./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d 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-ext/09_fmaxsym.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 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 02:24:41,683 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 02:24:41,747 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 02:24:41,751 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 02:24:41,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 02:24:41,784 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 02:24:41,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 02:24:41,787 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 02:24:41,788 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 02:24:41,789 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 02:24:41,790 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 02:24:41,790 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 02:24:41,791 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 02:24:41,791 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 02:24:41,791 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 02:24:41,795 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 02:24:41,795 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 02:24:41,796 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 02:24:41,796 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 02:24:41,796 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 02:24:41,796 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 02:24:41,797 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 02:24:41,797 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 02:24:41,797 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 02:24:41,797 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 02:24:41,798 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 02:24:41,798 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 02:24:41,798 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 02:24:41,798 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 02:24:41,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 02:24:41,799 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 02:24:41,799 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 02:24:41,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:24:41,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 02:24:41,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 02:24:41,800 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 02:24:41,800 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 02:24:41,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 02:24:41,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 02:24:41,803 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 02:24:41,803 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 02:24:41,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 02:24:41,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 [2024-11-09 02:24:42,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 02:24:42,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 02:24:42,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 02:24:42,129 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 02:24:42,129 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 02:24:42,131 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-11-09 02:24:43,601 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 02:24:43,872 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 02:24:43,873 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-11-09 02:24:43,885 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0affdc736/de181db7e25d4c4d9de774064d2cf375/FLAGf9db33a9a [2024-11-09 02:24:43,898 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0affdc736/de181db7e25d4c4d9de774064d2cf375 [2024-11-09 02:24:43,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 02:24:43,902 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 02:24:43,904 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 02:24:43,904 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 02:24:43,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 02:24:43,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:24:43" (1/1) ... [2024-11-09 02:24:43,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e515a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:43, skipping insertion in model container [2024-11-09 02:24:43,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:24:43" (1/1) ... [2024-11-09 02:24:43,966 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 02:24:44,324 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-ext/09_fmaxsym.i[30746,30759] [2024-11-09 02:24:44,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:24:44,361 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 02:24:44,402 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-ext/09_fmaxsym.i[30746,30759] [2024-11-09 02:24:44,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:24:44,455 INFO L204 MainTranslator]: Completed translation [2024-11-09 02:24:44,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44 WrapperNode [2024-11-09 02:24:44,456 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 02:24:44,457 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 02:24:44,458 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 02:24:44,458 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 02:24:44,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,482 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,509 INFO L138 Inliner]: procedures = 164, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2024-11-09 02:24:44,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 02:24:44,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 02:24:44,512 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 02:24:44,512 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 02:24:44,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,526 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,555 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2024-11-09 02:24:44,556 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,556 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,570 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,576 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,579 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 02:24:44,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 02:24:44,584 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 02:24:44,584 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 02:24:44,585 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (1/1) ... [2024-11-09 02:24:44,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:24:44,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:24:44,625 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) [2024-11-09 02:24:44,628 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 [2024-11-09 02:24:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 02:24:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 02:24:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 02:24:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-09 02:24:44,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-09 02:24:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 02:24:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 02:24:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 02:24:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-09 02:24:44,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 02:24:44,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 02:24:44,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 02:24:44,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 02:24:44,687 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-09 02:24:44,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 02:24:44,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 02:24:44,688 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 02:24:44,844 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 02:24:44,846 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 02:24:45,004 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 02:24:45,005 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 02:24:45,158 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 02:24:45,158 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 02:24:45,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:24:45 BoogieIcfgContainer [2024-11-09 02:24:45,159 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 02:24:45,164 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 02:24:45,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 02:24:45,168 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 02:24:45,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:24:43" (1/3) ... [2024-11-09 02:24:45,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40aed7b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:24:45, skipping insertion in model container [2024-11-09 02:24:45,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:24:44" (2/3) ... [2024-11-09 02:24:45,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40aed7b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:24:45, skipping insertion in model container [2024-11-09 02:24:45,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:24:45" (3/3) ... [2024-11-09 02:24:45,170 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2024-11-09 02:24:45,183 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 02:24:45,184 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 02:24:45,184 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 02:24:45,221 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 02:24:45,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 23 transitions, 50 flow [2024-11-09 02:24:45,288 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2024-11-09 02:24:45,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 02:24:45,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 25 events. 3/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-11-09 02:24:45,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 23 transitions, 50 flow [2024-11-09 02:24:45,294 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 23 transitions, 50 flow [2024-11-09 02:24:45,304 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:24:45,311 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;@141454f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:24:45,311 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-09 02:24:45,317 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:24:45,317 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2024-11-09 02:24:45,317 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 02:24:45,318 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:45,318 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-09 02:24:45,319 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 02:24:45,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:45,324 INFO L85 PathProgramCache]: Analyzing trace with hash -531527673, now seen corresponding path program 1 times [2024-11-09 02:24:45,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:45,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434489059] [2024-11-09 02:24:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:45,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:24:45,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:45,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434489059] [2024-11-09 02:24:45,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434489059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:24:45,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:24:45,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:24:45,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166476687] [2024-11-09 02:24:45,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:24:45,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:24:45,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:45,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:24:45,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:24:45,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-11-09 02:24:45,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-11-09 02:24:45,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:45,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-11-09 02:24:45,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:45,725 INFO L124 PetriNetUnfolderBase]: 20/67 cut-off events. [2024-11-09 02:24:45,726 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 02:24:45,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 67 events. 20/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 16 based on Foata normal form. 3/63 useless extension candidates. Maximal degree in co-relation 105. Up to 51 conditions per place. [2024-11-09 02:24:45,730 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 14 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-11-09 02:24:45,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 80 flow [2024-11-09 02:24:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:24:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:24:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-11-09 02:24:45,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-11-09 02:24:45,746 INFO L175 Difference]: Start difference. First operand has 23 places, 23 transitions, 50 flow. Second operand 3 states and 37 transitions. [2024-11-09 02:24:45,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 80 flow [2024-11-09 02:24:45,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 02:24:45,752 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 58 flow [2024-11-09 02:24:45,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-11-09 02:24:45,759 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-09 02:24:45,759 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 58 flow [2024-11-09 02:24:45,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-11-09 02:24:45,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:45,760 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:45,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 02:24:45,761 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 02:24:45,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash 211174233, now seen corresponding path program 1 times [2024-11-09 02:24:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:45,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589970805] [2024-11-09 02:24:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:24:45,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:45,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589970805] [2024-11-09 02:24:45,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589970805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:24:45,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163575851] [2024-11-09 02:24:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:45,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:24:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:24:45,887 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) [2024-11-09 02:24:45,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 02:24:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:45,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 02:24:45,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:24:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:24:46,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:24:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:24:46,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163575851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:24:46,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:24:46,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 02:24:46,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303476643] [2024-11-09 02:24:46,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:24:46,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 02:24:46,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:46,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 02:24:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 02:24:46,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-11-09 02:24:46,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 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) [2024-11-09 02:24:46,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:46,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-11-09 02:24:46,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:46,155 INFO L124 PetriNetUnfolderBase]: 20/70 cut-off events. [2024-11-09 02:24:46,155 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 02:24:46,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 70 events. 20/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 16 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 127. Up to 51 conditions per place. [2024-11-09 02:24:46,156 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 14 selfloop transitions, 5 changer transitions 0/25 dead transitions. [2024-11-09 02:24:46,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 108 flow [2024-11-09 02:24:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 02:24:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 02:24:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-11-09 02:24:46,158 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2024-11-09 02:24:46,158 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 58 flow. Second operand 6 states and 58 transitions. [2024-11-09 02:24:46,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 108 flow [2024-11-09 02:24:46,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 104 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 02:24:46,160 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 90 flow [2024-11-09 02:24:46,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2024-11-09 02:24:46,161 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2024-11-09 02:24:46,161 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 90 flow [2024-11-09 02:24:46,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 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) [2024-11-09 02:24:46,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:46,162 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-11-09 02:24:46,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 02:24:46,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:24:46,363 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 02:24:46,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:46,364 INFO L85 PathProgramCache]: Analyzing trace with hash 693030023, now seen corresponding path program 2 times [2024-11-09 02:24:46,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:46,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8283452] [2024-11-09 02:24:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:46,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:24:46,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8283452] [2024-11-09 02:24:46,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8283452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:24:46,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91085080] [2024-11-09 02:24:46,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:24:46,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:24:46,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:24:46,555 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) [2024-11-09 02:24:46,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 02:24:46,656 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:24:46,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:24:46,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 02:24:46,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:24:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:24:46,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:24:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:24:46,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91085080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:24:46,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:24:46,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-09 02:24:46,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623318974] [2024-11-09 02:24:46,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:24:46,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 02:24:46,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 02:24:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-09 02:24:46,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-11-09 02:24:46,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 90 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 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) [2024-11-09 02:24:46,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:46,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-11-09 02:24:46,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:46,797 INFO L124 PetriNetUnfolderBase]: 20/72 cut-off events. [2024-11-09 02:24:46,798 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-09 02:24:46,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 72 events. 20/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 16 based on Foata normal form. 2/68 useless extension candidates. Maximal degree in co-relation 118. Up to 51 conditions per place. [2024-11-09 02:24:46,799 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 14 selfloop transitions, 7 changer transitions 0/27 dead transitions. [2024-11-09 02:24:46,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 27 transitions, 144 flow [2024-11-09 02:24:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 02:24:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 02:24:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2024-11-09 02:24:46,801 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3858695652173913 [2024-11-09 02:24:46,801 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 90 flow. Second operand 8 states and 71 transitions. [2024-11-09 02:24:46,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 27 transitions, 144 flow [2024-11-09 02:24:46,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 27 transitions, 130 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-09 02:24:46,805 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 112 flow [2024-11-09 02:24:46,805 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2024-11-09 02:24:46,806 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 17 predicate places. [2024-11-09 02:24:46,806 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 112 flow [2024-11-09 02:24:46,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 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) [2024-11-09 02:24:46,807 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:46,807 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-11-09 02:24:46,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 02:24:47,007 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,SelfDestructingSolverStorable2 [2024-11-09 02:24:47,008 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 02:24:47,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:47,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1739003591, now seen corresponding path program 3 times [2024-11-09 02:24:47,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:47,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111936982] [2024-11-09 02:24:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:47,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:24:47,037 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 02:24:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:24:47,093 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 02:24:47,093 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 02:24:47,094 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-09 02:24:47,097 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-09 02:24:47,098 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-09 02:24:47,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 02:24:47,098 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-11-09 02:24:47,101 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 02:24:47,101 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-09 02:24:47,127 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 02:24:47,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 39 transitions, 88 flow [2024-11-09 02:24:47,142 INFO L124 PetriNetUnfolderBase]: 5/44 cut-off events. [2024-11-09 02:24:47,143 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:24:47,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 44 events. 5/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-11-09 02:24:47,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 39 transitions, 88 flow [2024-11-09 02:24:47,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 39 transitions, 88 flow [2024-11-09 02:24:47,147 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:24:47,149 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;@141454f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:24:47,149 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-09 02:24:47,156 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:24:47,156 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-11-09 02:24:47,156 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:24:47,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:47,157 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-11-09 02:24:47,157 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-09 02:24:47,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1043353845, now seen corresponding path program 1 times [2024-11-09 02:24:47,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:47,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022190520] [2024-11-09 02:24:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:47,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 02:24:47,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:47,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022190520] [2024-11-09 02:24:47,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022190520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:24:47,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:24:47,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:24:47,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890412756] [2024-11-09 02:24:47,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:24:47,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:24:47,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:24:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:24:47,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-11-09 02:24:47,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-11-09 02:24:47,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:47,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-11-09 02:24:47,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:47,364 INFO L124 PetriNetUnfolderBase]: 434/922 cut-off events. [2024-11-09 02:24:47,366 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-09 02:24:47,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1663 conditions, 922 events. 434/922 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4770 event pairs, 376 based on Foata normal form. 51/864 useless extension candidates. Maximal degree in co-relation 1014. Up to 708 conditions per place. [2024-11-09 02:24:47,376 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 24 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-09 02:24:47,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 136 flow [2024-11-09 02:24:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:24:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:24:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-11-09 02:24:47,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-11-09 02:24:47,379 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 88 flow. Second operand 3 states and 63 transitions. [2024-11-09 02:24:47,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 136 flow [2024-11-09 02:24:47,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 02:24:47,383 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 94 flow [2024-11-09 02:24:47,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-11-09 02:24:47,384 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2024-11-09 02:24:47,385 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 94 flow [2024-11-09 02:24:47,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-11-09 02:24:47,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:47,385 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:47,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 02:24:47,386 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-09 02:24:47,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:47,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2137667530, now seen corresponding path program 1 times [2024-11-09 02:24:47,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:47,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090592429] [2024-11-09 02:24:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:47,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 02:24:47,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090592429] [2024-11-09 02:24:47,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090592429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:24:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59786117] [2024-11-09 02:24:47,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:47,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:24:47,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:24:47,439 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) [2024-11-09 02:24:47,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 02:24:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:47,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 02:24:47,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:24:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 02:24:47,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:24:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 02:24:47,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59786117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:24:47,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:24:47,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 02:24:47,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108862228] [2024-11-09 02:24:47,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:24:47,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 02:24:47,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:47,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 02:24:47,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 02:24:47,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-11-09 02:24:47,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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) [2024-11-09 02:24:47,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:47,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-11-09 02:24:47,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:47,761 INFO L124 PetriNetUnfolderBase]: 434/925 cut-off events. [2024-11-09 02:24:47,762 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-09 02:24:47,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 925 events. 434/925 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4770 event pairs, 376 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 1666. Up to 708 conditions per place. [2024-11-09 02:24:47,770 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 24 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2024-11-09 02:24:47,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 164 flow [2024-11-09 02:24:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 02:24:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 02:24:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-11-09 02:24:47,772 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-11-09 02:24:47,774 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 94 flow. Second operand 6 states and 98 transitions. [2024-11-09 02:24:47,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 164 flow [2024-11-09 02:24:47,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 160 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 02:24:47,775 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 126 flow [2024-11-09 02:24:47,776 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-11-09 02:24:47,777 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2024-11-09 02:24:47,778 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 126 flow [2024-11-09 02:24:47,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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) [2024-11-09 02:24:47,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:47,778 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-11-09 02:24:47,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 02:24:47,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:24:47,983 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-09 02:24:47,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1327636939, now seen corresponding path program 2 times [2024-11-09 02:24:47,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:47,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994338950] [2024-11-09 02:24:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:47,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 02:24:48,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:48,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994338950] [2024-11-09 02:24:48,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994338950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:24:48,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909414624] [2024-11-09 02:24:48,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:24:48,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:24:48,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:24:48,095 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) [2024-11-09 02:24:48,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 02:24:48,177 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:24:48,177 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:24:48,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 02:24:48,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:24:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 02:24:48,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:24:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 02:24:48,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909414624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:24:48,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:24:48,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-09 02:24:48,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425022000] [2024-11-09 02:24:48,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:24:48,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 02:24:48,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:48,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 02:24:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-09 02:24:48,245 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-11-09 02:24:48,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 126 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 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) [2024-11-09 02:24:48,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:48,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-11-09 02:24:48,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:48,402 INFO L124 PetriNetUnfolderBase]: 434/927 cut-off events. [2024-11-09 02:24:48,402 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-09 02:24:48,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1700 conditions, 927 events. 434/927 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4768 event pairs, 376 based on Foata normal form. 2/821 useless extension candidates. Maximal degree in co-relation 1657. Up to 708 conditions per place. [2024-11-09 02:24:48,425 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 24 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-11-09 02:24:48,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 42 transitions, 200 flow [2024-11-09 02:24:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 02:24:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 02:24:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-11-09 02:24:48,430 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38782051282051283 [2024-11-09 02:24:48,430 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 126 flow. Second operand 8 states and 121 transitions. [2024-11-09 02:24:48,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 42 transitions, 200 flow [2024-11-09 02:24:48,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 186 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-09 02:24:48,432 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 148 flow [2024-11-09 02:24:48,435 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=148, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2024-11-09 02:24:48,436 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2024-11-09 02:24:48,436 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 148 flow [2024-11-09 02:24:48,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 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) [2024-11-09 02:24:48,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:48,437 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-11-09 02:24:48,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 02:24:48,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:24:48,637 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-09 02:24:48,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:48,638 INFO L85 PathProgramCache]: Analyzing trace with hash -487823147, now seen corresponding path program 3 times [2024-11-09 02:24:48,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:48,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092559225] [2024-11-09 02:24:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:48,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:24:48,665 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 02:24:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:24:48,685 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 02:24:48,686 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 02:24:48,686 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-09 02:24:48,686 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-09 02:24:48,686 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-09 02:24:48,686 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-09 02:24:48,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 02:24:48,687 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-11-09 02:24:48,687 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 02:24:48,687 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-09 02:24:48,713 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 02:24:48,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 55 transitions, 128 flow [2024-11-09 02:24:48,722 INFO L124 PetriNetUnfolderBase]: 7/63 cut-off events. [2024-11-09 02:24:48,723 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-09 02:24:48,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 63 events. 7/63 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 143 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2024-11-09 02:24:48,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 55 transitions, 128 flow [2024-11-09 02:24:48,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 55 transitions, 128 flow [2024-11-09 02:24:48,725 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:24:48,726 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;@141454f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:24:48,726 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-09 02:24:48,729 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:24:48,729 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2024-11-09 02:24:48,729 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-09 02:24:48,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:48,730 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:48,730 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-09 02:24:48,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1422539676, now seen corresponding path program 1 times [2024-11-09 02:24:48,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:48,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060081563] [2024-11-09 02:24:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:48,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 02:24:48,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:48,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060081563] [2024-11-09 02:24:48,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060081563] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:24:48,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:24:48,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:24:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959574113] [2024-11-09 02:24:48,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:24:48,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:24:48,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:24:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:24:48,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-11-09 02:24:48,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 128 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) [2024-11-09 02:24:48,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:48,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-11-09 02:24:48,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:49,784 INFO L124 PetriNetUnfolderBase]: 6347/10809 cut-off events. [2024-11-09 02:24:49,784 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2024-11-09 02:24:49,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19975 conditions, 10809 events. 6347/10809 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 74953 event pairs, 5560 based on Foata normal form. 713/10235 useless extension candidates. Maximal degree in co-relation 1663. Up to 8808 conditions per place. [2024-11-09 02:24:49,855 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 34 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-11-09 02:24:49,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 194 flow [2024-11-09 02:24:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:24:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:24:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-09 02:24:49,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5393939393939394 [2024-11-09 02:24:49,858 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 128 flow. Second operand 3 states and 89 transitions. [2024-11-09 02:24:49,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 194 flow [2024-11-09 02:24:49,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 52 transitions, 192 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-09 02:24:49,861 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 130 flow [2024-11-09 02:24:49,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-11-09 02:24:49,862 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-11-09 02:24:49,862 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 130 flow [2024-11-09 02:24:49,863 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) [2024-11-09 02:24:49,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:49,863 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:49,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 02:24:49,863 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-09 02:24:49,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1561247080, now seen corresponding path program 1 times [2024-11-09 02:24:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:49,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707005688] [2024-11-09 02:24:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 02:24:49,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:49,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707005688] [2024-11-09 02:24:49,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707005688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:24:49,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749381847] [2024-11-09 02:24:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:49,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:24:49,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:24:49,904 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) [2024-11-09 02:24:49,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 02:24:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:49,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 02:24:49,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:24:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 02:24:49,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:24:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 02:24:50,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749381847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:24:50,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:24:50,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 02:24:50,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734777552] [2024-11-09 02:24:50,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:24:50,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 02:24:50,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 02:24:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 02:24:50,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-11-09 02:24:50,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 130 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 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) [2024-11-09 02:24:50,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:50,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-11-09 02:24:50,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:50,997 INFO L124 PetriNetUnfolderBase]: 6347/10812 cut-off events. [2024-11-09 02:24:50,997 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-11-09 02:24:51,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19910 conditions, 10812 events. 6347/10812 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 74912 event pairs, 5560 based on Foata normal form. 0/9525 useless extension candidates. Maximal degree in co-relation 19896. Up to 8808 conditions per place. [2024-11-09 02:24:51,061 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 34 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-11-09 02:24:51,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 220 flow [2024-11-09 02:24:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 02:24:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 02:24:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-11-09 02:24:51,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-11-09 02:24:51,063 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 130 flow. Second operand 6 states and 138 transitions. [2024-11-09 02:24:51,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 220 flow [2024-11-09 02:24:51,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 216 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 02:24:51,068 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 162 flow [2024-11-09 02:24:51,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-11-09 02:24:51,070 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-11-09 02:24:51,071 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 162 flow [2024-11-09 02:24:51,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 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) [2024-11-09 02:24:51,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:51,071 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:51,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 02:24:51,272 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 [2024-11-09 02:24:51,272 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-09 02:24:51,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2101195108, now seen corresponding path program 2 times [2024-11-09 02:24:51,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:51,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807526813] [2024-11-09 02:24:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:51,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 02:24:51,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:51,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807526813] [2024-11-09 02:24:51,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807526813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:24:51,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290147064] [2024-11-09 02:24:51,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:24:51,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:24:51,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:24:51,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:24:51,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 02:24:51,452 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:24:51,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:24:51,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 02:24:51,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:24:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 02:24:51,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:24:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 02:24:51,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290147064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:24:51,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:24:51,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-09 02:24:51,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93970653] [2024-11-09 02:24:51,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:24:51,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 02:24:51,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 02:24:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-09 02:24:51,522 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-11-09 02:24:51,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 162 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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) [2024-11-09 02:24:51,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:51,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-11-09 02:24:51,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:24:52,452 INFO L124 PetriNetUnfolderBase]: 6347/10814 cut-off events. [2024-11-09 02:24:52,452 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-11-09 02:24:52,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19931 conditions, 10814 events. 6347/10814 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 74893 event pairs, 5560 based on Foata normal form. 2/9530 useless extension candidates. Maximal degree in co-relation 19887. Up to 8808 conditions per place. [2024-11-09 02:24:52,520 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 34 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-11-09 02:24:52,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 256 flow [2024-11-09 02:24:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 02:24:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 02:24:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-11-09 02:24:52,523 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3886363636363636 [2024-11-09 02:24:52,523 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 162 flow. Second operand 8 states and 171 transitions. [2024-11-09 02:24:52,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 256 flow [2024-11-09 02:24:52,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 57 transitions, 242 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-09 02:24:52,526 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 184 flow [2024-11-09 02:24:52,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-11-09 02:24:52,527 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-11-09 02:24:52,530 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 184 flow [2024-11-09 02:24:52,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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) [2024-11-09 02:24:52,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:52,530 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:52,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 02:24:52,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:24:52,733 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-09 02:24:52,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash 308688868, now seen corresponding path program 3 times [2024-11-09 02:24:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:52,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753055314] [2024-11-09 02:24:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:24:52,859 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 02:24:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:24:52,887 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 02:24:52,887 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 02:24:52,887 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-09 02:24:52,888 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-09 02:24:52,888 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-09 02:24:52,888 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-09 02:24:52,888 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-09 02:24:52,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 02:24:52,889 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-11-09 02:24:52,889 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 02:24:52,889 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-09 02:24:52,924 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 02:24:52,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 71 transitions, 170 flow [2024-11-09 02:24:52,933 INFO L124 PetriNetUnfolderBase]: 9/82 cut-off events. [2024-11-09 02:24:52,933 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-09 02:24:52,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 82 events. 9/82 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 211 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 73. Up to 5 conditions per place. [2024-11-09 02:24:52,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 71 transitions, 170 flow [2024-11-09 02:24:52,934 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 71 transitions, 170 flow [2024-11-09 02:24:52,935 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:24:52,935 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;@141454f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:24:52,936 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-09 02:24:52,939 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:24:52,940 INFO L124 PetriNetUnfolderBase]: 2/45 cut-off events. [2024-11-09 02:24:52,940 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-09 02:24:52,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:24:52,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:24:52,941 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-09 02:24:52,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:24:52,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1001218811, now seen corresponding path program 1 times [2024-11-09 02:24:52,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:24:52,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990319148] [2024-11-09 02:24:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:24:52,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:24:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:24:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:24:52,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:24:52,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990319148] [2024-11-09 02:24:52,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990319148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:24:52,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:24:52,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:24:52,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363635085] [2024-11-09 02:24:52,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:24:52,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:24:52,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:24:52,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:24:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:24:52,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-11-09 02:24:52,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-11-09 02:24:52,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:24:52,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-11-09 02:24:52,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:25:01,454 INFO L124 PetriNetUnfolderBase]: 79247/119475 cut-off events. [2024-11-09 02:25:01,455 INFO L125 PetriNetUnfolderBase]: For 9589/9589 co-relation queries the response was YES. [2024-11-09 02:25:01,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224870 conditions, 119475 events. 79247/119475 cut-off events. For 9589/9589 co-relation queries the response was YES. Maximal size of possible extension queue 3779. Compared 957964 event pairs, 69712 based on Foata normal form. 8858/114257 useless extension candidates. Maximal degree in co-relation 20055. Up to 101391 conditions per place. [2024-11-09 02:25:02,153 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 44 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-11-09 02:25:02,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 254 flow [2024-11-09 02:25:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:25:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:25:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-11-09 02:25:02,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.539906103286385 [2024-11-09 02:25:02,155 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 170 flow. Second operand 3 states and 115 transitions. [2024-11-09 02:25:02,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 254 flow [2024-11-09 02:25:02,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 248 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-09 02:25:02,163 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 166 flow [2024-11-09 02:25:02,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-11-09 02:25:02,168 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-09 02:25:02,168 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 166 flow [2024-11-09 02:25:02,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-11-09 02:25:02,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:25:02,169 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:25:02,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 02:25:02,169 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-09 02:25:02,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:25:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash 658252622, now seen corresponding path program 1 times [2024-11-09 02:25:02,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:25:02,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600755092] [2024-11-09 02:25:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:25:02,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:25:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:25:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:25:02,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:25:02,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600755092] [2024-11-09 02:25:02,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600755092] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:25:02,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35894917] [2024-11-09 02:25:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:25:02,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:25:02,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:25:02,214 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:25:02,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 02:25:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:25:02,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 02:25:02,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:25:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:25:02,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:25:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:25:02,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35894917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:25:02,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:25:02,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 02:25:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794233687] [2024-11-09 02:25:02,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:25:02,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 02:25:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:25:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 02:25:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 02:25:02,338 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-11-09 02:25:02,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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) [2024-11-09 02:25:02,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:25:02,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-11-09 02:25:02,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:25:10,577 INFO L124 PetriNetUnfolderBase]: 79247/119478 cut-off events. [2024-11-09 02:25:10,578 INFO L125 PetriNetUnfolderBase]: For 4319/4319 co-relation queries the response was YES. [2024-11-09 02:25:10,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223347 conditions, 119478 events. 79247/119478 cut-off events. For 4319/4319 co-relation queries the response was YES. Maximal size of possible extension queue 3779. Compared 957923 event pairs, 69712 based on Foata normal form. 0/105402 useless extension candidates. Maximal degree in co-relation 223332. Up to 101391 conditions per place. [2024-11-09 02:25:11,388 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 44 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2024-11-09 02:25:11,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 276 flow [2024-11-09 02:25:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 02:25:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 02:25:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-11-09 02:25:11,389 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41784037558685444 [2024-11-09 02:25:11,389 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 166 flow. Second operand 6 states and 178 transitions. [2024-11-09 02:25:11,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 276 flow [2024-11-09 02:25:11,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 02:25:11,409 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 198 flow [2024-11-09 02:25:11,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2024-11-09 02:25:11,410 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-11-09 02:25:11,410 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 198 flow [2024-11-09 02:25:11,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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) [2024-11-09 02:25:11,410 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:25:11,410 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:25:11,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 02:25:11,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:25:11,611 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-09 02:25:11,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:25:11,612 INFO L85 PathProgramCache]: Analyzing trace with hash 159670203, now seen corresponding path program 2 times [2024-11-09 02:25:11,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:25:11,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293047935] [2024-11-09 02:25:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:25:11,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:25:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:25:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:25:11,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:25:11,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293047935] [2024-11-09 02:25:11,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293047935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:25:11,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105894485] [2024-11-09 02:25:11,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:25:11,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:25:11,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:25:11,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:25:11,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 02:25:11,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 02:25:11,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:25:11,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 02:25:11,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:25:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 02:25:11,828 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 02:25:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105894485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:25:11,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 02:25:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-09 02:25:11,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108794497] [2024-11-09 02:25:11,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:25:11,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:25:11,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:25:11,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:25:11,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-09 02:25:11,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 71 [2024-11-09 02:25:11,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-09 02:25:11,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:25:11,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 71 [2024-11-09 02:25:11,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:25:21,407 INFO L124 PetriNetUnfolderBase]: 99317/141309 cut-off events. [2024-11-09 02:25:21,407 INFO L125 PetriNetUnfolderBase]: For 4035/4035 co-relation queries the response was YES. [2024-11-09 02:25:21,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270727 conditions, 141309 events. 99317/141309 cut-off events. For 4035/4035 co-relation queries the response was YES. Maximal size of possible extension queue 3804. Compared 1042822 event pairs, 37636 based on Foata normal form. 0/124816 useless extension candidates. Maximal degree in co-relation 270690. Up to 67590 conditions per place. [2024-11-09 02:25:22,297 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 81 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2024-11-09 02:25:22,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 102 transitions, 445 flow [2024-11-09 02:25:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:25:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:25:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-11-09 02:25:22,299 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.647887323943662 [2024-11-09 02:25:22,299 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 198 flow. Second operand 3 states and 138 transitions. [2024-11-09 02:25:22,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 102 transitions, 445 flow [2024-11-09 02:25:22,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 102 transitions, 431 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-09 02:25:22,310 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 197 flow [2024-11-09 02:25:22,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2024-11-09 02:25:22,311 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-11-09 02:25:22,311 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 197 flow [2024-11-09 02:25:22,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-09 02:25:22,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:25:22,312 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:25:22,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 02:25:22,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 02:25:22,515 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-11-09 02:25:22,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:25:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1992933710, now seen corresponding path program 1 times [2024-11-09 02:25:22,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:25:22,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680103068] [2024-11-09 02:25:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:25:22,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:25:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:25:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 02:25:22,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:25:22,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680103068] [2024-11-09 02:25:22,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680103068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:25:22,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366205375] [2024-11-09 02:25:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:25:22,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:25:22,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:25:22,591 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:25:22,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 02:25:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:25:22,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 02:25:22,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:25:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 02:25:22,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:25:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 02:25:22,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366205375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:25:22,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:25:22,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-09 02:25:22,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96301858] [2024-11-09 02:25:22,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:25:22,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 02:25:22,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:25:22,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 02:25:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-09 02:25:22,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-11-09 02:25:22,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 197 flow. Second operand has 9 states, 9 states have (on average 22.88888888888889) internal successors, (206), 9 states have internal predecessors, (206), 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) [2024-11-09 02:25:22,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:25:22,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-11-09 02:25:22,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand