on Foata normal form. 28/633 useless extension candidates. Maximal degree in co-relation 1222. Up to 295 conditions per place. [2024-11-10 10:38:28,281 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 30 selfloop transitions, 4 changer transitions 1/48 dead transitions. [2024-11-10 10:38:28,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 187 flow [2024-11-10 10:38:28,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:38:28,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:38:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-10 10:38:28,284 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-11-10 10:38:28,285 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 94 flow. Second operand 3 states and 84 transitions. [2024-11-10 10:38:28,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 187 flow [2024-11-10 10:38:28,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:38:28,287 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 99 flow [2024-11-10 10:38:28,287 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-11-10 10:38:28,289 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-11-10 10:38:28,289 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 99 flow [2024-11-10 10:38:28,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:28,290 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:28,290 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] [2024-11-10 10:38:28,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:38:28,290 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:38:28,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1958424341, now seen corresponding path program 1 times [2024-11-10 10:38:28,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:28,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280422072] [2024-11-10 10:38:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:28,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:38:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:28,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:38:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280422072] [2024-11-10 10:38:28,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280422072] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:38:28,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:38:28,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:38:28,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732233589] [2024-11-10 10:38:28,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:38:28,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:38:28,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:38:28,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:38:28,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:38:28,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-11-10 10:38:28,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:28,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:38:28,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-11-10 10:38:28,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:38:28,642 INFO L124 PetriNetUnfolderBase]: 355/797 cut-off events. [2024-11-10 10:38:28,642 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-10 10:38:28,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 797 events. 355/797 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3946 event pairs, 124 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 1529. Up to 402 conditions per place. [2024-11-10 10:38:28,646 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 35 selfloop transitions, 2 changer transitions 3/53 dead transitions. [2024-11-10 10:38:28,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 220 flow [2024-11-10 10:38:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:38:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:38:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-11-10 10:38:28,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-11-10 10:38:28,648 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 99 flow. Second operand 3 states and 88 transitions. [2024-11-10 10:38:28,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 220 flow [2024-11-10 10:38:28,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:38:28,651 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 107 flow [2024-11-10 10:38:28,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-11-10 10:38:28,652 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-11-10 10:38:28,652 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 107 flow [2024-11-10 10:38:28,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:28,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:28,653 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, 1, 1] [2024-11-10 10:38:28,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:38:28,653 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:38:28,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1583402668, now seen corresponding path program 1 times [2024-11-10 10:38:28,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:28,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340523701] [2024-11-10 10:38:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:28,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-10 10:38:28,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615303873] [2024-11-10 10:38:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:28,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:38:28,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:38:28,714 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:38:28,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:38:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:38:28,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 10:38:28,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:38:29,195 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 11 treesize of output 7 [2024-11-10 10:38:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:29,386 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:38:29,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:38:29,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340523701] [2024-11-10 10:38:29,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-10 10:38:29,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615303873] [2024-11-10 10:38:29,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615303873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:38:29,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:38:29,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:38:29,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758980462] [2024-11-10 10:38:29,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:38:29,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:38:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:38:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:38:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:38:29,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-11-10 10:38:29,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 107 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:29,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:38:29,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-11-10 10:38:29,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:38:29,827 INFO L124 PetriNetUnfolderBase]: 649/1337 cut-off events. [2024-11-10 10:38:29,827 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-11-10 10:38:29,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1337 events. 649/1337 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7192 event pairs, 186 based on Foata normal form. 33/1319 useless extension candidates. Maximal degree in co-relation 2665. Up to 599 conditions per place. [2024-11-10 10:38:29,834 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 62 selfloop transitions, 12 changer transitions 13/98 dead transitions. [2024-11-10 10:38:29,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 98 transitions, 432 flow [2024-11-10 10:38:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 10:38:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 10:38:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-11-10 10:38:29,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-11-10 10:38:29,836 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 107 flow. Second operand 8 states and 203 transitions. [2024-11-10 10:38:29,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 98 transitions, 432 flow [2024-11-10 10:38:29,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 98 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:38:29,842 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 191 flow [2024-11-10 10:38:29,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=191, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-11-10 10:38:29,843 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-11-10 10:38:29,843 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 191 flow [2024-11-10 10:38:29,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:29,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:29,844 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, 1, 1] [2024-11-10 10:38:29,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:38:30,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:38:30,045 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:38:30,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:30,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1483806062, now seen corresponding path program 2 times [2024-11-10 10:38:30,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:30,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095630181] [2024-11-10 10:38:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:30,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-10 10:38:30,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546861716] [2024-11-10 10:38:30,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:38:30,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:38:30,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:38:30,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:38:30,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:38:30,259 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 10:38:30,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:38:30,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 10:38:30,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:38:30,479 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 11 treesize of output 7 [2024-11-10 10:38:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:30,645 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:38:30,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:38:30,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095630181] [2024-11-10 10:38:30,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-10 10:38:30,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546861716] [2024-11-10 10:38:30,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546861716] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:38:30,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:38:30,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:38:30,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693899613] [2024-11-10 10:38:30,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:38:30,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:38:30,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:38:30,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:38:30,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:38:30,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-11-10 10:38:30,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 191 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:30,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:38:30,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-11-10 10:38:30,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:38:31,080 INFO L124 PetriNetUnfolderBase]: 745/1619 cut-off events. [2024-11-10 10:38:31,081 INFO L125 PetriNetUnfolderBase]: For 976/976 co-relation queries the response was YES. [2024-11-10 10:38:31,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3897 conditions, 1619 events. 745/1619 cut-off events. For 976/976 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9794 event pairs, 253 based on Foata normal form. 48/1623 useless extension candidates. Maximal degree in co-relation 3880. Up to 641 conditions per place. [2024-11-10 10:38:31,090 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 69 selfloop transitions, 19 changer transitions 10/109 dead transitions. [2024-11-10 10:38:31,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 109 transitions, 614 flow [2024-11-10 10:38:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 10:38:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 10:38:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-11-10 10:38:31,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-11-10 10:38:31,092 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 191 flow. Second operand 8 states and 203 transitions. [2024-11-10 10:38:31,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 109 transitions, 614 flow [2024-11-10 10:38:31,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 109 transitions, 596 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 10:38:31,100 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 346 flow [2024-11-10 10:38:31,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-11-10 10:38:31,101 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-11-10 10:38:31,102 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 346 flow [2024-11-10 10:38:31,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:31,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:31,102 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, 1, 1] [2024-11-10 10:38:31,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:38:31,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-10 10:38:31,303 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:38:31,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1156886250, now seen corresponding path program 3 times [2024-11-10 10:38:31,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:31,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116488226] [2024-11-10 10:38:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:31,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-10 10:38:31,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916510571] [2024-11-10 10:38:31,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:38:31,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:38:31,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:38:31,373 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:38:31,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:38:31,536 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-10 10:38:31,537 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:38:31,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-10 10:38:31,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:38:31,719 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 19 treesize of output 11 [2024-11-10 10:38:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:31,842 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:38:31,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:38:31,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116488226] [2024-11-10 10:38:31,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-10 10:38:31,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916510571] [2024-11-10 10:38:31,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916510571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:38:31,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:38:31,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:38:31,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850937246] [2024-11-10 10:38:31,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:38:31,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:38:31,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:38:31,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:38:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:38:31,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-11-10 10:38:31,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 346 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:31,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:38:31,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-11-10 10:38:31,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:38:32,318 INFO L124 PetriNetUnfolderBase]: 823/1773 cut-off events. [2024-11-10 10:38:32,319 INFO L125 PetriNetUnfolderBase]: For 3014/3024 co-relation queries the response was YES. [2024-11-10 10:38:32,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4962 conditions, 1773 events. 823/1773 cut-off events. For 3014/3024 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 11031 event pairs, 270 based on Foata normal form. 17/1739 useless extension candidates. Maximal degree in co-relation 4939. Up to 771 conditions per place. [2024-11-10 10:38:32,332 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 77 selfloop transitions, 21 changer transitions 6/115 dead transitions. [2024-11-10 10:38:32,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 115 transitions, 778 flow [2024-11-10 10:38:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 10:38:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 10:38:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-11-10 10:38:32,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-11-10 10:38:32,335 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 346 flow. Second operand 8 states and 201 transitions. [2024-11-10 10:38:32,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 115 transitions, 778 flow [2024-11-10 10:38:32,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 115 transitions, 750 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-11-10 10:38:32,352 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 473 flow [2024-11-10 10:38:32,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=473, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-11-10 10:38:32,353 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-11-10 10:38:32,353 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 473 flow [2024-11-10 10:38:32,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:32,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:32,353 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, 1, 1] [2024-11-10 10:38:32,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:38:32,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:38:32,558 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:38:32,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:32,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2062737878, now seen corresponding path program 4 times [2024-11-10 10:38:32,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:32,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462262905] [2024-11-10 10:38:32,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:32,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-10 10:38:32,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692418184] [2024-11-10 10:38:32,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:38:32,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:38:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:38:32,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:38:32,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:38:32,806 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:38:32,806 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:38:32,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 10:38:32,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:38:32,912 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 11 treesize of output 7 [2024-11-10 10:38:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:33,035 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:38:33,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:38:33,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462262905] [2024-11-10 10:38:33,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-10 10:38:33,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692418184] [2024-11-10 10:38:33,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692418184] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:38:33,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:38:33,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:38:33,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710548992] [2024-11-10 10:38:33,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:38:33,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:38:33,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:38:33,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:38:33,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:38:33,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-11-10 10:38:33,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 473 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:33,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:38:33,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-11-10 10:38:33,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:38:33,527 INFO L124 PetriNetUnfolderBase]: 1018/2241 cut-off events. [2024-11-10 10:38:33,527 INFO L125 PetriNetUnfolderBase]: For 4527/4539 co-relation queries the response was YES. [2024-11-10 10:38:33,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6507 conditions, 2241 events. 1018/2241 cut-off events. For 4527/4539 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 14719 event pairs, 211 based on Foata normal form. 17/2197 useless extension candidates. Maximal degree in co-relation 6479. Up to 600 conditions per place. [2024-11-10 10:38:33,543 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 88 selfloop transitions, 28 changer transitions 9/136 dead transitions. [2024-11-10 10:38:33,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 136 transitions, 1017 flow [2024-11-10 10:38:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 10:38:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 10:38:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-11-10 10:38:33,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-11-10 10:38:33,545 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 473 flow. Second operand 8 states and 214 transitions. [2024-11-10 10:38:33,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 136 transitions, 1017 flow [2024-11-10 10:38:33,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 136 transitions, 978 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-10 10:38:33,567 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 590 flow [2024-11-10 10:38:33,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=590, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2024-11-10 10:38:33,569 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-11-10 10:38:33,571 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 590 flow [2024-11-10 10:38:33,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:33,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:33,571 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:38:33,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 10:38:33,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:38:33,772 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:38:33,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1902569975, now seen corresponding path program 1 times [2024-11-10 10:38:33,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:33,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172465365] [2024-11-10 10:38:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:33,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:38:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:38:33,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172465365] [2024-11-10 10:38:33,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172465365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:38:33,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:38:33,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:38:33,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326191439] [2024-11-10 10:38:33,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:38:33,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:38:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:38:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:38:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:38:33,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-11-10 10:38:33,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 590 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:33,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:38:33,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-11-10 10:38:33,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:38:34,069 INFO L124 PetriNetUnfolderBase]: 744/1835 cut-off events. [2024-11-10 10:38:34,070 INFO L125 PetriNetUnfolderBase]: For 3438/3438 co-relation queries the response was YES. [2024-11-10 10:38:34,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5135 conditions, 1835 events. 744/1835 cut-off events. For 3438/3438 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 11842 event pairs, 192 based on Foata normal form. 50/1841 useless extension candidates. Maximal degree in co-relation 5104. Up to 1010 conditions per place. [2024-11-10 10:38:34,083 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 64 selfloop transitions, 2 changer transitions 11/89 dead transitions. [2024-11-10 10:38:34,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 775 flow [2024-11-10 10:38:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:38:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:38:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-11-10 10:38:34,085 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5815602836879432 [2024-11-10 10:38:34,085 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 590 flow. Second operand 3 states and 82 transitions. [2024-11-10 10:38:34,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 775 flow [2024-11-10 10:38:34,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 89 transitions, 697 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-11-10 10:38:34,096 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 429 flow [2024-11-10 10:38:34,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2024-11-10 10:38:34,097 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-11-10 10:38:34,097 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 429 flow [2024-11-10 10:38:34,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:38:34,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:34,098 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:38:34,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 10:38:34,098 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:38:34,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:34,099 INFO L85 PathProgramCache]: Analyzing trace with hash 980244291, now seen corresponding path program 1 times [2024-11-10 10:38:34,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:34,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453715485] [2024-11-10 10:38:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:34,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-10 10:38:34,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922361915] [2024-11-10 10:38:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:34,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:38:34,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:38:34,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:38:34,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:38:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:38:34,246 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:38:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:38:34,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:38:34,346 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:38:34,347 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-11-10 10:38:34,349 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-10 10:38:34,349 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-11-10 10:38:34,349 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-10 10:38:34,349 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-10 10:38:34,349 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-10 10:38:34,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 10:38:34,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-10 10:38:34,550 INFO L407 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2024-11-10 10:38:34,610 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-10 10:38:34,610 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-10 10:38:34,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 10:38:34 BasicIcfg [2024-11-10 10:38:34,617 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-10 10:38:34,617 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-10 10:38:34,617 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-10 10:38:34,618 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-10 10:38:34,618 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:38:26" (3/4) ... [2024-11-10 10:38:34,619 INFO L137 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-10 10:38:34,686 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-10 10:38:34,686 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-10 10:38:34,687 INFO L158 Benchmark]: Toolchain (without parser) took 9551.55ms. Allocated memory was 190.8MB in the beginning and 310.4MB in the end (delta: 119.5MB). Free memory was 116.5MB in the beginning and 266.4MB in the end (delta: -149.9MB). Peak memory consumption was 147.4MB. Max. memory is 16.1GB. [2024-11-10 10:38:34,687 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 190.8MB. Free memory is still 146.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-10 10:38:34,687 INFO L158 Benchmark]: CACSL2BoogieTranslator took 527.42ms. Allocated memory is still 190.8MB. Free memory was 116.5MB in the beginning and 92.8MB in the end (delta: 23.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-10 10:38:34,688 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.17ms. Allocated memory is still 190.8MB. Free memory was 92.8MB in the beginning and 90.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-10 10:38:34,688 INFO L158 Benchmark]: Boogie Preprocessor took 80.19ms. Allocated memory is still 190.8MB. Free memory was 90.4MB in the beginning and 87.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-10 10:38:34,688 INFO L158 Benchmark]: IcfgBuilder took 818.58ms. Allocated memory is still 190.8MB. Free memory was 87.8MB in the beginning and 119.2MB in the end (delta: -31.4MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2024-11-10 10:38:34,689 INFO L158 Benchmark]: TraceAbstraction took 7990.95ms. Allocated memory was 190.8MB in the beginning and 310.4MB in the end (delta: 119.5MB). Free memory was 118.2MB in the beginning and 92.5MB in the end (delta: 25.7MB). Peak memory consumption was 147.2MB. Max. memory is 16.1GB. [2024-11-10 10:38:34,689 INFO L158 Benchmark]: Witness Printer took 69.19ms. Allocated memory is still 310.4MB. Free memory was 92.5MB in the beginning and 266.4MB in the end (delta: -173.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-10 10:38:34,690 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 190.8MB. Free memory is still 146.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 527.42ms. Allocated memory is still 190.8MB. Free memory was 116.5MB in the beginning and 92.8MB in the end (delta: 23.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.17ms. Allocated memory is still 190.8MB. Free memory was 92.8MB in the beginning and 90.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 80.19ms. Allocated memory is still 190.8MB. Free memory was 90.4MB in the beginning and 87.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 818.58ms. Allocated memory is still 190.8MB. Free memory was 87.8MB in the beginning and 119.2MB in the end (delta: -31.4MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7990.95ms. Allocated memory was 190.8MB in the beginning and 310.4MB in the end (delta: 119.5MB). Free memory was 118.2MB in the beginning and 92.5MB in the end (delta: 25.7MB). Peak memory consumption was 147.2MB. Max. memory is 16.1GB. * Witness Printer took 69.19ms. Allocated memory is still 310.4MB. Free memory was 92.5MB in the beginning and 266.4MB in the end (delta: -173.9MB). Peak memory consumption was 2.1MB. 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]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [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] [L740] COND TRUE 2 i<7 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, 71 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: 7.8s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 405 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 360 mSDsluCounter, 200 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 158 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1612 IncrementalHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 42 mSDtfsCounter, 1612 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=590occurred 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, 338 NumberOfCodeBlocks, 338 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 1792 SizeOfPredicates, 42 NumberOfNonLiveVariables, 780 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 6/6 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! [2024-11-10 10:38:34,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with 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