./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8 --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 a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --- 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-2329fc7 [2022-12-13 22:24:35,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:24:35,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:24:35,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:24:35,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:24:35,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:24:35,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:24:35,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:24:35,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:24:35,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:24:35,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:24:35,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:24:35,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:24:35,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:24:35,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:24:35,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:24:35,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:24:35,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:24:35,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:24:35,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:24:35,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:24:35,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:24:35,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:24:35,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:24:35,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:24:35,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:24:35,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:24:35,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:24:35,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:24:35,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:24:35,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:24:35,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:24:35,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:24:35,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:24:35,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:24:35,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:24:35,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:24:35,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:24:35,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:24:35,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:24:35,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:24:35,320 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 22:24:35,341 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:24:35,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:24:35,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:24:35,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:24:35,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:24:35,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:24:35,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:24:35,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:24:35,344 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:24:35,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:24:35,344 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:24:35,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:24:35,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:24:35,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:24:35,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 22:24:35,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:24:35,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 22:24:35,350 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:24:35,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 22:24:35,350 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:24:35,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 22:24:35,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:24:35,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:24:35,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:24:35,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:24:35,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:24:35,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:24:35,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 22:24:35,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:24:35,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:24:35,352 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:24:35,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 22:24:35,352 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:24:35,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:24:35,352 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:24:35,352 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_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2022-12-13 22:24:35,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:24:35,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:24:35,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:24:35,550 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:24:35,550 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:24:35,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2022-12-13 22:24:38,153 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:24:38,305 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:24:38,305 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2022-12-13 22:24:38,314 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/data/46c99b5b7/24f836bd95c541599a2d1502ecbe8df9/FLAG63f3b214d [2022-12-13 22:24:38,325 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/data/46c99b5b7/24f836bd95c541599a2d1502ecbe8df9 [2022-12-13 22:24:38,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:24:38,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:24:38,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:24:38,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:24:38,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:24:38,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58910f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38, skipping insertion in model container [2022-12-13 22:24:38,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:24:38,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:24:38,568 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_7d8f5223-1a14-4e9f-9f0e-44f502725939/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2022-12-13 22:24:38,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:24:38,597 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:24:38,618 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_7d8f5223-1a14-4e9f-9f0e-44f502725939/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2022-12-13 22:24:38,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:24:38,647 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:24:38,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38 WrapperNode [2022-12-13 22:24:38,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:24:38,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:24:38,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:24:38,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:24:38,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,679 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-12-13 22:24:38,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:24:38,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:24:38,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:24:38,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:24:38,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,697 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:24:38,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:24:38,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:24:38,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:24:38,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (1/1) ... [2022-12-13 22:24:38,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:24:38,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:24:38,724 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:24:38,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:24:38,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:24:38,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:24:38,760 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 22:24:38,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:24:38,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:24:38,761 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 22:24:38,761 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 22:24:38,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:24:38,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:24:38,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:24:38,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:24:38,763 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 22:24:38,865 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:24:38,867 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:24:39,057 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:24:39,063 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:24:39,063 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-13 22:24:39,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:24:39 BoogieIcfgContainer [2022-12-13 22:24:39,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:24:39,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:24:39,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:24:39,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:24:39,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:24:38" (1/3) ... [2022-12-13 22:24:39,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750b5431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:24:39, skipping insertion in model container [2022-12-13 22:24:39,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:24:38" (2/3) ... [2022-12-13 22:24:39,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750b5431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:24:39, skipping insertion in model container [2022-12-13 22:24:39,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:24:39" (3/3) ... [2022-12-13 22:24:39,071 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2022-12-13 22:24:39,077 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 22:24:39,085 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:24:39,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 22:24:39,085 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 22:24:39,126 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 22:24:39,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 146 transitions, 300 flow [2022-12-13 22:24:39,222 INFO L130 PetriNetUnfolder]: 26/222 cut-off events. [2022-12-13 22:24:39,222 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:24:39,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 222 events. 26/222 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 577 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2022-12-13 22:24:39,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 146 transitions, 300 flow [2022-12-13 22:24:39,232 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 141 transitions, 287 flow [2022-12-13 22:24:39,236 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:24:39,247 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 141 transitions, 287 flow [2022-12-13 22:24:39,250 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 141 transitions, 287 flow [2022-12-13 22:24:39,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 141 transitions, 287 flow [2022-12-13 22:24:39,288 INFO L130 PetriNetUnfolder]: 25/217 cut-off events. [2022-12-13 22:24:39,288 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:24:39,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 217 events. 25/217 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 529 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2022-12-13 22:24:39,292 INFO L119 LiptonReduction]: Number of co-enabled transitions 3608 [2022-12-13 22:24:41,827 INFO L134 LiptonReduction]: Checked pairs total: 5125 [2022-12-13 22:24:41,828 INFO L136 LiptonReduction]: Total number of compositions: 135 [2022-12-13 22:24:41,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:24:41,842 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;@8a6e18b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:24:41,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 22:24:41,845 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2022-12-13 22:24:41,845 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:24:41,846 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:41,846 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 22:24:41,846 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:24:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1019361433, now seen corresponding path program 1 times [2022-12-13 22:24:41,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:41,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865996444] [2022-12-13 22:24:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:41,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:24:42,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:24:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865996444] [2022-12-13 22:24:42,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865996444] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:24:42,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:24:42,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:24:42,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121593459] [2022-12-13 22:24:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:24:42,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:24:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:24:42,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:24:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:24:42,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 281 [2022-12-13 22:24:42,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 33 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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) [2022-12-13 22:24:42,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:42,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 281 [2022-12-13 22:24:42,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:24:42,194 INFO L130 PetriNetUnfolder]: 116/264 cut-off events. [2022-12-13 22:24:42,194 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:24:42,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 264 events. 116/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 913 event pairs, 38 based on Foata normal form. 15/233 useless extension candidates. Maximal degree in co-relation 473. Up to 136 conditions per place. [2022-12-13 22:24:42,196 INFO L137 encePairwiseOnDemand]: 266/281 looper letters, 25 selfloop transitions, 2 changer transitions 9/38 dead transitions. [2022-12-13 22:24:42,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 38 transitions, 153 flow [2022-12-13 22:24:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:24:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:24:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2022-12-13 22:24:42,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5231316725978647 [2022-12-13 22:24:42,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2022-12-13 22:24:42,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2022-12-13 22:24:42,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:24:42,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2022-12-13 22:24:42,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:42,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:42,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:42,218 INFO L175 Difference]: Start difference. First operand has 25 places, 33 transitions, 71 flow. Second operand 3 states and 441 transitions. [2022-12-13 22:24:42,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 38 transitions, 153 flow [2022-12-13 22:24:42,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:24:42,221 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 69 flow [2022-12-13 22:24:42,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2022-12-13 22:24:42,225 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2022-12-13 22:24:42,226 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 69 flow [2022-12-13 22:24:42,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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) [2022-12-13 22:24:42,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:42,226 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 22:24:42,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:24:42,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:24:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:42,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1019333328, now seen corresponding path program 1 times [2022-12-13 22:24:42,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:42,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212948239] [2022-12-13 22:24:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:42,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:24:42,252 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:24:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:24:42,286 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:24:42,287 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:24:42,288 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 22:24:42,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 22:24:42,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 22:24:42,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:24:42,292 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 22:24:42,294 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 22:24:42,294 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 22:24:42,311 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 22:24:42,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 170 transitions, 358 flow [2022-12-13 22:24:42,345 INFO L130 PetriNetUnfolder]: 43/347 cut-off events. [2022-12-13 22:24:42,345 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 22:24:42,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 347 events. 43/347 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1220 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 224. Up to 9 conditions per place. [2022-12-13 22:24:42,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 170 transitions, 358 flow [2022-12-13 22:24:42,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 170 transitions, 358 flow [2022-12-13 22:24:42,350 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:24:42,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 170 transitions, 358 flow [2022-12-13 22:24:42,350 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 170 transitions, 358 flow [2022-12-13 22:24:42,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 170 transitions, 358 flow [2022-12-13 22:24:42,377 INFO L130 PetriNetUnfolder]: 43/347 cut-off events. [2022-12-13 22:24:42,378 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 22:24:42,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 347 events. 43/347 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1220 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 224. Up to 9 conditions per place. [2022-12-13 22:24:42,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 8668 [2022-12-13 22:24:44,722 INFO L134 LiptonReduction]: Checked pairs total: 13906 [2022-12-13 22:24:44,722 INFO L136 LiptonReduction]: Total number of compositions: 155 [2022-12-13 22:24:44,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:24:44,724 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;@8a6e18b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:24:44,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 22:24:44,727 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2022-12-13 22:24:44,727 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:24:44,727 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:44,727 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 22:24:44,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 22:24:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash 710948059, now seen corresponding path program 1 times [2022-12-13 22:24:44,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334278833] [2022-12-13 22:24:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:44,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:24:44,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:24:44,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334278833] [2022-12-13 22:24:44,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334278833] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:24:44,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:24:44,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:24:44,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907453961] [2022-12-13 22:24:44,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:24:44,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:24:44,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:24:44,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:24:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:24:44,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 325 [2022-12-13 22:24:44,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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) [2022-12-13 22:24:44,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:44,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 325 [2022-12-13 22:24:44,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:24:45,089 INFO L130 PetriNetUnfolder]: 2025/3419 cut-off events. [2022-12-13 22:24:45,089 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-12-13 22:24:45,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6812 conditions, 3419 events. 2025/3419 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 18032 event pairs, 856 based on Foata normal form. 106/2977 useless extension candidates. Maximal degree in co-relation 2502. Up to 1665 conditions per place. [2022-12-13 22:24:45,097 INFO L137 encePairwiseOnDemand]: 307/325 looper letters, 53 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2022-12-13 22:24:45,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 62 transitions, 264 flow [2022-12-13 22:24:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:24:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:24:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2022-12-13 22:24:45,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2022-12-13 22:24:45,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2022-12-13 22:24:45,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2022-12-13 22:24:45,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:24:45,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2022-12-13 22:24:45,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 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) [2022-12-13 22:24:45,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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) [2022-12-13 22:24:45,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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) [2022-12-13 22:24:45,103 INFO L175 Difference]: Start difference. First operand has 38 places, 48 transitions, 114 flow. Second operand 3 states and 520 transitions. [2022-12-13 22:24:45,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 62 transitions, 264 flow [2022-12-13 22:24:45,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:24:45,105 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 132 flow [2022-12-13 22:24:45,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2022-12-13 22:24:45,105 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2022-12-13 22:24:45,105 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 132 flow [2022-12-13 22:24:45,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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) [2022-12-13 22:24:45,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:45,106 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 22:24:45,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:24:45,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 22:24:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:45,106 INFO L85 PathProgramCache]: Analyzing trace with hash 791809820, now seen corresponding path program 1 times [2022-12-13 22:24:45,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:45,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112590026] [2022-12-13 22:24:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:45,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:24:45,117 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:24:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:24:45,128 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:24:45,128 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:24:45,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 22:24:45,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 22:24:45,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 22:24:45,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 22:24:45,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 22:24:45,129 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 22:24:45,129 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 22:24:45,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 22:24:45,144 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 22:24:45,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 194 transitions, 418 flow [2022-12-13 22:24:45,191 INFO L130 PetriNetUnfolder]: 65/505 cut-off events. [2022-12-13 22:24:45,191 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 22:24:45,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 505 events. 65/505 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2027 event pairs, 1 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 355. Up to 16 conditions per place. [2022-12-13 22:24:45,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 194 transitions, 418 flow [2022-12-13 22:24:45,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 194 transitions, 418 flow [2022-12-13 22:24:45,195 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:24:45,195 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 194 transitions, 418 flow [2022-12-13 22:24:45,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 194 transitions, 418 flow [2022-12-13 22:24:45,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 194 transitions, 418 flow [2022-12-13 22:24:45,250 INFO L130 PetriNetUnfolder]: 65/505 cut-off events. [2022-12-13 22:24:45,250 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 22:24:45,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 505 events. 65/505 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2027 event pairs, 1 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 355. Up to 16 conditions per place. [2022-12-13 22:24:45,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 14652 [2022-12-13 22:24:47,882 INFO L134 LiptonReduction]: Checked pairs total: 23985 [2022-12-13 22:24:47,883 INFO L136 LiptonReduction]: Total number of compositions: 177 [2022-12-13 22:24:47,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:24:47,886 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;@8a6e18b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:24:47,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 22:24:47,889 INFO L130 PetriNetUnfolder]: 5/24 cut-off events. [2022-12-13 22:24:47,889 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:24:47,889 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:47,889 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 22:24:47,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 22:24:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:47,890 INFO L85 PathProgramCache]: Analyzing trace with hash -493788266, now seen corresponding path program 1 times [2022-12-13 22:24:47,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:47,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295509739] [2022-12-13 22:24:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:47,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:24:47,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:24:47,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295509739] [2022-12-13 22:24:47,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295509739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:24:47,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:24:47,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:24:47,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645143342] [2022-12-13 22:24:47,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:24:47,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:24:47,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:24:47,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:24:47,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:24:47,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 371 [2022-12-13 22:24:47,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 59 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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) [2022-12-13 22:24:47,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:47,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 371 [2022-12-13 22:24:47,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:24:49,562 INFO L130 PetriNetUnfolder]: 16085/24576 cut-off events. [2022-12-13 22:24:49,562 INFO L131 PetriNetUnfolder]: For 716/716 co-relation queries the response was YES. [2022-12-13 22:24:49,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48519 conditions, 24576 events. 16085/24576 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 164809 event pairs, 7332 based on Foata normal form. 2958/23847 useless extension candidates. Maximal degree in co-relation 5881. Up to 11972 conditions per place. [2022-12-13 22:24:49,635 INFO L137 encePairwiseOnDemand]: 348/371 looper letters, 62 selfloop transitions, 6 changer transitions 0/74 dead transitions. [2022-12-13 22:24:49,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 323 flow [2022-12-13 22:24:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:24:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:24:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2022-12-13 22:24:49,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5309973045822103 [2022-12-13 22:24:49,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2022-12-13 22:24:49,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2022-12-13 22:24:49,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:24:49,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2022-12-13 22:24:49,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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) [2022-12-13 22:24:49,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 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) [2022-12-13 22:24:49,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 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) [2022-12-13 22:24:49,640 INFO L175 Difference]: Start difference. First operand has 47 places, 59 transitions, 148 flow. Second operand 3 states and 591 transitions. [2022-12-13 22:24:49,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 323 flow [2022-12-13 22:24:49,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 323 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:24:49,643 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 170 flow [2022-12-13 22:24:49,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2022-12-13 22:24:49,644 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2022-12-13 22:24:49,644 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 170 flow [2022-12-13 22:24:49,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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) [2022-12-13 22:24:49,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:49,644 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:24:49,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 22:24:49,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 22:24:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1510269992, now seen corresponding path program 1 times [2022-12-13 22:24:49,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:49,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813820714] [2022-12-13 22:24:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:49,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:24:49,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:24:49,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813820714] [2022-12-13 22:24:49,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813820714] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:24:49,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632155238] [2022-12-13 22:24:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:49,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:24:49,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:24:49,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:24:49,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:24:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:49,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 22:24:49,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:24:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:24:49,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:24:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:24:49,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632155238] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:24:49,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:24:49,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 22:24:49,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562323691] [2022-12-13 22:24:49,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:24:49,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:24:49,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:24:49,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:24:49,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:24:49,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 371 [2022-12-13 22:24:49,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 164.85714285714286) internal successors, (1154), 7 states have internal predecessors, (1154), 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) [2022-12-13 22:24:49,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:49,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 371 [2022-12-13 22:24:49,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:24:50,087 INFO L130 PetriNetUnfolder]: 1105/1879 cut-off events. [2022-12-13 22:24:50,087 INFO L131 PetriNetUnfolder]: For 788/788 co-relation queries the response was YES. [2022-12-13 22:24:50,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4428 conditions, 1879 events. 1105/1879 cut-off events. For 788/788 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9991 event pairs, 0 based on Foata normal form. 0/1878 useless extension candidates. Maximal degree in co-relation 4417. Up to 1030 conditions per place. [2022-12-13 22:24:50,094 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 46 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-12-13 22:24:50,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 54 transitions, 251 flow [2022-12-13 22:24:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:24:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:24:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1026 transitions. [2022-12-13 22:24:50,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2022-12-13 22:24:50,099 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1026 transitions. [2022-12-13 22:24:50,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1026 transitions. [2022-12-13 22:24:50,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:24:50,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1026 transitions. [2022-12-13 22:24:50,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 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) [2022-12-13 22:24:50,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 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) [2022-12-13 22:24:50,109 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 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) [2022-12-13 22:24:50,109 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 170 flow. Second operand 6 states and 1026 transitions. [2022-12-13 22:24:50,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 54 transitions, 251 flow [2022-12-13 22:24:50,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 54 transitions, 243 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 22:24:50,114 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 81 flow [2022-12-13 22:24:50,114 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=81, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2022-12-13 22:24:50,115 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, -10 predicate places. [2022-12-13 22:24:50,115 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 81 flow [2022-12-13 22:24:50,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.85714285714286) internal successors, (1154), 7 states have internal predecessors, (1154), 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) [2022-12-13 22:24:50,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:50,116 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 22:24:50,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:24:50,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:24:50,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 22:24:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1771768147, now seen corresponding path program 1 times [2022-12-13 22:24:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:50,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111054931] [2022-12-13 22:24:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:24:50,339 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:24:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:24:50,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:24:50,357 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:24:50,357 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 22:24:50,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 22:24:50,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 22:24:50,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 22:24:50,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 22:24:50,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 22:24:50,358 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 22:24:50,359 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 22:24:50,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 22:24:50,383 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 22:24:50,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 218 transitions, 480 flow [2022-12-13 22:24:50,497 INFO L130 PetriNetUnfolder]: 99/731 cut-off events. [2022-12-13 22:24:50,497 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 22:24:50,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 731 events. 99/731 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3243 event pairs, 6 based on Foata normal form. 0/628 useless extension candidates. Maximal degree in co-relation 525. Up to 32 conditions per place. [2022-12-13 22:24:50,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 218 transitions, 480 flow [2022-12-13 22:24:50,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 218 transitions, 480 flow [2022-12-13 22:24:50,507 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:24:50,507 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 218 transitions, 480 flow [2022-12-13 22:24:50,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 218 transitions, 480 flow [2022-12-13 22:24:50,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 218 transitions, 480 flow [2022-12-13 22:24:50,580 INFO L130 PetriNetUnfolder]: 99/731 cut-off events. [2022-12-13 22:24:50,580 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 22:24:50,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 731 events. 99/731 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3243 event pairs, 6 based on Foata normal form. 0/628 useless extension candidates. Maximal degree in co-relation 525. Up to 32 conditions per place. [2022-12-13 22:24:50,596 INFO L119 LiptonReduction]: Number of co-enabled transitions 21736 [2022-12-13 22:24:53,296 INFO L134 LiptonReduction]: Checked pairs total: 37663 [2022-12-13 22:24:53,296 INFO L136 LiptonReduction]: Total number of compositions: 193 [2022-12-13 22:24:53,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:24:53,297 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;@8a6e18b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:24:53,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 22:24:53,300 INFO L130 PetriNetUnfolder]: 5/24 cut-off events. [2022-12-13 22:24:53,300 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:24:53,300 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:53,300 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 22:24:53,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 22:24:53,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:53,301 INFO L85 PathProgramCache]: Analyzing trace with hash -503995636, now seen corresponding path program 1 times [2022-12-13 22:24:53,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:53,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071219186] [2022-12-13 22:24:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:53,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:24:53,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:24:53,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071219186] [2022-12-13 22:24:53,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071219186] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:24:53,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:24:53,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:24:53,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950579849] [2022-12-13 22:24:53,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:24:53,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:24:53,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:24:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:24:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:24:53,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 411 [2022-12-13 22:24:53,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 68 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 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) [2022-12-13 22:24:53,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:53,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 411 [2022-12-13 22:24:53,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:08,695 INFO L130 PetriNetUnfolder]: 192659/266625 cut-off events. [2022-12-13 22:25:08,695 INFO L131 PetriNetUnfolder]: For 8984/8984 co-relation queries the response was YES. [2022-12-13 22:25:09,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529832 conditions, 266625 events. 192659/266625 cut-off events. For 8984/8984 co-relation queries the response was YES. Maximal size of possible extension queue 5402. Compared 1900766 event pairs, 91390 based on Foata normal form. 14242/245529 useless extension candidates. Maximal degree in co-relation 66252. Up to 136158 conditions per place. [2022-12-13 22:25:09,768 INFO L137 encePairwiseOnDemand]: 385/411 looper letters, 77 selfloop transitions, 7 changer transitions 0/89 dead transitions. [2022-12-13 22:25:09,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 402 flow [2022-12-13 22:25:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-12-13 22:25:09,770 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5385239253852393 [2022-12-13 22:25:09,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-12-13 22:25:09,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-12-13 22:25:09,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:09,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-12-13 22:25:09,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 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) [2022-12-13 22:25:09,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 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) [2022-12-13 22:25:09,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 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) [2022-12-13 22:25:09,776 INFO L175 Difference]: Start difference. First operand has 56 places, 68 transitions, 180 flow. Second operand 3 states and 664 transitions. [2022-12-13 22:25:09,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 402 flow [2022-12-13 22:25:09,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 89 transitions, 402 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:25:09,780 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 210 flow [2022-12-13 22:25:09,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2022-12-13 22:25:09,781 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2022-12-13 22:25:09,781 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 210 flow [2022-12-13 22:25:09,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 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) [2022-12-13 22:25:09,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:09,781 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:09,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 22:25:09,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 22:25:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:09,782 INFO L85 PathProgramCache]: Analyzing trace with hash 16695974, now seen corresponding path program 1 times [2022-12-13 22:25:09,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:09,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474676015] [2022-12-13 22:25:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:09,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:09,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:09,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474676015] [2022-12-13 22:25:09,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474676015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:09,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091273123] [2022-12-13 22:25:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:09,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:09,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:09,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:09,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:25:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:09,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 22:25:09,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:09,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:09,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091273123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:09,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:09,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 22:25:09,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650893578] [2022-12-13 22:25:09,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:09,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:25:09,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:09,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:25:09,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:25:09,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 411 [2022-12-13 22:25:09,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 182.85714285714286) internal successors, (1280), 7 states have internal predecessors, (1280), 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) [2022-12-13 22:25:09,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:09,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 411 [2022-12-13 22:25:09,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:24,582 INFO L130 PetriNetUnfolder]: 177696/246138 cut-off events. [2022-12-13 22:25:24,582 INFO L131 PetriNetUnfolder]: For 78908/78908 co-relation queries the response was YES. [2022-12-13 22:25:24,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564779 conditions, 246138 events. 177696/246138 cut-off events. For 78908/78908 co-relation queries the response was YES. Maximal size of possible extension queue 5080. Compared 1726843 event pairs, 27441 based on Foata normal form. 0/230182 useless extension candidates. Maximal degree in co-relation 130177. Up to 226067 conditions per place. [2022-12-13 22:25:25,483 INFO L137 encePairwiseOnDemand]: 407/411 looper letters, 104 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2022-12-13 22:25:25,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 115 transitions, 562 flow [2022-12-13 22:25:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:25:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:25:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1188 transitions. [2022-12-13 22:25:25,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48175182481751827 [2022-12-13 22:25:25,488 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1188 transitions. [2022-12-13 22:25:25,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1188 transitions. [2022-12-13 22:25:25,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:25,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1188 transitions. [2022-12-13 22:25:25,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 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) [2022-12-13 22:25:25,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 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) [2022-12-13 22:25:25,494 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 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) [2022-12-13 22:25:25,494 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 210 flow. Second operand 6 states and 1188 transitions. [2022-12-13 22:25:25,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 115 transitions, 562 flow [2022-12-13 22:25:25,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 115 transitions, 548 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:25:25,695 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 238 flow [2022-12-13 22:25:25,696 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2022-12-13 22:25:25,696 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2022-12-13 22:25:25,696 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 238 flow [2022-12-13 22:25:25,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.85714285714286) internal successors, (1280), 7 states have internal predecessors, (1280), 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) [2022-12-13 22:25:25,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:25,697 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:25,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:25:25,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 22:25:25,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 22:25:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:25,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1675292677, now seen corresponding path program 1 times [2022-12-13 22:25:25,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989931629] [2022-12-13 22:25:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:25,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:25:25,944 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:25:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:25:25,963 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:25:25,963 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:25:25,964 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 22:25:25,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 22:25:25,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 22:25:25,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 22:25:25,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 22:25:25,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 22:25:25,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 22:25:25,965 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 22:25:25,965 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 22:25:25,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 22:25:25,983 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 22:25:25,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 242 transitions, 544 flow [2022-12-13 22:25:26,081 INFO L130 PetriNetUnfolder]: 161/1097 cut-off events. [2022-12-13 22:25:26,082 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 22:25:26,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 1097 events. 161/1097 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5492 event pairs, 23 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 776. Up to 80 conditions per place. [2022-12-13 22:25:26,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 242 transitions, 544 flow [2022-12-13 22:25:26,090 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 242 transitions, 544 flow [2022-12-13 22:25:26,090 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:25:26,090 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 242 transitions, 544 flow [2022-12-13 22:25:26,091 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 242 transitions, 544 flow [2022-12-13 22:25:26,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 242 transitions, 544 flow [2022-12-13 22:25:26,182 INFO L130 PetriNetUnfolder]: 161/1097 cut-off events. [2022-12-13 22:25:26,182 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 22:25:26,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 1097 events. 161/1097 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5492 event pairs, 23 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 776. Up to 80 conditions per place. [2022-12-13 22:25:26,206 INFO L119 LiptonReduction]: Number of co-enabled transitions 29920 [2022-12-13 22:25:28,893 INFO L134 LiptonReduction]: Checked pairs total: 57825 [2022-12-13 22:25:28,893 INFO L136 LiptonReduction]: Total number of compositions: 218 [2022-12-13 22:25:28,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:25:28,894 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;@8a6e18b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:25:28,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 22:25:28,896 INFO L130 PetriNetUnfolder]: 7/28 cut-off events. [2022-12-13 22:25:28,896 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:25:28,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:28,896 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 22:25:28,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 22:25:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash 917601178, now seen corresponding path program 1 times [2022-12-13 22:25:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:28,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379857555] [2022-12-13 22:25:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:28,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:28,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379857555] [2022-12-13 22:25:28,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379857555] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:28,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:28,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:25:28,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209246637] [2022-12-13 22:25:28,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:28,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:25:28,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:28,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:25:28,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:25:28,936 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 460 [2022-12-13 22:25:28,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 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) [2022-12-13 22:25:28,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:28,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 460 [2022-12-13 22:25:28,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:27:17,680 INFO L130 PetriNetUnfolder]: 1287625/1684724 cut-off events. [2022-12-13 22:27:17,680 INFO L131 PetriNetUnfolder]: For 70634/70634 co-relation queries the response was YES. [2022-12-13 22:27:20,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3368243 conditions, 1684724 events. 1287625/1684724 cut-off events. For 70634/70634 co-relation queries the response was YES. Maximal size of possible extension queue 34316. Compared 12834269 event pairs, 629860 based on Foata normal form. 196347/1656079 useless extension candidates. Maximal degree in co-relation 383447. Up to 876234 conditions per place. [2022-12-13 22:27:24,744 INFO L137 encePairwiseOnDemand]: 430/460 looper letters, 86 selfloop transitions, 8 changer transitions 0/101 dead transitions. [2022-12-13 22:27:24,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 465 flow [2022-12-13 22:27:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:27:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:27:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2022-12-13 22:27:24,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5311594202898551 [2022-12-13 22:27:24,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2022-12-13 22:27:24,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2022-12-13 22:27:24,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:27:24,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2022-12-13 22:27:24,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 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) [2022-12-13 22:27:24,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 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) [2022-12-13 22:27:24,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 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) [2022-12-13 22:27:24,753 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 216 flow. Second operand 3 states and 733 transitions. [2022-12-13 22:27:24,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 465 flow [2022-12-13 22:27:24,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 465 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:27:24,761 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 252 flow [2022-12-13 22:27:24,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2022-12-13 22:27:24,761 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2022-12-13 22:27:24,761 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 252 flow [2022-12-13 22:27:24,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 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) [2022-12-13 22:27:24,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:27:24,762 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:27:24,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 22:27:24,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 22:27:24,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:27:24,762 INFO L85 PathProgramCache]: Analyzing trace with hash -294572781, now seen corresponding path program 1 times [2022-12-13 22:27:24,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:27:24,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784350521] [2022-12-13 22:27:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:27:24,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:27:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:27:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:24,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:27:24,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784350521] [2022-12-13 22:27:24,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784350521] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:27:24,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457988032] [2022-12-13 22:27:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:27:24,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:27:24,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:27:24,805 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:27:24,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d8f5223-1a14-4e9f-9f0e-44f502725939/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:27:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:27:24,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 22:27:24,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:27:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:24,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:27:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:24,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457988032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:27:24,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:27:24,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 22:27:24,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601256267] [2022-12-13 22:27:24,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:27:24,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:27:24,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:27:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:27:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:27:24,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 460 [2022-12-13 22:27:24,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 200.85714285714286) internal successors, (1406), 7 states have internal predecessors, (1406), 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) [2022-12-13 22:27:24,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:27:24,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 460 [2022-12-13 22:27:24,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand