./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl --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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:21:30,083 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:30,205 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:30,212 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:30,213 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:30,250 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:30,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:30,252 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:30,253 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:30,258 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:30,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:30,260 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:30,260 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:30,262 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:30,262 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:30,263 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:30,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:30,263 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:30,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:30,264 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:30,265 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:30,265 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:30,266 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:30,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:30,266 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:30,267 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:30,268 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:30,268 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:30,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:30,269 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:30,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:30,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:30,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:30,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:30,271 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:30,272 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:30,272 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:30,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:30,272 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:30,272 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_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2023-11-12 02:21:30,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:30,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:30,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:30,604 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:30,604 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:30,605 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-11-12 02:21:33,627 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:21:33,942 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:21:33,943 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-11-12 02:21:33,959 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/data/718b5f8f8/d77316f1feab4fbc8ca691fa56339bc2/FLAG33b397f3a [2023-11-12 02:21:33,980 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/data/718b5f8f8/d77316f1feab4fbc8ca691fa56339bc2 [2023-11-12 02:21:33,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:21:33,988 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:21:33,989 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:33,989 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:21:34,000 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:21:34,001 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:34,002 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33066c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34, skipping insertion in model container [2023-11-12 02:21:34,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:34,051 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:21:34,523 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_c087e283-ce4f-4b41-bece-191fb332224c/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2023-11-12 02:21:34,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:34,572 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:21:34,636 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_c087e283-ce4f-4b41-bece-191fb332224c/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2023-11-12 02:21:34,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:34,700 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:21:34,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34 WrapperNode [2023-11-12 02:21:34,700 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:34,701 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:34,702 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:21:34,702 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:21:34,710 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,750 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2023-11-12 02:21:34,750 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:34,751 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:21:34,751 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:21:34,751 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:21:34,762 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,774 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,778 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,782 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,785 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:21:34,786 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:21:34,787 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:21:34,787 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:21:34,788 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (1/1) ... [2023-11-12 02:21:34,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:34,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:34,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:21:34,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:21:34,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:21:34,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:21:34,864 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:21:34,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:21:34,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:21:34,865 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:21:34,865 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:21:34,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:21:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-11-12 02:21:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:21:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:21:34,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:21:34,868 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:21:35,024 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:21:35,026 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:21:35,245 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:21:35,254 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:21:35,254 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-12 02:21:35,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:35 BoogieIcfgContainer [2023-11-12 02:21:35,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:21:35,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:21:35,260 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:21:35,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:21:35,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:21:33" (1/3) ... [2023-11-12 02:21:35,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6960f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:35, skipping insertion in model container [2023-11-12 02:21:35,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:34" (2/3) ... [2023-11-12 02:21:35,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6960f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:35, skipping insertion in model container [2023-11-12 02:21:35,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:35" (3/3) ... [2023-11-12 02:21:35,268 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-11-12 02:21:35,279 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:21:35,291 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:21:35,292 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:21:35,292 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:21:35,357 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-12 02:21:35,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 107 transitions, 221 flow [2023-11-12 02:21:35,518 INFO L124 PetriNetUnfolderBase]: 21/149 cut-off events. [2023-11-12 02:21:35,519 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:21:35,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 149 events. 21/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 376 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 75. Up to 6 conditions per place. [2023-11-12 02:21:35,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 107 transitions, 221 flow [2023-11-12 02:21:35,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 102 transitions, 208 flow [2023-11-12 02:21:35,539 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:35,570 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 102 transitions, 208 flow [2023-11-12 02:21:35,574 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 102 transitions, 208 flow [2023-11-12 02:21:35,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 102 transitions, 208 flow [2023-11-12 02:21:35,628 INFO L124 PetriNetUnfolderBase]: 20/144 cut-off events. [2023-11-12 02:21:35,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:35,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 144 events. 20/144 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 366 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 75. Up to 6 conditions per place. [2023-11-12 02:21:35,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-11-12 02:21:38,619 INFO L134 LiptonReduction]: Checked pairs total: 4076 [2023-11-12 02:21:38,619 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-11-12 02:21:38,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:38,657 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6f0c1681, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:38,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:21:38,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:21:38,671 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-11-12 02:21:38,671 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:38,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:38,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:21:38,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:38,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:38,688 INFO L85 PathProgramCache]: Analyzing trace with hash 398704679, now seen corresponding path program 1 times [2023-11-12 02:21:38,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:38,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005180159] [2023-11-12 02:21:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:38,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:38,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:38,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005180159] [2023-11-12 02:21:38,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005180159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:38,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:38,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:21:38,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483277568] [2023-11-12 02:21:38,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:38,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:38,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:38,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:38,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:39,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 192 [2023-11-12 02:21:39,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 34 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2023-11-12 02:21:39,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:39,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 192 [2023-11-12 02:21:39,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:39,157 INFO L124 PetriNetUnfolderBase]: 89/209 cut-off events. [2023-11-12 02:21:39,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:39,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 209 events. 89/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 839 event pairs, 0 based on Foata normal form. 20/193 useless extension candidates. Maximal degree in co-relation 384. Up to 180 conditions per place. [2023-11-12 02:21:39,164 INFO L140 encePairwiseOnDemand]: 180/192 looper letters, 23 selfloop transitions, 2 changer transitions 5/33 dead transitions. [2023-11-12 02:21:39,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 130 flow [2023-11-12 02:21:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:21:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-11-12 02:21:39,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-12 02:21:39,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-11-12 02:21:39,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-11-12 02:21:39,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:39,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-11-12 02:21:39,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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) [2023-11-12 02:21:39,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-12 02:21:39,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-12 02:21:39,220 INFO L175 Difference]: Start difference. First operand has 27 places, 34 transitions, 72 flow. Second operand 3 states and 304 transitions. [2023-11-12 02:21:39,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 130 flow [2023-11-12 02:21:39,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:21:39,226 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 50 flow [2023-11-12 02:21:39,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-11-12 02:21:39,232 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-11-12 02:21:39,232 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 50 flow [2023-11-12 02:21:39,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2023-11-12 02:21:39,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:39,233 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:21:39,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:21:39,234 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:39,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:39,234 INFO L85 PathProgramCache]: Analyzing trace with hash -504932391, now seen corresponding path program 1 times [2023-11-12 02:21:39,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:39,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420434450] [2023-11-12 02:21:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:39,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:39,302 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:21:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:39,381 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:21:39,381 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:21:39,383 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:21:39,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:21:39,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:21:39,387 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:21:39,390 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:21:39,390 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:21:39,434 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:21:39,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 137 transitions, 290 flow [2023-11-12 02:21:39,494 INFO L124 PetriNetUnfolderBase]: 37/247 cut-off events. [2023-11-12 02:21:39,494 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:21:39,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 247 events. 37/247 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 750 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2023-11-12 02:21:39,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 137 transitions, 290 flow [2023-11-12 02:21:39,501 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 137 transitions, 290 flow [2023-11-12 02:21:39,501 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:39,501 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 137 transitions, 290 flow [2023-11-12 02:21:39,502 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 137 transitions, 290 flow [2023-11-12 02:21:39,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 137 transitions, 290 flow [2023-11-12 02:21:39,536 INFO L124 PetriNetUnfolderBase]: 37/247 cut-off events. [2023-11-12 02:21:39,537 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:21:39,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 247 events. 37/247 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 750 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2023-11-12 02:21:39,548 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-11-12 02:21:42,366 INFO L134 LiptonReduction]: Checked pairs total: 17336 [2023-11-12 02:21:42,367 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-11-12 02:21:42,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:42,376 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6f0c1681, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:42,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:21:42,381 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:21:42,382 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-12 02:21:42,382 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:42,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:42,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:21:42,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:42,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:42,389 INFO L85 PathProgramCache]: Analyzing trace with hash 652401258, now seen corresponding path program 1 times [2023-11-12 02:21:42,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:42,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910129953] [2023-11-12 02:21:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:42,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:42,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:42,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910129953] [2023-11-12 02:21:42,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910129953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:42,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:42,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:21:42,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866791193] [2023-11-12 02:21:42,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:42,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:42,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:42,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:42,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:42,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 236 [2023-11-12 02:21:42,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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) [2023-11-12 02:21:42,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:42,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 236 [2023-11-12 02:21:42,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:42,993 INFO L124 PetriNetUnfolderBase]: 1665/2829 cut-off events. [2023-11-12 02:21:42,993 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-12 02:21:42,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5553 conditions, 2829 events. 1665/2829 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 15922 event pairs, 1331 based on Foata normal form. 442/2906 useless extension candidates. Maximal degree in co-relation 2459. Up to 2666 conditions per place. [2023-11-12 02:21:43,010 INFO L140 encePairwiseOnDemand]: 219/236 looper letters, 32 selfloop transitions, 2 changer transitions 9/52 dead transitions. [2023-11-12 02:21:43,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 204 flow [2023-11-12 02:21:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:43,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:21:43,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-11-12 02:21:43,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466101694915254 [2023-11-12 02:21:43,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-11-12 02:21:43,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-11-12 02:21:43,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:43,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-11-12 02:21:43,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2023-11-12 02:21:43,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 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) [2023-11-12 02:21:43,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 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) [2023-11-12 02:21:43,020 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 130 flow. Second operand 3 states and 387 transitions. [2023-11-12 02:21:43,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 204 flow [2023-11-12 02:21:43,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:21:43,025 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 90 flow [2023-11-12 02:21:43,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-11-12 02:21:43,026 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-11-12 02:21:43,026 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 90 flow [2023-11-12 02:21:43,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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) [2023-11-12 02:21:43,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:43,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:43,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:21:43,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:43,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:43,029 INFO L85 PathProgramCache]: Analyzing trace with hash -772306546, now seen corresponding path program 1 times [2023-11-12 02:21:43,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:43,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666023941] [2023-11-12 02:21:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:43,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:43,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:43,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666023941] [2023-11-12 02:21:43,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666023941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:43,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104357583] [2023-11-12 02:21:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:43,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:43,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:43,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:43,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:21:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:43,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:21:43,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:43,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:43,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104357583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:43,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:21:43,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:21:43,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931924872] [2023-11-12 02:21:43,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:43,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:43,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:43,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:43,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:43,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 236 [2023-11-12 02:21:43,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 109.42857142857143) internal successors, (766), 7 states have internal predecessors, (766), 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) [2023-11-12 02:21:43,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:43,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 236 [2023-11-12 02:21:43,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:43,642 INFO L124 PetriNetUnfolderBase]: 331/671 cut-off events. [2023-11-12 02:21:43,642 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-11-12 02:21:43,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 671 events. 331/671 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3392 event pairs, 50 based on Foata normal form. 80/748 useless extension candidates. Maximal degree in co-relation 959. Up to 398 conditions per place. [2023-11-12 02:21:43,649 INFO L140 encePairwiseOnDemand]: 233/236 looper letters, 42 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-11-12 02:21:43,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 216 flow [2023-11-12 02:21:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:21:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:21:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 582 transitions. [2023-11-12 02:21:43,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49322033898305084 [2023-11-12 02:21:43,654 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 582 transitions. [2023-11-12 02:21:43,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 582 transitions. [2023-11-12 02:21:43,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:43,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 582 transitions. [2023-11-12 02:21:43,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 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) [2023-11-12 02:21:43,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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) [2023-11-12 02:21:43,663 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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) [2023-11-12 02:21:43,663 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 90 flow. Second operand 5 states and 582 transitions. [2023-11-12 02:21:43,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 216 flow [2023-11-12 02:21:43,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:21:43,667 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-12 02:21:43,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-12 02:21:43,668 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2023-11-12 02:21:43,669 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-12 02:21:43,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.42857142857143) internal successors, (766), 7 states have internal predecessors, (766), 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) [2023-11-12 02:21:43,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:43,670 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:21:43,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:21:43,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:43,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:43,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:43,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1790711191, now seen corresponding path program 1 times [2023-11-12 02:21:43,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:43,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62392111] [2023-11-12 02:21:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:43,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:43,914 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:21:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:43,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:21:43,957 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:21:43,958 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:21:43,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:21:43,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:21:43,960 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:21:43,961 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:21:43,961 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:21:43,995 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:21:44,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 167 transitions, 361 flow [2023-11-12 02:21:44,063 INFO L124 PetriNetUnfolderBase]: 58/380 cut-off events. [2023-11-12 02:21:44,063 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:21:44,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 380 events. 58/380 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1276 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 255. Up to 16 conditions per place. [2023-11-12 02:21:44,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 167 transitions, 361 flow [2023-11-12 02:21:44,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 167 transitions, 361 flow [2023-11-12 02:21:44,072 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:44,072 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 167 transitions, 361 flow [2023-11-12 02:21:44,073 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 167 transitions, 361 flow [2023-11-12 02:21:44,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 167 transitions, 361 flow [2023-11-12 02:21:44,127 INFO L124 PetriNetUnfolderBase]: 58/380 cut-off events. [2023-11-12 02:21:44,127 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:21:44,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 380 events. 58/380 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1276 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 255. Up to 16 conditions per place. [2023-11-12 02:21:44,149 INFO L119 LiptonReduction]: Number of co-enabled transitions 13944 [2023-11-12 02:21:47,066 INFO L134 LiptonReduction]: Checked pairs total: 34015 [2023-11-12 02:21:47,067 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-11-12 02:21:47,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:47,070 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6f0c1681, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:47,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:21:47,073 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:21:47,073 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-12 02:21:47,073 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:47,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:47,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:21:47,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:47,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:47,075 INFO L85 PathProgramCache]: Analyzing trace with hash 949070607, now seen corresponding path program 1 times [2023-11-12 02:21:47,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:47,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819824067] [2023-11-12 02:21:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:47,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:47,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:47,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819824067] [2023-11-12 02:21:47,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819824067] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:47,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:47,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:21:47,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297680123] [2023-11-12 02:21:47,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:47,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:47,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:47,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 281 [2023-11-12 02:21:47,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 77 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 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) [2023-11-12 02:21:47,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:47,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 281 [2023-11-12 02:21:47,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:51,506 INFO L124 PetriNetUnfolderBase]: 21048/31609 cut-off events. [2023-11-12 02:21:51,506 INFO L125 PetriNetUnfolderBase]: For 867/867 co-relation queries the response was YES. [2023-11-12 02:21:51,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61823 conditions, 31609 events. 21048/31609 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 219102 event pairs, 19361 based on Foata normal form. 5728/33793 useless extension candidates. Maximal degree in co-relation 23156. Up to 29586 conditions per place. [2023-11-12 02:21:51,722 INFO L140 encePairwiseOnDemand]: 257/281 looper letters, 41 selfloop transitions, 2 changer transitions 10/66 dead transitions. [2023-11-12 02:21:51,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 66 transitions, 263 flow [2023-11-12 02:21:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:21:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-11-12 02:21:51,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575326215895611 [2023-11-12 02:21:51,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-11-12 02:21:51,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-11-12 02:21:51,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:51,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-11-12 02:21:51,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2023-11-12 02:21:51,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 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) [2023-11-12 02:21:51,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 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) [2023-11-12 02:21:51,733 INFO L175 Difference]: Start difference. First operand has 59 places, 77 transitions, 181 flow. Second operand 3 states and 470 transitions. [2023-11-12 02:21:51,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 66 transitions, 263 flow [2023-11-12 02:21:51,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 66 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:21:51,739 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 122 flow [2023-11-12 02:21:51,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-11-12 02:21:51,743 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-11-12 02:21:51,744 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 122 flow [2023-11-12 02:21:51,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 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) [2023-11-12 02:21:51,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:51,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:51,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:21:51,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:51,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1403682126, now seen corresponding path program 1 times [2023-11-12 02:21:51,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:51,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434380705] [2023-11-12 02:21:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:51,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:51,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:51,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434380705] [2023-11-12 02:21:51,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434380705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313797455] [2023-11-12 02:21:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:51,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:51,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:51,829 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:51,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:21:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:51,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:21:51,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:51,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:51,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313797455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:51,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:21:51,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:21:51,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335830446] [2023-11-12 02:21:51,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:51,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:51,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:51,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:52,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 281 [2023-11-12 02:21:52,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 131.42857142857142) internal successors, (920), 7 states have internal predecessors, (920), 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) [2023-11-12 02:21:52,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:52,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 281 [2023-11-12 02:21:52,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:53,049 INFO L124 PetriNetUnfolderBase]: 4372/7213 cut-off events. [2023-11-12 02:21:53,049 INFO L125 PetriNetUnfolderBase]: For 2430/2430 co-relation queries the response was YES. [2023-11-12 02:21:53,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14585 conditions, 7213 events. 4372/7213 cut-off events. For 2430/2430 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 47044 event pairs, 828 based on Foata normal form. 657/7779 useless extension candidates. Maximal degree in co-relation 1663. Up to 4122 conditions per place. [2023-11-12 02:21:53,118 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 75 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2023-11-12 02:21:53,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 92 transitions, 370 flow [2023-11-12 02:21:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:21:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:21:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 856 transitions. [2023-11-12 02:21:53,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077105575326216 [2023-11-12 02:21:53,124 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 856 transitions. [2023-11-12 02:21:53,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 856 transitions. [2023-11-12 02:21:53,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:53,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 856 transitions. [2023-11-12 02:21:53,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 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) [2023-11-12 02:21:53,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 281.0) internal successors, (1967), 7 states have internal predecessors, (1967), 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) [2023-11-12 02:21:53,136 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 281.0) internal successors, (1967), 7 states have internal predecessors, (1967), 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) [2023-11-12 02:21:53,137 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 122 flow. Second operand 6 states and 856 transitions. [2023-11-12 02:21:53,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 92 transitions, 370 flow [2023-11-12 02:21:53,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 92 transitions, 366 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:21:53,142 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-12 02:21:53,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-12 02:21:53,143 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-11-12 02:21:53,144 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-12 02:21:53,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.42857142857142) internal successors, (920), 7 states have internal predecessors, (920), 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) [2023-11-12 02:21:53,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:53,145 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:21:53,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:53,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c087e283-ce4f-4b41-bece-191fb332224c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:53,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:53,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash 776941429, now seen corresponding path program 1 times [2023-11-12 02:21:53,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:53,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474583020] [2023-11-12 02:21:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:53,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:53,374 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:21:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:21:53,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:21:53,396 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:21:53,396 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:21:53,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:21:53,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:21:53,397 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:21:53,398 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:21:53,398 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:21:53,429 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:21:53,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 197 transitions, 434 flow [2023-11-12 02:21:53,555 INFO L124 PetriNetUnfolderBase]: 91/585 cut-off events. [2023-11-12 02:21:53,555 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:21:53,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 585 events. 91/585 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2260 event pairs, 6 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 400. Up to 32 conditions per place. [2023-11-12 02:21:53,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 197 transitions, 434 flow [2023-11-12 02:21:53,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 197 transitions, 434 flow [2023-11-12 02:21:53,571 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:53,571 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 197 transitions, 434 flow [2023-11-12 02:21:53,572 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 197 transitions, 434 flow [2023-11-12 02:21:53,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 197 transitions, 434 flow [2023-11-12 02:21:53,700 INFO L124 PetriNetUnfolderBase]: 91/585 cut-off events. [2023-11-12 02:21:53,700 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:21:53,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 585 events. 91/585 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2260 event pairs, 6 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 400. Up to 32 conditions per place. [2023-11-12 02:21:53,744 INFO L119 LiptonReduction]: Number of co-enabled transitions 22064 [2023-11-12 02:21:56,920 INFO L134 LiptonReduction]: Checked pairs total: 59314 [2023-11-12 02:21:56,922 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-11-12 02:21:56,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:56,924 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6f0c1681, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:56,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:21:56,927 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:21:56,927 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-12 02:21:56,927 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:56,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:56,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:21:56,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:21:56,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:56,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1288773026, now seen corresponding path program 1 times [2023-11-12 02:21:56,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:56,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922545001] [2023-11-12 02:21:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:56,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:56,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922545001] [2023-11-12 02:21:56,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922545001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:56,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:56,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:21:56,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798917974] [2023-11-12 02:21:56,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:56,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:56,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:56,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 326 [2023-11-12 02:21:57,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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) [2023-11-12 02:21:57,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:57,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 326 [2023-11-12 02:21:57,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand