./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 e04fb08f 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_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8 --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-e04fb08 [2022-11-16 12:41:47,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:41:47,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:41:47,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:41:47,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:41:47,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:41:47,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:41:47,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:41:47,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:41:47,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:41:47,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:41:47,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:41:47,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:41:47,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:41:47,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:41:47,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:41:47,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:41:47,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:41:47,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:41:47,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:41:47,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:41:47,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:41:47,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:41:47,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:41:47,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:41:47,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:41:47,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:41:47,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:41:47,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:41:47,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:41:47,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:41:47,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:41:47,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:41:47,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:41:47,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:41:47,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:41:47,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:41:47,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:41:47,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:41:47,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:41:47,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:41:47,345 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:41:47,384 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:41:47,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:41:47,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:41:47,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:41:47,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:41:47,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:41:47,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:41:47,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:41:47,393 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:41:47,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:41:47,395 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:41:47,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:41:47,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:41:47,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:41:47,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:41:47,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:41:47,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:41:47,397 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:41:47,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:41:47,397 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:41:47,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:41:47,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:41:47,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:41:47,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:41:47,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:41:47,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:41:47,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:41:47,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:41:47,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:41:47,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:41:47,408 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:41:47,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:41:47,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:41:47,409 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_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-11-16 12:41:47,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:41:47,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:41:47,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:41:47,744 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:41:47,745 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:41:47,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-16 12:41:47,823 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/data/7e778cd47/3fe34f9837634897baa58ad3e1c7dda1/FLAG9c6c44d82 [2022-11-16 12:41:48,409 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:41:48,410 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-16 12:41:48,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/data/7e778cd47/3fe34f9837634897baa58ad3e1c7dda1/FLAG9c6c44d82 [2022-11-16 12:41:48,762 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/data/7e778cd47/3fe34f9837634897baa58ad3e1c7dda1 [2022-11-16 12:41:48,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:41:48,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:41:48,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:41:48,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:41:48,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:41:48,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:41:48" (1/1) ... [2022-11-16 12:41:48,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a13d275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:48, skipping insertion in model container [2022-11-16 12:41:48,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:41:48" (1/1) ... [2022-11-16 12:41:48,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:41:48,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:41:49,176 WARN L229 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_53ca089e-b236-4d62-b11f-b11a51520059/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-16 12:41:49,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:41:49,211 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:41:49,261 WARN L229 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_53ca089e-b236-4d62-b11f-b11a51520059/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-16 12:41:49,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:41:49,295 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:41:49,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49 WrapperNode [2022-11-16 12:41:49,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:41:49,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:41:49,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:41:49,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:41:49,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,392 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 282 [2022-11-16 12:41:49,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:41:49,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:41:49,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:41:49,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:41:49,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,456 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:41:49,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:41:49,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:41:49,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:41:49,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (1/1) ... [2022-11-16 12:41:49,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:41:49,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:49,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:41:49,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:41:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:41:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:41:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:41:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:41:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:41:49,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:41:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:41:49,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:41:49,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:41:49,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:41:49,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:41:49,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:41:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:41:49,569 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:41:49,776 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:41:49,784 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:41:50,297 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:41:50,311 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:41:50,311 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 12:41:50,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:41:50 BoogieIcfgContainer [2022-11-16 12:41:50,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:41:50,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:41:50,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:41:50,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:41:50,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:41:48" (1/3) ... [2022-11-16 12:41:50,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cf262f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:41:50, skipping insertion in model container [2022-11-16 12:41:50,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:49" (2/3) ... [2022-11-16 12:41:50,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cf262f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:41:50, skipping insertion in model container [2022-11-16 12:41:50,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:41:50" (3/3) ... [2022-11-16 12:41:50,324 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2022-11-16 12:41:50,340 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:41:50,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:41:50,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:41:50,352 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:41:50,548 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:41:50,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 353 places, 374 transitions, 764 flow [2022-11-16 12:41:50,765 INFO L130 PetriNetUnfolder]: 28/372 cut-off events. [2022-11-16 12:41:50,765 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:41:50,773 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. [2022-11-16 12:41:50,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 353 places, 374 transitions, 764 flow [2022-11-16 12:41:50,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 342 places, 363 transitions, 738 flow [2022-11-16 12:41:50,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:41:50,801 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;@1851d5bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:41:50,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 12:41:50,908 INFO L130 PetriNetUnfolder]: 28/362 cut-off events. [2022-11-16 12:41:50,909 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:41:50,909 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:50,910 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] [2022-11-16 12:41:50,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:41:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:50,917 INFO L85 PathProgramCache]: Analyzing trace with hash -446630756, now seen corresponding path program 1 times [2022-11-16 12:41:50,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:50,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508533823] [2022-11-16 12:41:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:50,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:51,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:51,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508533823] [2022-11-16 12:41:51,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508533823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:51,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:41:51,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:41:51,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177523407] [2022-11-16 12:41:51,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:41:51,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:51,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:41:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:41:51,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 374 [2022-11-16 12:41:51,624 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) [2022-11-16 12:41:51,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:51,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 374 [2022-11-16 12:41:51,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:51,741 INFO L130 PetriNetUnfolder]: 8/343 cut-off events. [2022-11-16 12:41:51,741 INFO L131 PetriNetUnfolder]: For 8/9 co-relation queries the response was YES. [2022-11-16 12:41:51,747 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. [2022-11-16 12:41:51,749 INFO L137 encePairwiseOnDemand]: 354/374 looper letters, 4 selfloop transitions, 0 changer transitions 12/343 dead transitions. [2022-11-16 12:41:51,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 343 transitions, 706 flow [2022-11-16 12:41:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:41:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:41:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 722 transitions. [2022-11-16 12:41:51,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9652406417112299 [2022-11-16 12:41:51,776 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 722 transitions. [2022-11-16 12:41:51,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 722 transitions. [2022-11-16 12:41:51,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:51,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 722 transitions. [2022-11-16 12:41:51,790 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) [2022-11-16 12:41:51,803 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) [2022-11-16 12:41:51,804 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) [2022-11-16 12:41:51,806 INFO L175 Difference]: Start difference. First operand has 342 places, 363 transitions, 738 flow. Second operand 2 states and 722 transitions. [2022-11-16 12:41:51,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 343 transitions, 706 flow [2022-11-16 12:41:51,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 343 transitions, 698 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:41:51,823 INFO L231 Difference]: Finished difference. Result has 339 places, 331 transitions, 666 flow [2022-11-16 12:41:51,826 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} [2022-11-16 12:41:51,830 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, -3 predicate places. [2022-11-16 12:41:51,830 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 331 transitions, 666 flow [2022-11-16 12:41:51,831 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) [2022-11-16 12:41:51,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:51,832 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] [2022-11-16 12:41:51,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:41:51,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:41:51,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:51,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1585078534, now seen corresponding path program 1 times [2022-11-16 12:41:51,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:51,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517987860] [2022-11-16 12:41:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:51,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:52,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:52,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517987860] [2022-11-16 12:41:52,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517987860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:52,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:41:52,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:41:52,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247182511] [2022-11-16 12:41:52,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:52,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:41:52,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:41:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:41:52,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 374 [2022-11-16 12:41:52,094 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) [2022-11-16 12:41:52,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:52,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 374 [2022-11-16 12:41:52,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:52,251 INFO L130 PetriNetUnfolder]: 19/448 cut-off events. [2022-11-16 12:41:52,251 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:41:52,253 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. [2022-11-16 12:41:52,255 INFO L137 encePairwiseOnDemand]: 370/374 looper letters, 11 selfloop transitions, 3 changer transitions 0/334 dead transitions. [2022-11-16 12:41:52,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 334 transitions, 701 flow [2022-11-16 12:41:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:41:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:41:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2022-11-16 12:41:52,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9278074866310161 [2022-11-16 12:41:52,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2022-11-16 12:41:52,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2022-11-16 12:41:52,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:52,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2022-11-16 12:41:52,264 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) [2022-11-16 12:41:52,268 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) [2022-11-16 12:41:52,269 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) [2022-11-16 12:41:52,269 INFO L175 Difference]: Start difference. First operand has 339 places, 331 transitions, 666 flow. Second operand 3 states and 1041 transitions. [2022-11-16 12:41:52,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 334 transitions, 701 flow [2022-11-16 12:41:52,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 334 transitions, 701 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:41:52,280 INFO L231 Difference]: Finished difference. Result has 331 places, 333 transitions, 688 flow [2022-11-16 12:41:52,281 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} [2022-11-16 12:41:52,282 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, -11 predicate places. [2022-11-16 12:41:52,283 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 333 transitions, 688 flow [2022-11-16 12:41:52,284 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) [2022-11-16 12:41:52,284 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:52,285 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] [2022-11-16 12:41:52,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:41:52,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:41:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:52,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1106233054, now seen corresponding path program 1 times [2022-11-16 12:41:52,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:52,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23879000] [2022-11-16 12:41:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:52,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:52,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23879000] [2022-11-16 12:41:52,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23879000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:52,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:41:52,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:41:52,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951612906] [2022-11-16 12:41:52,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:52,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:41:52,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:52,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:41:52,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:41:52,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 374 [2022-11-16 12:41:52,478 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) [2022-11-16 12:41:52,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:52,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 374 [2022-11-16 12:41:52,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:52,604 INFO L130 PetriNetUnfolder]: 17/398 cut-off events. [2022-11-16 12:41:52,604 INFO L131 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-11-16 12:41:52,606 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. [2022-11-16 12:41:52,607 INFO L137 encePairwiseOnDemand]: 370/374 looper letters, 11 selfloop transitions, 3 changer transitions 0/336 dead transitions. [2022-11-16 12:41:52,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 336 transitions, 723 flow [2022-11-16 12:41:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:41:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:41:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2022-11-16 12:41:52,612 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9278074866310161 [2022-11-16 12:41:52,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2022-11-16 12:41:52,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2022-11-16 12:41:52,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:52,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2022-11-16 12:41:52,618 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) [2022-11-16 12:41:52,621 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) [2022-11-16 12:41:52,622 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) [2022-11-16 12:41:52,623 INFO L175 Difference]: Start difference. First operand has 331 places, 333 transitions, 688 flow. Second operand 3 states and 1041 transitions. [2022-11-16 12:41:52,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 336 transitions, 723 flow [2022-11-16 12:41:52,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 336 transitions, 717 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:41:52,631 INFO L231 Difference]: Finished difference. Result has 333 places, 335 transitions, 704 flow [2022-11-16 12:41:52,632 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} [2022-11-16 12:41:52,635 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, -9 predicate places. [2022-11-16 12:41:52,635 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 335 transitions, 704 flow [2022-11-16 12:41:52,636 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) [2022-11-16 12:41:52,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:52,637 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] [2022-11-16 12:41:52,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:41:52,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:41:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:52,639 INFO L85 PathProgramCache]: Analyzing trace with hash -973159354, now seen corresponding path program 1 times [2022-11-16 12:41:52,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:52,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754049128] [2022-11-16 12:41:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:52,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:53,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754049128] [2022-11-16 12:41:53,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754049128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:53,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:41:53,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:41:53,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480253748] [2022-11-16 12:41:53,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:53,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:41:53,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:41:53,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:41:53,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 374 [2022-11-16 12:41:53,492 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) [2022-11-16 12:41:53,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:53,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 374 [2022-11-16 12:41:53,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:53,881 INFO L130 PetriNetUnfolder]: 33/644 cut-off events. [2022-11-16 12:41:53,882 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-16 12:41:53,884 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. [2022-11-16 12:41:53,889 INFO L137 encePairwiseOnDemand]: 364/374 looper letters, 76 selfloop transitions, 9 changer transitions 0/339 dead transitions. [2022-11-16 12:41:53,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 339 transitions, 882 flow [2022-11-16 12:41:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:41:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:41:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2166 transitions. [2022-11-16 12:41:53,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7239304812834224 [2022-11-16 12:41:53,895 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2166 transitions. [2022-11-16 12:41:53,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2166 transitions. [2022-11-16 12:41:53,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:53,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2166 transitions. [2022-11-16 12:41:53,903 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) [2022-11-16 12:41:53,911 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) [2022-11-16 12:41:53,916 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) [2022-11-16 12:41:53,917 INFO L175 Difference]: Start difference. First operand has 333 places, 335 transitions, 704 flow. Second operand 8 states and 2166 transitions. [2022-11-16 12:41:53,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 339 transitions, 882 flow [2022-11-16 12:41:53,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 339 transitions, 876 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:41:53,930 INFO L231 Difference]: Finished difference. Result has 339 places, 336 transitions, 724 flow [2022-11-16 12:41:53,931 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} [2022-11-16 12:41:53,934 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, -3 predicate places. [2022-11-16 12:41:53,934 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 336 transitions, 724 flow [2022-11-16 12:41:53,936 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) [2022-11-16 12:41:53,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:53,942 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] [2022-11-16 12:41:53,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:41:53,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:41:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1209781900, now seen corresponding path program 1 times [2022-11-16 12:41:53,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:53,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256924096] [2022-11-16 12:41:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:53,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:54,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:54,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256924096] [2022-11-16 12:41:54,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256924096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:54,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457297981] [2022-11-16 12:41:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:54,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:54,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:54,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:54,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:41:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:41:54,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:55,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:55,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457297981] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:55,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:41:55,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 16 [2022-11-16 12:41:55,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012577241] [2022-11-16 12:41:55,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:55,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:41:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:55,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:41:55,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:41:55,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 374 [2022-11-16 12:41:55,347 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) [2022-11-16 12:41:55,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:55,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 374 [2022-11-16 12:41:55,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:55,776 INFO L130 PetriNetUnfolder]: 33/645 cut-off events. [2022-11-16 12:41:55,777 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-16 12:41:55,780 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. [2022-11-16 12:41:55,782 INFO L137 encePairwiseOnDemand]: 358/374 looper letters, 48 selfloop transitions, 15 changer transitions 0/338 dead transitions. [2022-11-16 12:41:55,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 338 transitions, 854 flow [2022-11-16 12:41:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:41:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 12:41:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3579 transitions. [2022-11-16 12:41:55,791 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7974598930481284 [2022-11-16 12:41:55,791 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3579 transitions. [2022-11-16 12:41:55,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3579 transitions. [2022-11-16 12:41:55,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:55,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3579 transitions. [2022-11-16 12:41:55,808 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) [2022-11-16 12:41:55,816 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) [2022-11-16 12:41:55,819 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) [2022-11-16 12:41:55,819 INFO L175 Difference]: Start difference. First operand has 339 places, 336 transitions, 724 flow. Second operand 12 states and 3579 transitions. [2022-11-16 12:41:55,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 338 transitions, 854 flow [2022-11-16 12:41:55,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 338 transitions, 838 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 12:41:55,828 INFO L231 Difference]: Finished difference. Result has 347 places, 338 transitions, 757 flow [2022-11-16 12:41:55,829 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} [2022-11-16 12:41:55,830 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 5 predicate places. [2022-11-16 12:41:55,830 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 338 transitions, 757 flow [2022-11-16 12:41:55,832 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) [2022-11-16 12:41:55,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:55,832 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] [2022-11-16 12:41:55,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:56,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:56,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:41:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:56,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1972903994, now seen corresponding path program 1 times [2022-11-16 12:41:56,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:56,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108328737] [2022-11-16 12:41:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:56,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:41:56,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:56,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108328737] [2022-11-16 12:41:56,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108328737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:56,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:41:56,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:41:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618823870] [2022-11-16 12:41:56,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:56,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:41:56,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:41:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:41:56,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 374 [2022-11-16 12:41:56,657 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) [2022-11-16 12:41:56,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:56,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 374 [2022-11-16 12:41:56,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:56,949 INFO L130 PetriNetUnfolder]: 31/606 cut-off events. [2022-11-16 12:41:56,950 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-16 12:41:56,952 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. [2022-11-16 12:41:56,954 INFO L137 encePairwiseOnDemand]: 362/374 looper letters, 76 selfloop transitions, 11 changer transitions 0/342 dead transitions. [2022-11-16 12:41:56,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 342 transitions, 939 flow [2022-11-16 12:41:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:41:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:41:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2426 transitions. [2022-11-16 12:41:56,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.720736779560309 [2022-11-16 12:41:56,960 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2426 transitions. [2022-11-16 12:41:56,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2426 transitions. [2022-11-16 12:41:56,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:56,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2426 transitions. [2022-11-16 12:41:56,967 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) [2022-11-16 12:41:56,973 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) [2022-11-16 12:41:56,975 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) [2022-11-16 12:41:56,975 INFO L175 Difference]: Start difference. First operand has 347 places, 338 transitions, 757 flow. Second operand 9 states and 2426 transitions. [2022-11-16 12:41:56,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 342 transitions, 939 flow [2022-11-16 12:41:56,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 342 transitions, 915 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-16 12:41:56,985 INFO L231 Difference]: Finished difference. Result has 347 places, 339 transitions, 763 flow [2022-11-16 12:41:56,986 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} [2022-11-16 12:41:56,988 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 5 predicate places. [2022-11-16 12:41:56,989 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 339 transitions, 763 flow [2022-11-16 12:41:56,991 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) [2022-11-16 12:41:56,993 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:56,993 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] [2022-11-16 12:41:56,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:41:56,994 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:41:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1706779665, now seen corresponding path program 1 times [2022-11-16 12:41:56,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:56,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093748422] [2022-11-16 12:41:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:57,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:41:57,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:57,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093748422] [2022-11-16 12:41:57,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093748422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:57,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767131290] [2022-11-16 12:41:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:57,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:57,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:57,423 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:57,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:41:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:57,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:41:57,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:41:57,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:41:58,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767131290] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:58,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:41:58,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 16 [2022-11-16 12:41:58,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72499861] [2022-11-16 12:41:58,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:58,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:41:58,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:58,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:41:58,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:41:58,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 374 [2022-11-16 12:41:58,194 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) [2022-11-16 12:41:58,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:58,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 374 [2022-11-16 12:41:58,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:58,567 INFO L130 PetriNetUnfolder]: 31/607 cut-off events. [2022-11-16 12:41:58,567 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-16 12:41:58,570 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. [2022-11-16 12:41:58,572 INFO L137 encePairwiseOnDemand]: 358/374 looper letters, 50 selfloop transitions, 16 changer transitions 0/341 dead transitions. [2022-11-16 12:41:58,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 341 transitions, 899 flow [2022-11-16 12:41:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:41:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 12:41:58,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3286 transitions. [2022-11-16 12:41:58,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7987360233349539 [2022-11-16 12:41:58,583 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3286 transitions. [2022-11-16 12:41:58,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3286 transitions. [2022-11-16 12:41:58,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:58,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3286 transitions. [2022-11-16 12:41:58,601 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) [2022-11-16 12:41:58,617 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) [2022-11-16 12:41:58,620 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) [2022-11-16 12:41:58,620 INFO L175 Difference]: Start difference. First operand has 347 places, 339 transitions, 763 flow. Second operand 11 states and 3286 transitions. [2022-11-16 12:41:58,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 341 transitions, 899 flow [2022-11-16 12:41:58,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 341 transitions, 879 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-16 12:41:58,630 INFO L231 Difference]: Finished difference. Result has 353 places, 341 transitions, 795 flow [2022-11-16 12:41:58,630 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} [2022-11-16 12:41:58,631 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 11 predicate places. [2022-11-16 12:41:58,631 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 341 transitions, 795 flow [2022-11-16 12:41:58,632 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) [2022-11-16 12:41:58,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:58,633 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] [2022-11-16 12:41:58,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:58,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53ca089e-b236-4d62-b11f-b11a51520059/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:58,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:41:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash 463383226, now seen corresponding path program 1 times [2022-11-16 12:41:58,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:58,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443366943] [2022-11-16 12:41:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:58,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:42:01,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:01,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443366943] [2022-11-16 12:42:01,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443366943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:01,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:01,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:42:01,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923865032] [2022-11-16 12:42:01,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:01,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:42:01,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:01,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:42:01,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:42:01,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-16 12:42:01,358 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) [2022-11-16 12:42:01,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:01,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-16 12:42:01,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:05,424 INFO L130 PetriNetUnfolder]: 1437/5597 cut-off events. [2022-11-16 12:42:05,425 INFO L131 PetriNetUnfolder]: For 60/66 co-relation queries the response was YES. [2022-11-16 12:42:05,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8481 conditions, 5597 events. 1437/5597 cut-off events. For 60/66 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. [2022-11-16 12:42:05,467 INFO L137 encePairwiseOnDemand]: 353/374 looper letters, 328 selfloop transitions, 33 changer transitions 25/613 dead transitions. [2022-11-16 12:42:05,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 613 transitions, 2127 flow [2022-11-16 12:42:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:42:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-16 12:42:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8105 transitions. [2022-11-16 12:42:05,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6373859704309531 [2022-11-16 12:42:05,486 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8105 transitions. [2022-11-16 12:42:05,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8105 transitions. [2022-11-16 12:42:05,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:05,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8105 transitions. [2022-11-16 12:42:05,508 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) [2022-11-16 12:42:05,529 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) [2022-11-16 12:42:05,534 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) [2022-11-16 12:42:05,534 INFO L175 Difference]: Start difference. First operand has 353 places, 341 transitions, 795 flow. Second operand 34 states and 8105 transitions. [2022-11-16 12:42:05,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 613 transitions, 2127 flow [2022-11-16 12:42:05,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 613 transitions, 2102 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-16 12:42:05,549 INFO L231 Difference]: Finished difference. Result has 405 places, 368 transitions, 1005 flow [2022-11-16 12:42:05,550 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} [2022-11-16 12:42:05,551 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 63 predicate places. [2022-11-16 12:42:05,551 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 368 transitions, 1005 flow [2022-11-16 12:42:05,552 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) [2022-11-16 12:42:05,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:05,553 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] [2022-11-16 12:42:05,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:42:05,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:42:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash 260732166, now seen corresponding path program 2 times [2022-11-16 12:42:05,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:05,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731503206] [2022-11-16 12:42:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:05,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:42:07,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:07,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731503206] [2022-11-16 12:42:07,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731503206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:07,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:07,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:42:07,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327669878] [2022-11-16 12:42:07,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:07,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:42:07,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:42:07,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:42:07,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-16 12:42:07,929 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) [2022-11-16 12:42:07,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:07,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-16 12:42:07,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:14,929 INFO L130 PetriNetUnfolder]: 2402/9121 cut-off events. [2022-11-16 12:42:14,929 INFO L131 PetriNetUnfolder]: For 5814/5822 co-relation queries the response was YES. [2022-11-16 12:42:15,148 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. [2022-11-16 12:42:15,193 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 328 selfloop transitions, 54 changer transitions 25/634 dead transitions. [2022-11-16 12:42:15,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 634 transitions, 2848 flow [2022-11-16 12:42:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 12:42:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-16 12:42:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 7418 transitions. [2022-11-16 12:42:15,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6398136967396929 [2022-11-16 12:42:15,211 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 7418 transitions. [2022-11-16 12:42:15,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 7418 transitions. [2022-11-16 12:42:15,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:15,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 7418 transitions. [2022-11-16 12:42:15,233 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) [2022-11-16 12:42:15,260 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) [2022-11-16 12:42:15,266 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) [2022-11-16 12:42:15,266 INFO L175 Difference]: Start difference. First operand has 405 places, 368 transitions, 1005 flow. Second operand 31 states and 7418 transitions. [2022-11-16 12:42:15,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 634 transitions, 2848 flow [2022-11-16 12:42:15,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 634 transitions, 2603 flow, removed 54 selfloop flow, removed 12 redundant places. [2022-11-16 12:42:15,368 INFO L231 Difference]: Finished difference. Result has 443 places, 404 transitions, 1411 flow [2022-11-16 12:42:15,369 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} [2022-11-16 12:42:15,370 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 101 predicate places. [2022-11-16 12:42:15,371 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 404 transitions, 1411 flow [2022-11-16 12:42:15,372 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) [2022-11-16 12:42:15,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:15,373 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] [2022-11-16 12:42:15,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:42:15,373 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:42:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:15,374 INFO L85 PathProgramCache]: Analyzing trace with hash -732278864, now seen corresponding path program 3 times [2022-11-16 12:42:15,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:15,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520142569] [2022-11-16 12:42:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:15,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:42:17,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:17,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520142569] [2022-11-16 12:42:17,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520142569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:17,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:17,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:42:17,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874695181] [2022-11-16 12:42:17,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:17,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:42:17,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:17,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:42:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:42:17,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-16 12:42:17,424 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) [2022-11-16 12:42:17,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:17,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-16 12:42:17,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:22,136 INFO L130 PetriNetUnfolder]: 2461/9945 cut-off events. [2022-11-16 12:42:22,137 INFO L131 PetriNetUnfolder]: For 12602/12637 co-relation queries the response was YES. [2022-11-16 12:42:22,235 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. [2022-11-16 12:42:22,281 INFO L137 encePairwiseOnDemand]: 353/374 looper letters, 295 selfloop transitions, 46 changer transitions 15/583 dead transitions. [2022-11-16 12:42:22,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 583 transitions, 3319 flow [2022-11-16 12:42:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:42:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-16 12:42:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5480 transitions. [2022-11-16 12:42:22,294 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6370611485701 [2022-11-16 12:42:22,295 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5480 transitions. [2022-11-16 12:42:22,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5480 transitions. [2022-11-16 12:42:22,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:22,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5480 transitions. [2022-11-16 12:42:22,315 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) [2022-11-16 12:42:22,331 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) [2022-11-16 12:42:22,335 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) [2022-11-16 12:42:22,335 INFO L175 Difference]: Start difference. First operand has 443 places, 404 transitions, 1411 flow. Second operand 23 states and 5480 transitions. [2022-11-16 12:42:22,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 583 transitions, 3319 flow [2022-11-16 12:42:22,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 583 transitions, 3037 flow, removed 141 selfloop flow, removed 7 redundant places. [2022-11-16 12:42:22,477 INFO L231 Difference]: Finished difference. Result has 466 places, 428 transitions, 1723 flow [2022-11-16 12:42:22,479 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} [2022-11-16 12:42:22,480 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 124 predicate places. [2022-11-16 12:42:22,480 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 428 transitions, 1723 flow [2022-11-16 12:42:22,481 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) [2022-11-16 12:42:22,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:22,482 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] [2022-11-16 12:42:22,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:42:22,483 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:42:22,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash 991417222, now seen corresponding path program 4 times [2022-11-16 12:42:22,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:22,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585825659] [2022-11-16 12:42:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:22,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:42:24,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:24,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585825659] [2022-11-16 12:42:24,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585825659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:24,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:24,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:42:24,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490645531] [2022-11-16 12:42:24,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:24,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:42:24,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:24,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:42:24,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:42:24,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-16 12:42:24,557 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) [2022-11-16 12:42:24,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:24,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-16 12:42:24,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:30,405 INFO L130 PetriNetUnfolder]: 2590/10030 cut-off events. [2022-11-16 12:42:30,406 INFO L131 PetriNetUnfolder]: For 14438/14478 co-relation queries the response was YES. [2022-11-16 12:42:30,509 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. [2022-11-16 12:42:30,547 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 316 selfloop transitions, 80 changer transitions 25/648 dead transitions. [2022-11-16 12:42:30,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 648 transitions, 3811 flow [2022-11-16 12:42:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:42:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-16 12:42:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7157 transitions. [2022-11-16 12:42:30,559 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6378787878787879 [2022-11-16 12:42:30,559 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7157 transitions. [2022-11-16 12:42:30,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7157 transitions. [2022-11-16 12:42:30,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:30,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7157 transitions. [2022-11-16 12:42:30,575 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) [2022-11-16 12:42:30,591 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) [2022-11-16 12:42:30,596 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) [2022-11-16 12:42:30,596 INFO L175 Difference]: Start difference. First operand has 466 places, 428 transitions, 1723 flow. Second operand 30 states and 7157 transitions. [2022-11-16 12:42:30,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 648 transitions, 3811 flow [2022-11-16 12:42:30,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 648 transitions, 3602 flow, removed 79 selfloop flow, removed 7 redundant places. [2022-11-16 12:42:30,746 INFO L231 Difference]: Finished difference. Result has 504 places, 449 transitions, 2084 flow [2022-11-16 12:42:30,748 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} [2022-11-16 12:42:30,749 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 162 predicate places. [2022-11-16 12:42:30,749 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 449 transitions, 2084 flow [2022-11-16 12:42:30,750 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) [2022-11-16 12:42:30,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:30,751 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] [2022-11-16 12:42:30,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:42:30,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:42:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 93956716, now seen corresponding path program 5 times [2022-11-16 12:42:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:30,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040807293] [2022-11-16 12:42:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:30,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:42:32,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:32,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040807293] [2022-11-16 12:42:32,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040807293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:32,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:32,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:42:32,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261937523] [2022-11-16 12:42:32,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:32,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:42:32,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:32,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:42:32,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:42:32,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-16 12:42:32,984 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) [2022-11-16 12:42:32,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:32,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-16 12:42:32,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:40,271 INFO L130 PetriNetUnfolder]: 3342/12941 cut-off events. [2022-11-16 12:42:40,271 INFO L131 PetriNetUnfolder]: For 32714/32792 co-relation queries the response was YES. [2022-11-16 12:42:40,427 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. [2022-11-16 12:42:40,478 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 433 selfloop transitions, 95 changer transitions 23/778 dead transitions. [2022-11-16 12:42:40,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 778 transitions, 5500 flow [2022-11-16 12:42:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:42:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-16 12:42:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 8828 transitions. [2022-11-16 12:42:40,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6379534614828732 [2022-11-16 12:42:40,491 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 8828 transitions. [2022-11-16 12:42:40,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 8828 transitions. [2022-11-16 12:42:40,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:40,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 8828 transitions. [2022-11-16 12:42:40,509 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) [2022-11-16 12:42:40,521 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) [2022-11-16 12:42:40,525 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) [2022-11-16 12:42:40,525 INFO L175 Difference]: Start difference. First operand has 504 places, 449 transitions, 2084 flow. Second operand 37 states and 8828 transitions. [2022-11-16 12:42:40,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 778 transitions, 5500 flow [2022-11-16 12:42:40,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 778 transitions, 5111 flow, removed 119 selfloop flow, removed 13 redundant places. [2022-11-16 12:42:40,921 INFO L231 Difference]: Finished difference. Result has 552 places, 485 transitions, 2713 flow [2022-11-16 12:42:40,922 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} [2022-11-16 12:42:40,923 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 210 predicate places. [2022-11-16 12:42:40,923 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 485 transitions, 2713 flow [2022-11-16 12:42:40,924 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) [2022-11-16 12:42:40,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:40,925 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] [2022-11-16 12:42:40,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:42:40,925 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:42:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1924967426, now seen corresponding path program 6 times [2022-11-16 12:42:40,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:40,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515028596] [2022-11-16 12:42:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:40,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:42:43,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:43,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515028596] [2022-11-16 12:42:43,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515028596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:43,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:43,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:42:43,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561219748] [2022-11-16 12:42:43,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:43,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:42:43,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:42:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:42:43,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-16 12:42:43,057 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) [2022-11-16 12:42:43,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:43,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-16 12:42:43,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:50,256 INFO L130 PetriNetUnfolder]: 3463/14105 cut-off events. [2022-11-16 12:42:50,256 INFO L131 PetriNetUnfolder]: For 61338/61468 co-relation queries the response was YES. [2022-11-16 12:42:50,474 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. [2022-11-16 12:42:50,544 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 373 selfloop transitions, 89 changer transitions 19/708 dead transitions. [2022-11-16 12:42:50,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 708 transitions, 5866 flow [2022-11-16 12:42:50,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:42:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 12:42:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5772 transitions. [2022-11-16 12:42:50,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.643048128342246 [2022-11-16 12:42:50,563 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5772 transitions. [2022-11-16 12:42:50,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5772 transitions. [2022-11-16 12:42:50,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:50,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5772 transitions. [2022-11-16 12:42:50,579 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) [2022-11-16 12:42:50,589 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) [2022-11-16 12:42:50,591 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) [2022-11-16 12:42:50,591 INFO L175 Difference]: Start difference. First operand has 552 places, 485 transitions, 2713 flow. Second operand 24 states and 5772 transitions. [2022-11-16 12:42:50,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 708 transitions, 5866 flow [2022-11-16 12:42:51,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 708 transitions, 5461 flow, removed 176 selfloop flow, removed 10 redundant places. [2022-11-16 12:42:51,068 INFO L231 Difference]: Finished difference. Result has 573 places, 507 transitions, 3145 flow [2022-11-16 12:42:51,069 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} [2022-11-16 12:42:51,070 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 231 predicate places. [2022-11-16 12:42:51,070 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 507 transitions, 3145 flow [2022-11-16 12:42:51,071 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) [2022-11-16 12:42:51,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:51,072 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] [2022-11-16 12:42:51,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:42:51,072 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:42:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1567803672, now seen corresponding path program 7 times [2022-11-16 12:42:51,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:51,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319624940] [2022-11-16 12:42:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:51,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:42:52,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:52,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319624940] [2022-11-16 12:42:52,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319624940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:52,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:52,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:42:52,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39635125] [2022-11-16 12:42:52,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:52,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:42:52,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:52,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:42:52,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:42:52,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-16 12:42:52,896 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) [2022-11-16 12:42:52,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:52,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-16 12:42:52,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:43:00,862 INFO L130 PetriNetUnfolder]: 4056/16061 cut-off events. [2022-11-16 12:43:00,862 INFO L131 PetriNetUnfolder]: For 68590/68744 co-relation queries the response was YES. [2022-11-16 12:43:01,108 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. [2022-11-16 12:43:01,339 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 474 selfloop transitions, 121 changer transitions 23/845 dead transitions. [2022-11-16 12:43:01,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 845 transitions, 7126 flow [2022-11-16 12:43:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:43:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-16 12:43:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 8843 transitions. [2022-11-16 12:43:01,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6390374331550802 [2022-11-16 12:43:01,365 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 8843 transitions. [2022-11-16 12:43:01,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 8843 transitions. [2022-11-16 12:43:01,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:43:01,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 8843 transitions. [2022-11-16 12:43:01,395 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) [2022-11-16 12:43:01,409 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) [2022-11-16 12:43:01,412 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) [2022-11-16 12:43:01,412 INFO L175 Difference]: Start difference. First operand has 573 places, 507 transitions, 3145 flow. Second operand 37 states and 8843 transitions. [2022-11-16 12:43:01,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 845 transitions, 7126 flow [2022-11-16 12:43:01,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 845 transitions, 6553 flow, removed 211 selfloop flow, removed 11 redundant places. [2022-11-16 12:43:01,878 INFO L231 Difference]: Finished difference. Result has 614 places, 525 transitions, 3493 flow [2022-11-16 12:43:01,878 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} [2022-11-16 12:43:01,879 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 272 predicate places. [2022-11-16 12:43:01,879 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 525 transitions, 3493 flow [2022-11-16 12:43:01,880 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) [2022-11-16 12:43:01,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:43:01,880 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] [2022-11-16 12:43:01,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:43:01,880 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:43:01,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:01,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1714690242, now seen corresponding path program 8 times [2022-11-16 12:43:01,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:01,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246996651] [2022-11-16 12:43:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:01,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:43:04,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:04,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246996651] [2022-11-16 12:43:04,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246996651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:04,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:43:04,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:43:04,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851846432] [2022-11-16 12:43:04,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:04,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:43:04,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:43:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:43:04,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-16 12:43:04,086 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) [2022-11-16 12:43:04,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:43:04,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-16 12:43:04,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:43:14,000 INFO L130 PetriNetUnfolder]: 4748/19962 cut-off events. [2022-11-16 12:43:14,001 INFO L131 PetriNetUnfolder]: For 99375/99575 co-relation queries the response was YES. [2022-11-16 12:43:14,553 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. [2022-11-16 12:43:14,649 INFO L137 encePairwiseOnDemand]: 352/374 looper letters, 487 selfloop transitions, 117 changer transitions 25/856 dead transitions. [2022-11-16 12:43:14,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 856 transitions, 7704 flow [2022-11-16 12:43:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:43:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-16 12:43:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8143 transitions. [2022-11-16 12:43:14,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6403743315508021 [2022-11-16 12:43:14,665 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8143 transitions. [2022-11-16 12:43:14,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8143 transitions. [2022-11-16 12:43:14,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:43:14,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8143 transitions. [2022-11-16 12:43:14,686 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) [2022-11-16 12:43:14,701 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) [2022-11-16 12:43:14,704 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) [2022-11-16 12:43:14,704 INFO L175 Difference]: Start difference. First operand has 614 places, 525 transitions, 3493 flow. Second operand 34 states and 8143 transitions. [2022-11-16 12:43:14,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 856 transitions, 7704 flow [2022-11-16 12:43:15,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 856 transitions, 7175 flow, removed 139 selfloop flow, removed 22 redundant places. [2022-11-16 12:43:15,477 INFO L231 Difference]: Finished difference. Result has 639 places, 548 transitions, 3918 flow [2022-11-16 12:43:15,479 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} [2022-11-16 12:43:15,479 INFO L288 CegarLoopForPetriNet]: 342 programPoint places, 297 predicate places. [2022-11-16 12:43:15,480 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 548 transitions, 3918 flow [2022-11-16 12:43:15,481 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) [2022-11-16 12:43:15,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:43:15,481 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] [2022-11-16 12:43:15,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:43:15,482 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:43:15,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:15,483 INFO L85 PathProgramCache]: Analyzing trace with hash 968022970, now seen corresponding path program 9 times [2022-11-16 12:43:15,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:15,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637368425] [2022-11-16 12:43:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:15,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:43:17,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:17,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637368425] [2022-11-16 12:43:17,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637368425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:17,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:43:17,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:43:17,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643339277] [2022-11-16 12:43:17,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:17,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:43:17,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:17,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:43:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:43:17,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 374 [2022-11-16 12:43:17,167 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) [2022-11-16 12:43:17,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:43:17,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 374 [2022-11-16 12:43:17,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand