./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/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_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/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_5484a5a1-3bda-4e2b-9ad5-c26208062435/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 b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:07:24,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:07:24,832 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:07:24,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:07:24,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:07:24,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:07:24,886 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:07:24,886 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:07:24,887 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:07:24,894 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:07:24,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:07:24,895 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:07:24,896 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:07:24,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:07:24,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:07:24,899 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:07:24,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:07:24,900 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:07:24,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:07:24,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:07:24,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:07:24,901 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:07:24,902 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:07:24,902 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:07:24,903 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:07:24,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:07:24,904 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:07:24,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:07:24,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:24,905 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:07:24,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:07:24,906 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:07:24,907 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:07:24,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:07:24,907 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:07:24,907 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:07:24,907 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:07:24,908 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:07:24,908 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:07:24,908 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_5484a5a1-3bda-4e2b-9ad5-c26208062435/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 [2023-11-06 23:07:25,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:07:25,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:07:25,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:07:25,263 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:07:25,264 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:07:25,265 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2023-11-06 23:07:28,623 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:07:28,933 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:07:28,934 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2023-11-06 23:07:28,957 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/data/52dd5a08f/b966845c3f0f48c2af4c3f019eaa4570/FLAGcae52b484 [2023-11-06 23:07:28,974 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/data/52dd5a08f/b966845c3f0f48c2af4c3f019eaa4570 [2023-11-06 23:07:28,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:07:28,988 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:07:28,989 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:28,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:07:28,999 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:07:29,000 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:29,001 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37890f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29, skipping insertion in model container [2023-11-06 23:07:29,002 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:29,089 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:07:29,505 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_5484a5a1-3bda-4e2b-9ad5-c26208062435/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2023-11-06 23:07:29,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:29,550 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:07:29,620 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_5484a5a1-3bda-4e2b-9ad5-c26208062435/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2023-11-06 23:07:29,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:29,724 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:07:29,724 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29 WrapperNode [2023-11-06 23:07:29,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:29,726 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:07:29,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:07:29,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:07:29,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,819 INFO L138 Inliner]: procedures = 170, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-11-06 23:07:29,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:07:29,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:07:29,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:07:29,827 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:07:29,839 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,854 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,870 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,889 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,896 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:07:29,904 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:07:29,905 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:07:29,905 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:07:29,906 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:29,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:29,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:07:29,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:07:30,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:07:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:07:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 23:07:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:07:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:07:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 23:07:30,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 23:07:30,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:07:30,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:07:30,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:07:30,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:07:30,013 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 23:07:30,292 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:07:30,295 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:07:30,620 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:07:30,629 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:07:30,630 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-06 23:07:30,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:30 BoogieIcfgContainer [2023-11-06 23:07:30,633 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:07:30,636 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:07:30,636 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:07:30,640 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:07:30,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:07:28" (1/3) ... [2023-11-06 23:07:30,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc84f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:07:30, skipping insertion in model container [2023-11-06 23:07:30,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29" (2/3) ... [2023-11-06 23:07:30,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc84f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:07:30, skipping insertion in model container [2023-11-06 23:07:30,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:30" (3/3) ... [2023-11-06 23:07:30,643 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2023-11-06 23:07:30,654 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:07:30,693 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:07:30,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:07:30,694 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:07:30,775 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 23:07:30,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 113 transitions, 233 flow [2023-11-06 23:07:30,879 INFO L124 PetriNetUnfolderBase]: 17/151 cut-off events. [2023-11-06 23:07:30,880 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:07:30,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 17/151 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 338 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-11-06 23:07:30,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 113 transitions, 233 flow [2023-11-06 23:07:30,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 108 transitions, 220 flow [2023-11-06 23:07:30,895 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:07:30,905 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 108 transitions, 220 flow [2023-11-06 23:07:30,908 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 108 transitions, 220 flow [2023-11-06 23:07:30,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 108 transitions, 220 flow [2023-11-06 23:07:30,946 INFO L124 PetriNetUnfolderBase]: 16/146 cut-off events. [2023-11-06 23:07:30,946 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:07:30,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 146 events. 16/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 327 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-11-06 23:07:30,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 2464 [2023-11-06 23:07:35,063 INFO L134 LiptonReduction]: Checked pairs total: 3959 [2023-11-06 23:07:35,063 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-11-06 23:07:35,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:07:35,098 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;@1b04a8ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:07:35,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 23:07:35,107 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:07:35,108 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-06 23:07:35,108 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:07:35,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:35,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:07:35,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:35,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:35,119 INFO L85 PathProgramCache]: Analyzing trace with hash 13310547, now seen corresponding path program 1 times [2023-11-06 23:07:35,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:35,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127375310] [2023-11-06 23:07:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:35,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:35,485 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 23:07:35,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:35,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127375310] [2023-11-06 23:07:35,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127375310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:35,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:35,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:07:35,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336616174] [2023-11-06 23:07:35,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:35,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:35,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:35,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 208 [2023-11-06 23:07:35,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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 23:07:35,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:35,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 208 [2023-11-06 23:07:35,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:35,703 INFO L124 PetriNetUnfolderBase]: 64/154 cut-off events. [2023-11-06 23:07:35,703 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:07:35,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 154 events. 64/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 512 event pairs, 49 based on Foata normal form. 9/144 useless extension candidates. Maximal degree in co-relation 293. Up to 137 conditions per place. [2023-11-06 23:07:35,706 INFO L140 encePairwiseOnDemand]: 196/208 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-06 23:07:35,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 118 flow [2023-11-06 23:07:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:07:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 322 transitions. [2023-11-06 23:07:35,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2023-11-06 23:07:35,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 322 transitions. [2023-11-06 23:07:35,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 322 transitions. [2023-11-06 23:07:35,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:35,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 322 transitions. [2023-11-06 23:07:35,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 23:07:35,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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 23:07:35,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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 23:07:35,744 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 64 flow. Second operand 3 states and 322 transitions. [2023-11-06 23:07:35,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 118 flow [2023-11-06 23:07:35,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 118 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:07:35,749 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 46 flow [2023-11-06 23:07:35,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-06 23:07:35,755 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-06 23:07:35,755 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 46 flow [2023-11-06 23:07:35,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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 23:07:35,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:35,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 23:07:35,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:07:35,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:35,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash -105844525, now seen corresponding path program 1 times [2023-11-06 23:07:35,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:35,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599885081] [2023-11-06 23:07:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:35,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:07:35,789 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 23:07:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:07:35,834 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 23:07:35,834 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 23:07:35,836 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 23:07:35,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 23:07:35,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:07:35,840 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 23:07:35,843 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 23:07:35,843 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 23:07:35,869 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:07:35,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 143 transitions, 302 flow [2023-11-06 23:07:35,917 INFO L124 PetriNetUnfolderBase]: 31/245 cut-off events. [2023-11-06 23:07:35,917 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 23:07:35,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 245 events. 31/245 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 680 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-11-06 23:07:35,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 143 transitions, 302 flow [2023-11-06 23:07:35,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 143 transitions, 302 flow [2023-11-06 23:07:35,924 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:07:35,924 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 143 transitions, 302 flow [2023-11-06 23:07:35,924 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 143 transitions, 302 flow [2023-11-06 23:07:35,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 143 transitions, 302 flow [2023-11-06 23:07:35,958 INFO L124 PetriNetUnfolderBase]: 31/245 cut-off events. [2023-11-06 23:07:35,959 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 23:07:35,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 245 events. 31/245 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 680 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-11-06 23:07:35,969 INFO L119 LiptonReduction]: Number of co-enabled transitions 7112 [2023-11-06 23:07:39,921 INFO L134 LiptonReduction]: Checked pairs total: 17545 [2023-11-06 23:07:39,921 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-11-06 23:07:39,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:07:39,926 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;@1b04a8ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:07:39,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 23:07:39,929 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:07:39,930 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 23:07:39,930 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:07:39,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:39,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:07:39,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:39,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash 21929791, now seen corresponding path program 1 times [2023-11-06 23:07:39,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:39,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839960419] [2023-11-06 23:07:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:39,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:40,016 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 23:07:40,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:40,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839960419] [2023-11-06 23:07:40,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839960419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:40,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:40,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:07:40,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614600143] [2023-11-06 23:07:40,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:40,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:40,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:40,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:40,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:40,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 250 [2023-11-06 23:07:40,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 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 23:07:40,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:40,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 250 [2023-11-06 23:07:40,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:40,440 INFO L124 PetriNetUnfolderBase]: 1260/2319 cut-off events. [2023-11-06 23:07:40,440 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-11-06 23:07:40,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4443 conditions, 2319 events. 1260/2319 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 13776 event pairs, 1137 based on Foata normal form. 461/2531 useless extension candidates. Maximal degree in co-relation 2286. Up to 2071 conditions per place. [2023-11-06 23:07:40,462 INFO L140 encePairwiseOnDemand]: 233/250 looper letters, 28 selfloop transitions, 2 changer transitions 9/49 dead transitions. [2023-11-06 23:07:40,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 190 flow [2023-11-06 23:07:40,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:07:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-11-06 23:07:40,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386666666666666 [2023-11-06 23:07:40,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-11-06 23:07:40,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-11-06 23:07:40,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:40,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-11-06 23:07:40,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 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 23:07:40,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 23:07:40,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 23:07:40,486 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 126 flow. Second operand 3 states and 404 transitions. [2023-11-06 23:07:40,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 190 flow [2023-11-06 23:07:40,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:07:40,492 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-11-06 23:07:40,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, 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 23:07:40,494 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-06 23:07:40,494 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-11-06 23:07:40,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 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 23:07:40,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:40,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:40,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:07:40,498 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:40,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:40,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1493952271, now seen corresponding path program 1 times [2023-11-06 23:07:40,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:40,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132327299] [2023-11-06 23:07:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:40,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:40,708 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 23:07:40,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:40,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132327299] [2023-11-06 23:07:40,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132327299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:40,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889663479] [2023-11-06 23:07:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:40,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:40,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:40,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:40,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:07:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:40,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:07:40,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:40,911 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 23:07:40,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:40,936 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 23:07:40,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889663479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:40,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:40,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 23:07:40,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336200727] [2023-11-06 23:07:40,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:40,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:07:40,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:40,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:07:40,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:07:40,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 250 [2023-11-06 23:07:40,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 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 23:07:40,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:40,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 250 [2023-11-06 23:07:40,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:41,163 INFO L124 PetriNetUnfolderBase]: 286/595 cut-off events. [2023-11-06 23:07:41,163 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2023-11-06 23:07:41,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 595 events. 286/595 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3045 event pairs, 0 based on Foata normal form. 70/665 useless extension candidates. Maximal degree in co-relation 173. Up to 346 conditions per place. [2023-11-06 23:07:41,169 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-11-06 23:07:41,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 206 flow [2023-11-06 23:07:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:07:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:07:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 614 transitions. [2023-11-06 23:07:41,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912 [2023-11-06 23:07:41,173 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 614 transitions. [2023-11-06 23:07:41,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 614 transitions. [2023-11-06 23:07:41,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:41,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 614 transitions. [2023-11-06 23:07:41,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 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 23:07:41,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 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 23:07:41,181 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 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 23:07:41,182 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 5 states and 614 transitions. [2023-11-06 23:07:41,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 206 flow [2023-11-06 23:07:41,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:07:41,185 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-06 23:07:41,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, 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 23:07:41,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-06 23:07:41,187 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-06 23:07:41,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 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 23:07:41,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:41,189 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 23:07:41,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:07:41,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:41,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:41,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1316177088, now seen corresponding path program 1 times [2023-11-06 23:07:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:41,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704790545] [2023-11-06 23:07:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:41,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:07:41,421 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 23:07:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:07:41,459 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 23:07:41,463 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 23:07:41,465 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 23:07:41,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 23:07:41,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:07:41,465 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 23:07:41,466 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 23:07:41,467 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 23:07:41,500 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:07:41,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 173 transitions, 373 flow [2023-11-06 23:07:41,575 INFO L124 PetriNetUnfolderBase]: 50/374 cut-off events. [2023-11-06 23:07:41,576 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 23:07:41,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 374 events. 50/374 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1189 event pairs, 1 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 253. Up to 16 conditions per place. [2023-11-06 23:07:41,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 173 transitions, 373 flow [2023-11-06 23:07:41,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 173 transitions, 373 flow [2023-11-06 23:07:41,584 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:07:41,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 173 transitions, 373 flow [2023-11-06 23:07:41,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 173 transitions, 373 flow [2023-11-06 23:07:41,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 173 transitions, 373 flow [2023-11-06 23:07:41,631 INFO L124 PetriNetUnfolderBase]: 50/374 cut-off events. [2023-11-06 23:07:41,632 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 23:07:41,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 374 events. 50/374 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1189 event pairs, 1 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 253. Up to 16 conditions per place. [2023-11-06 23:07:41,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 13272 [2023-11-06 23:07:45,471 INFO L134 LiptonReduction]: Checked pairs total: 33986 [2023-11-06 23:07:45,472 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-11-06 23:07:45,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:07:45,476 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;@1b04a8ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:07:45,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 23:07:45,479 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:07:45,479 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 23:07:45,479 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:07:45,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:45,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:07:45,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:45,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:45,481 INFO L85 PathProgramCache]: Analyzing trace with hash 31934437, now seen corresponding path program 1 times [2023-11-06 23:07:45,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:45,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267306761] [2023-11-06 23:07:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:45,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:45,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:45,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267306761] [2023-11-06 23:07:45,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267306761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:45,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:45,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:07:45,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970710752] [2023-11-06 23:07:45,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:45,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:45,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:45,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:45,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 295 [2023-11-06 23:07:45,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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 23:07:45,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:45,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 295 [2023-11-06 23:07:45,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:50,633 INFO L124 PetriNetUnfolderBase]: 23815/35594 cut-off events. [2023-11-06 23:07:50,633 INFO L125 PetriNetUnfolderBase]: For 1017/1017 co-relation queries the response was YES. [2023-11-06 23:07:50,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69892 conditions, 35594 events. 23815/35594 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 242728 event pairs, 22652 based on Foata normal form. 7139/39789 useless extension candidates. Maximal degree in co-relation 27178. Up to 33630 conditions per place. [2023-11-06 23:07:50,848 INFO L140 encePairwiseOnDemand]: 272/295 looper letters, 41 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2023-11-06 23:07:50,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 259 flow [2023-11-06 23:07:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:07:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-11-06 23:07:50,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536723163841808 [2023-11-06 23:07:50,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-11-06 23:07:50,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-11-06 23:07:50,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:50,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-11-06 23:07:50,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 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 23:07:50,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 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 23:07:50,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 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 23:07:50,861 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 175 flow. Second operand 3 states and 490 transitions. [2023-11-06 23:07:50,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 259 flow [2023-11-06 23:07:50,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:07:50,870 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 118 flow [2023-11-06 23:07:50,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, 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 23:07:50,876 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-06 23:07:50,876 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 118 flow [2023-11-06 23:07:50,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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 23:07:50,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:50,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:50,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:07:50,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:50,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:50,879 INFO L85 PathProgramCache]: Analyzing trace with hash 511285219, now seen corresponding path program 1 times [2023-11-06 23:07:50,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:50,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843675079] [2023-11-06 23:07:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:50,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:50,958 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 23:07:50,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:50,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843675079] [2023-11-06 23:07:50,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843675079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:50,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611938651] [2023-11-06 23:07:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:50,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:50,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:50,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:50,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:07:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:51,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:07:51,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:51,108 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 23:07:51,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:51,134 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 23:07:51,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611938651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:51,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:51,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 23:07:51,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616485093] [2023-11-06 23:07:51,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:51,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:07:51,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:51,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:07:51,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:07:51,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-11-06 23:07:51,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 138.28571428571428) internal successors, (968), 7 states have internal predecessors, (968), 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 23:07:51,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:51,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-11-06 23:07:51,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:52,470 INFO L124 PetriNetUnfolderBase]: 5560/8977 cut-off events. [2023-11-06 23:07:52,471 INFO L125 PetriNetUnfolderBase]: For 3483/3483 co-relation queries the response was YES. [2023-11-06 23:07:52,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18185 conditions, 8977 events. 5560/8977 cut-off events. For 3483/3483 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 58633 event pairs, 630 based on Foata normal form. 819/9777 useless extension candidates. Maximal degree in co-relation 2075. Up to 5346 conditions per place. [2023-11-06 23:07:52,552 INFO L140 encePairwiseOnDemand]: 292/295 looper letters, 79 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-11-06 23:07:52,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 382 flow [2023-11-06 23:07:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:07:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:07:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 902 transitions. [2023-11-06 23:07:52,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096045197740113 [2023-11-06 23:07:52,562 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 902 transitions. [2023-11-06 23:07:52,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 902 transitions. [2023-11-06 23:07:52,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:52,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 902 transitions. [2023-11-06 23:07:52,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 150.33333333333334) internal successors, (902), 6 states have internal predecessors, (902), 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 23:07:52,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 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 23:07:52,579 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 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 23:07:52,579 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 118 flow. Second operand 6 states and 902 transitions. [2023-11-06 23:07:52,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 382 flow [2023-11-06 23:07:52,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 378 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:07:52,588 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-06 23:07:52,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, 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 23:07:52,590 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-06 23:07:52,591 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-06 23:07:52,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.28571428571428) internal successors, (968), 7 states have internal predecessors, (968), 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 23:07:52,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:52,592 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 23:07:52,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:52,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:52,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:52,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:52,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1752246681, now seen corresponding path program 1 times [2023-11-06 23:07:52,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:52,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592546403] [2023-11-06 23:07:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:52,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:07:52,840 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 23:07:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:07:52,881 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 23:07:52,881 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 23:07:52,882 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 23:07:52,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 23:07:52,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:07:52,883 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 23:07:52,885 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 23:07:52,885 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 23:07:52,938 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 23:07:52,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 203 transitions, 446 flow [2023-11-06 23:07:53,069 INFO L124 PetriNetUnfolderBase]: 81/575 cut-off events. [2023-11-06 23:07:53,070 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 23:07:53,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 575 events. 81/575 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2150 event pairs, 6 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 394. Up to 32 conditions per place. [2023-11-06 23:07:53,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 203 transitions, 446 flow [2023-11-06 23:07:53,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 203 transitions, 446 flow [2023-11-06 23:07:53,085 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:07:53,085 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 203 transitions, 446 flow [2023-11-06 23:07:53,086 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 203 transitions, 446 flow [2023-11-06 23:07:53,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 203 transitions, 446 flow [2023-11-06 23:07:53,207 INFO L124 PetriNetUnfolderBase]: 81/575 cut-off events. [2023-11-06 23:07:53,208 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 23:07:53,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 575 events. 81/575 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2150 event pairs, 6 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 394. Up to 32 conditions per place. [2023-11-06 23:07:53,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 21168 [2023-11-06 23:07:57,555 INFO L134 LiptonReduction]: Checked pairs total: 63134 [2023-11-06 23:07:57,555 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-11-06 23:07:57,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:07:57,559 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;@1b04a8ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:07:57,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 23:07:57,562 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:07:57,562 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-06 23:07:57,562 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:07:57,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:57,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:07:57,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:57,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:57,563 INFO L85 PathProgramCache]: Analyzing trace with hash 43294512, now seen corresponding path program 1 times [2023-11-06 23:07:57,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:57,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287283632] [2023-11-06 23:07:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:57,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:57,618 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 23:07:57,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:57,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287283632] [2023-11-06 23:07:57,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287283632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:57,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:57,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:07:57,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078758909] [2023-11-06 23:07:57,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:57,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:57,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:57,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2023-11-06 23:07:57,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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 23:07:57,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:57,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2023-11-06 23:07:57,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:30,980 INFO L124 PetriNetUnfolderBase]: 212870/296484 cut-off events. [2023-11-06 23:08:30,980 INFO L125 PetriNetUnfolderBase]: For 11952/11952 co-relation queries the response was YES. [2023-11-06 23:08:31,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581451 conditions, 296484 events. 212870/296484 cut-off events. For 11952/11952 co-relation queries the response was YES. Maximal size of possible extension queue 6720. Compared 2301930 event pairs, 172774 based on Foata normal form. 50558/326827 useless extension candidates. Maximal degree in co-relation 56030. Up to 278951 conditions per place. [2023-11-06 23:08:32,320 INFO L140 encePairwiseOnDemand]: 310/339 looper letters, 46 selfloop transitions, 2 changer transitions 11/76 dead transitions. [2023-11-06 23:08:32,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 308 flow [2023-11-06 23:08:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-11-06 23:08:32,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585054080629301 [2023-11-06 23:08:32,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-11-06 23:08:32,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-11-06 23:08:32,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:32,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-11-06 23:08:32,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 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 23:08:32,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 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 23:08:32,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 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 23:08:32,330 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 226 flow. Second operand 3 states and 568 transitions. [2023-11-06 23:08:32,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 308 flow [2023-11-06 23:08:32,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:08:32,336 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 152 flow [2023-11-06 23:08:32,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-11-06 23:08:32,339 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-11-06 23:08:32,339 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 152 flow [2023-11-06 23:08:32,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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 23:08:32,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:32,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:32,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:08:32,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:32,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:32,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1430268122, now seen corresponding path program 1 times [2023-11-06 23:08:32,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:32,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051769233] [2023-11-06 23:08:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:32,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:32,410 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 23:08:32,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051769233] [2023-11-06 23:08:32,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051769233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435989940] [2023-11-06 23:08:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:32,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:32,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:32,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:32,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5484a5a1-3bda-4e2b-9ad5-c26208062435/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:08:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:32,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:08:32,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:32,525 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 23:08:32,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:32,547 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 23:08:32,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435989940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:32,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:32,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 23:08:32,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680415431] [2023-11-06 23:08:32,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:32,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:08:32,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:08:32,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:08:32,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 339 [2023-11-06 23:08:32,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 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 23:08:32,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:32,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 339 [2023-11-06 23:08:32,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand