./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN --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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- 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-6b4ec56 [2022-11-20 11:46:29,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:46:29,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:46:29,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:46:29,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:46:29,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:46:29,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:46:29,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:46:29,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:46:29,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:46:29,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:46:29,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:46:29,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:46:29,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:46:29,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:46:29,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:46:29,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:46:29,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:46:29,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:46:29,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:46:29,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:46:29,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:46:29,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:46:29,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:46:29,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:46:29,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:46:29,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:46:29,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:46:29,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:46:29,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:46:29,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:46:29,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:46:29,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:46:29,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:46:29,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:46:29,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:46:29,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:46:29,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:46:29,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:46:29,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:46:29,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:46:29,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:46:29,444 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:46:29,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:46:29,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:46:29,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:46:29,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:46:29,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:46:29,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:46:29,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:46:29,449 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:46:29,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:46:29,451 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:46:29,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:46:29,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:46:29,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:46:29,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:46:29,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:46:29,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:46:29,453 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:46:29,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:46:29,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:46:29,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:46:29,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:46:29,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:46:29,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:46:29,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:46:29,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:46:29,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:46:29,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:46:29,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:46:29,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:46:29,456 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:46:29,456 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:46:29,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:46:29,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-11-20 11:46:29,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:46:29,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:46:29,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:46:29,844 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:46:29,844 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:46:29,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-20 11:46:33,546 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:46:33,816 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:46:33,817 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-20 11:46:33,829 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/data/551a287ef/583dcf45810243ac88d7a726e769e6f3/FLAG37e364b76 [2022-11-20 11:46:33,855 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/data/551a287ef/583dcf45810243ac88d7a726e769e6f3 [2022-11-20 11:46:33,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:46:33,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:46:33,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:46:33,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:46:33,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:46:33,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:46:33" (1/1) ... [2022-11-20 11:46:33,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261f49c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:33, skipping insertion in model container [2022-11-20 11:46:33,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:46:33" (1/1) ... [2022-11-20 11:46:33,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:46:33,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:46:34,221 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_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-20 11:46:34,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:46:34,273 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:46:34,326 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_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-20 11:46:34,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:46:34,353 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:46:34,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34 WrapperNode [2022-11-20 11:46:34,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:46:34,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:46:34,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:46:34,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:46:34,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,425 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 282 [2022-11-20 11:46:34,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:46:34,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:46:34,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:46:34,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:46:34,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,507 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:46:34,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:46:34,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:46:34,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:46:34,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (1/1) ... [2022-11-20 11:46:34,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:46:34,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:34,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:46:34,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:46:34,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:46:34,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:46:34,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:46:34,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:46:34,648 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:46:34,649 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:46:34,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:46:34,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:46:34,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:46:34,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:46:34,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:46:34,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:46:34,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:46:34,653 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:46:34,853 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:46:34,856 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:46:35,550 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:46:35,565 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:46:35,579 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 11:46:35,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:46:35 BoogieIcfgContainer [2022-11-20 11:46:35,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:46:35,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:46:35,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:46:35,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:46:35,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:46:33" (1/3) ... [2022-11-20 11:46:35,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26467548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:46:35, skipping insertion in model container [2022-11-20 11:46:35,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:34" (2/3) ... [2022-11-20 11:46:35,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26467548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:46:35, skipping insertion in model container [2022-11-20 11:46:35,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:46:35" (3/3) ... [2022-11-20 11:46:35,619 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2022-11-20 11:46:35,629 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:46:35,642 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:46:35,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:46:35,643 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:46:35,832 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:46:35,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 353 places, 374 transitions, 764 flow [2022-11-20 11:46:36,063 INFO L130 PetriNetUnfolder]: 28/372 cut-off events. [2022-11-20 11:46:36,064 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:46:36,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 372 events. 28/372 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 359 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 293. Up to 2 conditions per place. [2022-11-20 11:46:36,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 353 places, 374 transitions, 764 flow [2022-11-20 11:46:36,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 342 places, 363 transitions, 738 flow [2022-11-20 11:46:36,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:46:36,103 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;@3f7c7cb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:46:36,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 11:46:36,272 INFO L130 PetriNetUnfolder]: 28/362 cut-off events. [2022-11-20 11:46:36,272 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:46:36,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:36,274 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:36,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:36,282 INFO L85 PathProgramCache]: Analyzing trace with hash 376588704, now seen corresponding path program 1 times [2022-11-20 11:46:36,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:36,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945540727] [2022-11-20 11:46:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:36,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:36,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:36,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945540727] [2022-11-20 11:46:36,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945540727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:36,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:36,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:36,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627535246] [2022-11-20 11:46:36,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:36,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:46:36,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:36,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:46:36,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:46:36,972 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 374 [2022-11-20 11:46:36,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 363 transitions, 738 flow. Second operand has 2 states, 2 states have (on average 353.0) internal successors, (706), 2 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:36,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:36,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 374 [2022-11-20 11:46:36,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:37,120 INFO L130 PetriNetUnfolder]: 8/343 cut-off events. [2022-11-20 11:46:37,121 INFO L131 PetriNetUnfolder]: For 8/9 co-relation queries the response was YES. [2022-11-20 11:46:37,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 343 events. 8/343 cut-off events. For 8/9 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 337 event pairs, 0 based on Foata normal form. 21/340 useless extension candidates. Maximal degree in co-relation 277. Up to 5 conditions per place. [2022-11-20 11:46:37,130 INFO L137 encePairwiseOnDemand]: 354/374 looper letters, 4 selfloop transitions, 0 changer transitions 12/343 dead transitions. [2022-11-20 11:46:37,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 343 transitions, 706 flow [2022-11-20 11:46:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:46:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:46:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 722 transitions. [2022-11-20 11:46:37,159 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9652406417112299 [2022-11-20 11:46:37,160 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 722 transitions. [2022-11-20 11:46:37,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 722 transitions. [2022-11-20 11:46:37,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:37,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 722 transitions. [2022-11-20 11:46:37,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 361.0) internal successors, (722), 2 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,192 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,195 INFO L175 Difference]: Start difference. First operand has 342 places, 363 transitions, 738 flow. Second operand 2 states and 722 transitions. [2022-11-20 11:46:37,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 343 transitions, 706 flow [2022-11-20 11:46:37,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 343 transitions, 698 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:46:37,214 INFO L231 Difference]: Finished difference. Result has 339 places, 331 transitions, 666 flow [2022-11-20 11:46:37,217 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=666, PETRI_PLACES=339, PETRI_TRANSITIONS=331} [2022-11-20 11:46:37,223 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, -3 predicate places. [2022-11-20 11:46:37,223 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 331 transitions, 666 flow [2022-11-20 11:46:37,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 353.0) internal successors, (706), 2 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,225 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:37,226 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:37,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:46:37,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:37,230 INFO L85 PathProgramCache]: Analyzing trace with hash -761859074, now seen corresponding path program 1 times [2022-11-20 11:46:37,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:37,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644719318] [2022-11-20 11:46:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:37,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:37,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:37,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644719318] [2022-11-20 11:46:37,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644719318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:37,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:37,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90621915] [2022-11-20 11:46:37,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:37,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:46:37,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:37,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:46:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:37,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 374 [2022-11-20 11:46:37,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 331 transitions, 666 flow. Second operand has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:37,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 374 [2022-11-20 11:46:37,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:37,734 INFO L130 PetriNetUnfolder]: 19/448 cut-off events. [2022-11-20 11:46:37,735 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:46:37,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 448 events. 19/448 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1039 event pairs, 5 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 486. Up to 22 conditions per place. [2022-11-20 11:46:37,739 INFO L137 encePairwiseOnDemand]: 370/374 looper letters, 11 selfloop transitions, 3 changer transitions 0/334 dead transitions. [2022-11-20 11:46:37,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 334 transitions, 701 flow [2022-11-20 11:46:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:46:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:46:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2022-11-20 11:46:37,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9278074866310161 [2022-11-20 11:46:37,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2022-11-20 11:46:37,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2022-11-20 11:46:37,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:37,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2022-11-20 11:46:37,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,752 INFO L175 Difference]: Start difference. First operand has 339 places, 331 transitions, 666 flow. Second operand 3 states and 1041 transitions. [2022-11-20 11:46:37,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 334 transitions, 701 flow [2022-11-20 11:46:37,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 334 transitions, 701 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:46:37,765 INFO L231 Difference]: Finished difference. Result has 331 places, 333 transitions, 688 flow [2022-11-20 11:46:37,765 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=688, PETRI_PLACES=331, PETRI_TRANSITIONS=333} [2022-11-20 11:46:37,766 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, -11 predicate places. [2022-11-20 11:46:37,767 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 333 transitions, 688 flow [2022-11-20 11:46:37,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:37,769 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:37,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:46:37,770 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1946151650, now seen corresponding path program 1 times [2022-11-20 11:46:37,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:37,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938971691] [2022-11-20 11:46:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:37,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:38,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:38,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938971691] [2022-11-20 11:46:38,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938971691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:38,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:38,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:38,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040795455] [2022-11-20 11:46:38,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:38,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:46:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:46:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:38,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 374 [2022-11-20 11:46:38,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 333 transitions, 688 flow. Second operand has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:38,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 374 [2022-11-20 11:46:38,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:38,283 INFO L130 PetriNetUnfolder]: 17/398 cut-off events. [2022-11-20 11:46:38,283 INFO L131 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-11-20 11:46:38,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 398 events. 17/398 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 651 event pairs, 5 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 438. Up to 22 conditions per place. [2022-11-20 11:46:38,287 INFO L137 encePairwiseOnDemand]: 370/374 looper letters, 11 selfloop transitions, 3 changer transitions 0/336 dead transitions. [2022-11-20 11:46:38,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 336 transitions, 723 flow [2022-11-20 11:46:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:46:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:46:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2022-11-20 11:46:38,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9278074866310161 [2022-11-20 11:46:38,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2022-11-20 11:46:38,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2022-11-20 11:46:38,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:38,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2022-11-20 11:46:38,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,304 INFO L175 Difference]: Start difference. First operand has 331 places, 333 transitions, 688 flow. Second operand 3 states and 1041 transitions. [2022-11-20 11:46:38,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 336 transitions, 723 flow [2022-11-20 11:46:38,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 336 transitions, 717 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:46:38,314 INFO L231 Difference]: Finished difference. Result has 333 places, 335 transitions, 704 flow [2022-11-20 11:46:38,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=704, PETRI_PLACES=333, PETRI_TRANSITIONS=335} [2022-11-20 11:46:38,318 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, -9 predicate places. [2022-11-20 11:46:38,318 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 335 transitions, 704 flow [2022-11-20 11:46:38,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:38,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:38,320 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:38,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:46:38,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:38,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:38,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1265240246, now seen corresponding path program 1 times [2022-11-20 11:46:38,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:38,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189972666] [2022-11-20 11:46:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:38,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:39,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:39,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189972666] [2022-11-20 11:46:39,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189972666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:39,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:39,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:46:39,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256291384] [2022-11-20 11:46:39,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:39,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:46:39,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:46:39,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:46:39,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 374 [2022-11-20 11:46:39,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 335 transitions, 704 flow. Second operand has 8 states, 8 states have (on average 268.875) internal successors, (2151), 8 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:39,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 374 [2022-11-20 11:46:39,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:39,601 INFO L130 PetriNetUnfolder]: 33/644 cut-off events. [2022-11-20 11:46:39,601 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-20 11:46:39,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 644 events. 33/644 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2174 event pairs, 15 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 821. Up to 77 conditions per place. [2022-11-20 11:46:39,609 INFO L137 encePairwiseOnDemand]: 364/374 looper letters, 76 selfloop transitions, 9 changer transitions 0/339 dead transitions. [2022-11-20 11:46:39,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 339 transitions, 882 flow [2022-11-20 11:46:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:46:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:46:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2166 transitions. [2022-11-20 11:46:39,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7239304812834224 [2022-11-20 11:46:39,616 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2166 transitions. [2022-11-20 11:46:39,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2166 transitions. [2022-11-20 11:46:39,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:39,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2166 transitions. [2022-11-20 11:46:39,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 270.75) internal successors, (2166), 8 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 374.0) internal successors, (3366), 9 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,641 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 374.0) internal successors, (3366), 9 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,641 INFO L175 Difference]: Start difference. First operand has 333 places, 335 transitions, 704 flow. Second operand 8 states and 2166 transitions. [2022-11-20 11:46:39,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 339 transitions, 882 flow [2022-11-20 11:46:39,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 339 transitions, 876 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:46:39,655 INFO L231 Difference]: Finished difference. Result has 339 places, 336 transitions, 724 flow [2022-11-20 11:46:39,656 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=724, PETRI_PLACES=339, PETRI_TRANSITIONS=336} [2022-11-20 11:46:39,658 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, -3 predicate places. [2022-11-20 11:46:39,658 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 336 transitions, 724 flow [2022-11-20 11:46:39,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 268.875) internal successors, (2151), 8 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:39,666 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:39,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:46:39,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:39,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:39,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1927680248, now seen corresponding path program 1 times [2022-11-20 11:46:39,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:39,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557680133] [2022-11-20 11:46:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:39,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:40,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:40,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557680133] [2022-11-20 11:46:40,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557680133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:40,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463215806] [2022-11-20 11:46:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:40,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:40,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:46:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:40,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:46:40,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:40,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:41,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463215806] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:41,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:46:41,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 16 [2022-11-20 11:46:41,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114666917] [2022-11-20 11:46:41,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:41,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:46:41,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:41,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:46:41,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:46:41,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 374 [2022-11-20 11:46:41,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 336 transitions, 724 flow. Second operand has 9 states, 9 states have (on average 298.1111111111111) internal successors, (2683), 9 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:41,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 374 [2022-11-20 11:46:41,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:41,770 INFO L130 PetriNetUnfolder]: 33/645 cut-off events. [2022-11-20 11:46:41,771 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-20 11:46:41,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 645 events. 33/645 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2175 event pairs, 15 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 799. Up to 45 conditions per place. [2022-11-20 11:46:41,776 INFO L137 encePairwiseOnDemand]: 358/374 looper letters, 48 selfloop transitions, 15 changer transitions 0/338 dead transitions. [2022-11-20 11:46:41,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 338 transitions, 854 flow [2022-11-20 11:46:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:46:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 11:46:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3579 transitions. [2022-11-20 11:46:41,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7974598930481284 [2022-11-20 11:46:41,786 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3579 transitions. [2022-11-20 11:46:41,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3579 transitions. [2022-11-20 11:46:41,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:41,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3579 transitions. [2022-11-20 11:46:41,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 298.25) internal successors, (3579), 12 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 374.0) internal successors, (4862), 13 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,812 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 374.0) internal successors, (4862), 13 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,812 INFO L175 Difference]: Start difference. First operand has 339 places, 336 transitions, 724 flow. Second operand 12 states and 3579 transitions. [2022-11-20 11:46:41,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 338 transitions, 854 flow [2022-11-20 11:46:41,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 338 transitions, 838 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 11:46:41,822 INFO L231 Difference]: Finished difference. Result has 347 places, 338 transitions, 757 flow [2022-11-20 11:46:41,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=757, PETRI_PLACES=347, PETRI_TRANSITIONS=338} [2022-11-20 11:46:41,824 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 5 predicate places. [2022-11-20 11:46:41,824 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 338 transitions, 757 flow [2022-11-20 11:46:41,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 298.1111111111111) internal successors, (2683), 9 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:41,826 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:41,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:42,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:42,042 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash -352128074, now seen corresponding path program 1 times [2022-11-20 11:46:42,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:42,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633327437] [2022-11-20 11:46:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:42,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:42,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:42,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633327437] [2022-11-20 11:46:42,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633327437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:42,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:42,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:46:42,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880843509] [2022-11-20 11:46:42,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:42,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:46:42,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:46:42,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:46:42,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 374 [2022-11-20 11:46:42,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 338 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 269.375) internal successors, (2155), 8 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:42,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:42,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 374 [2022-11-20 11:46:42,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:43,045 INFO L130 PetriNetUnfolder]: 31/606 cut-off events. [2022-11-20 11:46:43,046 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-20 11:46:43,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 606 events. 31/606 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1984 event pairs, 15 based on Foata normal form. 1/584 useless extension candidates. Maximal degree in co-relation 792. Up to 92 conditions per place. [2022-11-20 11:46:43,052 INFO L137 encePairwiseOnDemand]: 362/374 looper letters, 76 selfloop transitions, 11 changer transitions 0/342 dead transitions. [2022-11-20 11:46:43,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 342 transitions, 939 flow [2022-11-20 11:46:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:46:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:46:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2426 transitions. [2022-11-20 11:46:43,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.720736779560309 [2022-11-20 11:46:43,059 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2426 transitions. [2022-11-20 11:46:43,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2426 transitions. [2022-11-20 11:46:43,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:43,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2426 transitions. [2022-11-20 11:46:43,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 269.55555555555554) internal successors, (2426), 9 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:43,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:43,079 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:43,080 INFO L175 Difference]: Start difference. First operand has 347 places, 338 transitions, 757 flow. Second operand 9 states and 2426 transitions. [2022-11-20 11:46:43,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 342 transitions, 939 flow [2022-11-20 11:46:43,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 342 transitions, 915 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-20 11:46:43,092 INFO L231 Difference]: Finished difference. Result has 347 places, 339 transitions, 763 flow [2022-11-20 11:46:43,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=763, PETRI_PLACES=347, PETRI_TRANSITIONS=339} [2022-11-20 11:46:43,097 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 5 predicate places. [2022-11-20 11:46:43,098 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 339 transitions, 763 flow [2022-11-20 11:46:43,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 269.375) internal successors, (2155), 8 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:43,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:43,104 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:43,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:46:43,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash -836834027, now seen corresponding path program 1 times [2022-11-20 11:46:43,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:43,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219526654] [2022-11-20 11:46:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:43,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:43,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:43,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219526654] [2022-11-20 11:46:43,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219526654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:43,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401503121] [2022-11-20 11:46:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:43,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:43,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:43,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:43,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:46:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:43,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:46:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:44,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:44,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401503121] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:44,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:46:44,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 16 [2022-11-20 11:46:44,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834159583] [2022-11-20 11:46:44,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:44,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:46:44,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:46:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:46:44,487 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 374 [2022-11-20 11:46:44,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 339 transitions, 763 flow. Second operand has 9 states, 9 states have (on average 299.0) internal successors, (2691), 9 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:44,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 374 [2022-11-20 11:46:44,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:44,876 INFO L130 PetriNetUnfolder]: 31/607 cut-off events. [2022-11-20 11:46:44,876 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-20 11:46:44,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 607 events. 31/607 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1971 event pairs, 15 based on Foata normal form. 0/583 useless extension candidates. Maximal degree in co-relation 776. Up to 73 conditions per place. [2022-11-20 11:46:44,882 INFO L137 encePairwiseOnDemand]: 358/374 looper letters, 50 selfloop transitions, 16 changer transitions 0/341 dead transitions. [2022-11-20 11:46:44,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 341 transitions, 899 flow [2022-11-20 11:46:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:46:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-20 11:46:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3286 transitions. [2022-11-20 11:46:44,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7987360233349539 [2022-11-20 11:46:44,892 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3286 transitions. [2022-11-20 11:46:44,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3286 transitions. [2022-11-20 11:46:44,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:44,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3286 transitions. [2022-11-20 11:46:44,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 298.72727272727275) internal successors, (3286), 11 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 374.0) internal successors, (4488), 12 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,916 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 374.0) internal successors, (4488), 12 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,916 INFO L175 Difference]: Start difference. First operand has 347 places, 339 transitions, 763 flow. Second operand 11 states and 3286 transitions. [2022-11-20 11:46:44,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 341 transitions, 899 flow [2022-11-20 11:46:44,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 341 transitions, 879 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-20 11:46:44,926 INFO L231 Difference]: Finished difference. Result has 353 places, 341 transitions, 795 flow [2022-11-20 11:46:44,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=795, PETRI_PLACES=353, PETRI_TRANSITIONS=341} [2022-11-20 11:46:44,928 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 11 predicate places. [2022-11-20 11:46:44,928 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 341 transitions, 795 flow [2022-11-20 11:46:44,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 299.0) internal successors, (2691), 9 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:44,930 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:44,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:45,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9ac6-e3d4-4d99-888d-e8a33277453f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 11:46:45,139 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1997562046, now seen corresponding path program 1 times [2022-11-20 11:46:45,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:45,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494540871] [2022-11-20 11:46:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:45,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:46:48,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:48,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494540871] [2022-11-20 11:46:48,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494540871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:48,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:48,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:46:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458420937] [2022-11-20 11:46:48,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:48,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:46:48,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:46:48,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:46:48,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-20 11:46:48,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 341 transitions, 795 flow. Second operand has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:48,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-20 11:46:48,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:53,204 INFO L130 PetriNetUnfolder]: 1437/5597 cut-off events. [2022-11-20 11:46:53,205 INFO L131 PetriNetUnfolder]: For 61/67 co-relation queries the response was YES. [2022-11-20 11:46:53,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8481 conditions, 5597 events. 1437/5597 cut-off events. For 61/67 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 51086 event pairs, 45 based on Foata normal form. 5/5362 useless extension candidates. Maximal degree in co-relation 8467. Up to 805 conditions per place. [2022-11-20 11:46:53,260 INFO L137 encePairwiseOnDemand]: 353/374 looper letters, 328 selfloop transitions, 33 changer transitions 25/613 dead transitions. [2022-11-20 11:46:53,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 613 transitions, 2127 flow [2022-11-20 11:46:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:46:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-20 11:46:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8105 transitions. [2022-11-20 11:46:53,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6373859704309531 [2022-11-20 11:46:53,283 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8105 transitions. [2022-11-20 11:46:53,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8105 transitions. [2022-11-20 11:46:53,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:53,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8105 transitions. [2022-11-20 11:46:53,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 238.38235294117646) internal successors, (8105), 34 states have internal predecessors, (8105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:53,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 374.0) internal successors, (13090), 35 states have internal predecessors, (13090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:53,340 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 374.0) internal successors, (13090), 35 states have internal predecessors, (13090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:53,340 INFO L175 Difference]: Start difference. First operand has 353 places, 341 transitions, 795 flow. Second operand 34 states and 8105 transitions. [2022-11-20 11:46:53,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 613 transitions, 2127 flow [2022-11-20 11:46:53,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 613 transitions, 2102 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-20 11:46:53,364 INFO L231 Difference]: Finished difference. Result has 405 places, 368 transitions, 1005 flow [2022-11-20 11:46:53,365 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1005, PETRI_PLACES=405, PETRI_TRANSITIONS=368} [2022-11-20 11:46:53,369 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 63 predicate places. [2022-11-20 11:46:53,369 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 368 transitions, 1005 flow [2022-11-20 11:46:53,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:53,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:53,372 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:53,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:46:53,372 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:53,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:53,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1794910986, now seen corresponding path program 2 times [2022-11-20 11:46:53,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:53,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604447083] [2022-11-20 11:46:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:53,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:46:56,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:56,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604447083] [2022-11-20 11:46:56,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604447083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:56,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:56,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:46:56,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128885330] [2022-11-20 11:46:56,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:56,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:46:56,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:56,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:46:56,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:46:56,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-20 11:46:56,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 368 transitions, 1005 flow. Second operand has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:56,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:56,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-20 11:46:56,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:04,093 INFO L130 PetriNetUnfolder]: 2402/9121 cut-off events. [2022-11-20 11:47:04,094 INFO L131 PetriNetUnfolder]: For 5814/5822 co-relation queries the response was YES. [2022-11-20 11:47:04,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17818 conditions, 9121 events. 2402/9121 cut-off events. For 5814/5822 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 94361 event pairs, 419 based on Foata normal form. 1/8718 useless extension candidates. Maximal degree in co-relation 17777. Up to 1377 conditions per place. [2022-11-20 11:47:04,241 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 328 selfloop transitions, 54 changer transitions 25/634 dead transitions. [2022-11-20 11:47:04,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 634 transitions, 2848 flow [2022-11-20 11:47:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 11:47:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-20 11:47:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 7418 transitions. [2022-11-20 11:47:04,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6398136967396929 [2022-11-20 11:47:04,262 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 7418 transitions. [2022-11-20 11:47:04,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 7418 transitions. [2022-11-20 11:47:04,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:04,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 7418 transitions. [2022-11-20 11:47:04,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 239.29032258064515) internal successors, (7418), 31 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:04,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 374.0) internal successors, (11968), 32 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:04,314 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 374.0) internal successors, (11968), 32 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:04,314 INFO L175 Difference]: Start difference. First operand has 405 places, 368 transitions, 1005 flow. Second operand 31 states and 7418 transitions. [2022-11-20 11:47:04,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 634 transitions, 2848 flow [2022-11-20 11:47:04,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 634 transitions, 2603 flow, removed 54 selfloop flow, removed 12 redundant places. [2022-11-20 11:47:04,438 INFO L231 Difference]: Finished difference. Result has 443 places, 404 transitions, 1411 flow [2022-11-20 11:47:04,439 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1411, PETRI_PLACES=443, PETRI_TRANSITIONS=404} [2022-11-20 11:47:04,440 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 101 predicate places. [2022-11-20 11:47:04,440 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 404 transitions, 1411 flow [2022-11-20 11:47:04,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:04,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:04,443 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:04,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:47:04,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash 801899956, now seen corresponding path program 3 times [2022-11-20 11:47:04,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:04,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119017707] [2022-11-20 11:47:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:04,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:47:07,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:07,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119017707] [2022-11-20 11:47:07,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119017707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:47:07,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:47:07,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:47:07,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451702442] [2022-11-20 11:47:07,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:47:07,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:47:07,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:07,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:47:07,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:47:07,186 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-20 11:47:07,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 404 transitions, 1411 flow. Second operand has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:07,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:07,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-20 11:47:07,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:13,022 INFO L130 PetriNetUnfolder]: 2461/9945 cut-off events. [2022-11-20 11:47:13,023 INFO L131 PetriNetUnfolder]: For 12602/12637 co-relation queries the response was YES. [2022-11-20 11:47:13,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21529 conditions, 9945 events. 2461/9945 cut-off events. For 12602/12637 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 105921 event pairs, 356 based on Foata normal form. 16/9501 useless extension candidates. Maximal degree in co-relation 21466. Up to 2862 conditions per place. [2022-11-20 11:47:13,191 INFO L137 encePairwiseOnDemand]: 353/374 looper letters, 295 selfloop transitions, 46 changer transitions 15/583 dead transitions. [2022-11-20 11:47:13,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 583 transitions, 3319 flow [2022-11-20 11:47:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:47:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-20 11:47:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5480 transitions. [2022-11-20 11:47:13,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6370611485701 [2022-11-20 11:47:13,209 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5480 transitions. [2022-11-20 11:47:13,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5480 transitions. [2022-11-20 11:47:13,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:13,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5480 transitions. [2022-11-20 11:47:13,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 238.2608695652174) internal successors, (5480), 23 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:13,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 374.0) internal successors, (8976), 24 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:13,250 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 374.0) internal successors, (8976), 24 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:13,250 INFO L175 Difference]: Start difference. First operand has 443 places, 404 transitions, 1411 flow. Second operand 23 states and 5480 transitions. [2022-11-20 11:47:13,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 583 transitions, 3319 flow [2022-11-20 11:47:13,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 583 transitions, 3037 flow, removed 141 selfloop flow, removed 7 redundant places. [2022-11-20 11:47:13,372 INFO L231 Difference]: Finished difference. Result has 466 places, 428 transitions, 1723 flow [2022-11-20 11:47:13,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1723, PETRI_PLACES=466, PETRI_TRANSITIONS=428} [2022-11-20 11:47:13,373 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 124 predicate places. [2022-11-20 11:47:13,374 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 428 transitions, 1723 flow [2022-11-20 11:47:13,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:13,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:13,375 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:13,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:47:13,376 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1769371254, now seen corresponding path program 4 times [2022-11-20 11:47:13,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:13,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057540373] [2022-11-20 11:47:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:47:15,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:15,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057540373] [2022-11-20 11:47:15,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057540373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:47:15,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:47:15,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:47:15,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234637549] [2022-11-20 11:47:15,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:47:15,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:47:15,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:15,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:47:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:47:15,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-20 11:47:15,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 428 transitions, 1723 flow. Second operand has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:15,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:15,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-20 11:47:15,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:23,362 INFO L130 PetriNetUnfolder]: 2590/10030 cut-off events. [2022-11-20 11:47:23,362 INFO L131 PetriNetUnfolder]: For 14438/14478 co-relation queries the response was YES. [2022-11-20 11:47:23,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22531 conditions, 10030 events. 2590/10030 cut-off events. For 14438/14478 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 106804 event pairs, 456 based on Foata normal form. 25/9618 useless extension candidates. Maximal degree in co-relation 22458. Up to 1671 conditions per place. [2022-11-20 11:47:23,499 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 316 selfloop transitions, 80 changer transitions 25/648 dead transitions. [2022-11-20 11:47:23,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 648 transitions, 3811 flow [2022-11-20 11:47:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:47:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 11:47:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7157 transitions. [2022-11-20 11:47:23,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6378787878787879 [2022-11-20 11:47:23,513 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7157 transitions. [2022-11-20 11:47:23,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7157 transitions. [2022-11-20 11:47:23,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:23,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7157 transitions. [2022-11-20 11:47:23,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 238.56666666666666) internal successors, (7157), 30 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:23,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 374.0) internal successors, (11594), 31 states have internal predecessors, (11594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:23,559 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 374.0) internal successors, (11594), 31 states have internal predecessors, (11594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:23,560 INFO L175 Difference]: Start difference. First operand has 466 places, 428 transitions, 1723 flow. Second operand 30 states and 7157 transitions. [2022-11-20 11:47:23,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 648 transitions, 3811 flow [2022-11-20 11:47:23,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 648 transitions, 3602 flow, removed 79 selfloop flow, removed 7 redundant places. [2022-11-20 11:47:23,689 INFO L231 Difference]: Finished difference. Result has 504 places, 449 transitions, 2084 flow [2022-11-20 11:47:23,690 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2084, PETRI_PLACES=504, PETRI_TRANSITIONS=449} [2022-11-20 11:47:23,691 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 162 predicate places. [2022-11-20 11:47:23,691 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 449 transitions, 2084 flow [2022-11-20 11:47:23,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:23,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:23,693 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:23,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:47:23,693 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1628135536, now seen corresponding path program 5 times [2022-11-20 11:47:23,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:23,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179625653] [2022-11-20 11:47:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:47:26,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:26,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179625653] [2022-11-20 11:47:26,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179625653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:47:26,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:47:26,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:47:26,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731810994] [2022-11-20 11:47:26,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:47:26,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:47:26,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:47:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:47:26,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-20 11:47:26,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 449 transitions, 2084 flow. Second operand has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:26,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:26,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-20 11:47:26,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:34,832 INFO L130 PetriNetUnfolder]: 3342/12941 cut-off events. [2022-11-20 11:47:34,833 INFO L131 PetriNetUnfolder]: For 32714/32792 co-relation queries the response was YES. [2022-11-20 11:47:35,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32767 conditions, 12941 events. 3342/12941 cut-off events. For 32714/32792 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 144889 event pairs, 452 based on Foata normal form. 49/12431 useless extension candidates. Maximal degree in co-relation 32677. Up to 2223 conditions per place. [2022-11-20 11:47:35,101 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 433 selfloop transitions, 95 changer transitions 23/778 dead transitions. [2022-11-20 11:47:35,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 778 transitions, 5500 flow [2022-11-20 11:47:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 11:47:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-20 11:47:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 8828 transitions. [2022-11-20 11:47:35,122 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6379534614828732 [2022-11-20 11:47:35,122 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 8828 transitions. [2022-11-20 11:47:35,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 8828 transitions. [2022-11-20 11:47:35,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:35,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 8828 transitions. [2022-11-20 11:47:35,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 238.59459459459458) internal successors, (8828), 37 states have internal predecessors, (8828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:35,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 374.0) internal successors, (14212), 38 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:35,168 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 374.0) internal successors, (14212), 38 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:35,168 INFO L175 Difference]: Start difference. First operand has 504 places, 449 transitions, 2084 flow. Second operand 37 states and 8828 transitions. [2022-11-20 11:47:35,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 778 transitions, 5500 flow [2022-11-20 11:47:35,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 778 transitions, 5111 flow, removed 119 selfloop flow, removed 13 redundant places. [2022-11-20 11:47:35,447 INFO L231 Difference]: Finished difference. Result has 552 places, 485 transitions, 2713 flow [2022-11-20 11:47:35,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2713, PETRI_PLACES=552, PETRI_TRANSITIONS=485} [2022-11-20 11:47:35,449 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 210 predicate places. [2022-11-20 11:47:35,450 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 485 transitions, 2713 flow [2022-11-20 11:47:35,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:35,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:35,451 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:35,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:47:35,452 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:35,453 INFO L85 PathProgramCache]: Analyzing trace with hash -835821050, now seen corresponding path program 6 times [2022-11-20 11:47:35,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:35,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064080971] [2022-11-20 11:47:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:35,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:47:37,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:37,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064080971] [2022-11-20 11:47:37,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064080971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:47:37,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:47:37,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:47:37,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684297268] [2022-11-20 11:47:37,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:47:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:47:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:37,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:47:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:47:37,839 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-20 11:47:37,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 485 transitions, 2713 flow. Second operand has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:37,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:37,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-20 11:47:37,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:46,802 INFO L130 PetriNetUnfolder]: 3463/14105 cut-off events. [2022-11-20 11:47:46,803 INFO L131 PetriNetUnfolder]: For 61338/61468 co-relation queries the response was YES. [2022-11-20 11:47:47,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38700 conditions, 14105 events. 3463/14105 cut-off events. For 61338/61468 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 163241 event pairs, 766 based on Foata normal form. 55/13559 useless extension candidates. Maximal degree in co-relation 38584. Up to 3130 conditions per place. [2022-11-20 11:47:47,155 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 373 selfloop transitions, 89 changer transitions 19/708 dead transitions. [2022-11-20 11:47:47,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 708 transitions, 5866 flow [2022-11-20 11:47:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:47:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 11:47:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5772 transitions. [2022-11-20 11:47:47,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.643048128342246 [2022-11-20 11:47:47,171 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5772 transitions. [2022-11-20 11:47:47,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5772 transitions. [2022-11-20 11:47:47,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:47,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5772 transitions. [2022-11-20 11:47:47,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 240.5) internal successors, (5772), 24 states have internal predecessors, (5772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:47,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 374.0) internal successors, (9350), 25 states have internal predecessors, (9350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:47,205 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 374.0) internal successors, (9350), 25 states have internal predecessors, (9350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:47,205 INFO L175 Difference]: Start difference. First operand has 552 places, 485 transitions, 2713 flow. Second operand 24 states and 5772 transitions. [2022-11-20 11:47:47,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 708 transitions, 5866 flow [2022-11-20 11:47:47,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 708 transitions, 5461 flow, removed 176 selfloop flow, removed 10 redundant places. [2022-11-20 11:47:47,702 INFO L231 Difference]: Finished difference. Result has 573 places, 507 transitions, 3145 flow [2022-11-20 11:47:47,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3145, PETRI_PLACES=573, PETRI_TRANSITIONS=507} [2022-11-20 11:47:47,705 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 231 predicate places. [2022-11-20 11:47:47,706 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 507 transitions, 3145 flow [2022-11-20 11:47:47,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:47,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:47,707 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:47,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:47:47,708 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:47,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1192984804, now seen corresponding path program 7 times [2022-11-20 11:47:47,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:47,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453777085] [2022-11-20 11:47:47,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:47,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:47:49,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:49,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453777085] [2022-11-20 11:47:49,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453777085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:47:49,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:47:49,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:47:49,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175432942] [2022-11-20 11:47:49,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:47:49,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:47:49,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:49,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:47:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:47:49,926 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-20 11:47:49,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 507 transitions, 3145 flow. Second operand has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:49,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:49,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-20 11:47:49,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:59,609 INFO L130 PetriNetUnfolder]: 4056/16061 cut-off events. [2022-11-20 11:47:59,609 INFO L131 PetriNetUnfolder]: For 68590/68744 co-relation queries the response was YES. [2022-11-20 11:47:59,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44873 conditions, 16061 events. 4056/16061 cut-off events. For 68590/68744 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 189519 event pairs, 528 based on Foata normal form. 88/15469 useless extension candidates. Maximal degree in co-relation 44748. Up to 2223 conditions per place. [2022-11-20 11:48:00,000 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 474 selfloop transitions, 121 changer transitions 23/845 dead transitions. [2022-11-20 11:48:00,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 845 transitions, 7126 flow [2022-11-20 11:48:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 11:48:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-20 11:48:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 8843 transitions. [2022-11-20 11:48:00,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6390374331550802 [2022-11-20 11:48:00,032 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 8843 transitions. [2022-11-20 11:48:00,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 8843 transitions. [2022-11-20 11:48:00,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:48:00,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 8843 transitions. [2022-11-20 11:48:00,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 239.0) internal successors, (8843), 37 states have internal predecessors, (8843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:00,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 374.0) internal successors, (14212), 38 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:00,086 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 374.0) internal successors, (14212), 38 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:00,086 INFO L175 Difference]: Start difference. First operand has 573 places, 507 transitions, 3145 flow. Second operand 37 states and 8843 transitions. [2022-11-20 11:48:00,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 845 transitions, 7126 flow [2022-11-20 11:48:00,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 845 transitions, 6553 flow, removed 211 selfloop flow, removed 11 redundant places. [2022-11-20 11:48:00,727 INFO L231 Difference]: Finished difference. Result has 614 places, 525 transitions, 3493 flow [2022-11-20 11:48:00,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3493, PETRI_PLACES=614, PETRI_TRANSITIONS=525} [2022-11-20 11:48:00,729 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 272 predicate places. [2022-11-20 11:48:00,729 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 525 transitions, 3493 flow [2022-11-20 11:48:00,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:00,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:00,730 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:00,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:48:00,731 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:00,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1046098234, now seen corresponding path program 8 times [2022-11-20 11:48:00,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:00,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145662347] [2022-11-20 11:48:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:00,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:48:03,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145662347] [2022-11-20 11:48:03,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145662347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:03,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:03,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:48:03,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756615016] [2022-11-20 11:48:03,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:03,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:48:03,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:03,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:48:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:48:03,268 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-20 11:48:03,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 525 transitions, 3493 flow. Second operand has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:03,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:03,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-20 11:48:03,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:48:16,366 INFO L130 PetriNetUnfolder]: 4748/19962 cut-off events. [2022-11-20 11:48:16,366 INFO L131 PetriNetUnfolder]: For 99375/99575 co-relation queries the response was YES. [2022-11-20 11:48:16,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55537 conditions, 19962 events. 4748/19962 cut-off events. For 99375/99575 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 248869 event pairs, 860 based on Foata normal form. 95/19210 useless extension candidates. Maximal degree in co-relation 55396. Up to 3741 conditions per place. [2022-11-20 11:48:16,986 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 487 selfloop transitions, 117 changer transitions 25/856 dead transitions. [2022-11-20 11:48:16,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 856 transitions, 7704 flow [2022-11-20 11:48:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:48:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-20 11:48:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8143 transitions. [2022-11-20 11:48:17,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6403743315508021 [2022-11-20 11:48:17,005 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8143 transitions. [2022-11-20 11:48:17,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8143 transitions. [2022-11-20 11:48:17,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:48:17,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8143 transitions. [2022-11-20 11:48:17,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 239.5) internal successors, (8143), 34 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:17,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 374.0) internal successors, (13090), 35 states have internal predecessors, (13090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:17,057 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 374.0) internal successors, (13090), 35 states have internal predecessors, (13090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:17,057 INFO L175 Difference]: Start difference. First operand has 614 places, 525 transitions, 3493 flow. Second operand 34 states and 8143 transitions. [2022-11-20 11:48:17,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 856 transitions, 7704 flow [2022-11-20 11:48:18,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 856 transitions, 7175 flow, removed 139 selfloop flow, removed 22 redundant places. [2022-11-20 11:48:18,083 INFO L231 Difference]: Finished difference. Result has 639 places, 548 transitions, 3918 flow [2022-11-20 11:48:18,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=3132, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3918, PETRI_PLACES=639, PETRI_TRANSITIONS=548} [2022-11-20 11:48:18,085 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 297 predicate places. [2022-11-20 11:48:18,085 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 548 transitions, 3918 flow [2022-11-20 11:48:18,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:18,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:18,087 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:18,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:48:18,087 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1792765506, now seen corresponding path program 9 times [2022-11-20 11:48:18,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:18,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752706604] [2022-11-20 11:48:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:18,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:48:19,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:19,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752706604] [2022-11-20 11:48:19,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752706604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:19,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:19,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:48:19,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620631509] [2022-11-20 11:48:19,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:19,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:48:19,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:19,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:48:19,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:48:19,805 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-20 11:48:19,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 548 transitions, 3918 flow. Second operand has 16 states, 16 states have (on average 233.75) internal successors, (3740), 16 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:19,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:19,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-20 11:48:19,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand