./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.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_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/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_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/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_19859b55-6f38-4027-95b8-e381326ca490/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 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:13:48,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:13:48,866 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:13:48,874 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:13:48,875 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:13:48,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:13:48,917 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:13:48,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:13:48,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:13:48,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:13:48,926 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:13:48,926 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:13:48,927 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:13:48,928 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:13:48,929 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:13:48,929 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:13:48,930 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:13:48,930 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:13:48,931 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:13:48,931 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:13:48,932 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:13:48,932 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:13:48,933 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:13:48,934 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:13:48,935 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:13:48,936 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:13:48,937 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:13:48,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:13:48,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:13:48,939 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:13:48,940 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:13:48,940 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:13:48,941 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:13:48,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:13:48,941 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:13:48,942 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:13:48,942 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:13:48,942 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:13:48,942 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:13:48,943 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_19859b55-6f38-4027-95b8-e381326ca490/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df [2023-11-06 22:13:49,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:13:49,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:13:49,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:13:49,367 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:13:49,368 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:13:49,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2023-11-06 22:13:52,647 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:13:53,057 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:13:53,058 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2023-11-06 22:13:53,077 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/data/23e4d156d/a78ef167822546a289db5cdde5e1e1af/FLAG6681cb0b5 [2023-11-06 22:13:53,098 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/data/23e4d156d/a78ef167822546a289db5cdde5e1e1af [2023-11-06 22:13:53,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:13:53,107 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:13:53,110 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:13:53,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:13:53,116 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:13:53,117 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f3ecad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53, skipping insertion in model container [2023-11-06 22:13:53,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,189 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:13:53,615 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_19859b55-6f38-4027-95b8-e381326ca490/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2023-11-06 22:13:53,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:13:53,670 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:13:53,729 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_19859b55-6f38-4027-95b8-e381326ca490/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2023-11-06 22:13:53,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:13:53,802 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:13:53,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53 WrapperNode [2023-11-06 22:13:53,803 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:13:53,804 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:13:53,805 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:13:53,805 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:13:53,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,875 INFO L138 Inliner]: procedures = 170, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-11-06 22:13:53,876 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:13:53,877 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:13:53,877 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:13:53,877 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:13:53,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,902 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,940 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,958 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:13:53,959 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:13:53,959 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:13:53,959 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:13:53,960 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (1/1) ... [2023-11-06 22:13:53,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:13:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:53,999 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:13:54,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:13:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:13:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:13:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:13:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:13:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:13:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:13:54,036 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:13:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:13:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:13:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:13:54,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:13:54,039 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:13:54,240 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:13:54,243 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:13:54,500 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:13:54,510 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:13:54,511 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-06 22:13:54,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:54 BoogieIcfgContainer [2023-11-06 22:13:54,514 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:13:54,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:13:54,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:13:54,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:13:54,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:13:53" (1/3) ... [2023-11-06 22:13:54,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a387eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:54, skipping insertion in model container [2023-11-06 22:13:54,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53" (2/3) ... [2023-11-06 22:13:54,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a387eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:54, skipping insertion in model container [2023-11-06 22:13:54,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:54" (3/3) ... [2023-11-06 22:13:54,525 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2023-11-06 22:13:54,536 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:13:54,553 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:13:54,553 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:13:54,554 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:13:54,626 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:13:54,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 119 transitions, 245 flow [2023-11-06 22:13:54,785 INFO L124 PetriNetUnfolderBase]: 17/159 cut-off events. [2023-11-06 22:13:54,785 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:13:54,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 159 events. 17/159 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 390 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-06 22:13:54,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 119 transitions, 245 flow [2023-11-06 22:13:54,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 114 transitions, 232 flow [2023-11-06 22:13:54,805 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:13:54,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 114 transitions, 232 flow [2023-11-06 22:13:54,824 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 114 transitions, 232 flow [2023-11-06 22:13:54,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 114 transitions, 232 flow [2023-11-06 22:13:54,875 INFO L124 PetriNetUnfolderBase]: 16/154 cut-off events. [2023-11-06 22:13:54,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:13:54,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 154 events. 16/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 371 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-06 22:13:54,882 INFO L119 LiptonReduction]: Number of co-enabled transitions 3036 [2023-11-06 22:13:59,611 INFO L134 LiptonReduction]: Checked pairs total: 5184 [2023-11-06 22:13:59,613 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-11-06 22:13:59,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:13:59,644 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;@409a621e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:13:59,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:13:59,650 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:13:59,650 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-06 22:13:59,650 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:13:59,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:59,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:13:59,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:59,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:59,659 INFO L85 PathProgramCache]: Analyzing trace with hash 13924933, now seen corresponding path program 1 times [2023-11-06 22:13:59,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:59,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162018367] [2023-11-06 22:13:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:59,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:00,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:00,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162018367] [2023-11-06 22:14:00,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162018367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:14:00,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:14:00,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:14:00,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900132355] [2023-11-06 22:14:00,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:14:00,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:14:00,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:00,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:14:00,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:14:00,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 217 [2023-11-06 22:14:00,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:00,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 217 [2023-11-06 22:14:00,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:00,247 INFO L124 PetriNetUnfolderBase]: 80/188 cut-off events. [2023-11-06 22:14:00,247 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:14:00,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 188 events. 80/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 621 event pairs, 63 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 361. Up to 169 conditions per place. [2023-11-06 22:14:00,253 INFO L140 encePairwiseOnDemand]: 205/217 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-11-06 22:14:00,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 134 flow [2023-11-06 22:14:00,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:14:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:14:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-11-06 22:14:00,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284178187403994 [2023-11-06 22:14:00,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-11-06 22:14:00,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-11-06 22:14:00,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:00,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-11-06 22:14:00,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,298 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 68 flow. Second operand 3 states and 344 transitions. [2023-11-06 22:14:00,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 134 flow [2023-11-06 22:14:00,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:14:00,304 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 50 flow [2023-11-06 22:14:00,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-11-06 22:14:00,309 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-11-06 22:14:00,310 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 50 flow [2023-11-06 22:14:00,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:00,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:14:00,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:14:00,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:00,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:00,326 INFO L85 PathProgramCache]: Analyzing trace with hash 494972661, now seen corresponding path program 1 times [2023-11-06 22:14:00,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:00,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105054720] [2023-11-06 22:14:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:00,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:14:00,399 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:14:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:14:00,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:14:00,464 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:14:00,466 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 22:14:00,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 22:14:00,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:14:00,468 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:14:00,472 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:14:00,472 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:14:00,515 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:14:00,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 154 transitions, 324 flow [2023-11-06 22:14:00,580 INFO L124 PetriNetUnfolderBase]: 31/260 cut-off events. [2023-11-06 22:14:00,580 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:14:00,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 260 events. 31/260 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 819 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-11-06 22:14:00,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 154 transitions, 324 flow [2023-11-06 22:14:00,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 154 transitions, 324 flow [2023-11-06 22:14:00,590 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:14:00,590 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 154 transitions, 324 flow [2023-11-06 22:14:00,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 154 transitions, 324 flow [2023-11-06 22:14:00,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 154 transitions, 324 flow [2023-11-06 22:14:00,629 INFO L124 PetriNetUnfolderBase]: 31/260 cut-off events. [2023-11-06 22:14:00,629 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:14:00,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 260 events. 31/260 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 819 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-11-06 22:14:00,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 8976 [2023-11-06 22:14:04,521 INFO L134 LiptonReduction]: Checked pairs total: 17363 [2023-11-06 22:14:04,521 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-11-06 22:14:04,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:14:04,534 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;@409a621e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:14:04,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:14:04,537 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:14:04,537 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:14:04,537 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:14:04,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:04,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:14:04,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:04,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:04,539 INFO L85 PathProgramCache]: Analyzing trace with hash 23467473, now seen corresponding path program 1 times [2023-11-06 22:14:04,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:04,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659525178] [2023-11-06 22:14:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:04,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:04,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:04,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659525178] [2023-11-06 22:14:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659525178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:14:04,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:14:04,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:14:04,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17267616] [2023-11-06 22:14:04,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:14:04,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:14:04,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:14:04,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:14:04,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 275 [2023-11-06 22:14:04,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:04,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:04,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 275 [2023-11-06 22:14:04,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:05,100 INFO L124 PetriNetUnfolderBase]: 1642/2949 cut-off events. [2023-11-06 22:14:05,100 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:14:05,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5685 conditions, 2949 events. 1642/2949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 17509 event pairs, 752 based on Foata normal form. 428/3078 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2023-11-06 22:14:05,118 INFO L140 encePairwiseOnDemand]: 258/275 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2023-11-06 22:14:05,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 202 flow [2023-11-06 22:14:05,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:14:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:14:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-11-06 22:14:05,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345454545454545 [2023-11-06 22:14:05,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-11-06 22:14:05,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-11-06 22:14:05,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:05,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-11-06 22:14:05,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,135 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 126 flow. Second operand 3 states and 441 transitions. [2023-11-06 22:14:05,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 202 flow [2023-11-06 22:14:05,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:14:05,140 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-11-06 22:14:05,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-11-06 22:14:05,142 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-06 22:14:05,142 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-11-06 22:14:05,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:05,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:05,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:14:05,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:05,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:05,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2063932720, now seen corresponding path program 1 times [2023-11-06 22:14:05,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:05,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216565590] [2023-11-06 22:14:05,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:05,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:05,281 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 22:14:05,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:05,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216565590] [2023-11-06 22:14:05,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216565590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:05,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878859775] [2023-11-06 22:14:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:05,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:05,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:05,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:05,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:14:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:05,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:14:05,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:05,477 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 22:14:05,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:05,510 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 22:14:05,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878859775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:05,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:05,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:14:05,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278597585] [2023-11-06 22:14:05,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:05,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:14:05,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:14:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:14:05,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 275 [2023-11-06 22:14:05,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 127.28571428571429) internal successors, (891), 7 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:05,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 275 [2023-11-06 22:14:05,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:05,791 INFO L124 PetriNetUnfolderBase]: 376/769 cut-off events. [2023-11-06 22:14:05,791 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-11-06 22:14:05,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3927 event pairs, 0 based on Foata normal form. 90/858 useless extension candidates. Maximal degree in co-relation 172. Up to 450 conditions per place. [2023-11-06 22:14:05,798 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-11-06 22:14:05,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 226 flow [2023-11-06 22:14:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:14:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:14:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 675 transitions. [2023-11-06 22:14:05,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-06 22:14:05,802 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 675 transitions. [2023-11-06 22:14:05,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 675 transitions. [2023-11-06 22:14:05,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:05,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 675 transitions. [2023-11-06 22:14:05,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,812 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,812 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 5 states and 675 transitions. [2023-11-06 22:14:05,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 226 flow [2023-11-06 22:14:05,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:14:05,815 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-06 22:14:05,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, 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} [2023-11-06 22:14:05,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-06 22:14:05,817 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-06 22:14:05,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 127.28571428571429) internal successors, (891), 7 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:05,818 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:14:05,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:06,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:06,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:06,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:06,025 INFO L85 PathProgramCache]: Analyzing trace with hash 56842742, now seen corresponding path program 1 times [2023-11-06 22:14:06,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:06,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648053907] [2023-11-06 22:14:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:06,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:14:06,047 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:14:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:14:06,067 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:14:06,068 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:14:06,068 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 22:14:06,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 22:14:06,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:14:06,069 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:14:06,070 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:14:06,070 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:14:06,111 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:14:06,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 189 transitions, 405 flow [2023-11-06 22:14:06,189 INFO L124 PetriNetUnfolderBase]: 50/396 cut-off events. [2023-11-06 22:14:06,190 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:14:06,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 396 events. 50/396 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1387 event pairs, 1 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 268. Up to 16 conditions per place. [2023-11-06 22:14:06,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 189 transitions, 405 flow [2023-11-06 22:14:06,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 189 transitions, 405 flow [2023-11-06 22:14:06,200 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:14:06,201 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 189 transitions, 405 flow [2023-11-06 22:14:06,201 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 189 transitions, 405 flow [2023-11-06 22:14:06,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 189 transitions, 405 flow [2023-11-06 22:14:06,266 INFO L124 PetriNetUnfolderBase]: 50/396 cut-off events. [2023-11-06 22:14:06,266 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:14:06,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 396 events. 50/396 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1387 event pairs, 1 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 268. Up to 16 conditions per place. [2023-11-06 22:14:06,294 INFO L119 LiptonReduction]: Number of co-enabled transitions 17028 [2023-11-06 22:14:11,007 INFO L134 LiptonReduction]: Checked pairs total: 39777 [2023-11-06 22:14:11,008 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-11-06 22:14:11,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:14:11,011 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;@409a621e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:14:11,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:14:11,014 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:14:11,014 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-06 22:14:11,014 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:14:11,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:11,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:14:11,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:11,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash 34671517, now seen corresponding path program 1 times [2023-11-06 22:14:11,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:11,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470509015] [2023-11-06 22:14:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:11,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:11,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470509015] [2023-11-06 22:14:11,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470509015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:14:11,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:14:11,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:14:11,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314629444] [2023-11-06 22:14:11,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:14:11,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:14:11,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:11,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:14:11,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:14:11,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 329 [2023-11-06 22:14:11,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:11,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:11,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 329 [2023-11-06 22:14:11,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:16,652 INFO L124 PetriNetUnfolderBase]: 32280/46590 cut-off events. [2023-11-06 22:14:16,653 INFO L125 PetriNetUnfolderBase]: For 1317/1317 co-relation queries the response was YES. [2023-11-06 22:14:16,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92738 conditions, 46590 events. 32280/46590 cut-off events. For 1317/1317 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 302997 event pairs, 21006 based on Foata normal form. 5103/47960 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-11-06 22:14:16,882 INFO L140 encePairwiseOnDemand]: 306/329 looper letters, 44 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2023-11-06 22:14:16,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 265 flow [2023-11-06 22:14:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:14:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:14:16,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-11-06 22:14:16,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481256332320162 [2023-11-06 22:14:16,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-11-06 22:14:16,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-11-06 22:14:16,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:16,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-11-06 22:14:16,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:16,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:16,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:16,893 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 175 flow. Second operand 3 states and 541 transitions. [2023-11-06 22:14:16,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 265 flow [2023-11-06 22:14:16,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 265 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:14:16,899 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 118 flow [2023-11-06 22:14:16,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-11-06 22:14:16,900 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-06 22:14:16,900 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 118 flow [2023-11-06 22:14:16,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:16,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:16,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:16,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:14:16,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:16,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:16,902 INFO L85 PathProgramCache]: Analyzing trace with hash -705110849, now seen corresponding path program 1 times [2023-11-06 22:14:16,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:16,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005724869] [2023-11-06 22:14:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:16,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:16,980 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 22:14:16,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:16,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005724869] [2023-11-06 22:14:16,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005724869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5975215] [2023-11-06 22:14:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:16,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:16,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:16,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:17,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:14:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:17,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:14:17,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:17,110 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 22:14:17,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:17,138 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 22:14:17,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5975215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:17,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:17,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:14:17,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923993214] [2023-11-06 22:14:17,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:17,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:14:17,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:14:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:14:17,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 329 [2023-11-06 22:14:17,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:17,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:17,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 329 [2023-11-06 22:14:17,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:18,639 INFO L124 PetriNetUnfolderBase]: 7582/12187 cut-off events. [2023-11-06 22:14:18,639 INFO L125 PetriNetUnfolderBase]: For 4374/4374 co-relation queries the response was YES. [2023-11-06 22:14:18,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24605 conditions, 12187 events. 7582/12187 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 81022 event pairs, 0 based on Foata normal form. 1098/13284 useless extension candidates. Maximal degree in co-relation 2808. Up to 7322 conditions per place. [2023-11-06 22:14:18,730 INFO L140 encePairwiseOnDemand]: 326/329 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2023-11-06 22:14:18,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 408 flow [2023-11-06 22:14:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:14:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:14:18,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1006 transitions. [2023-11-06 22:14:18,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096251266464032 [2023-11-06 22:14:18,749 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1006 transitions. [2023-11-06 22:14:18,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1006 transitions. [2023-11-06 22:14:18,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:18,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1006 transitions. [2023-11-06 22:14:18,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.66666666666666) internal successors, (1006), 6 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:18,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:18,763 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:18,763 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 118 flow. Second operand 6 states and 1006 transitions. [2023-11-06 22:14:18,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 408 flow [2023-11-06 22:14:18,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 404 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:14:18,773 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-06 22:14:18,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, 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} [2023-11-06 22:14:18,775 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-06 22:14:18,776 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-06 22:14:18,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:18,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:18,779 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:14:18,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:18,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19859b55-6f38-4027-95b8-e381326ca490/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:18,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:18,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:18,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2133276287, now seen corresponding path program 1 times [2023-11-06 22:14:18,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:18,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119496807] [2023-11-06 22:14:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:18,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:14:19,016 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:14:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:14:19,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:14:19,055 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:14:19,055 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 22:14:19,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 22:14:19,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:14:19,056 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:14:19,058 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:14:19,058 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:14:19,103 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:14:19,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 224 transitions, 488 flow [2023-11-06 22:14:19,188 INFO L124 PetriNetUnfolderBase]: 81/604 cut-off events. [2023-11-06 22:14:19,188 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:14:19,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 604 events. 81/604 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2427 event pairs, 6 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 416. Up to 32 conditions per place. [2023-11-06 22:14:19,196 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 224 transitions, 488 flow [2023-11-06 22:14:19,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 224 transitions, 488 flow [2023-11-06 22:14:19,201 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:14:19,201 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 224 transitions, 488 flow [2023-11-06 22:14:19,201 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 224 transitions, 488 flow [2023-11-06 22:14:19,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 224 transitions, 488 flow [2023-11-06 22:14:19,283 INFO L124 PetriNetUnfolderBase]: 81/604 cut-off events. [2023-11-06 22:14:19,284 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:14:19,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 604 events. 81/604 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2427 event pairs, 6 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 416. Up to 32 conditions per place. [2023-11-06 22:14:19,318 INFO L119 LiptonReduction]: Number of co-enabled transitions 27456 [2023-11-06 22:14:24,453 INFO L134 LiptonReduction]: Checked pairs total: 60776 [2023-11-06 22:14:24,454 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-11-06 22:14:24,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:14:24,457 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;@409a621e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:14:24,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:14:24,459 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:14:24,459 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:14:24,459 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:14:24,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:24,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:14:24,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:24,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:24,460 INFO L85 PathProgramCache]: Analyzing trace with hash 47601419, now seen corresponding path program 1 times [2023-11-06 22:14:24,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:24,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203213596] [2023-11-06 22:14:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:24,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:24,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:24,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203213596] [2023-11-06 22:14:24,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203213596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:14:24,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:14:24,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:14:24,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877719876] [2023-11-06 22:14:24,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:14:24,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:14:24,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:24,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:14:24,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:14:24,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 385 [2023-11-06 22:14:24,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:24,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:24,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 385 [2023-11-06 22:14:24,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand