./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 16:19:29,851 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 16:19:29,916 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 16:19:29,930 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 16:19:29,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 16:19:29,962 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 16:19:29,962 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 16:19:29,963 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 16:19:29,963 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 16:19:29,966 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 16:19:29,967 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 16:19:29,967 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 16:19:29,968 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 16:19:29,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 16:19:29,969 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 16:19:29,969 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 16:19:29,969 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 16:19:29,969 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 16:19:29,970 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 16:19:29,970 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 16:19:29,970 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 16:19:29,970 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 16:19:29,970 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 16:19:29,971 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 16:19:29,971 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 16:19:29,971 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 16:19:29,971 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 16:19:29,971 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 16:19:29,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 16:19:29,972 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 16:19:29,973 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 16:19:29,973 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 16:19:29,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:19:29,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 16:19:29,974 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 16:19:29,974 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 16:19:29,974 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 16:19:29,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 16:19:29,974 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 16:19:29,975 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 16:19:29,975 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 16:19:29,975 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 16:19:29,975 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 16:19:29,975 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2024-01-27 16:19:30,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 16:19:30,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 16:19:30,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 16:19:30,236 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 16:19:30,236 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 16:19:30,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2024-01-27 16:19:31,291 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 16:19:31,484 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 16:19:31,485 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2024-01-27 16:19:31,497 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64e268639/a27567632a4e469eac85c3d2a7ca67ee/FLAGdb5b6867f [2024-01-27 16:19:31,509 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64e268639/a27567632a4e469eac85c3d2a7ca67ee [2024-01-27 16:19:31,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 16:19:31,513 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 16:19:31,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 16:19:31,514 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 16:19:31,518 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 16:19:31,519 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:31,520 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d8c1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31, skipping insertion in model container [2024-01-27 16:19:31,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:31,554 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 16:19:31,802 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30440,30453] [2024-01-27 16:19:31,818 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30895,30908] [2024-01-27 16:19:31,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:19:31,848 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 16:19:31,896 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30440,30453] [2024-01-27 16:19:31,903 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30895,30908] [2024-01-27 16:19:31,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:19:31,941 INFO L206 MainTranslator]: Completed translation [2024-01-27 16:19:31,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31 WrapperNode [2024-01-27 16:19:31,942 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 16:19:31,944 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 16:19:31,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 16:19:31,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 16:19:31,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:31,961 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:31,989 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 141 [2024-01-27 16:19:31,990 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 16:19:31,990 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 16:19:31,991 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 16:19:31,991 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 16:19:31,999 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:32,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:32,015 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:32,032 INFO L175 MemorySlicer]: Split 18 memory accesses to 6 slices as follows [2, 1, 3, 8, 2, 2]. 44 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 8, 0, 0]. The 4 writes are split as follows [0, 0, 2, 0, 1, 1]. [2024-01-27 16:19:32,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:32,032 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:32,038 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:32,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:32,043 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:32,044 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:32,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 16:19:32,047 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 16:19:32,048 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 16:19:32,048 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 16:19:32,048 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (1/1) ... [2024-01-27 16:19:32,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:19:32,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:32,143 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) [2024-01-27 16:19:32,160 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 [2024-01-27 16:19:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 16:19:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 16:19:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 16:19:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 16:19:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 16:19:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-01-27 16:19:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-27 16:19:32,181 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-27 16:19:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-27 16:19:32,181 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-27 16:19:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 16:19:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 16:19:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 16:19:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 16:19:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 16:19:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-01-27 16:19:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 16:19:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 16:19:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 16:19:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 16:19:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-01-27 16:19:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-01-27 16:19:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-01-27 16:19:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-01-27 16:19:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-01-27 16:19:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-01-27 16:19:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 16:19:32,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 16:19:32,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 16:19:32,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 16:19:32,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 16:19:32,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-01-27 16:19:32,184 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 16:19:32,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 16:19:32,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 16:19:32,186 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 16:19:32,337 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 16:19:32,339 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 16:19:32,587 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 16:19:32,587 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 16:19:32,757 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 16:19:32,758 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 16:19:32,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:19:32 BoogieIcfgContainer [2024-01-27 16:19:32,759 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 16:19:32,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 16:19:32,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 16:19:32,763 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 16:19:32,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 04:19:31" (1/3) ... [2024-01-27 16:19:32,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ccd28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:19:32, skipping insertion in model container [2024-01-27 16:19:32,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:31" (2/3) ... [2024-01-27 16:19:32,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ccd28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:19:32, skipping insertion in model container [2024-01-27 16:19:32,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:19:32" (3/3) ... [2024-01-27 16:19:32,768 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2024-01-27 16:19:32,774 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 16:19:32,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 16:19:32,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-27 16:19:32,782 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 16:19:32,820 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 16:19:32,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 42 transitions, 98 flow [2024-01-27 16:19:32,908 INFO L124 PetriNetUnfolderBase]: 7/40 cut-off events. [2024-01-27 16:19:32,909 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 16:19:32,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 7/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 92 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-01-27 16:19:32,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 42 transitions, 98 flow [2024-01-27 16:19:32,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 38 transitions, 85 flow [2024-01-27 16:19:32,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:19:32,943 INFO L357 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, mHoare=true, 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;@3e410e4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:19:32,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 16:19:32,951 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:19:32,952 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-01-27 16:19:32,952 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 16:19:32,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:32,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:32,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:19:32,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:32,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1086723474, now seen corresponding path program 1 times [2024-01-27 16:19:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:32,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516041987] [2024-01-27 16:19:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:32,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:33,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:19:33,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114715684] [2024-01-27 16:19:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:33,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:33,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:33,065 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) [2024-01-27 16:19:33,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 16:19:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:33,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 16:19:33,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:33,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:19:33,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:33,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516041987] [2024-01-27 16:19:33,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:19:33,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114715684] [2024-01-27 16:19:33,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114715684] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:33,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:33,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:19:33,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141130091] [2024-01-27 16:19:33,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:33,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:33,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:33,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:33,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-01-27 16:19:33,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:33,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:33,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-01-27 16:19:33,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:34,427 INFO L124 PetriNetUnfolderBase]: 562/1019 cut-off events. [2024-01-27 16:19:34,427 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-01-27 16:19:34,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 1019 events. 562/1019 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4887 event pairs, 206 based on Foata normal form. 54/989 useless extension candidates. Maximal degree in co-relation 1760. Up to 438 conditions per place. [2024-01-27 16:19:34,435 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 45 selfloop transitions, 1 changer transitions 1/56 dead transitions. [2024-01-27 16:19:34,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 221 flow [2024-01-27 16:19:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:19:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:19:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-01-27 16:19:34,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-01-27 16:19:34,446 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 85 flow. Second operand 3 states and 86 transitions. [2024-01-27 16:19:34,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 221 flow [2024-01-27 16:19:34,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 56 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 16:19:34,451 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 79 flow [2024-01-27 16:19:34,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-01-27 16:19:34,455 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2024-01-27 16:19:34,455 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 79 flow [2024-01-27 16:19:34,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:34,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:34,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:34,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 16:19:34,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-01-27 16:19:34,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:19:34,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:34,669 INFO L85 PathProgramCache]: Analyzing trace with hash -985375404, now seen corresponding path program 1 times [2024-01-27 16:19:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:34,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806872848] [2024-01-27 16:19:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:34,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:34,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:34,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806872848] [2024-01-27 16:19:34,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806872848] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:34,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:34,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:19:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320061265] [2024-01-27 16:19:34,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:34,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:34,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:34,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-01-27 16:19:34,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:34,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:34,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-01-27 16:19:34,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:35,100 INFO L124 PetriNetUnfolderBase]: 857/1594 cut-off events. [2024-01-27 16:19:35,100 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-01-27 16:19:35,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3062 conditions, 1594 events. 857/1594 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8177 event pairs, 287 based on Foata normal form. 33/1580 useless extension candidates. Maximal degree in co-relation 2442. Up to 838 conditions per place. [2024-01-27 16:19:35,106 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 40 selfloop transitions, 3 changer transitions 2/54 dead transitions. [2024-01-27 16:19:35,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 215 flow [2024-01-27 16:19:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:19:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:19:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-01-27 16:19:35,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-01-27 16:19:35,108 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 79 flow. Second operand 3 states and 83 transitions. [2024-01-27 16:19:35,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 215 flow [2024-01-27 16:19:35,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 16:19:35,110 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 94 flow [2024-01-27 16:19:35,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-01-27 16:19:35,110 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-01-27 16:19:35,110 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 94 flow [2024-01-27 16:19:35,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:35,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:35,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:35,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 16:19:35,111 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:19:35,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:35,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1471115457, now seen corresponding path program 1 times [2024-01-27 16:19:35,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:35,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999944268] [2024-01-27 16:19:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:35,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:35,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:35,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999944268] [2024-01-27 16:19:35,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999944268] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:35,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:35,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:19:35,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700475434] [2024-01-27 16:19:35,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:35,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:35,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:35,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-01-27 16:19:35,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:35,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:35,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-01-27 16:19:35,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:35,301 INFO L124 PetriNetUnfolderBase]: 546/1129 cut-off events. [2024-01-27 16:19:35,301 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-01-27 16:19:35,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2217 conditions, 1129 events. 546/1129 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5587 event pairs, 166 based on Foata normal form. 50/1162 useless extension candidates. Maximal degree in co-relation 1110. Up to 542 conditions per place. [2024-01-27 16:19:35,305 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 33 selfloop transitions, 4 changer transitions 1/47 dead transitions. [2024-01-27 16:19:35,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 195 flow [2024-01-27 16:19:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:19:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:19:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-01-27 16:19:35,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-01-27 16:19:35,307 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 94 flow. Second operand 3 states and 77 transitions. [2024-01-27 16:19:35,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 195 flow [2024-01-27 16:19:35,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:35,309 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 99 flow [2024-01-27 16:19:35,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-01-27 16:19:35,310 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2024-01-27 16:19:35,310 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 99 flow [2024-01-27 16:19:35,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:35,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:35,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:35,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 16:19:35,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:19:35,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1881845524, now seen corresponding path program 1 times [2024-01-27 16:19:35,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:35,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153451740] [2024-01-27 16:19:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:35,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:35,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:35,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153451740] [2024-01-27 16:19:35,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153451740] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:35,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:35,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:19:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069358819] [2024-01-27 16:19:35,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:35,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:35,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:35,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-01-27 16:19:35,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:35,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:35,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-01-27 16:19:35,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:35,571 INFO L124 PetriNetUnfolderBase]: 374/767 cut-off events. [2024-01-27 16:19:35,571 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-01-27 16:19:35,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 767 events. 374/767 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3318 event pairs, 137 based on Foata normal form. 10/759 useless extension candidates. Maximal degree in co-relation 894. Up to 428 conditions per place. [2024-01-27 16:19:35,575 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 36 selfloop transitions, 2 changer transitions 4/51 dead transitions. [2024-01-27 16:19:35,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 224 flow [2024-01-27 16:19:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:19:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:19:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-01-27 16:19:35,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-01-27 16:19:35,576 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 99 flow. Second operand 3 states and 78 transitions. [2024-01-27 16:19:35,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 224 flow [2024-01-27 16:19:35,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:35,578 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 103 flow [2024-01-27 16:19:35,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-01-27 16:19:35,579 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2024-01-27 16:19:35,579 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 103 flow [2024-01-27 16:19:35,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:35,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:35,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:35,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 16:19:35,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:19:35,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:35,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1707654869, now seen corresponding path program 1 times [2024-01-27 16:19:35,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:35,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103180271] [2024-01-27 16:19:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:35,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:35,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:19:35,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821134024] [2024-01-27 16:19:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:35,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:35,595 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) [2024-01-27 16:19:35,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 16:19:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:35,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 16:19:35,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:35,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-01-27 16:19:35,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-01-27 16:19:36,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-01-27 16:19:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:36,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:19:36,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:36,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103180271] [2024-01-27 16:19:36,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:19:36,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821134024] [2024-01-27 16:19:36,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821134024] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:36,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:36,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 16:19:36,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713017693] [2024-01-27 16:19:36,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:36,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 16:19:36,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:36,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 16:19:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-27 16:19:36,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-01-27 16:19:36,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 103 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:36,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:36,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-01-27 16:19:36,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:36,413 INFO L124 PetriNetUnfolderBase]: 503/1036 cut-off events. [2024-01-27 16:19:36,413 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2024-01-27 16:19:36,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2156 conditions, 1036 events. 503/1036 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5171 event pairs, 141 based on Foata normal form. 34/1052 useless extension candidates. Maximal degree in co-relation 1656. Up to 462 conditions per place. [2024-01-27 16:19:36,417 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 62 selfloop transitions, 12 changer transitions 9/92 dead transitions. [2024-01-27 16:19:36,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 92 transitions, 420 flow [2024-01-27 16:19:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 16:19:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 16:19:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-01-27 16:19:36,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-01-27 16:19:36,419 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 103 flow. Second operand 8 states and 183 transitions. [2024-01-27 16:19:36,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 92 transitions, 420 flow [2024-01-27 16:19:36,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 92 transitions, 413 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 16:19:36,421 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 192 flow [2024-01-27 16:19:36,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=192, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-01-27 16:19:36,421 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2024-01-27 16:19:36,421 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 192 flow [2024-01-27 16:19:36,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:36,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:36,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:36,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 16:19:36,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:36,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:19:36,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:36,645 INFO L85 PathProgramCache]: Analyzing trace with hash 888341105, now seen corresponding path program 2 times [2024-01-27 16:19:36,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:36,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081349970] [2024-01-27 16:19:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:36,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:36,660 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:19:36,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777292714] [2024-01-27 16:19:36,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:19:36,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:36,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:36,662 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) [2024-01-27 16:19:36,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 16:19:36,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 16:19:36,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:19:36,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 16:19:36,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:36,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-01-27 16:19:36,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-01-27 16:19:37,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-01-27 16:19:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:37,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:19:37,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081349970] [2024-01-27 16:19:37,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:19:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777292714] [2024-01-27 16:19:37,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777292714] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:37,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:37,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 16:19:37,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645812471] [2024-01-27 16:19:37,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:37,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 16:19:37,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:37,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 16:19:37,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-27 16:19:37,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-01-27 16:19:37,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 192 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:37,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:37,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-01-27 16:19:37,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:37,437 INFO L124 PetriNetUnfolderBase]: 680/1431 cut-off events. [2024-01-27 16:19:37,437 INFO L125 PetriNetUnfolderBase]: For 854/854 co-relation queries the response was YES. [2024-01-27 16:19:37,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3641 conditions, 1431 events. 680/1431 cut-off events. For 854/854 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8166 event pairs, 225 based on Foata normal form. 50/1455 useless extension candidates. Maximal degree in co-relation 3006. Up to 583 conditions per place. [2024-01-27 16:19:37,444 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 69 selfloop transitions, 19 changer transitions 10/107 dead transitions. [2024-01-27 16:19:37,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 107 transitions, 621 flow [2024-01-27 16:19:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 16:19:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 16:19:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-01-27 16:19:37,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-01-27 16:19:37,446 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 192 flow. Second operand 8 states and 187 transitions. [2024-01-27 16:19:37,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 107 transitions, 621 flow [2024-01-27 16:19:37,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 107 transitions, 603 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-27 16:19:37,452 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 353 flow [2024-01-27 16:19:37,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=353, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-01-27 16:19:37,452 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2024-01-27 16:19:37,452 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 353 flow [2024-01-27 16:19:37,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:37,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:37,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:37,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 16:19:37,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:37,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:19:37,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:37,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1283186161, now seen corresponding path program 3 times [2024-01-27 16:19:37,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:37,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062420648] [2024-01-27 16:19:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:37,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:37,694 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:19:37,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443708859] [2024-01-27 16:19:37,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:19:37,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:37,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:37,709 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) [2024-01-27 16:19:37,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 16:19:37,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-27 16:19:37,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:19:37,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 16:19:37,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:37,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-01-27 16:19:37,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-01-27 16:19:38,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-01-27 16:19:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:38,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:19:38,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:38,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062420648] [2024-01-27 16:19:38,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:19:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443708859] [2024-01-27 16:19:38,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443708859] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:38,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:38,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 16:19:38,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086146761] [2024-01-27 16:19:38,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:38,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 16:19:38,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:38,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 16:19:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-27 16:19:38,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-01-27 16:19:38,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 353 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:38,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:38,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-01-27 16:19:38,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:38,424 INFO L124 PetriNetUnfolderBase]: 749/1572 cut-off events. [2024-01-27 16:19:38,424 INFO L125 PetriNetUnfolderBase]: For 2611/2615 co-relation queries the response was YES. [2024-01-27 16:19:38,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 1572 events. 749/1572 cut-off events. For 2611/2615 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9178 event pairs, 243 based on Foata normal form. 20/1566 useless extension candidates. Maximal degree in co-relation 3866. Up to 700 conditions per place. [2024-01-27 16:19:38,431 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 77 selfloop transitions, 21 changer transitions 6/113 dead transitions. [2024-01-27 16:19:38,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 113 transitions, 785 flow [2024-01-27 16:19:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 16:19:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 16:19:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-01-27 16:19:38,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-01-27 16:19:38,432 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 353 flow. Second operand 8 states and 185 transitions. [2024-01-27 16:19:38,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 113 transitions, 785 flow [2024-01-27 16:19:38,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 113 transitions, 757 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:38,438 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 480 flow [2024-01-27 16:19:38,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=480, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-01-27 16:19:38,439 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2024-01-27 16:19:38,439 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 480 flow [2024-01-27 16:19:38,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:38,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:38,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:38,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 16:19:38,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:38,651 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:19:38,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:38,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1451273699, now seen corresponding path program 4 times [2024-01-27 16:19:38,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:38,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045744217] [2024-01-27 16:19:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:38,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:38,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:19:38,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246512489] [2024-01-27 16:19:38,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:19:38,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:38,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:38,663 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) [2024-01-27 16:19:38,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 16:19:38,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:19:38,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:19:38,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 16:19:38,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:38,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-01-27 16:19:38,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-01-27 16:19:39,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-01-27 16:19:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:39,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:19:39,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:39,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045744217] [2024-01-27 16:19:39,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:19:39,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246512489] [2024-01-27 16:19:39,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246512489] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:39,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:39,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 16:19:39,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627249373] [2024-01-27 16:19:39,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:39,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 16:19:39,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 16:19:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-01-27 16:19:39,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-01-27 16:19:39,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 480 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:39,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:39,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-01-27 16:19:39,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:39,433 INFO L124 PetriNetUnfolderBase]: 922/1962 cut-off events. [2024-01-27 16:19:39,433 INFO L125 PetriNetUnfolderBase]: For 4132/4144 co-relation queries the response was YES. [2024-01-27 16:19:39,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6041 conditions, 1962 events. 922/1962 cut-off events. For 4132/4144 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12114 event pairs, 185 based on Foata normal form. 30/1954 useless extension candidates. Maximal degree in co-relation 5220. Up to 543 conditions per place. [2024-01-27 16:19:39,446 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 88 selfloop transitions, 28 changer transitions 9/134 dead transitions. [2024-01-27 16:19:39,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 134 transitions, 1024 flow [2024-01-27 16:19:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 16:19:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 16:19:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-01-27 16:19:39,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-01-27 16:19:39,448 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 480 flow. Second operand 8 states and 198 transitions. [2024-01-27 16:19:39,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 134 transitions, 1024 flow [2024-01-27 16:19:39,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 985 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-01-27 16:19:39,459 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 597 flow [2024-01-27 16:19:39,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=597, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2024-01-27 16:19:39,461 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2024-01-27 16:19:39,461 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 597 flow [2024-01-27 16:19:39,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:39,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:39,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:39,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-27 16:19:39,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:39,662 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:19:39,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1144283973, now seen corresponding path program 1 times [2024-01-27 16:19:39,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:39,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408325531] [2024-01-27 16:19:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:39,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:39,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:39,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408325531] [2024-01-27 16:19:39,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2024-01-27 16:19:39,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503152653] [2024-01-27 16:19:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:39,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:39,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:39,697 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) [2024-01-27 16:19:39,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 16:19:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:39,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 2 conjunts are in the unsatisfiable core [2024-01-27 16:19:39,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:39,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:19:39,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503152653] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:39,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:39,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:19:39,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625667597] [2024-01-27 16:19:39,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:39,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:39,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-01-27 16:19:39,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 597 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:39,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:39,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-01-27 16:19:39,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:40,002 INFO L124 PetriNetUnfolderBase]: 867/1817 cut-off events. [2024-01-27 16:19:40,002 INFO L125 PetriNetUnfolderBase]: For 5038/5038 co-relation queries the response was YES. [2024-01-27 16:19:40,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5868 conditions, 1817 events. 867/1817 cut-off events. For 5038/5038 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10604 event pairs, 222 based on Foata normal form. 52/1828 useless extension candidates. Maximal degree in co-relation 5574. Up to 1161 conditions per place. [2024-01-27 16:19:40,010 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 66 selfloop transitions, 2 changer transitions 13/89 dead transitions. [2024-01-27 16:19:40,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 89 transitions, 806 flow [2024-01-27 16:19:40,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:19:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:19:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-01-27 16:19:40,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-01-27 16:19:40,013 INFO L175 Difference]: Start difference. First operand has 81 places, 76 transitions, 597 flow. Second operand 3 states and 77 transitions. [2024-01-27 16:19:40,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 89 transitions, 806 flow [2024-01-27 16:19:40,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 728 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-01-27 16:19:40,021 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 432 flow [2024-01-27 16:19:40,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2024-01-27 16:19:40,023 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2024-01-27 16:19:40,023 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 432 flow [2024-01-27 16:19:40,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:40,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:40,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:40,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 16:19:40,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:40,235 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:19:40,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:40,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1723538947, now seen corresponding path program 1 times [2024-01-27 16:19:40,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:40,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266049484] [2024-01-27 16:19:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:40,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:40,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:19:40,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077628417] [2024-01-27 16:19:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:40,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:40,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:40,269 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) [2024-01-27 16:19:40,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 16:19:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:19:40,472 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:19:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:19:40,551 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:19:40,551 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:19:40,552 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-01-27 16:19:40,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-01-27 16:19:40,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-01-27 16:19:40,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-01-27 16:19:40,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-01-27 16:19:40,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-01-27 16:19:40,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 16:19:40,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:40,757 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:40,762 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-27 16:19:40,762 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-27 16:19:40,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 04:19:40 BasicIcfg [2024-01-27 16:19:40,799 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-27 16:19:40,800 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-01-27 16:19:40,800 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-01-27 16:19:40,800 INFO L274 PluginConnector]: Witness Printer initialized [2024-01-27 16:19:40,800 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:19:32" (3/4) ... [2024-01-27 16:19:40,801 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2024-01-27 16:19:40,865 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-01-27 16:19:40,865 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-01-27 16:19:40,866 INFO L158 Benchmark]: Toolchain (without parser) took 9352.88ms. Allocated memory was 220.2MB in the beginning and 350.2MB in the end (delta: 130.0MB). Free memory was 150.3MB in the beginning and 292.5MB in the end (delta: -142.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 16:19:40,866 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory was 99.3MB in the beginning and 99.2MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 16:19:40,866 INFO L158 Benchmark]: CACSL2BoogieTranslator took 428.30ms. Allocated memory is still 220.2MB. Free memory was 150.0MB in the beginning and 128.7MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-01-27 16:19:40,866 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.37ms. Allocated memory is still 220.2MB. Free memory was 128.7MB in the beginning and 126.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 16:19:40,867 INFO L158 Benchmark]: Boogie Preprocessor took 56.40ms. Allocated memory is still 220.2MB. Free memory was 126.3MB in the beginning and 123.4MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 16:19:40,867 INFO L158 Benchmark]: RCFGBuilder took 711.27ms. Allocated memory is still 220.2MB. Free memory was 123.4MB in the beginning and 148.5MB in the end (delta: -25.2MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2024-01-27 16:19:40,867 INFO L158 Benchmark]: TraceAbstraction took 8038.91ms. Allocated memory was 220.2MB in the beginning and 350.2MB in the end (delta: 130.0MB). Free memory was 147.6MB in the beginning and 299.8MB in the end (delta: -152.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 16:19:40,867 INFO L158 Benchmark]: Witness Printer took 65.90ms. Allocated memory is still 350.2MB. Free memory was 299.8MB in the beginning and 292.5MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-01-27 16:19:40,868 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory was 99.3MB in the beginning and 99.2MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 428.30ms. Allocated memory is still 220.2MB. Free memory was 150.0MB in the beginning and 128.7MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.37ms. Allocated memory is still 220.2MB. Free memory was 128.7MB in the beginning and 126.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.40ms. Allocated memory is still 220.2MB. Free memory was 126.3MB in the beginning and 123.4MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 711.27ms. Allocated memory is still 220.2MB. Free memory was 123.4MB in the beginning and 148.5MB in the end (delta: -25.2MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * TraceAbstraction took 8038.91ms. Allocated memory was 220.2MB in the beginning and 350.2MB in the end (delta: 130.0MB). Free memory was 147.6MB in the beginning and 299.8MB in the end (delta: -152.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 65.90ms. Allocated memory is still 350.2MB. Free memory was 299.8MB in the beginning and 292.5MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L743] COND FALSE 2 !(\read(receive)) VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b [L710] 1 next = (next+1)%buffer_size VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=0, send=1] [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 64 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.9s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 394 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 354 mSDsluCounter, 111 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 106 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1799 IncrementalHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 5 mSDtfsCounter, 1799 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=597occurred in iteration=8, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 223 NumberOfCodeBlocks, 223 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 160 ConstructedInterpolants, 1 QuantifiedInterpolants, 1746 SizeOfPredicates, 43 NumberOfNonLiveVariables, 1259 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 5/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-01-27 16:19:40,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE