./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_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_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/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_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/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_060b2b37-0d7f-4e92-88da-210e72efe795/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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- 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 14:43:00,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:43:00,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:43:00,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:43:00,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:43:00,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:43:00,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:43:00,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:43:00,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:43:00,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:43:00,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:43:00,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:43:00,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:43:00,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:43:00,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:43:00,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:43:00,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:43:00,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:43:00,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:43:00,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:43:00,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:43:00,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:43:00,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:43:00,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:43:00,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:43:00,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:43:00,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:43:00,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:43:00,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:43:00,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:43:00,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:43:00,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:43:00,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:43:00,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:43:00,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:43:00,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:43:00,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:43:00,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:43:00,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:43:00,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:43:00,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:43:00,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:43:00,344 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:43:00,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:43:00,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:43:00,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:43:00,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:43:00,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:43:00,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:43:00,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:43:00,346 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:43:00,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:43:00,347 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:43:00,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:43:00,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:43:00,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:43:00,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:43:00,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:43:00,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:43:00,348 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:43:00,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:43:00,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:43:00,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:43:00,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:43:00,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:43:00,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:43:00,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:43:00,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:43:00,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:43:00,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:43:00,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:43:00,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:43:00,351 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:43:00,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:43:00,351 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:43:00,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:43:00,352 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:43:00,352 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_060b2b37-0d7f-4e92-88da-210e72efe795/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2022-12-13 14:43:00,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:43:00,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:43:00,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:43:00,561 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:43:00,561 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:43:00,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-12-13 14:43:03,107 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:43:03,254 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:43:03,255 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-12-13 14:43:03,262 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/data/49f0cf729/5d216cc428c74cd593c331fe485637a7/FLAG43e6a2477 [2022-12-13 14:43:03,276 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/data/49f0cf729/5d216cc428c74cd593c331fe485637a7 [2022-12-13 14:43:03,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:43:03,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:43:03,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:43:03,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:43:03,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:43:03,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d331aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03, skipping insertion in model container [2022-12-13 14:43:03,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:43:03,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:43:03,535 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_060b2b37-0d7f-4e92-88da-210e72efe795/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-12-13 14:43:03,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:43:03,558 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:43:03,580 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_060b2b37-0d7f-4e92-88da-210e72efe795/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-12-13 14:43:03,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:43:03,605 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:43:03,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03 WrapperNode [2022-12-13 14:43:03,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:43:03,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:43:03,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:43:03,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:43:03,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,634 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-12-13 14:43:03,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:43:03,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:43:03,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:43:03,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:43:03,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,651 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:43:03,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:43:03,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:43:03,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:43:03,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (1/1) ... [2022-12-13 14:43:03,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:43:03,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:43:03,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:43:03,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:43:03,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:43:03,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:43:03,711 