./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-01-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-01-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3 --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 2ea18b6ba0d977117db11fbdff34c486def646c3 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:22:49,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:22:49,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:22:49,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:22:49,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:22:49,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:22:49,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:22:49,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:22:49,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:22:49,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:22:49,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:22:49,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:22:49,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:22:49,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:22:49,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:22:49,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:22:49,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:22:49,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:22:49,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:22:49,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:22:49,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:22:49,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:22:49,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:22:49,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:22:49,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:22:49,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:22:49,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:22:49,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:22:49,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:22:49,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:22:49,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:22:49,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:22:49,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:22:49,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:22:49,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:22:49,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:22:49,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:22:49,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:22:49,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:22:49,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:22:49,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:22:49,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:22:49,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:22:49,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:22:49,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:22:49,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:22:49,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:22:49,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:22:49,505 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:22:49,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:22:49,506 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:22:49,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:22:49,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:22:49,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:22:49,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:22:49,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:22:49,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:22:49,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:22:49,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:22:49,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:22:49,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:22:49,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:22:49,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:22:49,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:22:49,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:22:49,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:22:49,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:22:49,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:22:49,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:22:49,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:22:49,510 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:22:49,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:22:49,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:22:49,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:22:49,511 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ea18b6ba0d977117db11fbdff34c486def646c3 [2021-10-15 19:22:49,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:22:49,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:22:49,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:22:49,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:22:49,775 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:22:49,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/forester-heap/sll-01-2.i [2021-10-15 19:22:49,868 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/data/e5655eb6c/83baffab67cf4d1b98cc4dccadfb85b3/FLAG76f111f07 [2021-10-15 19:22:50,408 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:22:50,415 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i [2021-10-15 19:22:50,436 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/data/e5655eb6c/83baffab67cf4d1b98cc4dccadfb85b3/FLAG76f111f07 [2021-10-15 19:22:50,686 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/data/e5655eb6c/83baffab67cf4d1b98cc4dccadfb85b3 [2021-10-15 19:22:50,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:22:50,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:22:50,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:22:50,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:22:50,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:22:50,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:22:50" (1/1) ... [2021-10-15 19:22:50,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2d1c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:50, skipping insertion in model container [2021-10-15 19:22:50,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:22:50" (1/1) ... [2021-10-15 19:22:50,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:22:50,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:22:51,104 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22034,22047] [2021-10-15 19:22:51,123 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22307,22320] [2021-10-15 19:22:51,127 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22516,22529] [2021-10-15 19:22:51,129 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22586,22599] [2021-10-15 19:22:51,133 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22853,22866] [2021-10-15 19:22:51,135 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22961,22974] [2021-10-15 19:22:51,140 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23192,23205] [2021-10-15 19:22:51,143 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23272,23285] [2021-10-15 19:22:51,145 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23351,23364] [2021-10-15 19:22:51,147 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23484,23497] [2021-10-15 19:22:51,150 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23662,23675] [2021-10-15 19:22:51,153 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23740,23753] [2021-10-15 19:22:51,154 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23817,23830] [2021-10-15 19:22:51,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:22:51,176 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:22:51,233 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22034,22047] [2021-10-15 19:22:51,235 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22307,22320] [2021-10-15 19:22:51,237 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22516,22529] [2021-10-15 19:22:51,238 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22586,22599] [2021-10-15 19:22:51,241 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22853,22866] [2021-10-15 19:22:51,242 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[22961,22974] [2021-10-15 19:22:51,244 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23192,23205] [2021-10-15 19:22:51,245 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23272,23285] [2021-10-15 19:22:51,246 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23351,23364] [2021-10-15 19:22:51,247 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23484,23497] [2021-10-15 19:22:51,249 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23662,23675] [2021-10-15 19:22:51,250 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23740,23753] [2021-10-15 19:22:51,251 WARN L228 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_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/sv-benchmarks/c/forester-heap/sll-01-2.i[23817,23830] [2021-10-15 19:22:51,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:22:51,283 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:22:51,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51 WrapperNode [2021-10-15 19:22:51,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:22:51,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:22:51,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:22:51,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:22:51,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (1/1) ... [2021-10-15 19:22:51,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (1/1) ... [2021-10-15 19:22:51,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:22:51,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:22:51,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:22:51,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:22:51,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (1/1) ... [2021-10-15 19:22:51,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (1/1) ... [2021-10-15 19:22:51,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (1/1) ... [2021-10-15 19:22:51,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (1/1) ... [2021-10-15 19:22:51,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (1/1) ... [2021-10-15 19:22:51,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (1/1) ... [2021-10-15 19:22:51,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (1/1) ... [2021-10-15 19:22:51,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:22:51,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:22:51,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:22:51,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:22:51,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (1/1) ... [2021-10-15 19:22:51,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:22:51,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:22:51,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:22:51,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:22:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:22:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:22:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:22:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:22:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:22:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:22:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:22:51,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:22:52,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:22:52,039 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-10-15 19:22:52,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:22:52 BoogieIcfgContainer [2021-10-15 19:22:52,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:22:52,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:22:52,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:22:52,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:22:52,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:22:50" (1/3) ... [2021-10-15 19:22:52,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4632bb3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:22:52, skipping insertion in model container [2021-10-15 19:22:52,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:51" (2/3) ... [2021-10-15 19:22:52,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4632bb3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:22:52, skipping insertion in model container [2021-10-15 19:22:52,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:22:52" (3/3) ... [2021-10-15 19:22:52,064 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2021-10-15 19:22:52,075 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:22:52,076 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-10-15 19:22:52,137 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:22:52,143 INFO L339 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, mConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:22:52,143 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-10-15 19:22:52,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 84 places, 137 transitions, 274 flow [2021-10-15 19:22:52,192 INFO L129 PetriNetUnfolder]: 54/137 cut-off events. [2021-10-15 19:22:52,192 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:22:52,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 137 events. 54/137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 407 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:22:52,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 137 transitions, 274 flow [2021-10-15 19:22:52,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 132 transitions, 264 flow [2021-10-15 19:22:52,203 INFO L129 PetriNetUnfolder]: 4/10 cut-off events. [2021-10-15 19:22:52,203 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:22:52,203 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:52,204 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-10-15 19:22:52,204 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash 925700, now seen corresponding path program 1 times [2021-10-15 19:22:52,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:52,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578812741] [2021-10-15 19:22:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:52,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:52,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:52,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578812741] [2021-10-15 19:22:52,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578812741] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:52,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:52,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:22:52,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138530388] [2021-10-15 19:22:52,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:52,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:52,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:52,425 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 137 [2021-10-15 19:22:52,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 132 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:52,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:52,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 137 [2021-10-15 19:22:52,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:52,476 INFO L129 PetriNetUnfolder]: 12/107 cut-off events. [2021-10-15 19:22:52,477 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:22:52,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 107 events. 12/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 304 event pairs, 0 based on Foata normal form. 48/130 useless extension candidates. Maximal degree in co-relation 32. Up to 9 conditions per place. [2021-10-15 19:22:52,480 INFO L132 encePairwiseOnDemand]: 93/137 looper letters, 10 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2021-10-15 19:22:52,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 90 transitions, 204 flow [2021-10-15 19:22:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2021-10-15 19:22:52,495 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7518248175182481 [2021-10-15 19:22:52,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2021-10-15 19:22:52,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2021-10-15 19:22:52,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:52,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2021-10-15 19:22:52,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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) [2021-10-15 19:22:52,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:52,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:52,512 INFO L186 Difference]: Start difference. First operand has 80 places, 132 transitions, 264 flow. Second operand 3 states and 309 transitions. [2021-10-15 19:22:52,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 90 transitions, 204 flow [2021-10-15 19:22:52,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 90 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:22:52,521 INFO L242 Difference]: Finished difference. Result has 81 places, 89 transitions, 186 flow [2021-10-15 19:22:52,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2021-10-15 19:22:52,524 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 1 predicate places. [2021-10-15 19:22:52,524 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 186 flow [2021-10-15 19:22:52,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:52,525 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:52,525 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:52,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:22:52,526 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:52,527 INFO L82 PathProgramCache]: Analyzing trace with hash 261454926, now seen corresponding path program 1 times [2021-10-15 19:22:52,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:52,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322584567] [2021-10-15 19:22:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:52,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:52,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:52,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322584567] [2021-10-15 19:22:52,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322584567] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:52,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:52,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:22:52,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135701651] [2021-10-15 19:22:52,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:52,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:52,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:52,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:52,580 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 137 [2021-10-15 19:22:52,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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) [2021-10-15 19:22:52,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:52,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 137 [2021-10-15 19:22:52,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:52,603 INFO L129 PetriNetUnfolder]: 12/108 cut-off events. [2021-10-15 19:22:52,603 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:22:52,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 108 events. 12/108 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 308 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 97. Up to 7 conditions per place. [2021-10-15 19:22:52,605 INFO L132 encePairwiseOnDemand]: 134/137 looper letters, 5 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2021-10-15 19:22:52,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 202 flow [2021-10-15 19:22:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2021-10-15 19:22:52,608 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6618004866180048 [2021-10-15 19:22:52,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2021-10-15 19:22:52,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2021-10-15 19:22:52,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:52,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2021-10-15 19:22:52,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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) [2021-10-15 19:22:52,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:52,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:52,613 INFO L186 Difference]: Start difference. First operand has 81 places, 89 transitions, 186 flow. Second operand 3 states and 272 transitions. [2021-10-15 19:22:52,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 202 flow [2021-10-15 19:22:52,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:22:52,618 INFO L242 Difference]: Finished difference. Result has 83 places, 90 transitions, 196 flow [2021-10-15 19:22:52,619 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2021-10-15 19:22:52,619 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 3 predicate places. [2021-10-15 19:22:52,619 INFO L470 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 196 flow [2021-10-15 19:22:52,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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) [2021-10-15 19:22:52,622 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:52,622 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:52,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:22:52,623 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:52,623 INFO L82 PathProgramCache]: Analyzing trace with hash 261456848, now seen corresponding path program 1 times [2021-10-15 19:22:52,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:52,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380498694] [2021-10-15 19:22:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:52,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:52,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:52,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380498694] [2021-10-15 19:22:52,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380498694] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:52,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:52,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:22:52,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662592565] [2021-10-15 19:22:52,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:22:52,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:52,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:22:52,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:22:52,773 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 137 [2021-10-15 19:22:52,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 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) [2021-10-15 19:22:52,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:52,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 137 [2021-10-15 19:22:52,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:52,898 INFO L129 PetriNetUnfolder]: 12/107 cut-off events. [2021-10-15 19:22:52,899 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 19:22:52,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 107 events. 12/107 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 313 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 117. Up to 27 conditions per place. [2021-10-15 19:22:52,902 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 22 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2021-10-15 19:22:52,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 248 flow [2021-10-15 19:22:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:22:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:22:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2021-10-15 19:22:52,907 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.531021897810219 [2021-10-15 19:22:52,909 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2021-10-15 19:22:52,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2021-10-15 19:22:52,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:52,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2021-10-15 19:22:52,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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) [2021-10-15 19:22:52,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2021-10-15 19:22:52,916 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2021-10-15 19:22:52,916 INFO L186 Difference]: Start difference. First operand has 83 places, 90 transitions, 196 flow. Second operand 4 states and 291 transitions. [2021-10-15 19:22:52,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 248 flow [2021-10-15 19:22:52,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 89 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:22:52,925 INFO L242 Difference]: Finished difference. Result has 84 places, 89 transitions, 208 flow [2021-10-15 19:22:52,925 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=84, PETRI_TRANSITIONS=89} [2021-10-15 19:22:52,926 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 4 predicate places. [2021-10-15 19:22:52,926 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 89 transitions, 208 flow [2021-10-15 19:22:52,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 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) [2021-10-15 19:22:52,927 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:52,927 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:52,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:22:52,928 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1712619113, now seen corresponding path program 1 times [2021-10-15 19:22:52,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:52,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126142937] [2021-10-15 19:22:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:52,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:53,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:53,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126142937] [2021-10-15 19:22:53,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126142937] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:53,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:53,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:22:53,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697558040] [2021-10-15 19:22:53,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:53,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:53,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:53,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:53,028 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 137 [2021-10-15 19:22:53,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 89 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2021-10-15 19:22:53,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:53,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 137 [2021-10-15 19:22:53,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:53,098 INFO L129 PetriNetUnfolder]: 13/107 cut-off events. [2021-10-15 19:22:53,098 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:22:53,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 107 events. 13/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 310 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 130. Up to 28 conditions per place. [2021-10-15 19:22:53,101 INFO L132 encePairwiseOnDemand]: 133/137 looper letters, 25 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2021-10-15 19:22:53,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 258 flow [2021-10-15 19:22:53,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2021-10-15 19:22:53,110 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644768856447688 [2021-10-15 19:22:53,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2021-10-15 19:22:53,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2021-10-15 19:22:53,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:53,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2021-10-15 19:22:53,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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) [2021-10-15 19:22:53,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:53,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:53,118 INFO L186 Difference]: Start difference. First operand has 84 places, 89 transitions, 208 flow. Second operand 3 states and 232 transitions. [2021-10-15 19:22:53,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 258 flow [2021-10-15 19:22:53,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:53,128 INFO L242 Difference]: Finished difference. Result has 82 places, 87 transitions, 208 flow [2021-10-15 19:22:53,129 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2021-10-15 19:22:53,130 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 2 predicate places. [2021-10-15 19:22:53,130 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 208 flow [2021-10-15 19:22:53,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2021-10-15 19:22:53,131 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:53,131 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:53,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:22:53,131 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:53,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1551589151, now seen corresponding path program 1 times [2021-10-15 19:22:53,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:53,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805385095] [2021-10-15 19:22:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:53,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:53,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:53,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805385095] [2021-10-15 19:22:53,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805385095] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:53,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:53,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:22:53,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115557205] [2021-10-15 19:22:53,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:22:53,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:22:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:22:53,223 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 137 [2021-10-15 19:22:53,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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) [2021-10-15 19:22:53,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:53,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 137 [2021-10-15 19:22:53,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:53,354 INFO L129 PetriNetUnfolder]: 19/166 cut-off events. [2021-10-15 19:22:53,355 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-10-15 19:22:53,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 166 events. 19/166 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 683 event pairs, 0 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 203. Up to 34 conditions per place. [2021-10-15 19:22:53,358 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 40 selfloop transitions, 5 changer transitions 0/102 dead transitions. [2021-10-15 19:22:53,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 102 transitions, 340 flow [2021-10-15 19:22:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:22:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:22:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 306 transitions. [2021-10-15 19:22:53,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5583941605839416 [2021-10-15 19:22:53,360 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 306 transitions. [2021-10-15 19:22:53,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 306 transitions. [2021-10-15 19:22:53,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:53,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 306 transitions. [2021-10-15 19:22:53,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 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) [2021-10-15 19:22:53,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2021-10-15 19:22:53,365 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2021-10-15 19:22:53,365 INFO L186 Difference]: Start difference. First operand has 82 places, 87 transitions, 208 flow. Second operand 4 states and 306 transitions. [2021-10-15 19:22:53,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 102 transitions, 340 flow [2021-10-15 19:22:53,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 102 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:53,372 INFO L242 Difference]: Finished difference. Result has 85 places, 90 transitions, 239 flow [2021-10-15 19:22:53,373 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2021-10-15 19:22:53,373 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 5 predicate places. [2021-10-15 19:22:53,373 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 239 flow [2021-10-15 19:22:53,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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) [2021-10-15 19:22:53,374 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:53,374 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:53,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:22:53,374 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2063319775, now seen corresponding path program 1 times [2021-10-15 19:22:53,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:53,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021769188] [2021-10-15 19:22:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:53,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:53,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:53,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021769188] [2021-10-15 19:22:53,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021769188] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:53,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:53,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:22:53,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93296315] [2021-10-15 19:22:53,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:22:53,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:22:53,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:22:53,439 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 137 [2021-10-15 19:22:53,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 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) [2021-10-15 19:22:53,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:53,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 137 [2021-10-15 19:22:53,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:53,532 INFO L129 PetriNetUnfolder]: 25/216 cut-off events. [2021-10-15 19:22:53,532 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-10-15 19:22:53,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 216 events. 25/216 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 948 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 268. Up to 32 conditions per place. [2021-10-15 19:22:53,534 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 40 selfloop transitions, 5 changer transitions 0/98 dead transitions. [2021-10-15 19:22:53,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 98 transitions, 345 flow [2021-10-15 19:22:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:22:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:22:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 285 transitions. [2021-10-15 19:22:53,536 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5200729927007299 [2021-10-15 19:22:53,537 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 285 transitions. [2021-10-15 19:22:53,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 285 transitions. [2021-10-15 19:22:53,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:53,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 285 transitions. [2021-10-15 19:22:53,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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) [2021-10-15 19:22:53,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2021-10-15 19:22:53,541 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2021-10-15 19:22:53,541 INFO L186 Difference]: Start difference. First operand has 85 places, 90 transitions, 239 flow. Second operand 4 states and 285 transitions. [2021-10-15 19:22:53,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 98 transitions, 345 flow [2021-10-15 19:22:53,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 98 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:22:53,547 INFO L242 Difference]: Finished difference. Result has 86 places, 89 transitions, 250 flow [2021-10-15 19:22:53,547 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2021-10-15 19:22:53,547 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 6 predicate places. [2021-10-15 19:22:53,548 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 250 flow [2021-10-15 19:22:53,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 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) [2021-10-15 19:22:53,548 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:53,548 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:53,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:22:53,549 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:53,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:53,549 INFO L82 PathProgramCache]: Analyzing trace with hash -940628020, now seen corresponding path program 1 times [2021-10-15 19:22:53,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:53,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386930264] [2021-10-15 19:22:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:53,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:53,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:53,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386930264] [2021-10-15 19:22:53,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386930264] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:53,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:53,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:22:53,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477304398] [2021-10-15 19:22:53,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:53,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:53,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:53,614 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 137 [2021-10-15 19:22:53,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-10-15 19:22:53,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:53,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 137 [2021-10-15 19:22:53,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:53,660 INFO L129 PetriNetUnfolder]: 34/301 cut-off events. [2021-10-15 19:22:53,660 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-10-15 19:22:53,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 301 events. 34/301 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1314 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 338. Up to 30 conditions per place. [2021-10-15 19:22:53,662 INFO L132 encePairwiseOnDemand]: 133/137 looper letters, 9 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2021-10-15 19:22:53,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 92 transitions, 278 flow [2021-10-15 19:22:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:53,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2021-10-15 19:22:53,664 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6593673965936739 [2021-10-15 19:22:53,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2021-10-15 19:22:53,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2021-10-15 19:22:53,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:53,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2021-10-15 19:22:53,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 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) [2021-10-15 19:22:53,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:53,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:53,668 INFO L186 Difference]: Start difference. First operand has 86 places, 89 transitions, 250 flow. Second operand 3 states and 271 transitions. [2021-10-15 19:22:53,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 92 transitions, 278 flow [2021-10-15 19:22:53,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:53,682 INFO L242 Difference]: Finished difference. Result has 88 places, 91 transitions, 264 flow [2021-10-15 19:22:53,682 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2021-10-15 19:22:53,682 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 8 predicate places. [2021-10-15 19:22:53,683 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 264 flow [2021-10-15 19:22:53,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-10-15 19:22:53,683 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:53,683 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:53,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:22:53,683 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:53,684 INFO L82 PathProgramCache]: Analyzing trace with hash 895340894, now seen corresponding path program 1 times [2021-10-15 19:22:53,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:53,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997037017] [2021-10-15 19:22:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:53,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:53,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:53,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997037017] [2021-10-15 19:22:53,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997037017] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:53,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:53,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:22:53,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386107539] [2021-10-15 19:22:53,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:53,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:53,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:53,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:53,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 137 [2021-10-15 19:22:53,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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) [2021-10-15 19:22:53,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:53,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 137 [2021-10-15 19:22:53,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:53,775 INFO L129 PetriNetUnfolder]: 34/293 cut-off events. [2021-10-15 19:22:53,775 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2021-10-15 19:22:53,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 293 events. 34/293 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1253 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 226. Up to 24 conditions per place. [2021-10-15 19:22:53,777 INFO L132 encePairwiseOnDemand]: 134/137 looper letters, 8 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2021-10-15 19:22:53,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 280 flow [2021-10-15 19:22:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2021-10-15 19:22:53,780 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6374695863746959 [2021-10-15 19:22:53,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2021-10-15 19:22:53,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2021-10-15 19:22:53,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:53,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2021-10-15 19:22:53,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2021-10-15 19:22:53,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:53,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:53,784 INFO L186 Difference]: Start difference. First operand has 88 places, 91 transitions, 264 flow. Second operand 3 states and 262 transitions. [2021-10-15 19:22:53,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 280 flow [2021-10-15 19:22:53,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 89 transitions, 276 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:53,788 INFO L242 Difference]: Finished difference. Result has 86 places, 89 transitions, 260 flow [2021-10-15 19:22:53,788 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2021-10-15 19:22:53,789 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 6 predicate places. [2021-10-15 19:22:53,789 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 260 flow [2021-10-15 19:22:53,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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) [2021-10-15 19:22:53,790 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:53,790 INFO L254 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] [2021-10-15 19:22:53,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:22:53,790 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:53,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:53,791 INFO L82 PathProgramCache]: Analyzing trace with hash -84578375, now seen corresponding path program 1 times [2021-10-15 19:22:53,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:53,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560121615] [2021-10-15 19:22:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:53,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:53,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:53,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560121615] [2021-10-15 19:22:53,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560121615] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:53,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:53,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:22:53,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761723618] [2021-10-15 19:22:53,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:22:53,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:22:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:22:53,851 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 137 [2021-10-15 19:22:53,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 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) [2021-10-15 19:22:53,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:53,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 137 [2021-10-15 19:22:53,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:53,939 INFO L129 PetriNetUnfolder]: 34/292 cut-off events. [2021-10-15 19:22:53,939 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2021-10-15 19:22:53,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 292 events. 34/292 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1240 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 274. Up to 110 conditions per place. [2021-10-15 19:22:53,942 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 38 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2021-10-15 19:22:53,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 344 flow [2021-10-15 19:22:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:22:53,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:22:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 263 transitions. [2021-10-15 19:22:53,944 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47992700729927007 [2021-10-15 19:22:53,945 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 263 transitions. [2021-10-15 19:22:53,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 263 transitions. [2021-10-15 19:22:53,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:53,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 263 transitions. [2021-10-15 19:22:53,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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) [2021-10-15 19:22:53,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2021-10-15 19:22:53,948 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2021-10-15 19:22:53,948 INFO L186 Difference]: Start difference. First operand has 86 places, 89 transitions, 260 flow. Second operand 4 states and 263 transitions. [2021-10-15 19:22:53,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 344 flow [2021-10-15 19:22:53,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 88 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:53,952 INFO L242 Difference]: Finished difference. Result has 86 places, 88 transitions, 269 flow [2021-10-15 19:22:53,953 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2021-10-15 19:22:53,953 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 6 predicate places. [2021-10-15 19:22:53,953 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 269 flow [2021-10-15 19:22:53,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 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) [2021-10-15 19:22:53,954 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:53,954 INFO L254 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] [2021-10-15 19:22:53,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:22:53,955 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1357759361, now seen corresponding path program 1 times [2021-10-15 19:22:53,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:53,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246790765] [2021-10-15 19:22:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:53,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:54,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:54,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246790765] [2021-10-15 19:22:54,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246790765] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:54,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:54,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:22:54,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015229122] [2021-10-15 19:22:54,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:22:54,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:54,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:22:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:22:54,128 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 137 [2021-10-15 19:22:54,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 51.857142857142854) internal successors, (363), 7 states have internal predecessors, (363), 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) [2021-10-15 19:22:54,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:54,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 137 [2021-10-15 19:22:54,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:54,606 INFO L129 PetriNetUnfolder]: 49/455 cut-off events. [2021-10-15 19:22:54,606 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2021-10-15 19:22:54,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 455 events. 49/455 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2388 event pairs, 0 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 592. Up to 110 conditions per place. [2021-10-15 19:22:54,613 INFO L132 encePairwiseOnDemand]: 125/137 looper letters, 104 selfloop transitions, 20 changer transitions 0/164 dead transitions. [2021-10-15 19:22:54,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 164 transitions, 720 flow [2021-10-15 19:22:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:22:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:22:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 666 transitions. [2021-10-15 19:22:54,618 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44193762441937623 [2021-10-15 19:22:54,618 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 666 transitions. [2021-10-15 19:22:54,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 666 transitions. [2021-10-15 19:22:54,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:54,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 666 transitions. [2021-10-15 19:22:54,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 60.54545454545455) internal successors, (666), 11 states have internal predecessors, (666), 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) [2021-10-15 19:22:54,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:54,625 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:54,625 INFO L186 Difference]: Start difference. First operand has 86 places, 88 transitions, 269 flow. Second operand 11 states and 666 transitions. [2021-10-15 19:22:54,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 164 transitions, 720 flow [2021-10-15 19:22:54,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 164 transitions, 713 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:54,632 INFO L242 Difference]: Finished difference. Result has 100 places, 106 transitions, 427 flow [2021-10-15 19:22:54,633 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=427, PETRI_PLACES=100, PETRI_TRANSITIONS=106} [2021-10-15 19:22:54,633 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 20 predicate places. [2021-10-15 19:22:54,633 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 106 transitions, 427 flow [2021-10-15 19:22:54,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 51.857142857142854) internal successors, (363), 7 states have internal predecessors, (363), 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) [2021-10-15 19:22:54,634 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:54,634 INFO L254 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] [2021-10-15 19:22:54,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:22:54,634 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:54,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:54,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1458355201, now seen corresponding path program 1 times [2021-10-15 19:22:54,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:54,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425128896] [2021-10-15 19:22:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:54,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:54,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:54,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425128896] [2021-10-15 19:22:54,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425128896] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:54,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:54,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:22:54,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742594901] [2021-10-15 19:22:54,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:22:54,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:22:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:22:54,754 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 137 [2021-10-15 19:22:54,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 106 transitions, 427 flow. Second operand has 6 states, 6 states have (on average 52.166666666666664) internal successors, (313), 6 states have internal predecessors, (313), 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) [2021-10-15 19:22:54,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:54,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 137 [2021-10-15 19:22:54,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:55,074 INFO L129 PetriNetUnfolder]: 58/546 cut-off events. [2021-10-15 19:22:55,074 INFO L130 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2021-10-15 19:22:55,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1098 conditions, 546 events. 58/546 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3102 event pairs, 0 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 838. Up to 108 conditions per place. [2021-10-15 19:22:55,078 INFO L132 encePairwiseOnDemand]: 124/137 looper letters, 75 selfloop transitions, 29 changer transitions 0/145 dead transitions. [2021-10-15 19:22:55,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 145 transitions, 817 flow [2021-10-15 19:22:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:22:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:22:55,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 522 transitions. [2021-10-15 19:22:55,081 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4233576642335766 [2021-10-15 19:22:55,082 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 522 transitions. [2021-10-15 19:22:55,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 522 transitions. [2021-10-15 19:22:55,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:55,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 522 transitions. [2021-10-15 19:22:55,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 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) [2021-10-15 19:22:55,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 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) [2021-10-15 19:22:55,088 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 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) [2021-10-15 19:22:55,088 INFO L186 Difference]: Start difference. First operand has 100 places, 106 transitions, 427 flow. Second operand 9 states and 522 transitions. [2021-10-15 19:22:55,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 145 transitions, 817 flow [2021-10-15 19:22:55,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 145 transitions, 793 flow, removed 12 selfloop flow, removed 0 redundant places. [2021-10-15 19:22:55,096 INFO L242 Difference]: Finished difference. Result has 113 places, 124 transitions, 643 flow [2021-10-15 19:22:55,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=643, PETRI_PLACES=113, PETRI_TRANSITIONS=124} [2021-10-15 19:22:55,097 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 33 predicate places. [2021-10-15 19:22:55,097 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 124 transitions, 643 flow [2021-10-15 19:22:55,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.166666666666664) internal successors, (313), 6 states have internal predecessors, (313), 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) [2021-10-15 19:22:55,097 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:55,097 INFO L254 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] [2021-10-15 19:22:55,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:22:55,098 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:55,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:55,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1566334865, now seen corresponding path program 1 times [2021-10-15 19:22:55,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:55,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961065195] [2021-10-15 19:22:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:55,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:22:55,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:55,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961065195] [2021-10-15 19:22:55,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961065195] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:55,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:55,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:22:55,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825617384] [2021-10-15 19:22:55,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:55,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:55,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:55,156 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 137 [2021-10-15 19:22:55,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 124 transitions, 643 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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) [2021-10-15 19:22:55,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:55,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 137 [2021-10-15 19:22:55,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:55,256 INFO L129 PetriNetUnfolder]: 58/520 cut-off events. [2021-10-15 19:22:55,256 INFO L130 PetriNetUnfolder]: For 319/319 co-relation queries the response was YES. [2021-10-15 19:22:55,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 520 events. 58/520 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2848 event pairs, 0 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 832. Up to 96 conditions per place. [2021-10-15 19:22:55,261 INFO L132 encePairwiseOnDemand]: 129/137 looper letters, 37 selfloop transitions, 24 changer transitions 0/122 dead transitions. [2021-10-15 19:22:55,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 122 transitions, 761 flow [2021-10-15 19:22:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2021-10-15 19:22:55,262 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.559610705596107 [2021-10-15 19:22:55,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2021-10-15 19:22:55,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2021-10-15 19:22:55,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:55,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2021-10-15 19:22:55,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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) [2021-10-15 19:22:55,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:55,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:55,265 INFO L186 Difference]: Start difference. First operand has 113 places, 124 transitions, 643 flow. Second operand 3 states and 230 transitions. [2021-10-15 19:22:55,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 122 transitions, 761 flow [2021-10-15 19:22:55,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 122 transitions, 753 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:22:55,279 INFO L242 Difference]: Finished difference. Result has 112 places, 122 transitions, 679 flow [2021-10-15 19:22:55,280 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=679, PETRI_PLACES=112, PETRI_TRANSITIONS=122} [2021-10-15 19:22:55,280 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 32 predicate places. [2021-10-15 19:22:55,280 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 122 transitions, 679 flow [2021-10-15 19:22:55,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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) [2021-10-15 19:22:55,281 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:55,281 INFO L254 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] [2021-10-15 19:22:55,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:22:55,281 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:55,281 INFO L82 PathProgramCache]: Analyzing trace with hash -988757936, now seen corresponding path program 1 times [2021-10-15 19:22:55,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:55,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091583021] [2021-10-15 19:22:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:55,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:55,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:55,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091583021] [2021-10-15 19:22:55,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091583021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:55,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:55,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:22:55,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12723216] [2021-10-15 19:22:55,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:22:55,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:55,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:22:55,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:22:55,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 137 [2021-10-15 19:22:55,469 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 122 transitions, 679 flow. Second operand has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 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) [2021-10-15 19:22:55,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:55,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 137 [2021-10-15 19:22:55,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:55,933 INFO L129 PetriNetUnfolder]: 58/518 cut-off events. [2021-10-15 19:22:55,933 INFO L130 PetriNetUnfolder]: For 429/429 co-relation queries the response was YES. [2021-10-15 19:22:55,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1215 conditions, 518 events. 58/518 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2834 event pairs, 0 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 930. Up to 99 conditions per place. [2021-10-15 19:22:55,938 INFO L132 encePairwiseOnDemand]: 125/137 looper letters, 112 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2021-10-15 19:22:55,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 181 transitions, 1161 flow [2021-10-15 19:22:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:22:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:22:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 661 transitions. [2021-10-15 19:22:55,942 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43861977438619776 [2021-10-15 19:22:55,942 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 661 transitions. [2021-10-15 19:22:55,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 661 transitions. [2021-10-15 19:22:55,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:55,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 661 transitions. [2021-10-15 19:22:55,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 60.09090909090909) internal successors, (661), 11 states have internal predecessors, (661), 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) [2021-10-15 19:22:55,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:55,950 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:55,950 INFO L186 Difference]: Start difference. First operand has 112 places, 122 transitions, 679 flow. Second operand 11 states and 661 transitions. [2021-10-15 19:22:55,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 181 transitions, 1161 flow [2021-10-15 19:22:55,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 181 transitions, 1127 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:22:55,962 INFO L242 Difference]: Finished difference. Result has 123 places, 124 transitions, 732 flow [2021-10-15 19:22:55,963 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=732, PETRI_PLACES=123, PETRI_TRANSITIONS=124} [2021-10-15 19:22:55,963 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 43 predicate places. [2021-10-15 19:22:55,963 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 124 transitions, 732 flow [2021-10-15 19:22:55,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 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) [2021-10-15 19:22:55,965 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:55,965 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:55,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:22:55,966 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1673784940, now seen corresponding path program 1 times [2021-10-15 19:22:55,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:55,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111299335] [2021-10-15 19:22:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:55,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:56,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:56,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111299335] [2021-10-15 19:22:56,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111299335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:22:56,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843828614] [2021-10-15 19:22:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:56,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:22:56,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:22:56,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:22:56,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:22:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:56,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:22:56,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:22:56,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:22:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:22:56,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:22:56,461 INFO L354 Elim1Store]: treesize reduction 190, result has 8.2 percent of original size [2021-10-15 19:22:56,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 74 [2021-10-15 19:22:56,477 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-15 19:22:56,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 91 [2021-10-15 19:22:56,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:22:56,769 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:22:56,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 21 [2021-10-15 19:22:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:56,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843828614] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:56,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:22:56,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-10-15 19:22:56,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090751703] [2021-10-15 19:22:56,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:22:56,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:56,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:22:56,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:22:56,813 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2021-10-15 19:22:56,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 124 transitions, 732 flow. Second operand has 6 states, 6 states have (on average 54.5) internal successors, (327), 6 states have internal predecessors, (327), 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) [2021-10-15 19:22:56,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:56,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2021-10-15 19:22:56,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:57,155 INFO L129 PetriNetUnfolder]: 44/390 cut-off events. [2021-10-15 19:22:57,156 INFO L130 PetriNetUnfolder]: For 396/396 co-relation queries the response was YES. [2021-10-15 19:22:57,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 390 events. 44/390 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1757 event pairs, 0 based on Foata normal form. 2/361 useless extension candidates. Maximal degree in co-relation 714. Up to 93 conditions per place. [2021-10-15 19:22:57,160 INFO L132 encePairwiseOnDemand]: 125/137 looper letters, 89 selfloop transitions, 17 changer transitions 1/150 dead transitions. [2021-10-15 19:22:57,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 937 flow [2021-10-15 19:22:57,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:22:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:22:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 451 transitions. [2021-10-15 19:22:57,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.470281543274244 [2021-10-15 19:22:57,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 451 transitions. [2021-10-15 19:22:57,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 451 transitions. [2021-10-15 19:22:57,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:57,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 451 transitions. [2021-10-15 19:22:57,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 64.42857142857143) internal successors, (451), 7 states have internal predecessors, (451), 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) [2021-10-15 19:22:57,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 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) [2021-10-15 19:22:57,168 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 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) [2021-10-15 19:22:57,168 INFO L186 Difference]: Start difference. First operand has 123 places, 124 transitions, 732 flow. Second operand 7 states and 451 transitions. [2021-10-15 19:22:57,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 937 flow [2021-10-15 19:22:57,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 150 transitions, 892 flow, removed 5 selfloop flow, removed 7 redundant places. [2021-10-15 19:22:57,177 INFO L242 Difference]: Finished difference. Result has 118 places, 113 transitions, 602 flow [2021-10-15 19:22:57,177 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=602, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2021-10-15 19:22:57,178 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 38 predicate places. [2021-10-15 19:22:57,178 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 602 flow [2021-10-15 19:22:57,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.5) internal successors, (327), 6 states have internal predecessors, (327), 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) [2021-10-15 19:22:57,178 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:57,178 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:57,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:22:57,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:22:57,405 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:57,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2026653164, now seen corresponding path program 1 times [2021-10-15 19:22:57,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:57,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065292091] [2021-10-15 19:22:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:57,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:57,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:57,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065292091] [2021-10-15 19:22:57,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065292091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:22:57,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812203046] [2021-10-15 19:22:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:57,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:22:57,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:22:57,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:22:57,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:22:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:57,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:22:57,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:22:57,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:22:57,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:22:57,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:22:57,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-15 19:22:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:22:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-15 19:22:58,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:22:58,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-10-15 19:22:58,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:22:58,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-10-15 19:22:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:58,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812203046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:22:58,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:22:58,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-10-15 19:22:58,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485930027] [2021-10-15 19:22:58,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:22:58,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:22:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:22:58,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 137 [2021-10-15 19:22:58,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 602 flow. Second operand has 8 states, 8 states have (on average 59.75) internal successors, (478), 8 states have internal predecessors, (478), 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) [2021-10-15 19:22:58,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:58,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 137 [2021-10-15 19:22:58,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:58,381 INFO L129 PetriNetUnfolder]: 29/274 cut-off events. [2021-10-15 19:22:58,382 INFO L130 PetriNetUnfolder]: For 347/347 co-relation queries the response was YES. [2021-10-15 19:22:58,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 274 events. 29/274 cut-off events. For 347/347 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 959 event pairs, 0 based on Foata normal form. 3/258 useless extension candidates. Maximal degree in co-relation 494. Up to 47 conditions per place. [2021-10-15 19:22:58,384 INFO L132 encePairwiseOnDemand]: 124/137 looper letters, 53 selfloop transitions, 26 changer transitions 0/127 dead transitions. [2021-10-15 19:22:58,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 127 transitions, 780 flow [2021-10-15 19:22:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:22:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:22:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 635 transitions. [2021-10-15 19:22:58,388 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4635036496350365 [2021-10-15 19:22:58,388 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 635 transitions. [2021-10-15 19:22:58,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 635 transitions. [2021-10-15 19:22:58,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:58,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 635 transitions. [2021-10-15 19:22:58,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 63.5) internal successors, (635), 10 states have internal predecessors, (635), 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) [2021-10-15 19:22:58,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 137.0) internal successors, (1507), 11 states have internal predecessors, (1507), 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) [2021-10-15 19:22:58,395 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 137.0) internal successors, (1507), 11 states have internal predecessors, (1507), 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) [2021-10-15 19:22:58,395 INFO L186 Difference]: Start difference. First operand has 118 places, 113 transitions, 602 flow. Second operand 10 states and 635 transitions. [2021-10-15 19:22:58,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 127 transitions, 780 flow [2021-10-15 19:22:58,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 127 transitions, 750 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-10-15 19:22:58,403 INFO L242 Difference]: Finished difference. Result has 126 places, 114 transitions, 647 flow [2021-10-15 19:22:58,404 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=647, PETRI_PLACES=126, PETRI_TRANSITIONS=114} [2021-10-15 19:22:58,404 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 46 predicate places. [2021-10-15 19:22:58,404 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 114 transitions, 647 flow [2021-10-15 19:22:58,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 59.75) internal successors, (478), 8 states have internal predecessors, (478), 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) [2021-10-15 19:22:58,405 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:58,405 INFO L254 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] [2021-10-15 19:22:58,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:22:58,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:22:58,633 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash -60775922, now seen corresponding path program 1 times [2021-10-15 19:22:58,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:58,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458489130] [2021-10-15 19:22:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:58,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:58,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:58,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458489130] [2021-10-15 19:22:58,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458489130] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:58,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:58,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:22:58,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133178113] [2021-10-15 19:22:58,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:58,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:58,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:58,660 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 137 [2021-10-15 19:22:58,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 114 transitions, 647 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2021-10-15 19:22:58,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:58,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 137 [2021-10-15 19:22:58,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:58,723 INFO L129 PetriNetUnfolder]: 36/391 cut-off events. [2021-10-15 19:22:58,723 INFO L130 PetriNetUnfolder]: For 381/381 co-relation queries the response was YES. [2021-10-15 19:22:58,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 391 events. 36/391 cut-off events. For 381/381 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1573 event pairs, 0 based on Foata normal form. 3/358 useless extension candidates. Maximal degree in co-relation 625. Up to 26 conditions per place. [2021-10-15 19:22:58,727 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 12 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2021-10-15 19:22:58,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 118 transitions, 700 flow [2021-10-15 19:22:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2021-10-15 19:22:58,729 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6642335766423357 [2021-10-15 19:22:58,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2021-10-15 19:22:58,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2021-10-15 19:22:58,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:58,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2021-10-15 19:22:58,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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) [2021-10-15 19:22:58,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:58,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-10-15 19:22:58,732 INFO L186 Difference]: Start difference. First operand has 126 places, 114 transitions, 647 flow. Second operand 3 states and 273 transitions. [2021-10-15 19:22:58,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 118 transitions, 700 flow [2021-10-15 19:22:58,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 118 transitions, 673 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-10-15 19:22:58,742 INFO L242 Difference]: Finished difference. Result has 125 places, 117 transitions, 667 flow [2021-10-15 19:22:58,742 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=667, PETRI_PLACES=125, PETRI_TRANSITIONS=117} [2021-10-15 19:22:58,742 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 45 predicate places. [2021-10-15 19:22:58,742 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 117 transitions, 667 flow [2021-10-15 19:22:58,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2021-10-15 19:22:58,743 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:58,743 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:58,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:22:58,744 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:58,744 INFO L82 PathProgramCache]: Analyzing trace with hash 830518973, now seen corresponding path program 1 times [2021-10-15 19:22:58,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:58,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370154692] [2021-10-15 19:22:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:58,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:58,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:58,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370154692] [2021-10-15 19:22:58,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370154692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:22:58,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667439586] [2021-10-15 19:22:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:58,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:22:58,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:22:58,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:22:58,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:22:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:58,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:22:58,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:22:58,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:22:58,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:22:59,028 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-15 19:22:59,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-15 19:22:59,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:22:59,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-15 19:22:59,335 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-15 19:22:59,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-10-15 19:22:59,343 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-15 19:22:59,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-10-15 19:22:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:22:59,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667439586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:22:59,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:22:59,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-15 19:22:59,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021305469] [2021-10-15 19:22:59,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:22:59,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:22:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:22:59,365 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 137 [2021-10-15 19:22:59,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 117 transitions, 667 flow. Second operand has 7 states, 7 states have (on average 61.57142857142857) internal successors, (431), 7 states have internal predecessors, (431), 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) [2021-10-15 19:22:59,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:59,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 137 [2021-10-15 19:22:59,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:59,738 INFO L129 PetriNetUnfolder]: 41/498 cut-off events. [2021-10-15 19:22:59,739 INFO L130 PetriNetUnfolder]: For 581/581 co-relation queries the response was YES. [2021-10-15 19:22:59,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1269 conditions, 498 events. 41/498 cut-off events. For 581/581 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2263 event pairs, 0 based on Foata normal form. 6/466 useless extension candidates. Maximal degree in co-relation 971. Up to 80 conditions per place. [2021-10-15 19:22:59,743 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 66 selfloop transitions, 20 changer transitions 17/151 dead transitions. [2021-10-15 19:22:59,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 151 transitions, 1061 flow [2021-10-15 19:22:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:22:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:22:59,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 703 transitions. [2021-10-15 19:22:59,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46648971466489714 [2021-10-15 19:22:59,747 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 703 transitions. [2021-10-15 19:22:59,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 703 transitions. [2021-10-15 19:22:59,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:59,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 703 transitions. [2021-10-15 19:22:59,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 63.90909090909091) internal successors, (703), 11 states have internal predecessors, (703), 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) [2021-10-15 19:22:59,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:59,755 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:22:59,756 INFO L186 Difference]: Start difference. First operand has 125 places, 117 transitions, 667 flow. Second operand 11 states and 703 transitions. [2021-10-15 19:22:59,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 151 transitions, 1061 flow [2021-10-15 19:22:59,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 151 transitions, 1041 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:59,767 INFO L242 Difference]: Finished difference. Result has 137 places, 111 transitions, 660 flow [2021-10-15 19:22:59,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=660, PETRI_PLACES=137, PETRI_TRANSITIONS=111} [2021-10-15 19:22:59,768 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 57 predicate places. [2021-10-15 19:22:59,768 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 111 transitions, 660 flow [2021-10-15 19:22:59,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.57142857142857) internal successors, (431), 7 states have internal predecessors, (431), 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) [2021-10-15 19:22:59,769 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:59,769 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:59,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:22:59,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 19:22:59,984 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:22:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:59,984 INFO L82 PathProgramCache]: Analyzing trace with hash 589569704, now seen corresponding path program 1 times [2021-10-15 19:22:59,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:59,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083590190] [2021-10-15 19:22:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:59,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:00,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:00,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083590190] [2021-10-15 19:23:00,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083590190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:00,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136384074] [2021-10-15 19:23:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:00,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:00,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:00,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:23:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-15 19:23:00,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:00,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:23:00,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:23:00,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:23:00,738 INFO L354 Elim1Store]: treesize reduction 76, result has 24.8 percent of original size [2021-10-15 19:23:00,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 74 [2021-10-15 19:23:00,776 INFO L354 Elim1Store]: treesize reduction 84, result has 16.8 percent of original size [2021-10-15 19:23:00,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2021-10-15 19:23:00,853 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 19:23:00,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 19:23:01,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:01,699 INFO L354 Elim1Store]: treesize reduction 710, result has 11.1 percent of original size [2021-10-15 19:23:01,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 660 treesize of output 419 [2021-10-15 19:23:01,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:01,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:23:01,925 INFO L354 Elim1Store]: treesize reduction 1120, result has 6.7 percent of original size [2021-10-15 19:23:01,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 543 treesize of output 460 [2021-10-15 19:23:01,963 INFO L354 Elim1Store]: treesize reduction 20, result has 62.3 percent of original size [2021-10-15 19:23:01,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 469 treesize of output 481 [2021-10-15 19:23:02,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:02,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:02,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:02,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:23:02,048 INFO L354 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2021-10-15 19:23:02,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 127 treesize of output 83 [2021-10-15 19:23:02,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:02,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:02,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:02,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:23:02,149 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-10-15 19:23:02,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 103 treesize of output 43 [2021-10-15 19:23:03,568 INFO L354 Elim1Store]: treesize reduction 154, result has 0.6 percent of original size [2021-10-15 19:23:03,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 182 treesize of output 88 [2021-10-15 19:23:03,586 INFO L354 Elim1Store]: treesize reduction 154, result has 0.6 percent of original size [2021-10-15 19:23:03,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 40 [2021-10-15 19:23:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:03,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136384074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:03,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:03,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-10-15 19:23:03,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490190633] [2021-10-15 19:23:03,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:23:03,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:03,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:23:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:23:03,609 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2021-10-15 19:23:03,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 111 transitions, 660 flow. Second operand has 13 states, 13 states have (on average 54.07692307692308) internal successors, (703), 13 states have internal predecessors, (703), 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) [2021-10-15 19:23:03,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:23:03,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2021-10-15 19:23:03,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:23:21,102 INFO L129 PetriNetUnfolder]: 78/885 cut-off events. [2021-10-15 19:23:21,102 INFO L130 PetriNetUnfolder]: For 1015/1015 co-relation queries the response was YES. [2021-10-15 19:23:21,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 885 events. 78/885 cut-off events. For 1015/1015 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5480 event pairs, 0 based on Foata normal form. 2/809 useless extension candidates. Maximal degree in co-relation 1991. Up to 90 conditions per place. [2021-10-15 19:23:21,110 INFO L132 encePairwiseOnDemand]: 124/137 looper letters, 113 selfloop transitions, 42 changer transitions 1/200 dead transitions. [2021-10-15 19:23:21,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 200 transitions, 1539 flow [2021-10-15 19:23:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 19:23:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 19:23:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1217 transitions. [2021-10-15 19:23:21,116 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4230100799443865 [2021-10-15 19:23:21,116 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1217 transitions. [2021-10-15 19:23:21,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1217 transitions. [2021-10-15 19:23:21,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:23:21,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1217 transitions. [2021-10-15 19:23:21,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.95238095238095) internal successors, (1217), 21 states have internal predecessors, (1217), 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) [2021-10-15 19:23:21,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 137.0) internal successors, (3014), 22 states have internal predecessors, (3014), 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) [2021-10-15 19:23:21,130 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 137.0) internal successors, (3014), 22 states have internal predecessors, (3014), 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) [2021-10-15 19:23:21,130 INFO L186 Difference]: Start difference. First operand has 137 places, 111 transitions, 660 flow. Second operand 21 states and 1217 transitions. [2021-10-15 19:23:21,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 200 transitions, 1539 flow [2021-10-15 19:23:21,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 200 transitions, 1432 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-10-15 19:23:21,147 INFO L242 Difference]: Finished difference. Result has 147 places, 141 transitions, 994 flow [2021-10-15 19:23:21,148 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=994, PETRI_PLACES=147, PETRI_TRANSITIONS=141} [2021-10-15 19:23:21,148 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 67 predicate places. [2021-10-15 19:23:21,148 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 141 transitions, 994 flow [2021-10-15 19:23:21,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.07692307692308) internal successors, (703), 13 states have internal predecessors, (703), 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) [2021-10-15 19:23:21,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:23:21,149 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:21,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:21,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 19:23:21,371 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:23:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1899110890, now seen corresponding path program 1 times [2021-10-15 19:23:21,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:21,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211692405] [2021-10-15 19:23:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:21,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:21,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:21,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211692405] [2021-10-15 19:23:21,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211692405] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:21,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:21,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:23:21,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235850544] [2021-10-15 19:23:21,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:23:21,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:23:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:23:21,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 137 [2021-10-15 19:23:21,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 141 transitions, 994 flow. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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) [2021-10-15 19:23:21,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:23:21,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 137 [2021-10-15 19:23:21,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:23:21,645 INFO L129 PetriNetUnfolder]: 75/882 cut-off events. [2021-10-15 19:23:21,645 INFO L130 PetriNetUnfolder]: For 1043/1043 co-relation queries the response was YES. [2021-10-15 19:23:21,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2226 conditions, 882 events. 75/882 cut-off events. For 1043/1043 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5471 event pairs, 0 based on Foata normal form. 0/801 useless extension candidates. Maximal degree in co-relation 2057. Up to 325 conditions per place. [2021-10-15 19:23:21,655 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 80 selfloop transitions, 12 changer transitions 0/143 dead transitions. [2021-10-15 19:23:21,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 143 transitions, 1184 flow [2021-10-15 19:23:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:23:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:23:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 266 transitions. [2021-10-15 19:23:21,659 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4854014598540146 [2021-10-15 19:23:21,659 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 266 transitions. [2021-10-15 19:23:21,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 266 transitions. [2021-10-15 19:23:21,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:23:21,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 266 transitions. [2021-10-15 19:23:21,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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) [2021-10-15 19:23:21,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2021-10-15 19:23:21,665 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2021-10-15 19:23:21,665 INFO L186 Difference]: Start difference. First operand has 147 places, 141 transitions, 994 flow. Second operand 4 states and 266 transitions. [2021-10-15 19:23:21,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 143 transitions, 1184 flow [2021-10-15 19:23:21,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 143 transitions, 1111 flow, removed 24 selfloop flow, removed 3 redundant places. [2021-10-15 19:23:21,686 INFO L242 Difference]: Finished difference. Result has 148 places, 142 transitions, 953 flow [2021-10-15 19:23:21,687 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=953, PETRI_PLACES=148, PETRI_TRANSITIONS=142} [2021-10-15 19:23:21,687 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 68 predicate places. [2021-10-15 19:23:21,687 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 142 transitions, 953 flow [2021-10-15 19:23:21,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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) [2021-10-15 19:23:21,688 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:23:21,688 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:21,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-15 19:23:21,688 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:23:21,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:21,689 INFO L82 PathProgramCache]: Analyzing trace with hash 878042536, now seen corresponding path program 1 times [2021-10-15 19:23:21,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:21,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682123377] [2021-10-15 19:23:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:21,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:22,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:22,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682123377] [2021-10-15 19:23:22,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682123377] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:22,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025382069] [2021-10-15 19:23:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:22,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:22,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:22,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:22,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:23:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:22,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-15 19:23:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:22,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:23:22,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:22,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:22,402 INFO L354 Elim1Store]: treesize reduction 190, result has 8.2 percent of original size [2021-10-15 19:23:22,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 146 [2021-10-15 19:23:22,428 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-10-15 19:23:22,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 197 treesize of output 201 [2021-10-15 19:23:22,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:22,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:23:22,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:22,442 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-15 19:23:22,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 88 [2021-10-15 19:23:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:22,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:23:22,939 INFO L354 Elim1Store]: treesize reduction 186, result has 18.8 percent of original size [2021-10-15 19:23:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 150 treesize of output 146 [2021-10-15 19:23:22,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:23:22,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:23:22,992 INFO L354 Elim1Store]: treesize reduction 120, result has 20.5 percent of original size [2021-10-15 19:23:22,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 137 treesize of output 106 [2021-10-15 19:23:23,014 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-10-15 19:23:23,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 126 [2021-10-15 19:23:23,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:23:23,637 INFO L354 Elim1Store]: treesize reduction 120, result has 16.7 percent of original size [2021-10-15 19:23:23,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 164 treesize of output 123 [2021-10-15 19:23:23,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:23:23,681 INFO L354 Elim1Store]: treesize reduction 194, result has 13.4 percent of original size [2021-10-15 19:23:23,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 156 treesize of output 163 [2021-10-15 19:23:25,500 INFO L354 Elim1Store]: treesize reduction 177, result has 6.3 percent of original size [2021-10-15 19:23:25,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 160 treesize of output 99 [2021-10-15 19:23:25,541 INFO L354 Elim1Store]: treesize reduction 150, result has 2.0 percent of original size [2021-10-15 19:23:25,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 52 [2021-10-15 19:23:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:25,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025382069] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:25,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:25,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-10-15 19:23:25,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786432282] [2021-10-15 19:23:25,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 19:23:25,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:25,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 19:23:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-15 19:23:25,561 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 137 [2021-10-15 19:23:25,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 142 transitions, 953 flow. Second operand has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 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) [2021-10-15 19:23:25,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:23:25,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 137 [2021-10-15 19:23:25,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:23:34,828 INFO L129 PetriNetUnfolder]: 150/1786 cut-off events. [2021-10-15 19:23:34,829 INFO L130 PetriNetUnfolder]: For 1792/1792 co-relation queries the response was YES. [2021-10-15 19:23:34,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4546 conditions, 1786 events. 150/1786 cut-off events. For 1792/1792 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 14387 event pairs, 0 based on Foata normal form. 0/1619 useless extension candidates. Maximal degree in co-relation 4195. Up to 326 conditions per place. [2021-10-15 19:23:34,843 INFO L132 encePairwiseOnDemand]: 119/137 looper letters, 232 selfloop transitions, 71 changer transitions 1/345 dead transitions. [2021-10-15 19:23:34,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 345 transitions, 2742 flow [2021-10-15 19:23:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-15 19:23:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-15 19:23:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1830 transitions. [2021-10-15 19:23:34,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41742700729927007 [2021-10-15 19:23:34,850 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1830 transitions. [2021-10-15 19:23:34,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1830 transitions. [2021-10-15 19:23:34,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:23:34,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1830 transitions. [2021-10-15 19:23:34,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.1875) internal successors, (1830), 32 states have internal predecessors, (1830), 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) [2021-10-15 19:23:34,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 137.0) internal successors, (4521), 33 states have internal predecessors, (4521), 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) [2021-10-15 19:23:34,867 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 137.0) internal successors, (4521), 33 states have internal predecessors, (4521), 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) [2021-10-15 19:23:34,868 INFO L186 Difference]: Start difference. First operand has 148 places, 142 transitions, 953 flow. Second operand 32 states and 1830 transitions. [2021-10-15 19:23:34,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 345 transitions, 2742 flow [2021-10-15 19:23:34,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 345 transitions, 2727 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:23:34,893 INFO L242 Difference]: Finished difference. Result has 190 places, 195 transitions, 1681 flow [2021-10-15 19:23:34,894 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1681, PETRI_PLACES=190, PETRI_TRANSITIONS=195} [2021-10-15 19:23:34,894 INFO L334 CegarLoopForPetriNet]: 80 programPoint places, 110 predicate places. [2021-10-15 19:23:34,894 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 195 transitions, 1681 flow [2021-10-15 19:23:34,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 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) [2021-10-15 19:23:34,895 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:23:34,895 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:34,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:35,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:35,116 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-15 19:23:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:35,117 INFO L82 PathProgramCache]: Analyzing trace with hash -648373053, now seen corresponding path program 1 times [2021-10-15 19:23:35,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:35,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585918025] [2021-10-15 19:23:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:35,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:23:35,148 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:23:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:23:35,200 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:23:35,200 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:23:35,202 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,204 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,204 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,204 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,204 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:23:35,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-15 19:23:35,214 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:23:35,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:23:35 BoogieIcfgContainer [2021-10-15 19:23:35,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:23:35,278 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:23:35,279 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:23:35,279 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:23:35,280 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:22:52" (3/4) ... [2021-10-15 19:23:35,282 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:23:35,320 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:23:35,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:23:35,321 INFO L168 Benchmark]: Toolchain (without parser) took 44631.52 ms. Allocated memory was 92.3 MB in the beginning and 161.5 MB in the end (delta: 69.2 MB). Free memory was 57.5 MB in the beginning and 112.0 MB in the end (delta: -54.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:35,322 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 47.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:23:35,322 INFO L168 Benchmark]: CACSL2BoogieTranslator took 587.21 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 57.2 MB in the beginning and 77.1 MB in the end (delta: -19.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:35,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.50 ms. Allocated memory is still 111.1 MB. Free memory was 77.1 MB in the beginning and 75.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:35,323 INFO L168 Benchmark]: Boogie Preprocessor took 52.31 ms. Allocated memory is still 111.1 MB. Free memory was 75.0 MB in the beginning and 72.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:35,323 INFO L168 Benchmark]: RCFGBuilder took 662.03 ms. Allocated memory is still 111.1 MB. Free memory was 72.9 MB in the beginning and 54.0 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:35,324 INFO L168 Benchmark]: TraceAbstraction took 43223.44 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 53.3 MB in the beginning and 115.1 MB in the end (delta: -61.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:23:35,324 INFO L168 Benchmark]: Witness Printer took 41.94 ms. Allocated memory is still 161.5 MB. Free memory was 115.1 MB in the beginning and 112.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:35,326 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 47.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 587.21 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 57.2 MB in the beginning and 77.1 MB in the end (delta: -19.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.50 ms. Allocated memory is still 111.1 MB. Free memory was 77.1 MB in the beginning and 75.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.31 ms. Allocated memory is still 111.1 MB. Free memory was 75.0 MB in the beginning and 72.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 662.03 ms. Allocated memory is still 111.1 MB. Free memory was 72.9 MB in the beginning and 54.0 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 43223.44 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 53.3 MB in the beginning and 115.1 MB in the end (delta: -61.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 41.94 ms. Allocated memory is still 161.5 MB. Free memory was 115.1 MB in the beginning and 112.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1036]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1002] SLL* list = malloc(sizeof(SLL)); [L1003] list->next = ((void*)0) [L1004] COND FALSE !(!(list != ((void*)0))) [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1004] list->inner = malloc(sizeof(SLL)) [L1004] EXPR list->inner [L1004] list->inner->next = ((void*)0) [L1004] EXPR list->inner [L1004] list->inner->inner = ((void*)0) [L1004] EXPR list->inner [L1004] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L1004] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1006] SLL* end = list; [L1009] COND FALSE !(__VERIFIER_nondet_int()) [L1019] end = ((void*)0) [L1020] end = list [L1023] COND FALSE !(!(((void*)0) != end)) [L1025] COND TRUE ((void*)0) != end [L1027] int len = 0; [L1028] EXPR end->inner [L1028] SLL* inner = end->inner; [L1029] COND TRUE ((void*)0) != inner [L1031] COND TRUE len == 0 [L1032] len = 1 [L1035] COND FALSE !(!(((void*)0) != inner)) [L1036] EXPR inner->inner [L1036] COND FALSE !(!(((void*)0) == inner->inner)) [L1037] EXPR inner->next [L1037] COND FALSE !(!(((void*)0) == inner->next)) [L1038] EXPR inner->inner [L1038] inner = inner->inner [L1039] COND TRUE len == 1 [L1040] EXPR inner->inner [L1040] inner = inner->inner [L1029] COND TRUE ((void*)0) != inner [L1031] COND FALSE !(len == 0) [L1034] len = 2 [L1035] COND FALSE !(!(((void*)0) != inner)) [L1036] EXPR inner->inner [L1036] COND TRUE !(((void*)0) == inner->inner) [L1036] reach_error() - UnprovableResult [Line: 1004]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1004]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1055]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1056]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 13 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 43076.0ms, OverallIterations: 21, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 30690.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 57.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 319 SDtfs, 903 SDslu, 558 SDs, 0 SdLazy, 2594 SolverSat, 243 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 22752.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 330 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 6318.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1681occurred in iteration=20, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 125.3ms SsaConstructionTime, 490.8ms SatisfiabilityAnalysisTime, 9580.2ms InterpolantComputationTime, 664 NumberOfCodeBlocks, 664 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 603 ConstructedInterpolants, 37 QuantifiedInterpolants, 13194 SizeOfPredicates, 31 NumberOfNonLiveVariables, 610 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 25 InterpolantComputations, 16 PerfectInterpolantSequences, 12/26 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:23:35,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c33a1a-d3f0-483a-bdb3-c66dd49e7bcd/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...