./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:54:04,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:54:04,690 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:54:04,709 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:54:04,710 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:54:04,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:54:04,752 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:54:04,753 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:54:04,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:54:04,763 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:54:04,763 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:54:04,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:54:04,765 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:54:04,766 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:54:04,767 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:54:04,767 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:54:04,767 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:54:04,768 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:54:04,768 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:54:04,768 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:54:04,769 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:54:04,769 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:54:04,770 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:54:04,770 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:54:04,770 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:54:04,771 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:54:04,772 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:54:04,772 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:54:04,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:54:04,773 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:54:04,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:54:04,774 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:54:04,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:54:04,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:54:04,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:54:04,775 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:54:04,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:54:04,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:54:04,775 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:54:04,776 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_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 [2023-11-06 21:54:05,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:54:05,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:54:05,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:54:05,166 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:54:05,167 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:54:05,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-11-06 21:54:08,194 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:54:08,486 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:54:08,501 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-11-06 21:54:08,522 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/data/4b0c60dc7/f638a699d0e24d948fc95ab242369c83/FLAG3959ae108 [2023-11-06 21:54:08,536 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/data/4b0c60dc7/f638a699d0e24d948fc95ab242369c83 [2023-11-06 21:54:08,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:54:08,541 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:54:08,542 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:54:08,543 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:54:08,548 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:54:08,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:08" (1/1) ... [2023-11-06 21:54:08,551 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5296416c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:08, skipping insertion in model container [2023-11-06 21:54:08,551 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:08" (1/1) ... [2023-11-06 21:54:08,601 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:54:09,025 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_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2023-11-06 21:54:09,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:54:09,077 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:54:09,110 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_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2023-11-06 21:54:09,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:54:09,165 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:54:09,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09 WrapperNode [2023-11-06 21:54:09,166 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:54:09,168 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:54:09,168 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:54:09,168 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:54:09,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,244 INFO L138 Inliner]: procedures = 171, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 131 [2023-11-06 21:54:09,244 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:54:09,245 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:54:09,246 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:54:09,247 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:54:09,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,274 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,276 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,285 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,310 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,326 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:54:09,327 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:54:09,327 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:54:09,327 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:54:09,328 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (1/1) ... [2023-11-06 21:54:09,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:54:09,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:09,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:54:09,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:54:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:54:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:54:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 21:54:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:54:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:54:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 21:54:09,425 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 21:54:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:54:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-11-06 21:54:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:54:09,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:54:09,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:54:09,429 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:54:09,623 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:54:09,625 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:54:09,945 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:54:09,954 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:54:09,954 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-06 21:54:09,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:09 BoogieIcfgContainer [2023-11-06 21:54:09,957 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:54:09,960 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:54:09,960 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:54:09,964 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:54:09,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:54:08" (1/3) ... [2023-11-06 21:54:09,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4ead65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:09, skipping insertion in model container [2023-11-06 21:54:09,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:09" (2/3) ... [2023-11-06 21:54:09,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4ead65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:09, skipping insertion in model container [2023-11-06 21:54:09,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:09" (3/3) ... [2023-11-06 21:54:09,967 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2023-11-06 21:54:09,977 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:54:09,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:54:09,996 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-06 21:54:09,996 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:54:10,092 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 21:54:10,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 194 transitions, 395 flow [2023-11-06 21:54:10,248 INFO L124 PetriNetUnfolderBase]: 45/290 cut-off events. [2023-11-06 21:54:10,249 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:54:10,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 290 events. 45/290 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1139 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 154. Up to 6 conditions per place. [2023-11-06 21:54:10,257 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 194 transitions, 395 flow [2023-11-06 21:54:10,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 189 transitions, 382 flow [2023-11-06 21:54:10,277 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:54:10,292 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 189 transitions, 382 flow [2023-11-06 21:54:10,295 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 189 transitions, 382 flow [2023-11-06 21:54:10,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 189 transitions, 382 flow [2023-11-06 21:54:10,351 INFO L124 PetriNetUnfolderBase]: 44/285 cut-off events. [2023-11-06 21:54:10,352 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:54:10,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 285 events. 44/285 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1120 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 154. Up to 6 conditions per place. [2023-11-06 21:54:10,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 10812 [2023-11-06 21:54:15,179 INFO L134 LiptonReduction]: Checked pairs total: 22104 [2023-11-06 21:54:15,179 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-11-06 21:54:15,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:15,203 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d855f2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:15,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 21:54:15,209 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:54:15,209 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-11-06 21:54:15,209 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:54:15,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:15,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 21:54:15,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 21:54:15,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash 22959209, now seen corresponding path program 1 times [2023-11-06 21:54:15,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:15,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461378261] [2023-11-06 21:54:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:15,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:15,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:15,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461378261] [2023-11-06 21:54:15,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461378261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:15,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:15,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:54:15,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530209431] [2023-11-06 21:54:15,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:15,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:15,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:15,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:15,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:15,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 350 [2023-11-06 21:54:15,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 73 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:15,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:15,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 350 [2023-11-06 21:54:15,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:15,892 INFO L124 PetriNetUnfolderBase]: 361/821 cut-off events. [2023-11-06 21:54:15,892 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:54:15,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 821 events. 361/821 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3985 event pairs, 308 based on Foata normal form. 127/832 useless extension candidates. Maximal degree in co-relation 1560. Up to 730 conditions per place. [2023-11-06 21:54:15,900 INFO L140 encePairwiseOnDemand]: 324/350 looper letters, 50 selfloop transitions, 2 changer transitions 5/65 dead transitions. [2023-11-06 21:54:15,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 248 flow [2023-11-06 21:54:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:15,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-11-06 21:54:15,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2023-11-06 21:54:15,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-11-06 21:54:15,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-11-06 21:54:15,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:15,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-11-06 21:54:15,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:15,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:15,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:15,940 INFO L175 Difference]: Start difference. First operand has 53 places, 73 transitions, 150 flow. Second operand 3 states and 558 transitions. [2023-11-06 21:54:15,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 248 flow [2023-11-06 21:54:15,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 21:54:15,947 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 100 flow [2023-11-06 21:54:15,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-11-06 21:54:15,953 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2023-11-06 21:54:15,953 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 100 flow [2023-11-06 21:54:15,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:15,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:15,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 21:54:15,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:54:15,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 21:54:15,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash 586985229, now seen corresponding path program 1 times [2023-11-06 21:54:15,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:15,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611281537] [2023-11-06 21:54:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:15,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:54:15,989 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:54:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:54:16,031 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:54:16,031 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:54:16,033 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 21:54:16,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 21:54:16,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 21:54:16,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 21:54:16,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 21:54:16,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:54:16,037 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 21:54:16,040 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 21:54:16,040 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 21:54:16,093 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 21:54:16,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 249 transitions, 514 flow [2023-11-06 21:54:16,192 INFO L124 PetriNetUnfolderBase]: 76/467 cut-off events. [2023-11-06 21:54:16,193 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:54:16,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 467 events. 76/467 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2093 event pairs, 0 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 292. Up to 9 conditions per place. [2023-11-06 21:54:16,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 249 transitions, 514 flow [2023-11-06 21:54:16,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 249 transitions, 514 flow [2023-11-06 21:54:16,207 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:54:16,208 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 249 transitions, 514 flow [2023-11-06 21:54:16,209 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 249 transitions, 514 flow [2023-11-06 21:54:16,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 249 transitions, 514 flow [2023-11-06 21:54:16,286 INFO L124 PetriNetUnfolderBase]: 76/467 cut-off events. [2023-11-06 21:54:16,286 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:54:16,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 467 events. 76/467 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2093 event pairs, 0 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 292. Up to 9 conditions per place. [2023-11-06 21:54:16,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 28408 [2023-11-06 21:54:20,730 INFO L134 LiptonReduction]: Checked pairs total: 73790 [2023-11-06 21:54:20,730 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-11-06 21:54:20,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:20,734 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d855f2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:20,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 21:54:20,738 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:54:20,738 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-06 21:54:20,738 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:54:20,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:20,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 21:54:20,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 21:54:20,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash 37796070, now seen corresponding path program 1 times [2023-11-06 21:54:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:20,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921465638] [2023-11-06 21:54:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:20,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:20,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:20,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921465638] [2023-11-06 21:54:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921465638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:20,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:20,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:54:20,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550738483] [2023-11-06 21:54:20,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:20,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:20,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:20,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 427 [2023-11-06 21:54:20,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 112 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:20,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:20,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 427 [2023-11-06 21:54:20,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:23,853 INFO L124 PetriNetUnfolderBase]: 11989/20701 cut-off events. [2023-11-06 21:54:23,854 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-06 21:54:23,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39392 conditions, 20701 events. 11989/20701 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 154641 event pairs, 11278 based on Foata normal form. 4809/23360 useless extension candidates. Maximal degree in co-relation 32784. Up to 18586 conditions per place. [2023-11-06 21:54:24,077 INFO L140 encePairwiseOnDemand]: 392/427 looper letters, 67 selfloop transitions, 2 changer transitions 9/97 dead transitions. [2023-11-06 21:54:24,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 97 transitions, 364 flow [2023-11-06 21:54:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-11-06 21:54:24,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542544886807181 [2023-11-06 21:54:24,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-11-06 21:54:24,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-11-06 21:54:24,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:24,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-11-06 21:54:24,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,092 INFO L175 Difference]: Start difference. First operand has 82 places, 112 transitions, 240 flow. Second operand 3 states and 710 transitions. [2023-11-06 21:54:24,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 97 transitions, 364 flow [2023-11-06 21:54:24,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 97 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 21:54:24,101 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 164 flow [2023-11-06 21:54:24,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-11-06 21:54:24,102 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2023-11-06 21:54:24,102 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 164 flow [2023-11-06 21:54:24,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:24,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:24,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:54:24,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 21:54:24,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:24,105 INFO L85 PathProgramCache]: Analyzing trace with hash 646461621, now seen corresponding path program 1 times [2023-11-06 21:54:24,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:24,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818950834] [2023-11-06 21:54:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:24,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:24,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:24,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818950834] [2023-11-06 21:54:24,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818950834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126246390] [2023-11-06 21:54:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:24,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:24,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:24,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:24,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:54:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:24,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:54:24,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:24,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:24,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126246390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:24,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:24,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 21:54:24,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68676834] [2023-11-06 21:54:24,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:24,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:24,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:24,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:24,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:24,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 427 [2023-11-06 21:54:24,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 197.28571428571428) internal successors, (1381), 7 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:24,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 427 [2023-11-06 21:54:24,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:24,836 INFO L124 PetriNetUnfolderBase]: 1230/2399 cut-off events. [2023-11-06 21:54:24,836 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2023-11-06 21:54:24,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4792 conditions, 2399 events. 1230/2399 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14166 event pairs, 198 based on Foata normal form. 272/2665 useless extension candidates. Maximal degree in co-relation 1977. Up to 1472 conditions per place. [2023-11-06 21:54:24,852 INFO L140 encePairwiseOnDemand]: 424/427 looper letters, 80 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2023-11-06 21:54:24,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 382 flow [2023-11-06 21:54:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:54:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:54:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1060 transitions. [2023-11-06 21:54:24,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4964871194379391 [2023-11-06 21:54:24,857 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1060 transitions. [2023-11-06 21:54:24,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1060 transitions. [2023-11-06 21:54:24,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:24,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1060 transitions. [2023-11-06 21:54:24,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 427.0) internal successors, (2562), 6 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,869 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 427.0) internal successors, (2562), 6 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,869 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 164 flow. Second operand 5 states and 1060 transitions. [2023-11-06 21:54:24,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 382 flow [2023-11-06 21:54:24,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:54:24,873 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 126 flow [2023-11-06 21:54:24,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-11-06 21:54:24,875 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -20 predicate places. [2023-11-06 21:54:24,875 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 126 flow [2023-11-06 21:54:24,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 197.28571428571428) internal successors, (1381), 7 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:24,876 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 21:54:24,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:25,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa2b245-2c91-411d-aeb7-3b0472ab33aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:25,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 21:54:25,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash -159075067, now seen corresponding path program 1 times [2023-11-06 21:54:25,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:25,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982813182] [2023-11-06 21:54:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:25,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:54:25,122 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:54:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:54:25,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:54:25,161 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:54:25,164 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 21:54:25,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 21:54:25,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 21:54:25,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 21:54:25,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 21:54:25,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:54:25,166 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 21:54:25,166 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 21:54:25,167 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 21:54:25,219 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 21:54:25,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 304 transitions, 635 flow [2023-11-06 21:54:25,330 INFO L124 PetriNetUnfolderBase]: 112/679 cut-off events. [2023-11-06 21:54:25,331 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 21:54:25,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 679 events. 112/679 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3169 event pairs, 1 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 475. Up to 16 conditions per place. [2023-11-06 21:54:25,341 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 304 transitions, 635 flow [2023-11-06 21:54:25,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 304 transitions, 635 flow [2023-11-06 21:54:25,349 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:54:25,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 304 transitions, 635 flow [2023-11-06 21:54:25,350 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 304 transitions, 635 flow [2023-11-06 21:54:25,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 304 transitions, 635 flow [2023-11-06 21:54:25,486 INFO L124 PetriNetUnfolderBase]: 112/679 cut-off events. [2023-11-06 21:54:25,486 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 21:54:25,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 679 events. 112/679 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3169 event pairs, 1 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 475. Up to 16 conditions per place. [2023-11-06 21:54:25,533 INFO L119 LiptonReduction]: Number of co-enabled transitions 51516 [2023-11-06 21:54:30,419 INFO L134 LiptonReduction]: Checked pairs total: 145620 [2023-11-06 21:54:30,419 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-11-06 21:54:30,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:30,423 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d855f2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:30,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 21:54:30,426 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:54:30,426 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-06 21:54:30,426 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:54:30,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:30,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 21:54:30,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 21:54:30,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:30,428 INFO L85 PathProgramCache]: Analyzing trace with hash 55157472, now seen corresponding path program 1 times [2023-11-06 21:54:30,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:30,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253116058] [2023-11-06 21:54:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:30,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:30,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:30,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253116058] [2023-11-06 21:54:30,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253116058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:30,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:30,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:54:30,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135172488] [2023-11-06 21:54:30,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:30,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:30,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:30,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 509 [2023-11-06 21:54:30,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 153 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:30,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:30,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 509 [2023-11-06 21:54:30,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand