./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R --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 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:17:28,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:17:28,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:17:28,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:17:28,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:17:28,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:17:28,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:17:28,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:17:28,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:17:28,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:17:28,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:17:28,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:17:28,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:17:28,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:17:28,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:17:28,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:17:28,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:17:28,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:17:28,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:17:28,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:17:28,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:17:28,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:17:28,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:17:28,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:17:28,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:17:28,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:17:28,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:17:28,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:17:28,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:17:28,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:17:28,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:17:28,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:17:28,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:17:28,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:17:28,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:17:28,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:17:28,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:17:28,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:17:28,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:17:28,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:17:28,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:17:28,555 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:17:28,585 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:17:28,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:17:28,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:17:28,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:17:28,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:17:28,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:17:28,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:17:28,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:17:28,589 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:17:28,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:17:28,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:17:28,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:17:28,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:17:28,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:17:28,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:17:28,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:17:28,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:17:28,592 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:17:28,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:17:28,593 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:17:28,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:17:28,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:17:28,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:17:28,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:17:28,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:17:28,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:17:28,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:17:28,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:17:28,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:17:28,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:17:28,596 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:17:28,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:17:28,597 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:17:28,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:17:28,597 INFO L138 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_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 [2022-11-25 18:17:28,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:17:28,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:17:28,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:17:28,980 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:17:28,980 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:17:28,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-11-25 18:17:32,157 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:17:32,434 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:17:32,439 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-11-25 18:17:32,460 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/data/2dbc9957a/6e5f3b63fc1a458faa42dfd6e4aa077f/FLAGb15af03fd [2022-11-25 18:17:32,478 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/data/2dbc9957a/6e5f3b63fc1a458faa42dfd6e4aa077f [2022-11-25 18:17:32,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:17:32,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:17:32,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:17:32,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:17:32,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:17:32,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:17:32" (1/1) ... [2022-11-25 18:17:32,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ac65a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:32, skipping insertion in model container [2022-11-25 18:17:32,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:17:32" (1/1) ... [2022-11-25 18:17:32,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:17:32,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:17:32,841 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 18:17:33,062 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:17:33,064 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:17:33,068 WARN L237 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_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-11-25 18:17:33,074 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:17:33,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:17:33,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:17:33,089 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:17:33,118 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 18:17:33,155 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:17:33,157 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:17:33,161 WARN L237 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_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-11-25 18:17:33,162 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:17:33,162 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:17:33,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:17:33,214 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:17:33,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33 WrapperNode [2022-11-25 18:17:33,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:17:33,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:17:33,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:17:33,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:17:33,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,301 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2022-11-25 18:17:33,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:17:33,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:17:33,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:17:33,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:17:33,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,355 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:17:33,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:17:33,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:17:33,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:17:33,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (1/1) ... [2022-11-25 18:17:33,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:17:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:17:33,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:17:33,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df2c9a5-58b3-464d-ba2a-5ba72dd3c890/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:17:33,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:17:33,472 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 18:17:33,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 18:17:33,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:17:33,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:17:33,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:17:33,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:17:33,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:17:33,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:17:33,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:17:33,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:17:33,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:17:33,476 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:17:33,723 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:17:33,725 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:17:33,962 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:17:34,111 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:17:34,130 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 18:17:34,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:17:34 BoogieIcfgContainer [2022-11-25 18:17:34,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:17:34,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:17:34,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:17:34,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:17:34,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:17:32" (1/3) ... [2022-11-25 18:17:34,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19672d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:17:34, skipping insertion in model container [2022-11-25 18:17:34,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33" (2/3) ... [2022-11-25 18:17:34,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19672d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:17:34, skipping insertion in model container [2022-11-25 18:17:34,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:17:34" (3/3) ... [2022-11-25 18:17:34,143 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2022-11-25 18:17:34,153 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:17:34,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:17:34,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 18:17:34,165 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:17:34,215 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:17:34,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 75 transitions, 155 flow [2022-11-25 18:17:34,307 INFO L130 PetriNetUnfolder]: 8/113 cut-off events. [2022-11-25 18:17:34,307 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:17:34,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 8/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 208 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2022-11-25 18:17:34,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 75 transitions, 155 flow [2022-11-25 18:17:34,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 75 transitions, 155 flow [2022-11-25 18:17:34,324 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:17:34,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 75 transitions, 155 flow [2022-11-25 18:17:34,346 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 75 transitions, 155 flow [2022-11-25 18:17:34,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 75 transitions, 155 flow [2022-11-25 18:17:34,380 INFO L130 PetriNetUnfolder]: 8/113 cut-off events. [2022-11-25 18:17:34,380 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:17:34,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 8/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 208 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2022-11-25 18:17:34,384 INFO L119 LiptonReduction]: Number of co-enabled transitions 1394 [2022-11-25 18:17:36,280 INFO L134 LiptonReduction]: Checked pairs total: 4399 [2022-11-25 18:17:36,280 INFO L136 LiptonReduction]: Total number of compositions: 65 [2022-11-25 18:17:36,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:17:36,326 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;@48572eaa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:17:36,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 18:17:36,333 INFO L130 PetriNetUnfolder]: 5/20 cut-off events. [2022-11-25 18:17:36,334 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:17:36,334 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:36,335 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:17:36,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:17:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:36,341 INFO L85 PathProgramCache]: Analyzing trace with hash 374681411, now seen corresponding path program 1 times [2022-11-25 18:17:36,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:36,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482017826] [2022-11-25 18:17:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:36,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:36,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:36,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482017826] [2022-11-25 18:17:36,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482017826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:17:36,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:17:36,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:17:36,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753080362] [2022-11-25 18:17:36,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:17:36,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:17:36,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:36,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:17:36,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:17:36,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 140 [2022-11-25 18:17:36,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 63 flow. Second operand has 2 states, 2 states have (on average 63.0) internal successors, (126), 2 states have internal predecessors, (126), 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) [2022-11-25 18:17:36,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:36,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 140 [2022-11-25 18:17:36,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:17:36,775 INFO L130 PetriNetUnfolder]: 72/185 cut-off events. [2022-11-25 18:17:36,775 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:17:36,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 185 events. 72/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 689 event pairs, 54 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 310. Up to 152 conditions per place. [2022-11-25 18:17:36,781 INFO L137 encePairwiseOnDemand]: 137/140 looper letters, 19 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2022-11-25 18:17:36,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 26 transitions, 95 flow [2022-11-25 18:17:36,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:17:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:17:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 144 transitions. [2022-11-25 18:17:36,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2022-11-25 18:17:36,802 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 144 transitions. [2022-11-25 18:17:36,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 144 transitions. [2022-11-25 18:17:36,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:17:36,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 144 transitions. [2022-11-25 18:17:36,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 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) [2022-11-25 18:17:36,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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) [2022-11-25 18:17:36,831 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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) [2022-11-25 18:17:36,833 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 63 flow. Second operand 2 states and 144 transitions. [2022-11-25 18:17:36,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 26 transitions, 95 flow [2022-11-25 18:17:36,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 95 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:17:36,839 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 