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 14:43:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:43:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:43:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 14:43:03,712 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 14:43:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:43:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:43:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:43:03,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:43:03,714 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 14:43:03,819 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:43:03,820 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:43:03,996 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:43:04,004 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:43:04,005 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-13 14:43:04,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:43:04 BoogieIcfgContainer [2022-12-13 14:43:04,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:43:04,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:43:04,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:43:04,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:43:04,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:43:03" (1/3) ... [2022-12-13 14:43:04,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710e66d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:43:04, skipping insertion in model container [2022-12-13 14:43:04,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:43:03" (2/3) ... [2022-12-13 14:43:04,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710e66d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:43:04, skipping insertion in model container [2022-12-13 14:43:04,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:43:04" (3/3) ... [2022-12-13 14:43:04,016 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2022-12-13 14:43:04,025 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 14:43:04,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:43:04,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 14:43:04,036 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:43:04,085 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 14:43:04,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 211 flow [2022-12-13 14:43:04,158 INFO L130 PetriNetUnfolder]: 14/134 cut-off events. [2022-12-13 14:43:04,159 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:43:04,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 293 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-12-13 14:43:04,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 103 transitions, 211 flow [2022-12-13 14:43:04,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 103 transitions, 211 flow [2022-12-13 14:43:04,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:43:04,177 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 103 transitions, 211 flow [2022-12-13 14:43:04,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 103 transitions, 211 flow [2022-12-13 14:43:04,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 211 flow [2022-12-13 14:43:04,203 INFO L130 PetriNetUnfolder]: 14/134 cut-off events. [2022-12-13 14:43:04,203 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:43:04,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 293 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-12-13 14:43:04,205 INFO L119 LiptonReduction]: Number of co-enabled transitions 2368 [2022-12-13 14:43:06,226 INFO L134 LiptonReduction]: Checked pairs total: 4123 [2022-12-13 14:43:06,227 INFO L136 LiptonReduction]: Total number of compositions: 89 [2022-12-13 14:43:06,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:43:06,242 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;@676cf1d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:43:06,242 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:43:06,244 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 14:43:06,244 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:43:06,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:06,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:43:06,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:43:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash 12301686, now seen corresponding path program 1 times [2022-12-13 14:43:06,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:06,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614560325] [2022-12-13 14:43:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:06,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:06,411 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 14:43:06,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614560325] [2022-12-13 14:43:06,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614560325] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:43:06,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:43:06,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:43:06,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279454644] [2022-12-13 14:43:06,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:43:06,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:43:06,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:43:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:43:06,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:43:06,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 192 [2022-12-13 14:43:06,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 29 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 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 14:43:06,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:43:06,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 192 [2022-12-13 14:43:06,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:43:06,526 INFO L130 PetriNetUnfolder]: 63/157 cut-off events. [2022-12-13 14:43:06,526 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:43:06,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 157 events. 63/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 614 event pairs, 0 based on Foata normal form. 16/153 useless extension candidates. Maximal degree in co-relation 286. Up to 134 conditions per place. [2022-12-13 14:43:06,529 INFO L137 encePairwiseOnDemand]: 181/192 looper letters, 24 selfloop transitions, 2 changer transitions 2/31 dead transitions. [2022-12-13 14:43:06,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 123 flow [2022-12-13 14:43:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:43:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:43:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2022-12-13 14:43:06,541 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2022-12-13 14:43:06,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2022-12-13 14:43:06,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2022-12-13 14:43:06,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:43:06,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2022-12-13 14:43:06,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 14:43:06,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 14:43:06,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 14:43:06,557 INFO L175 Difference]: Start difference. First operand has 24 places, 29 transitions, 63 flow. Second operand 3 states and 304 transitions. [2022-12-13 14:43:06,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 123 flow [2022-12-13 14:43:06,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:43:06,561 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 51 flow [2022-12-13 14:43:06,562 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2022-12-13 14:43:06,565 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2022-12-13 14:43:06,565 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 51 flow [2022-12-13 14:43:06,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 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 14:43:06,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:06,565 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 14:43:06,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:43:06,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:43:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:06,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1043073936, now seen corresponding path program 1 times [2022-12-13 14:43:06,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:06,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884642602] [2022-12-13 14:43:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:06,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:43:06,605 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:43:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:43:06,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:43:06,639 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:43:06,641 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 14:43:06,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 14:43:06,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:43:06,644 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 14:43:06,646 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:43:06,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 14:43:06,662 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 14:43:06,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 284 flow [2022-12-13 14:43:06,696 INFO L130 PetriNetUnfolder]: 24/203 cut-off events. [2022-12-13 14:43:06,696 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:43:06,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 546 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2022-12-13 14:43:06,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 136 transitions, 284 flow [2022-12-13 14:43:06,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 136 transitions, 284 flow [2022-12-13 14:43:06,700 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:43:06,700 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 136 transitions, 284 flow [2022-12-13 14:43:06,701 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 136 transitions, 284 flow [2022-12-13 14:43:06,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 284 flow [2022-12-13 14:43:06,724 INFO L130 PetriNetUnfolder]: 24/203 cut-off events. [2022-12-13 14:43:06,724 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:43:06,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 546 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2022-12-13 14:43:06,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 6848 [2022-12-13 14:43:08,556 INFO L134 LiptonReduction]: Checked pairs total: 13557 [2022-12-13 14:43:08,556 INFO L136 LiptonReduction]: Total number of compositions: 107 [2022-12-13 14:43:08,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:43:08,558 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;@676cf1d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:43:08,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:43:08,560 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 14:43:08,560 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:43:08,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:08,560 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:43:08,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:43:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash 20793114, now seen corresponding path program 1 times [2022-12-13 14:43:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:08,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097808973] [2022-12-13 14:43:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:08,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:08,593 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 14:43:08,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:08,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097808973] [2022-12-13 14:43:08,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097808973] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:43:08,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:43:08,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:43:08,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725788585] [2022-12-13 14:43:08,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:43:08,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:43:08,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:43:08,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:43:08,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:43:08,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 243 [2022-12-13 14:43:08,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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 14:43:08,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:43:08,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 243 [2022-12-13 14:43:08,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:43:08,810 INFO L130 PetriNetUnfolder]: 1271/2276 cut-off events. [2022-12-13 14:43:08,810 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-13 14:43:08,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4405 conditions, 2276 events. 1271/2276 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12748 event pairs, 560 based on Foata normal form. 320/2356 useless extension candidates. Maximal degree in co-relation 419. Up to 2062 conditions per place. [2022-12-13 14:43:08,817 INFO L137 encePairwiseOnDemand]: 226/243 looper letters, 34 selfloop transitions, 2 changer transitions 2/45 dead transitions. [2022-12-13 14:43:08,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 178 flow [2022-12-13 14:43:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:43:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:43:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2022-12-13 14:43:08,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5459533607681756 [2022-12-13 14:43:08,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2022-12-13 14:43:08,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2022-12-13 14:43:08,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:43:08,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2022-12-13 14:43:08,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 14:43:08,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 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 14:43:08,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 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 14:43:08,826 INFO L175 Difference]: Start difference. First operand has 39 places, 48 transitions, 108 flow. Second operand 3 states and 398 transitions. [2022-12-13 14:43:08,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 178 flow [2022-12-13 14:43:08,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 176 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 14:43:08,828 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 86 flow [2022-12-13 14:43:08,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2022-12-13 14:43:08,828 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2022-12-13 14:43:08,828 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 86 flow [2022-12-13 14:43:08,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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 14:43:08,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:08,829 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:43:08,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:43:08,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:43:08,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1554147492, now seen corresponding path program 1 times [2022-12-13 14:43:08,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:08,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706585837] [2022-12-13 14:43:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:08,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:08,889 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 14:43:08,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:08,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706585837] [2022-12-13 14:43:08,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706585837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:43:08,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915943295] [2022-12-13 14:43:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:08,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:43:08,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:43:08,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:43:08,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:43:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:08,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:43:08,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:43:08,980 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 14:43:08,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:43:08,995 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 14:43:08,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915943295] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:43:08,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:43:08,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:43:08,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821205984] [2022-12-13 14:43:08,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:43:08,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:43:08,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:43:08,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:43:08,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:43:09,013 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 243 [2022-12-13 14:43:09,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 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 14:43:09,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:43:09,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 243 [2022-12-13 14:43:09,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:43:09,150 INFO L130 PetriNetUnfolder]: 421/832 cut-off events. [2022-12-13 14:43:09,150 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-12-13 14:43:09,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794 conditions, 832 events. 421/832 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4214 event pairs, 80 based on Foata normal form. 100/930 useless extension candidates. Maximal degree in co-relation 1540. Up to 502 conditions per place. [2022-12-13 14:43:09,153 INFO L137 encePairwiseOnDemand]: 240/243 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2022-12-13 14:43:09,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 236 flow [2022-12-13 14:43:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:43:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:43:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2022-12-13 14:43:09,155 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5045267489711934 [2022-12-13 14:43:09,155 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2022-12-13 14:43:09,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2022-12-13 14:43:09,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:43:09,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2022-12-13 14:43:09,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 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 14:43:09,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 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 14:43:09,159 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 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 14:43:09,159 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 86 flow. Second operand 5 states and 613 transitions. [2022-12-13 14:43:09,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 236 flow [2022-12-13 14:43:09,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:43:09,161 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-12-13 14:43:09,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 14:43:09,162 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2022-12-13 14:43:09,162 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-12-13 14:43:09,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 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 14:43:09,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:09,162 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 14:43:09,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:43:09,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:43:09,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:43:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:09,364 INFO L85 PathProgramCache]: Analyzing trace with hash 601740826, now seen corresponding path program 1 times [2022-12-13 14:43:09,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:09,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535952318] [2022-12-13 14:43:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:09,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:43:09,382 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:43:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:43:09,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:43:09,400 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:43:09,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 14:43:09,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 14:43:09,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:43:09,400 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 14:43:09,401 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:43:09,401 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 14:43:09,420 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 14:43:09,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 359 flow [2022-12-13 14:43:09,448 INFO L130 PetriNetUnfolder]: 34/272 cut-off events. [2022-12-13 14:43:09,448 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 14:43:09,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 796 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2022-12-13 14:43:09,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 169 transitions, 359 flow [2022-12-13 14:43:09,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 169 transitions, 359 flow [2022-12-13 14:43:09,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:43:09,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 169 transitions, 359 flow [2022-12-13 14:43:09,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 169 transitions, 359 flow [2022-12-13 14:43:09,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 359 flow [2022-12-13 14:43:09,473 INFO L130 PetriNetUnfolder]: 34/272 cut-off events. [2022-12-13 14:43:09,473 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 14:43:09,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 796 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2022-12-13 14:43:09,479 INFO L119 LiptonReduction]: Number of co-enabled transitions 13440 [2022-12-13 14:43:11,875 INFO L134 LiptonReduction]: Checked pairs total: 27430 [2022-12-13 14:43:11,875 INFO L136 LiptonReduction]: Total number of compositions: 127 [2022-12-13 14:43:11,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:43:11,877 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;@676cf1d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:43:11,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:43:11,878 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 14:43:11,878 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:43:11,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:11,879 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:43:11,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:43:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash 30910140, now seen corresponding path program 1 times [2022-12-13 14:43:11,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:11,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638653106] [2022-12-13 14:43:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:11,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:11,899 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 14:43:11,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:11,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638653106] [2022-12-13 14:43:11,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638653106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:43:11,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:43:11,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:43:11,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857350171] [2022-12-13 14:43:11,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:43:11,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:43:11,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:43:11,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:43:11,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:43:11,908 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 296 [2022-12-13 14:43:11,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 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 14:43:11,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:43:11,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 296 [2022-12-13 14:43:11,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:43:13,768 INFO L130 PetriNetUnfolder]: 17895/26602 cut-off events. [2022-12-13 14:43:13,769 INFO L131 PetriNetUnfolder]: For 597/597 co-relation queries the response was YES. [2022-12-13 14:43:13,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52210 conditions, 26602 events. 17895/26602 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 173753 event pairs, 17081 based on Foata normal form. 4496/29060 useless extension candidates. Maximal degree in co-relation 20257. Up to 25159 conditions per place. [2022-12-13 14:43:13,845 INFO L137 encePairwiseOnDemand]: 273/296 looper letters, 42 selfloop transitions, 2 changer transitions 2/56 dead transitions. [2022-12-13 14:43:13,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 225 flow [2022-12-13 14:43:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:43:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:43:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-12-13 14:43:13,846 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5518018018018018 [2022-12-13 14:43:13,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-12-13 14:43:13,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-12-13 14:43:13,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:43:13,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-12-13 14:43:13,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:43:13,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 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 14:43:13,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 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 14:43:13,849 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 153 flow. Second operand 3 states and 490 transitions. [2022-12-13 14:43:13,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 225 flow [2022-12-13 14:43:13,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 219 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-13 14:43:13,851 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 115 flow [2022-12-13 14:43:13,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2022-12-13 14:43:13,852 INFO L288 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2022-12-13 14:43:13,852 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 115 flow [2022-12-13 14:43:13,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 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 14:43:13,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:13,852 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:43:13,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:43:13,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:43:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:13,853 INFO L85 PathProgramCache]: Analyzing trace with hash 438872300, now seen corresponding path program 1 times [2022-12-13 14:43:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:13,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559619945] [2022-12-13 14:43:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:13,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:13,893 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 14:43:13,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:13,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559619945] [2022-12-13 14:43:13,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559619945] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:43:13,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122786902] [2022-12-13 14:43:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:13,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:43:13,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:43:13,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:43:13,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:43:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:43:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:43:13,958 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 14:43:13,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:43:13,971 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 14:43:13,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122786902] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:43:13,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:43:13,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:43:13,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152159935] [2022-12-13 14:43:13,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:43:13,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:43:13,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:43:13,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:43:13,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:43:13,987 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 296 [2022-12-13 14:43:13,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 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 14:43:13,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:43:13,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 296 [2022-12-13 14:43:13,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:43:14,867 INFO L130 PetriNetUnfolder]: 6205/10135 cut-off events. [2022-12-13 14:43:14,867 INFO L131 PetriNetUnfolder]: For 1008/1008 co-relation queries the response was YES. [2022-12-13 14:43:14,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21104 conditions, 10135 events. 6205/10135 cut-off events. For 1008/1008 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 67587 event pairs, 0 based on Foata normal form. 909/11043 useless extension candidates. Maximal degree in co-relation 2406. Up to 5958 conditions per place. [2022-12-13 14:43:14,897 INFO L137 encePairwiseOnDemand]: 293/296 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2022-12-13 14:43:14,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 389 flow [2022-12-13 14:43:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:43:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:43:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 917 transitions. [2022-12-13 14:43:14,899 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5163288288288288 [2022-12-13 14:43:14,899 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 917 transitions. [2022-12-13 14:43:14,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 917 transitions. [2022-12-13 14:43:14,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:43:14,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 917 transitions. [2022-12-13 14:43:14,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 152.83333333333334) internal successors, (917), 6 states have internal predecessors, (917), 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 14:43:14,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 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 14:43:14,903 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 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 14:43:14,904 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 115 flow. Second operand 6 states and 917 transitions. [2022-12-13 14:43:14,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 389 flow [2022-12-13 14:43:14,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:43:14,905 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-12-13 14:43:14,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 14:43:14,906 INFO L288 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2022-12-13 14:43:14,906 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-12-13 14:43:14,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 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 14:43:14,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:14,906 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 14:43:14,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 14:43:15,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 14:43:15,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:43:15,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:15,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1007454109, now seen corresponding path program 1 times [2022-12-13 14:43:15,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:15,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102369456] [2022-12-13 14:43:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:15,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:43:15,117 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:43:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:43:15,127 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:43:15,127 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:43:15,127 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 14:43:15,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 14:43:15,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 14:43:15,127 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 14:43:15,128 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:43:15,128 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 14:43:15,144 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 14:43:15,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 436 flow [2022-12-13 14:43:15,171 INFO L130 PetriNetUnfolder]: 44/341 cut-off events. [2022-12-13 14:43:15,171 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 14:43:15,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 341 events. 44/341 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1065 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2022-12-13 14:43:15,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 202 transitions, 436 flow [2022-12-13 14:43:15,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 202 transitions, 436 flow [2022-12-13 14:43:15,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:43:15,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 202 transitions, 436 flow [2022-12-13 14:43:15,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 202 transitions, 436 flow [2022-12-13 14:43:15,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 436 flow [2022-12-13 14:43:15,200 INFO L130 PetriNetUnfolder]: 44/341 cut-off events. [2022-12-13 14:43:15,200 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 14:43:15,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 341 events. 44/341 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1065 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2022-12-13 14:43:15,210 INFO L119 LiptonReduction]: Number of co-enabled transitions 22144 [2022-12-13 14:43:17,748 INFO L134 LiptonReduction]: Checked pairs total: 49807 [2022-12-13 14:43:17,748 INFO L136 LiptonReduction]: Total number of compositions: 147 [2022-12-13 14:43:17,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:43:17,750 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;@676cf1d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:43:17,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:43:17,751 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 14:43:17,751 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:43:17,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:17,752 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:43:17,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:43:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash 42668632, now seen corresponding path program 1 times [2022-12-13 14:43:17,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:17,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476981283] [2022-12-13 14:43:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:17,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:17,775 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 14:43:17,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:17,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476981283] [2022-12-13 14:43:17,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476981283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:43:17,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:43:17,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:43:17,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702699178] [2022-12-13 14:43:17,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:43:17,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:43:17,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:43:17,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:43:17,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:43:17,784 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 349 [2022-12-13 14:43:17,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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 14:43:17,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:43:17,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 349 [2022-12-13 14:43:17,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:43:48,882 INFO L130 PetriNetUnfolder]: 400899/521193 cut-off events. [2022-12-13 14:43:48,882 INFO L131 PetriNetUnfolder]: For 13849/13849 co-relation queries the response was YES. [2022-12-13 14:43:49,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046498 conditions, 521193 events. 400899/521193 cut-off events. For 13849/13849 co-relation queries the response was YES. Maximal size of possible extension queue 9201. Compared 3395364 event pairs, 389180 based on Foata normal form. 54304/545173 useless extension candidates. Maximal degree in co-relation 83600. Up to 518010 conditions per place. [2022-12-13 14:43:50,564 INFO L137 encePairwiseOnDemand]: 320/349 looper letters, 58 selfloop transitions, 2 changer transitions 2/69 dead transitions. [2022-12-13 14:43:50,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 294 flow [2022-12-13 14:43:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:43:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:43:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2022-12-13 14:43:50,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5635148042024832 [2022-12-13 14:43:50,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2022-12-13 14:43:50,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2022-12-13 14:43:50,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:43:50,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2022-12-13 14:43:50,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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 14:43:50,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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 14:43:50,570 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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 14:43:50,570 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 200 flow. Second operand 3 states and 590 transitions. [2022-12-13 14:43:50,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 294 flow [2022-12-13 14:43:50,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 282 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-13 14:43:50,578 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 144 flow [2022-12-13 14:43:50,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2022-12-13 14:43:50,579 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2022-12-13 14:43:50,579 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 144 flow [2022-12-13 14:43:50,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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 14:43:50,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:50,579 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:43:50,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 14:43:50,579 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:43:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:50,580 INFO L85 PathProgramCache]: Analyzing trace with hash -262188519, now seen corresponding path program 1 times [2022-12-13 14:43:50,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:50,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597479346] [2022-12-13 14:43:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:50,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:50,610 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 14:43:50,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:50,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597479346] [2022-12-13 14:43:50,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597479346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:43:50,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431140509] [2022-12-13 14:43:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:50,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:43:50,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:43:50,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:43:50,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:43:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:50,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:43:50,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:43:50,679 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 14:43:50,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:43:50,693 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 14:43:50,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431140509] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:43:50,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:43:50,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:43:50,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138478485] [2022-12-13 14:43:50,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:43:50,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:43:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:43:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:43:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:43:50,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 349 [2022-12-13 14:43:50,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 166.28571428571428) internal successors, (1164), 7 states have internal predecessors, (1164), 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 14:43:50,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:43:50,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 349 [2022-12-13 14:43:50,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:44:11,137 INFO L130 PetriNetUnfolder]: 286856/375777 cut-off events. [2022-12-13 14:44:11,137 INFO L131 PetriNetUnfolder]: For 15992/15992 co-relation queries the response was YES. [2022-12-13 14:44:11,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779656 conditions, 375777 events. 286856/375777 cut-off events. For 15992/15992 co-relation queries the response was YES. Maximal size of possible extension queue 7018. Compared 2500947 event pairs, 12196 based on Foata normal form. 1330/377106 useless extension candidates. Maximal degree in co-relation 699944. Up to 246357 conditions per place. [2022-12-13 14:44:12,841 INFO L137 encePairwiseOnDemand]: 345/349 looper letters, 146 selfloop transitions, 6 changer transitions 0/159 dead transitions. [2022-12-13 14:44:12,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 159 transitions, 656 flow [2022-12-13 14:44:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:44:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:44:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1139 transitions. [2022-12-13 14:44:12,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.543935052531041 [2022-12-13 14:44:12,844 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1139 transitions. [2022-12-13 14:44:12,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1139 transitions. [2022-12-13 14:44:12,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:44:12,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1139 transitions. [2022-12-13 14:44:12,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 189.83333333333334) internal successors, (1139), 6 states have internal predecessors, (1139), 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 14:44:12,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 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 14:44:12,849 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 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 14:44:12,849 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 144 flow. Second operand 6 states and 1139 transitions. [2022-12-13 14:44:12,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 159 transitions, 656 flow [2022-12-13 14:44:12,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 159 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:44:12,853 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2022-12-13 14:44:12,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2022-12-13 14:44:12,853 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2022-12-13 14:44:12,853 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2022-12-13 14:44:12,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.28571428571428) internal successors, (1164), 7 states have internal predecessors, (1164), 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 14:44:12,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:12,854 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 14:44:12,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:44:13,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060b2b37-0d7f-4e92-88da-210e72efe795/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 14:44:13,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:44:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1869370003, now seen corresponding path program 1 times [2022-12-13 14:44:13,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:13,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039505830] [2022-12-13 14:44:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:13,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:44:13,086 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:44:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:44:13,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:44:13,101 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:44:13,101 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 14:44:13,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 14:44:13,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 14:44:13,102 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 14:44:13,103 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:44:13,103 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 14:44:13,124 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 14:44:13,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 235 transitions, 515 flow [2022-12-13 14:44:13,159 INFO L130 PetriNetUnfolder]: 54/410 cut-off events. [2022-12-13 14:44:13,159 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 14:44:13,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 410 events. 54/410 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1302 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 354. Up to 12 conditions per place. [2022-12-13 14:44:13,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 235 transitions, 515 flow [2022-12-13 14:44:13,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 235 transitions, 515 flow [2022-12-13 14:44:13,163 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:44:13,163 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 235 transitions, 515 flow [2022-12-13 14:44:13,163 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 235 transitions, 515 flow [2022-12-13 14:44:13,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 235 transitions, 515 flow [2022-12-13 14:44:13,197 INFO L130 PetriNetUnfolder]: 54/410 cut-off events. [2022-12-13 14:44:13,197 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 14:44:13,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 410 events. 54/410 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1302 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 354. Up to 12 conditions per place. [2022-12-13 14:44:13,208 INFO L119 LiptonReduction]: Number of co-enabled transitions 32960 [2022-12-13 14:44:15,644 INFO L134 LiptonReduction]: Checked pairs total: 73176 [2022-12-13 14:44:15,644 INFO L136 LiptonReduction]: Total number of compositions: 165 [2022-12-13 14:44:15,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:44:15,646 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;@676cf1d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:44:15,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:44:15,647 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 14:44:15,647 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:44:15,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:15,647 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:44:15,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:44:15,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:15,648 INFO L85 PathProgramCache]: Analyzing trace with hash 55987105, now seen corresponding path program 1 times [2022-12-13 14:44:15,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:15,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986263449] [2022-12-13 14:44:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:15,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:44:15,669 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 14:44:15,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:44:15,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986263449] [2022-12-13 14:44:15,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986263449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:44:15,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:44:15,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:44:15,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878229623] [2022-12-13 14:44:15,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:44:15,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:44:15,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:44:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:44:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:44:15,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 400 [2022-12-13 14:44:15,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 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 14:44:15,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:44:15,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 400 [2022-12-13 14:44:15,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand