./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:51:21,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:51:21,180 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:51:21,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:51:21,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:51:21,212 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:51:21,213 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:51:21,214 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:51:21,214 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:51:21,215 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:51:21,216 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:51:21,217 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:51:21,217 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:51:21,218 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:51:21,218 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:51:21,219 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:51:21,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:51:21,220 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:51:21,221 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:51:21,221 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:51:21,222 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:51:21,222 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:51:21,223 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:51:21,224 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:51:21,224 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:51:21,225 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:51:21,225 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:51:21,226 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:51:21,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:51:21,227 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:51:21,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:51:21,228 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:51:21,229 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:51:21,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:51:21,230 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:51:21,231 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:51:21,231 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:51:21,231 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:51:21,232 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:51:21,232 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_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2023-11-06 22:51:21,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:51:21,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:51:21,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:51:21,637 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:51:21,637 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:51:21,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2023-11-06 22:51:24,791 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:51:25,237 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:51:25,240 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2023-11-06 22:51:25,281 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/data/af9ef1de9/b3eea65dd5b04cb8b2105df0698a21d8/FLAG3c01eff0a [2023-11-06 22:51:25,300 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/data/af9ef1de9/b3eea65dd5b04cb8b2105df0698a21d8 [2023-11-06 22:51:25,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:51:25,312 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:51:25,315 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:51:25,315 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:51:25,321 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:51:25,324 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:25" (1/1) ... [2023-11-06 22:51:25,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e148c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:25, skipping insertion in model container [2023-11-06 22:51:25,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:25" (1/1) ... [2023-11-06 22:51:25,450 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:51:26,364 WARN L240 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_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-11-06 22:51:26,421 WARN L240 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_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-11-06 22:51:26,437 WARN L240 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_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-11-06 22:51:26,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:51:26,491 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:51:26,542 WARN L240 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_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-11-06 22:51:26,560 WARN L240 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_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-11-06 22:51:26,564 WARN L240 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_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-11-06 22:51:26,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:51:26,734 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:51:26,735 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:51:26,743 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:51:26,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26 WrapperNode [2023-11-06 22:51:26,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:51:26,745 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:51:26,745 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:51:26,745 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:51:26,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:26,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:26,886 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1843 [2023-11-06 22:51:26,887 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:51:26,887 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:51:26,887 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:51:26,888 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:51:26,900 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:26,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:26,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:26,934 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:26,998 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:27,023 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:27,031 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:27,052 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:27,065 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:51:27,067 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:51:27,067 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:51:27,067 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:51:27,068 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (1/1) ... [2023-11-06 22:51:27,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:51:27,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:27,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:51:27,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:51:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-11-06 22:51:27,135 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-11-06 22:51:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:51:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:51:27,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:51:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:51:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:51:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:51:27,139 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:51:27,494 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:51:27,497 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:51:29,943 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:51:30,460 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:51:30,461 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-06 22:51:30,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:30 BoogieIcfgContainer [2023-11-06 22:51:30,466 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:51:30,472 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:51:30,473 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:51:30,476 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:51:30,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:51:25" (1/3) ... [2023-11-06 22:51:30,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f683520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:30, skipping insertion in model container [2023-11-06 22:51:30,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:26" (2/3) ... [2023-11-06 22:51:30,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f683520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:30, skipping insertion in model container [2023-11-06 22:51:30,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:30" (3/3) ... [2023-11-06 22:51:30,482 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-11-06 22:51:30,496 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:51:30,507 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:51:30,507 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-11-06 22:51:30,508 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:51:30,729 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:51:30,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1744 places, 1811 transitions, 3629 flow [2023-11-06 22:51:32,566 INFO L124 PetriNetUnfolderBase]: 131/3370 cut-off events. [2023-11-06 22:51:32,566 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:51:32,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3375 conditions, 3370 events. 131/3370 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 16132 event pairs, 0 based on Foata normal form. 0/3226 useless extension candidates. Maximal degree in co-relation 1725. Up to 6 conditions per place. [2023-11-06 22:51:32,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 1744 places, 1811 transitions, 3629 flow [2023-11-06 22:51:32,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1744 places, 1811 transitions, 3629 flow [2023-11-06 22:51:32,666 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:51:32,678 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1744 places, 1811 transitions, 3629 flow [2023-11-06 22:51:32,681 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1744 places, 1811 transitions, 3629 flow [2023-11-06 22:51:32,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1744 places, 1811 transitions, 3629 flow [2023-11-06 22:51:34,059 INFO L124 PetriNetUnfolderBase]: 131/3370 cut-off events. [2023-11-06 22:51:34,059 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:51:34,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3375 conditions, 3370 events. 131/3370 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 16132 event pairs, 0 based on Foata normal form. 0/3226 useless extension candidates. Maximal degree in co-relation 1725. Up to 6 conditions per place. [2023-11-06 22:51:34,357 INFO L119 LiptonReduction]: Number of co-enabled transitions 503930 [2023-11-06 22:53:35,634 WARN L293 SmtUtils]: Spent 10.92s on a formula simplification. DAG size of input: 214 DAG size of output: 206 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-06 22:53:52,369 WARN L293 SmtUtils]: Spent 11.92s on a formula simplification. DAG size of input: 214 DAG size of output: 206 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-06 22:53:57,045 INFO L134 LiptonReduction]: Checked pairs total: 551528 [2023-11-06 22:53:57,046 INFO L136 LiptonReduction]: Total number of compositions: 1739 [2023-11-06 22:53:57,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:53:57,068 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=LoopsAndPotentialCycles, 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;@7c830005, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:53:57,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:53:57,075 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:53:57,075 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-06 22:53:57,075 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:53:57,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:57,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:57,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:53:57,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:57,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1439820462, now seen corresponding path program 1 times [2023-11-06 22:53:57,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:57,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889666281] [2023-11-06 22:53:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:57,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:57,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:57,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889666281] [2023-11-06 22:53:57,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889666281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:57,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:57,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:53:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668479772] [2023-11-06 22:53:57,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:57,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:53:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:57,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:53:57,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:53:57,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1717 out of 3550 [2023-11-06 22:53:57,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 310 transitions, 627 flow. Second operand has 3 states, 3 states have (on average 1719.3333333333333) internal successors, (5158), 3 states have internal predecessors, (5158), 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) [2023-11-06 22:53:57,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:57,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1717 of 3550 [2023-11-06 22:53:57,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:04,370 INFO L124 PetriNetUnfolderBase]: 14136/25188 cut-off events. [2023-11-06 22:54:04,371 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:54:04,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50214 conditions, 25188 events. 14136/25188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 153941 event pairs, 5221 based on Foata normal form. 48/21275 useless extension candidates. Maximal degree in co-relation 50154. Up to 12570 conditions per place. [2023-11-06 22:54:04,502 INFO L140 encePairwiseOnDemand]: 3534/3550 looper letters, 581 selfloop transitions, 14 changer transitions 4/603 dead transitions. [2023-11-06 22:54:04,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 603 transitions, 2411 flow [2023-11-06 22:54:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:54:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:54:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5758 transitions. [2023-11-06 22:54:04,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406572769953052 [2023-11-06 22:54:04,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5758 transitions. [2023-11-06 22:54:04,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5758 transitions. [2023-11-06 22:54:04,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:04,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5758 transitions. [2023-11-06 22:54:04,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1919.3333333333333) internal successors, (5758), 3 states have internal predecessors, (5758), 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) [2023-11-06 22:54:04,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3550.0) internal successors, (14200), 4 states have internal predecessors, (14200), 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) [2023-11-06 22:54:04,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3550.0) internal successors, (14200), 4 states have internal predecessors, (14200), 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) [2023-11-06 22:54:04,626 INFO L175 Difference]: Start difference. First operand has 265 places, 310 transitions, 627 flow. Second operand 3 states and 5758 transitions. [2023-11-06 22:54:04,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 603 transitions, 2411 flow [2023-11-06 22:54:04,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 603 transitions, 2411 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:54:04,649 INFO L231 Difference]: Finished difference. Result has 268 places, 313 transitions, 687 flow [2023-11-06 22:54:04,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3550, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=687, PETRI_PLACES=268, PETRI_TRANSITIONS=313} [2023-11-06 22:54:04,655 INFO L281 CegarLoopForPetriNet]: 265 programPoint places, 3 predicate places. [2023-11-06 22:54:04,655 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 313 transitions, 687 flow [2023-11-06 22:54:04,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1719.3333333333333) internal successors, (5158), 3 states have internal predecessors, (5158), 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) [2023-11-06 22:54:04,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:04,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:04,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:54:04,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:54:04,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:04,662 INFO L85 PathProgramCache]: Analyzing trace with hash -313419480, now seen corresponding path program 1 times [2023-11-06 22:54:04,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:04,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435272928] [2023-11-06 22:54:04,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:04,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:54:04,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:04,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435272928] [2023-11-06 22:54:04,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435272928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:04,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393286003] [2023-11-06 22:54:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:04,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:04,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:04,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:04,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:54:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:04,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:54:05,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:54:05,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:54:05,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393286003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:05,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:05,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:54:05,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734827677] [2023-11-06 22:54:05,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:05,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:54:05,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:05,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:54:05,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:54:05,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1711 out of 3550 [2023-11-06 22:54:05,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 313 transitions, 687 flow. Second operand has 7 states, 7 states have (on average 1712.5714285714287) internal successors, (11988), 7 states have internal predecessors, (11988), 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) [2023-11-06 22:54:05,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:05,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1711 of 3550 [2023-11-06 22:54:05,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:05,562 INFO L124 PetriNetUnfolderBase]: 59/162 cut-off events. [2023-11-06 22:54:05,562 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-06 22:54:05,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 162 events. 59/162 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 495 event pairs, 0 based on Foata normal form. 27/177 useless extension candidates. Maximal degree in co-relation 306. Up to 103 conditions per place. [2023-11-06 22:54:05,564 INFO L140 encePairwiseOnDemand]: 3545/3550 looper letters, 58 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2023-11-06 22:54:05,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 66 transitions, 286 flow [2023-11-06 22:54:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:54:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:54:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10335 transitions. [2023-11-06 22:54:05,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852112676056338 [2023-11-06 22:54:05,605 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 10335 transitions. [2023-11-06 22:54:05,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 10335 transitions. [2023-11-06 22:54:05,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:05,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 10335 transitions. [2023-11-06 22:54:05,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1722.5) internal successors, (10335), 6 states have internal predecessors, (10335), 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) [2023-11-06 22:54:05,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3550.0) internal successors, (24850), 7 states have internal predecessors, (24850), 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) [2023-11-06 22:54:05,700 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3550.0) internal successors, (24850), 7 states have internal predecessors, (24850), 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) [2023-11-06 22:54:05,701 INFO L175 Difference]: Start difference. First operand has 268 places, 313 transitions, 687 flow. Second operand 6 states and 10335 transitions. [2023-11-06 22:54:05,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 66 transitions, 286 flow [2023-11-06 22:54:05,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 66 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:54:05,704 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 112 flow [2023-11-06 22:54:05,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3550, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-06 22:54:05,706 INFO L281 CegarLoopForPetriNet]: 265 programPoint places, -226 predicate places. [2023-11-06 22:54:05,706 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 112 flow [2023-11-06 22:54:05,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1712.5714285714287) internal successors, (11988), 7 states have internal predecessors, (11988), 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) [2023-11-06 22:54:05,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:05,711 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-06 22:54:05,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:54:05,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde2dc2b-80dc-431d-b1ea-6820dc6669a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:05,918 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:54:05,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash 641157556, now seen corresponding path program 2 times [2023-11-06 22:54:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:05,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313293780] [2023-11-06 22:54:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:54:05,996 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:54:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:54:06,071 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:54:06,071 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:54:06,072 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-06 22:54:06,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-06 22:54:06,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-06 22:54:06,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-06 22:54:06,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-06 22:54:06,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-06 22:54:06,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:54:06,077 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-06 22:54:06,081 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:54:06,081 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:54:06,228 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:54:06,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1902 places, 1974 transitions, 3964 flow [2023-11-06 22:54:08,271 INFO L124 PetriNetUnfolderBase]: 204/5137 cut-off events. [2023-11-06 22:54:08,271 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:54:08,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5149 conditions, 5137 events. 204/5137 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 30488 event pairs, 0 based on Foata normal form. 0/4913 useless extension candidates. Maximal degree in co-relation 3372. Up to 9 conditions per place. [2023-11-06 22:54:08,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 1902 places, 1974 transitions, 3964 flow [2023-11-06 22:54:08,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1902 places, 1974 transitions, 3964 flow [2023-11-06 22:54:08,411 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:54:08,411 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1902 places, 1974 transitions, 3964 flow [2023-11-06 22:54:08,412 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1902 places, 1974 transitions, 3964 flow [2023-11-06 22:54:08,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1902 places, 1974 transitions, 3964 flow [2023-11-06 22:54:10,427 INFO L124 PetriNetUnfolderBase]: 204/5137 cut-off events. [2023-11-06 22:54:10,427 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:54:10,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5149 conditions, 5137 events. 204/5137 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 30488 event pairs, 0 based on Foata normal form. 0/4913 useless extension candidates. Maximal degree in co-relation 3372. Up to 9 conditions per place. [2023-11-06 22:54:11,020 INFO L119 LiptonReduction]: Number of co-enabled transitions 1063244