57 flow [2022-11-25 18:17:36,842 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=57, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2022-11-25 18:17:36,847 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2022-11-25 18:17:36,848 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 57 flow [2022-11-25 18:17:36,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.0) internal successors, (126), 2 states have internal predecessors, (126), 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) [2022-11-25 18:17:36,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:36,853 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 18:17:36,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:17:36,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:17:36,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:36,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1274429958, now seen corresponding path program 1 times [2022-11-25 18:17:36,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:36,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922781240] [2022-11-25 18:17:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:36,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:17:36,911 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:17:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:17:36,951 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:17:36,951 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:17:36,953 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 18:17:36,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 18:17:36,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 18:17:36,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 18:17:36,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:17:36,958 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 18:17:36,961 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:17:36,961 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 18:17:36,987 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:17:36,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 93 transitions, 198 flow [2022-11-25 18:17:37,019 INFO L130 PetriNetUnfolder]: 13/171 cut-off events. [2022-11-25 18:17:37,020 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:17:37,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 171 events. 13/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 436 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-11-25 18:17:37,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 93 transitions, 198 flow [2022-11-25 18:17:37,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 93 transitions, 198 flow [2022-11-25 18:17:37,024 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:17:37,024 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 93 transitions, 198 flow [2022-11-25 18:17:37,024 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 93 transitions, 198 flow [2022-11-25 18:17:37,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 93 transitions, 198 flow [2022-11-25 18:17:37,050 INFO L130 PetriNetUnfolder]: 13/171 cut-off events. [2022-11-25 18:17:37,051 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:17:37,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 171 events. 13/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 436 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-11-25 18:17:37,056 INFO L119 LiptonReduction]: Number of co-enabled transitions 3400 [2022-11-25 18:17:39,152 INFO L134 LiptonReduction]: Checked pairs total: 12043 [2022-11-25 18:17:39,152 INFO L136 LiptonReduction]: Total number of compositions: 76 [2022-11-25 18:17:39,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:17:39,156 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;@48572eaa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:17:39,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 18:17:39,159 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-25 18:17:39,159 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:17:39,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:39,160 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:17:39,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:17:39,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:39,161 INFO L85 PathProgramCache]: Analyzing trace with hash 552154360, now seen corresponding path program 1 times [2022-11-25 18:17:39,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:39,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131203876] [2022-11-25 18:17:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:39,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:39,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:39,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131203876] [2022-11-25 18:17:39,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131203876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:17:39,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:17:39,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:17:39,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442208165] [2022-11-25 18:17:39,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:17:39,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:17:39,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:39,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:17:39,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:17:39,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2022-11-25 18:17:39,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 96 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 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) [2022-11-25 18:17:39,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:39,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2022-11-25 18:17:39,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:17:39,479 INFO L130 PetriNetUnfolder]: 954/1679 cut-off events. [2022-11-25 18:17:39,479 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 18:17:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 1679 events. 954/1679 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9606 event pairs, 762 based on Foata normal form. 0/1377 useless extension candidates. Maximal degree in co-relation 659. Up to 1468 conditions per place. [2022-11-25 18:17:39,490 INFO L137 encePairwiseOnDemand]: 165/169 looper letters, 26 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2022-11-25 18:17:39,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 140 flow [2022-11-25 18:17:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:17:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:17:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 174 transitions. [2022-11-25 18:17:39,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.514792899408284 [2022-11-25 18:17:39,492 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 174 transitions. [2022-11-25 18:17:39,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 174 transitions. [2022-11-25 18:17:39,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:17:39,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 174 transitions. [2022-11-25 18:17:39,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2022-11-25 18:17:39,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2022-11-25 18:17:39,496 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2022-11-25 18:17:39,496 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 96 flow. Second operand 2 states and 174 transitions. [2022-11-25 18:17:39,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 140 flow [2022-11-25 18:17:39,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 138 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 18:17:39,498 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 86 flow [2022-11-25 18:17:39,498 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=86, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2022-11-25 18:17:39,499 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2022-11-25 18:17:39,499 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 86 flow [2022-11-25 18:17:39,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 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) [2022-11-25 18:17:39,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:39,500 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:17:39,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:17:39,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:17:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:39,501 INFO L85 PathProgramCache]: Analyzing trace with hash -57781878, now seen corresponding path program 1 times [2022-11-25 18:17:39,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:39,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262704030] [2022-11-25 18:17:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:39,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:39,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:39,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262704030] [2022-11-25 18:17:39,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262704030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:17:39,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:17:39,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:17:39,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550119939] [2022-11-25 18:17:39,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:17:39,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:17:39,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:39,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:17:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:17:39,726 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 169 [2022-11-25 18:17:39,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2022-11-25 18:17:39,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:39,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 169 [2022-11-25 18:17:39,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:17:40,156 INFO L130 PetriNetUnfolder]: 1886/3179 cut-off events. [2022-11-25 18:17:40,157 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-25 18:17:40,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6142 conditions, 3179 events. 1886/3179 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18003 event pairs, 1093 based on Foata normal form. 263/3068 useless extension candidates. Maximal degree in co-relation 6137. Up to 2293 conditions per place. [2022-11-25 18:17:40,176 INFO L137 encePairwiseOnDemand]: 160/169 looper letters, 53 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2022-11-25 18:17:40,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 65 transitions, 263 flow [2022-11-25 18:17:40,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:17:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:17:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2022-11-25 18:17:40,182 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4891518737672584 [2022-11-25 18:17:40,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2022-11-25 18:17:40,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2022-11-25 18:17:40,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:17:40,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2022-11-25 18:17:40,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2022-11-25 18:17:40,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 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) [2022-11-25 18:17:40,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 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) [2022-11-25 18:17:40,196 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 86 flow. Second operand 3 states and 248 transitions. [2022-11-25 18:17:40,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 65 transitions, 263 flow [2022-11-25 18:17:40,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:17:40,199 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 140 flow [2022-11-25 18:17:40,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2022-11-25 18:17:40,202 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2022-11-25 18:17:40,202 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 140 flow [2022-11-25 18:17:40,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2022-11-25 18:17:40,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:40,203 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 18:17:40,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:17:40,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:17:40,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:40,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1133035493, now seen corresponding path program 1 times [2022-11-25 18:17:40,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:40,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747276145] [2022-11-25 18:17:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:40,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:17:40,240 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:17:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:17:40,262 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:17:40,268 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:17:40,268 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 18:17:40,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 18:17:40,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 18:17:40,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 18:17:40,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 18:17:40,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:17:40,270 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 18:17:40,271 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:17:40,271 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 18:17:40,302 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:17:40,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 243 flow [2022-11-25 18:17:40,327 INFO L130 PetriNetUnfolder]: 18/229 cut-off events. [2022-11-25 18:17:40,327 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:17:40,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 229 events. 18/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 671 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2022-11-25 18:17:40,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 111 transitions, 243 flow [2022-11-25 18:17:40,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 111 transitions, 243 flow [2022-11-25 18:17:40,330 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:17:40,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 111 transitions, 243 flow [2022-11-25 18:17:40,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 111 transitions, 243 flow [2022-11-25 18:17:40,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 243 flow [2022-11-25 18:17:40,353 INFO L130 PetriNetUnfolder]: 18/229 cut-off events. [2022-11-25 18:17:40,353 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:17:40,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 229 events. 18/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 671 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2022-11-25 18:17:40,360 INFO L119 LiptonReduction]: Number of co-enabled transitions 6018 [2022-11-25 18:17:42,600 INFO L134 LiptonReduction]: Checked pairs total: 24680 [2022-11-25 18:17:42,601 INFO L136 LiptonReduction]: Total number of compositions: 84 [2022-11-25 18:17:42,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:17:42,604 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;@48572eaa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:17:42,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 18:17:42,607 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-25 18:17:42,608 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:17:42,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:42,608 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:17:42,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 18:17:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:42,609 INFO L85 PathProgramCache]: Analyzing trace with hash 753518700, now seen corresponding path program 1 times [2022-11-25 18:17:42,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:42,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211846321] [2022-11-25 18:17:42,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:42,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:42,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:42,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211846321] [2022-11-25 18:17:42,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211846321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:17:42,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:17:42,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:17:42,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143456638] [2022-11-25 18:17:42,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:17:42,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:17:42,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:42,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:17:42,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:17:42,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 195 [2022-11-25 18:17:42,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 127 flow. Second operand has 2 states, 2 states have (on average 85.0) internal successors, (170), 2 states have internal predecessors, (170), 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) [2022-11-25 18:17:42,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:42,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 195 [2022-11-25 18:17:42,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:17:44,648 INFO L130 PetriNetUnfolder]: 11720/17557 cut-off events. [2022-11-25 18:17:44,648 INFO L131 PetriNetUnfolder]: For 463/463 co-relation queries the response was YES. [2022-11-25 18:17:44,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33759 conditions, 17557 events. 11720/17557 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 118338 event pairs, 9671 based on Foata normal form. 0/14256 useless extension candidates. Maximal degree in co-relation 3661. Up to 15825 conditions per place. [2022-11-25 18:17:44,766 INFO L137 encePairwiseOnDemand]: 191/195 looper letters, 35 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2022-11-25 18:17:44,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 189 flow [2022-11-25 18:17:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:17:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:17:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 205 transitions. [2022-11-25 18:17:44,772 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2022-11-25 18:17:44,772 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 205 transitions. [2022-11-25 18:17:44,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 205 transitions. [2022-11-25 18:17:44,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:17:44,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 205 transitions. [2022-11-25 18:17:44,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 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) [2022-11-25 18:17:44,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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) [2022-11-25 18:17:44,776 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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) [2022-11-25 18:17:44,777 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 127 flow. Second operand 2 states and 205 transitions. [2022-11-25 18:17:44,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 189 flow [2022-11-25 18:17:44,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 183 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-25 18:17:44,783 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 113 flow [2022-11-25 18:17:44,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=113, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2022-11-25 18:17:44,784 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2022-11-25 18:17:44,784 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 113 flow [2022-11-25 18:17:44,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.0) internal successors, (170), 2 states have internal predecessors, (170), 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) [2022-11-25 18:17:44,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:44,785 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:17:44,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:17:44,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 18:17:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:44,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1886774210, now seen corresponding path program 1 times [2022-11-25 18:17:44,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:44,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810102233] [2022-11-25 18:17:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:44,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:44,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:44,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810102233] [2022-11-25 18:17:44,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810102233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:17:44,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:17:44,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:17:44,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039001109] [2022-11-25 18:17:44,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:17:44,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:17:44,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:44,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:17:44,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:17:44,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 195 [2022-11-25 18:17:44,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2022-11-25 18:17:44,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:44,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 195 [2022-11-25 18:17:44,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:17:49,196 INFO L130 PetriNetUnfolder]: 33024/47263 cut-off events. [2022-11-25 18:17:49,197 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-11-25 18:17:49,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92617 conditions, 47263 events. 33024/47263 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 1412. Compared 309813 event pairs, 17369 based on Foata normal form. 2654/43912 useless extension candidates. Maximal degree in co-relation 92611. Up to 31958 conditions per place. [2022-11-25 18:17:49,560 INFO L137 encePairwiseOnDemand]: 183/195 looper letters, 72 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2022-11-25 18:17:49,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 357 flow [2022-11-25 18:17:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:17:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:17:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2022-11-25 18:17:49,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5025641025641026 [2022-11-25 18:17:49,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2022-11-25 18:17:49,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2022-11-25 18:17:49,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:17:49,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2022-11-25 18:17:49,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2022-11-25 18:17:49,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 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) [2022-11-25 18:17:49,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 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) [2022-11-25 18:17:49,566 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 113 flow. Second operand 3 states and 294 transitions. [2022-11-25 18:17:49,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 357 flow [2022-11-25 18:17:49,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 357 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:17:49,572 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 185 flow [2022-11-25 18:17:49,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2022-11-25 18:17:49,575 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2022-11-25 18:17:49,576 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 185 flow [2022-11-25 18:17:49,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2022-11-25 18:17:49,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:49,577 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 18:17:49,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:17:49,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 18:17:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash -186874706, now seen corresponding path program 1 times [2022-11-25 18:17:49,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:49,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755449993] [2022-11-25 18:17:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:49,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:17:49,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:17:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:17:49,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:17:49,623 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:17:49,623 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-25 18:17:49,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-25 18:17:49,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-25 18:17:49,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-25 18:17:49,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-25 18:17:49,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-25 18:17:49,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:17:49,627 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 18:17:49,629 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:17:49,629 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 18:17:49,669 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:17:49,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 129 transitions, 290 flow [2022-11-25 18:17:49,714 INFO L130 PetriNetUnfolder]: 23/287 cut-off events. [2022-11-25 18:17:49,714 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:17:49,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 287 events. 23/287 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 899 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2022-11-25 18:17:49,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 129 transitions, 290 flow [2022-11-25 18:17:49,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 129 transitions, 290 flow [2022-11-25 18:17:49,722 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:17:49,722 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 129 transitions, 290 flow [2022-11-25 18:17:49,723 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 129 transitions, 290 flow [2022-11-25 18:17:49,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 129 transitions, 290 flow [2022-11-25 18:17:49,758 INFO L130 PetriNetUnfolder]: 23/287 cut-off events. [2022-11-25 18:17:49,758 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:17:49,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 287 events. 23/287 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 899 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2022-11-25 18:17:49,767 INFO L119 LiptonReduction]: Number of co-enabled transitions 9248 [2022-11-25 18:17:52,221 INFO L134 LiptonReduction]: Checked pairs total: 36016 [2022-11-25 18:17:52,221 INFO L136 LiptonReduction]: Total number of compositions: 100 [2022-11-25 18:17:52,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:17:52,224 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;@48572eaa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:17:52,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:17:52,226 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-25 18:17:52,227 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:17:52,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:52,227 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:17:52,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 18:17:52,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:52,228 INFO L85 PathProgramCache]: Analyzing trace with hash 991045336, now seen corresponding path program 1 times [2022-11-25 18:17:52,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:52,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802823251] [2022-11-25 18:17:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:52,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:52,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:52,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802823251] [2022-11-25 18:17:52,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802823251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:17:52,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:17:52,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:17:52,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591554263] [2022-11-25 18:17:52,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:17:52,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:17:52,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:17:52,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:17:52,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 229 [2022-11-25 18:17:52,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 96.0) internal successors, (192), 2 states have internal predecessors, (192), 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) [2022-11-25 18:17:52,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:52,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 229 [2022-11-25 18:17:52,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:18:04,677 INFO L130 PetriNetUnfolder]: 97043/133222 cut-off events. [2022-11-25 18:18:04,678 INFO L131 PetriNetUnfolder]: For 5093/5093 co-relation queries the response was YES. [2022-11-25 18:18:04,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258422 conditions, 133222 events. 97043/133222 cut-off events. For 5093/5093 co-relation queries the response was YES. Maximal size of possible extension queue 4629. Compared 966618 event pairs, 80436 based on Foata normal form. 0/111889 useless extension candidates. Maximal degree in co-relation 29722. Up to 122253 conditions per place. [2022-11-25 18:18:05,473 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 42 selfloop transitions, 0 changer transitions 0/60 dead transitions. [2022-11-25 18:18:05,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 236 flow [2022-11-25 18:18:05,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:18:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:18:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 236 transitions. [2022-11-25 18:18:05,476 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5152838427947598 [2022-11-25 18:18:05,477 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 236 transitions. [2022-11-25 18:18:05,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 236 transitions. [2022-11-25 18:18:05,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:18:05,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 236 transitions. [2022-11-25 18:18:05,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 118.0) internal successors, (236), 2 states have internal predecessors, (236), 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) [2022-11-25 18:18:05,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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) [2022-11-25 18:18:05,482 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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) [2022-11-25 18:18:05,482 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 164 flow. Second operand 2 states and 236 transitions. [2022-11-25 18:18:05,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 236 flow [2022-11-25 18:18:05,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 224 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-25 18:18:05,493 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 140 flow [2022-11-25 18:18:05,494 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=140, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2022-11-25 18:18:05,496 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2022-11-25 18:18:05,496 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 140 flow [2022-11-25 18:18:05,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 96.0) internal successors, (192), 2 states have internal predecessors, (192), 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) [2022-11-25 18:18:05,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:18:05,497 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:18:05,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:18:05,498 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 18:18:05,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:18:05,498 INFO L85 PathProgramCache]: Analyzing trace with hash 658317875, now seen corresponding path program 1 times [2022-11-25 18:18:05,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:18:05,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017768771] [2022-11-25 18:18:05,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:18:05,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:18:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:18:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:18:05,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:18:05,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017768771] [2022-11-25 18:18:05,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017768771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:18:05,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:18:05,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:18:05,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180604137] [2022-11-25 18:18:05,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:18:05,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:18:05,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:18:05,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:18:05,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:18:05,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 229 [2022-11-25 18:18:05,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2022-11-25 18:18:05,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:18:05,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 229 [2022-11-25 18:18:05,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand