./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU --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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:59:20,613 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:59:20,718 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:59:20,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:59:20,727 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:59:20,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:59:20,777 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:59:20,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:59:20,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:59:20,781 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:59:20,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:59:20,782 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:59:20,783 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:59:20,783 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:59:20,784 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:59:20,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:59:20,784 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:59:20,787 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:59:20,787 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:59:20,788 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:59:20,788 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:59:20,789 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:59:20,789 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:59:20,789 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:59:20,790 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:59:20,790 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:59:20,795 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:59:20,795 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:59:20,795 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:59:20,796 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:59:20,796 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:59:20,797 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:59:20,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:59:20,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:59:20,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:59:20,800 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:59:20,800 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:59:20,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:59:20,800 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:59:20,802 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:59:20,803 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:59:20,803 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:59:20,803 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2024-10-31 21:59:21,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:59:21,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:59:21,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:59:21,225 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:59:21,225 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:59:21,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread/stack-2.i Unable to find full path for "g++" [2024-10-31 21:59:23,711 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:59:24,103 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:59:24,103 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/sv-benchmarks/c/pthread/stack-2.i [2024-10-31 21:59:24,140 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/data/ff66671b4/1aaa346caa98490f8b8c5b387f4c56ee/FLAG21dd6312d [2024-10-31 21:59:24,159 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/data/ff66671b4/1aaa346caa98490f8b8c5b387f4c56ee [2024-10-31 21:59:24,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:59:24,166 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:59:24,167 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:59:24,168 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:59:24,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:59:24,176 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:59:24" (1/1) ... [2024-10-31 21:59:24,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ec7a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:24, skipping insertion in model container [2024-10-31 21:59:24,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:59:24" (1/1) ... [2024-10-31 21:59:24,245 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:59:24,995 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2024-10-31 21:59:25,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:59:25,067 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:59:25,139 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2024-10-31 21:59:25,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:59:25,250 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:59:25,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25 WrapperNode [2024-10-31 21:59:25,251 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:59:25,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:59:25,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:59:25,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:59:25,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,295 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,339 INFO L138 Inliner]: procedures = 277, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 157 [2024-10-31 21:59:25,339 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:59:25,340 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:59:25,340 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:59:25,340 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:59:25,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,358 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,384 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 1 writes are split as follows [0, 0, 1]. [2024-10-31 21:59:25,385 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,386 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,401 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,416 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,432 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:59:25,433 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:59:25,433 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:59:25,433 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:59:25,438 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (1/1) ... [2024-10-31 21:59:25,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:59:25,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:25,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:59:25,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:59:25,551 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-31 21:59:25,551 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-31 21:59:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-31 21:59:25,553 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-31 21:59:25,554 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 21:59:25,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:59:25,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:59:25,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 21:59:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:59:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:59:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 21:59:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 21:59:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:59:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:59:25,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:59:25,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 21:59:25,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:59:25,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:59:25,560 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 21:59:25,812 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:59:25,816 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:59:26,252 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:59:26,252 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:59:26,598 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:59:26,599 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 21:59:26,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:59:26 BoogieIcfgContainer [2024-10-31 21:59:26,600 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:59:26,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:59:26,605 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:59:26,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:59:26,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:59:24" (1/3) ... [2024-10-31 21:59:26,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee4b113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:59:26, skipping insertion in model container [2024-10-31 21:59:26,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:25" (2/3) ... [2024-10-31 21:59:26,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee4b113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:59:26, skipping insertion in model container [2024-10-31 21:59:26,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:59:26" (3/3) ... [2024-10-31 21:59:26,612 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2024-10-31 21:59:26,634 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:59:26,635 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-31 21:59:26,635 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:59:26,713 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 21:59:26,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 84 flow [2024-10-31 21:59:26,803 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2024-10-31 21:59:26,803 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 21:59:26,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 5/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2024-10-31 21:59:26,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 84 flow [2024-10-31 21:59:26,816 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 71 flow [2024-10-31 21:59:26,833 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:59:26,843 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7abf2154, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:59:26,844 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-31 21:59:26,863 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:59:26,864 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-31 21:59:26,864 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 21:59:26,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:26,865 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:26,866 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:59:26,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash -71410199, now seen corresponding path program 1 times [2024-10-31 21:59:26,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:26,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779479435] [2024-10-31 21:59:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:26,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:27,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:27,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779479435] [2024-10-31 21:59:27,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779479435] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:27,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:27,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:59:27,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109355993] [2024-10-31 21:59:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:27,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:59:27,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:27,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:59:27,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:59:27,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-10-31 21:59:27,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:27,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:27,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-10-31 21:59:27,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:27,765 INFO L124 PetriNetUnfolderBase]: 342/655 cut-off events. [2024-10-31 21:59:27,765 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-31 21:59:27,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1267 conditions, 655 events. 342/655 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3003 event pairs, 75 based on Foata normal form. 44/652 useless extension candidates. Maximal degree in co-relation 1175. Up to 358 conditions per place. [2024-10-31 21:59:27,781 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 46 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2024-10-31 21:59:27,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 228 flow [2024-10-31 21:59:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:59:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:59:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-10-31 21:59:27,799 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-10-31 21:59:27,801 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 71 flow. Second operand 4 states and 90 transitions. [2024-10-31 21:59:27,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 228 flow [2024-10-31 21:59:27,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 56 transitions, 219 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:59:27,809 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 82 flow [2024-10-31 21:59:27,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-10-31 21:59:27,814 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2024-10-31 21:59:27,815 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 82 flow [2024-10-31 21:59:27,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:27,815 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:27,816 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:27,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:59:27,816 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:59:27,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:27,817 INFO L85 PathProgramCache]: Analyzing trace with hash -872048011, now seen corresponding path program 1 times [2024-10-31 21:59:27,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:27,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008130081] [2024-10-31 21:59:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:27,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:27,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:27,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008130081] [2024-10-31 21:59:27,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008130081] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:27,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:27,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:59:27,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996690312] [2024-10-31 21:59:27,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:27,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:59:27,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:27,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:59:27,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:59:27,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-10-31 21:59:27,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:27,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:27,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-10-31 21:59:27,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:28,149 INFO L124 PetriNetUnfolderBase]: 341/639 cut-off events. [2024-10-31 21:59:28,149 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-10-31 21:59:28,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 639 events. 341/639 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2799 event pairs, 128 based on Foata normal form. 10/606 useless extension candidates. Maximal degree in co-relation 989. Up to 398 conditions per place. [2024-10-31 21:59:28,155 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 33 selfloop transitions, 2 changer transitions 2/43 dead transitions. [2024-10-31 21:59:28,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 183 flow [2024-10-31 21:59:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:59:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:59:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-10-31 21:59:28,158 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-10-31 21:59:28,158 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 82 flow. Second operand 3 states and 62 transitions. [2024-10-31 21:59:28,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 183 flow [2024-10-31 21:59:28,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:59:28,162 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 92 flow [2024-10-31 21:59:28,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-10-31 21:59:28,163 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2024-10-31 21:59:28,163 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 92 flow [2024-10-31 21:59:28,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:28,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:28,163 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:28,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:59:28,164 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:59:28,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:28,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1733458170, now seen corresponding path program 1 times [2024-10-31 21:59:28,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:28,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547257070] [2024-10-31 21:59:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:28,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:28,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:28,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547257070] [2024-10-31 21:59:28,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547257070] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:28,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684303459] [2024-10-31 21:59:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:28,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:28,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:28,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:28,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:59:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:28,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 21:59:28,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:28,859 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 8 treesize of output 1 [2024-10-31 21:59:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:29,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:29,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684303459] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:29,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:29,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-31 21:59:29,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527756570] [2024-10-31 21:59:29,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:29,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 21:59:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 21:59:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:59:29,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-10-31 21:59:29,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 92 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:29,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:29,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-10-31 21:59:29,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:29,917 INFO L124 PetriNetUnfolderBase]: 1030/1974 cut-off events. [2024-10-31 21:59:29,918 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-10-31 21:59:29,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4119 conditions, 1974 events. 1030/1974 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 10241 event pairs, 79 based on Foata normal form. 0/1879 useless extension candidates. Maximal degree in co-relation 3565. Up to 390 conditions per place. [2024-10-31 21:59:29,935 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 137 selfloop transitions, 18 changer transitions 2/165 dead transitions. [2024-10-31 21:59:29,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 165 transitions, 729 flow [2024-10-31 21:59:29,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 21:59:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 21:59:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-10-31 21:59:29,939 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6404761904761904 [2024-10-31 21:59:29,939 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 92 flow. Second operand 12 states and 269 transitions. [2024-10-31 21:59:29,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 165 transitions, 729 flow [2024-10-31 21:59:29,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 165 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:59:29,945 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 237 flow [2024-10-31 21:59:29,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=237, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-10-31 21:59:29,946 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 19 predicate places. [2024-10-31 21:59:29,947 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 237 flow [2024-10-31 21:59:29,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:29,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:29,948 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:29,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 21:59:30,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:30,152 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:59:30,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:30,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1632992800, now seen corresponding path program 1 times [2024-10-31 21:59:30,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:30,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281772726] [2024-10-31 21:59:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:30,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:30,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:30,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281772726] [2024-10-31 21:59:30,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281772726] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:30,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:30,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:59:30,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593999326] [2024-10-31 21:59:30,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:30,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:59:30,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:59:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:59:30,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-10-31 21:59:30,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:30,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:30,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-10-31 21:59:30,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:30,601 INFO L124 PetriNetUnfolderBase]: 593/1232 cut-off events. [2024-10-31 21:59:30,601 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-10-31 21:59:30,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2780 conditions, 1232 events. 593/1232 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5916 event pairs, 204 based on Foata normal form. 60/1277 useless extension candidates. Maximal degree in co-relation 2653. Up to 580 conditions per place. [2024-10-31 21:59:30,612 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 42 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-10-31 21:59:30,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 309 flow [2024-10-31 21:59:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:59:30,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:59:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-10-31 21:59:30,614 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-10-31 21:59:30,614 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 237 flow. Second operand 3 states and 61 transitions. [2024-10-31 21:59:30,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 309 flow [2024-10-31 21:59:30,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 285 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-10-31 21:59:30,624 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 178 flow [2024-10-31 21:59:30,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-10-31 21:59:30,626 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2024-10-31 21:59:30,626 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 178 flow [2024-10-31 21:59:30,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:30,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:30,627 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:30,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 21:59:30,627 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:59:30,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash 141966125, now seen corresponding path program 1 times [2024-10-31 21:59:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:30,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009299925] [2024-10-31 21:59:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:30,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:31,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:31,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009299925] [2024-10-31 21:59:31,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009299925] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:31,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:31,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:59:31,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541948619] [2024-10-31 21:59:31,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:31,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:59:31,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:31,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:59:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:59:31,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-10-31 21:59:31,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:31,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:31,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-10-31 21:59:31,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:31,886 INFO L124 PetriNetUnfolderBase]: 653/1345 cut-off events. [2024-10-31 21:59:31,886 INFO L125 PetriNetUnfolderBase]: For 506/506 co-relation queries the response was YES. [2024-10-31 21:59:31,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 1345 events. 653/1345 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6555 event pairs, 145 based on Foata normal form. 0/1325 useless extension candidates. Maximal degree in co-relation 2725. Up to 840 conditions per place. [2024-10-31 21:59:31,895 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 60 selfloop transitions, 5 changer transitions 2/75 dead transitions. [2024-10-31 21:59:31,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 402 flow [2024-10-31 21:59:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:59:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:59:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-10-31 21:59:31,898 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5771428571428572 [2024-10-31 21:59:31,898 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 178 flow. Second operand 5 states and 101 transitions. [2024-10-31 21:59:31,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 402 flow [2024-10-31 21:59:31,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:59:31,905 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 210 flow [2024-10-31 21:59:31,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-10-31 21:59:31,906 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 22 predicate places. [2024-10-31 21:59:31,906 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 210 flow [2024-10-31 21:59:31,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:31,906 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:31,907 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:31,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 21:59:31,907 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:59:31,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1462533000, now seen corresponding path program 1 times [2024-10-31 21:59:31,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:31,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372852088] [2024-10-31 21:59:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:31,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:32,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:32,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372852088] [2024-10-31 21:59:32,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372852088] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:32,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178433414] [2024-10-31 21:59:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:32,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:32,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:32,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:32,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:59:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:32,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 21:59:32,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:32,827 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 8 treesize of output 1 [2024-10-31 21:59:32,920 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 19 treesize of output 1 [2024-10-31 21:59:33,044 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 68 treesize of output 32 [2024-10-31 21:59:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:33,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:33,943 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 9 treesize of output 1 [2024-10-31 21:59:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:34,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178433414] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:34,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:34,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-10-31 21:59:34,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390782638] [2024-10-31 21:59:34,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:34,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 21:59:34,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 21:59:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:59:34,110 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-10-31 21:59:34,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 210 flow. Second operand has 14 states, 14 states have (on average 12.857142857142858) internal successors, (180), 14 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:34,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:34,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-10-31 21:59:34,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:35,447 INFO L124 PetriNetUnfolderBase]: 1248/2585 cut-off events. [2024-10-31 21:59:35,447 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2024-10-31 21:59:35,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5945 conditions, 2585 events. 1248/2585 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14148 event pairs, 231 based on Foata normal form. 0/2553 useless extension candidates. Maximal degree in co-relation 4758. Up to 384 conditions per place. [2024-10-31 21:59:35,470 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 138 selfloop transitions, 28 changer transitions 0/174 dead transitions. [2024-10-31 21:59:35,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 174 transitions, 966 flow [2024-10-31 21:59:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 21:59:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 21:59:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-10-31 21:59:35,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-10-31 21:59:35,473 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 210 flow. Second operand 12 states and 260 transitions. [2024-10-31 21:59:35,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 174 transitions, 966 flow [2024-10-31 21:59:35,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 174 transitions, 961 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:59:35,486 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 376 flow [2024-10-31 21:59:35,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=376, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-10-31 21:59:35,488 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2024-10-31 21:59:35,488 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 376 flow [2024-10-31 21:59:35,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.857142857142858) internal successors, (180), 14 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:35,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:35,489 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:35,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 21:59:35,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:35,691 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:59:35,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:35,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1295806524, now seen corresponding path program 1 times [2024-10-31 21:59:35,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:35,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060817733] [2024-10-31 21:59:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:35,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 21:59:35,772 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 21:59:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 21:59:35,861 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 21:59:35,861 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 21:59:35,863 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-10-31 21:59:35,865 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-10-31 21:59:35,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-10-31 21:59:35,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-10-31 21:59:35,866 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-31 21:59:35,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-31 21:59:35,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 21:59:35,867 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:35,964 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-10-31 21:59:35,964 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 21:59:35,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 09:59:35 BasicIcfg [2024-10-31 21:59:35,973 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 21:59:35,974 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-31 21:59:35,974 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-31 21:59:35,974 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-31 21:59:35,975 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:59:26" (3/4) ... [2024-10-31 21:59:35,976 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-10-31 21:59:36,050 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/witness.graphml [2024-10-31 21:59:36,050 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-31 21:59:36,051 INFO L158 Benchmark]: Toolchain (without parser) took 11885.38ms. Allocated memory was 153.1MB in the beginning and 245.4MB in the end (delta: 92.3MB). Free memory was 106.9MB in the beginning and 87.6MB in the end (delta: 19.3MB). Peak memory consumption was 113.7MB. Max. memory is 16.1GB. [2024-10-31 21:59:36,051 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 153.1MB. Free memory is still 125.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-31 21:59:36,052 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1084.30ms. Allocated memory is still 153.1MB. Free memory was 106.7MB in the beginning and 74.1MB in the end (delta: 32.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-10-31 21:59:36,052 INFO L158 Benchmark]: Boogie Procedure Inliner took 86.96ms. Allocated memory is still 153.1MB. Free memory was 74.1MB in the beginning and 71.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-31 21:59:36,052 INFO L158 Benchmark]: Boogie Preprocessor took 91.91ms. Allocated memory is still 153.1MB. Free memory was 71.3MB in the beginning and 68.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-31 21:59:36,053 INFO L158 Benchmark]: RCFGBuilder took 1167.67ms. Allocated memory was 153.1MB in the beginning and 203.4MB in the end (delta: 50.3MB). Free memory was 68.6MB in the beginning and 142.4MB in the end (delta: -73.8MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. [2024-10-31 21:59:36,053 INFO L158 Benchmark]: TraceAbstraction took 9368.92ms. Allocated memory was 203.4MB in the beginning and 245.4MB in the end (delta: 41.9MB). Free memory was 141.4MB in the beginning and 94.9MB in the end (delta: 46.4MB). Peak memory consumption was 89.4MB. Max. memory is 16.1GB. [2024-10-31 21:59:36,053 INFO L158 Benchmark]: Witness Printer took 76.52ms. Allocated memory is still 245.4MB. Free memory was 94.9MB in the beginning and 87.6MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-10-31 21:59:36,058 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 153.1MB. Free memory is still 125.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1084.30ms. Allocated memory is still 153.1MB. Free memory was 106.7MB in the beginning and 74.1MB in the end (delta: 32.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 86.96ms. Allocated memory is still 153.1MB. Free memory was 74.1MB in the beginning and 71.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 91.91ms. Allocated memory is still 153.1MB. Free memory was 71.3MB in the beginning and 68.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1167.67ms. Allocated memory was 153.1MB in the beginning and 203.4MB in the end (delta: 50.3MB). Free memory was 68.6MB in the beginning and 142.4MB in the end (delta: -73.8MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. * TraceAbstraction took 9368.92ms. Allocated memory was 203.4MB in the beginning and 245.4MB in the end (delta: 41.9MB). Free memory was 141.4MB in the beginning and 94.9MB in the end (delta: 46.4MB). Peak memory consumption was 89.4MB. Max. memory is 16.1GB. * Witness Printer took 76.52ms. Allocated memory is still 245.4MB. Free memory was 94.9MB in the beginning and 87.6MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L936] 0 static unsigned int arr[(5)]; [L936] 0 static unsigned int arr[(5)]; [L936] 0 static unsigned int arr[(5)]; [L936] 0 static unsigned int arr[(5)]; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1=-1, m={4:0}, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L992] COND TRUE 1 i<(5) VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1=-1, id2=0, m={4:0}, top=0] [L1006] 2 int i; [L1007] 2 i=0 VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=4, top=1] [L1007] COND TRUE 2 i<(5) VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: 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: 1024]: 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: 941]: 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, 55 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: 9.1s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 500 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 496 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 26 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 967 IncrementalHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26 mSolverCounterUnsat, 2 mSDtfsCounter, 967 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=6, InterpolantAutomatonStates: 39, 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, 0.3s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 164 ConstructedInterpolants, 7 QuantifiedInterpolants, 1583 SizeOfPredicates, 21 NumberOfNonLiveVariables, 311 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 0/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-10-31 21:59:36,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cc90df-49f8-48e8-bfd2-45ee86b3b6b7/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE