./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro --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 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:40:44,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:40:44,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:40:44,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:40:44,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:40:44,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:40:44,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:40:44,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:40:44,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:40:44,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:40:44,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:40:44,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:40:44,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:40:44,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:40:44,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:40:44,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:40:44,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:40:44,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:40:44,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:40:44,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:40:44,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:40:44,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:40:44,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:40:44,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:40:44,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:40:44,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:40:44,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:40:44,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:40:44,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:40:44,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:40:44,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:40:44,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:40:44,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:40:44,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:40:44,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:40:44,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:40:44,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:40:44,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:40:44,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:40:44,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:40:44,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:40:44,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:40:44,629 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:40:44,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:40:44,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:40:44,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:40:44,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:40:44,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:40:44,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:40:44,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:40:44,632 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:40:44,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:40:44,633 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:40:44,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:40:44,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:40:44,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:40:44,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:40:44,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:40:44,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:40:44,634 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:40:44,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:40:44,635 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:40:44,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:40:44,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:40:44,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:40:44,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:40:44,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:40:44,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:40:44,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:40:44,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:40:44,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:40:44,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:40:44,637 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:40:44,637 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:40:44,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:40:44,638 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_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f [2022-11-18 20:40:44,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:40:44,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:40:44,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:40:44,930 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:40:44,931 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:40:44,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-11-18 20:40:45,012 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/data/98b1e7e6c/d8f096f7334f419286827e89047e8e3a/FLAG858ecf8bb [2022-11-18 20:40:45,514 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:40:45,517 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-11-18 20:40:45,541 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/data/98b1e7e6c/d8f096f7334f419286827e89047e8e3a/FLAG858ecf8bb [2022-11-18 20:40:45,818 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/data/98b1e7e6c/d8f096f7334f419286827e89047e8e3a [2022-11-18 20:40:45,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:40:45,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:40:45,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:40:45,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:40:45,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:40:45,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:40:45" (1/1) ... [2022-11-18 20:40:45,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b4a7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:45, skipping insertion in model container [2022-11-18 20:40:45,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:40:45" (1/1) ... [2022-11-18 20:40:45,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:40:45,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:40:46,114 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-18 20:40:46,471 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-11-18 20:40:46,477 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-11-18 20:40:46,478 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-11-18 20:40:46,562 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-11-18 20:40:46,563 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-11-18 20:40:46,566 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-11-18 20:40:46,567 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-11-18 20:40:46,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:40:46,588 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:40:46,607 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-18 20:40:46,627 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-11-18 20:40:46,628 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-11-18 20:40:46,628 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-11-18 20:40:46,638 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-11-18 20:40:46,639 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-11-18 20:40:46,640 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-11-18 20:40:46,641 WARN L234 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_c643b12e-3cca-43c0-b291-b2100c98c649/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-11-18 20:40:46,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:40:46,702 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:40:46,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46 WrapperNode [2022-11-18 20:40:46,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:40:46,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:40:46,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:40:46,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:40:46,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,755 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 203 [2022-11-18 20:40:46,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:40:46,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:40:46,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:40:46,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:40:46,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,795 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:40:46,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:40:46,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:40:46,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:40:46,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (1/1) ... [2022-11-18 20:40:46,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:40:46,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:40:46,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:40:46,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c643b12e-3cca-43c0-b291-b2100c98c649/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:40:46,900 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-11-18 20:40:46,900 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-11-18 20:40:46,900 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-11-18 20:40:46,901 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-11-18 20:40:46,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:40:46,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:40:46,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:40:46,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:40:46,901 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 20:40:46,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:40:46,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:40:46,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:40:46,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:40:46,904 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:40:47,127 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:40:47,129 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:40:47,474 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:40:47,484 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:40:47,484 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-18 20:40:47,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:40:47 BoogieIcfgContainer [2022-11-18 20:40:47,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:40:47,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:40:47,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:40:47,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:40:47,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:40:45" (1/3) ... [2022-11-18 20:40:47,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121e31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:40:47, skipping insertion in model container [2022-11-18 20:40:47,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:46" (2/3) ... [2022-11-18 20:40:47,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121e31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:40:47, skipping insertion in model container [2022-11-18 20:40:47,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:40:47" (3/3) ... [2022-11-18 20:40:47,496 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2022-11-18 20:40:47,505 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:40:47,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:40:47,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-18 20:40:47,516 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:40:47,648 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:40:47,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 233 transitions, 482 flow [2022-11-18 20:40:47,811 INFO L130 PetriNetUnfolder]: 17/231 cut-off events. [2022-11-18 20:40:47,811 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:40:47,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 231 events. 17/231 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 462 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2022-11-18 20:40:47,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 233 transitions, 482 flow [2022-11-18 20:40:47,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 220 transitions, 449 flow [2022-11-18 20:40:47,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:40:47,843 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5cb94657, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:40:47,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-18 20:40:47,889 INFO L130 PetriNetUnfolder]: 11/188 cut-off events. [2022-11-18 20:40:47,889 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:40:47,889 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:40:47,890 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:47,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-11-18 20:40:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash 508547485, now seen corresponding path program 1 times [2022-11-18 20:40:47,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:40:47,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387287999] [2022-11-18 20:40:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:47,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:40:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:49,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:40:49,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387287999] [2022-11-18 20:40:49,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387287999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:40:49,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:40:49,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-18 20:40:49,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488704190] [2022-11-18 20:40:49,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:40:49,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:40:49,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:40:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:40:49,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:40:49,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 233 [2022-11-18 20:40:49,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 220 transitions, 449 flow. Second operand has 18 states, 18 states have (on average 138.16666666666666) internal successors, (2487), 18 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:49,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:40:49,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 233 [2022-11-18 20:40:49,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:40:56,738 INFO L130 PetriNetUnfolder]: 6891/21160 cut-off events. [2022-11-18 20:40:56,739 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-11-18 20:40:56,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30740 conditions, 21160 events. 6891/21160 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 233677 event pairs, 3603 based on Foata normal form. 1581/20932 useless extension candidates. Maximal degree in co-relation 30525. Up to 7338 conditions per place. [2022-11-18 20:40:56,919 INFO L137 encePairwiseOnDemand]: 201/233 looper letters, 182 selfloop transitions, 40 changer transitions 0/350 dead transitions. [2022-11-18 20:40:56,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 350 transitions, 1174 flow [2022-11-18 20:40:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:40:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-18 20:40:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3769 transitions. [2022-11-18 20:40:56,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.622152525586002 [2022-11-18 20:40:56,946 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3769 transitions. [2022-11-18 20:40:56,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3769 transitions. [2022-11-18 20:40:56,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:40:56,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3769 transitions. [2022-11-18 20:40:56,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 144.96153846153845) internal successors, (3769), 26 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:56,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 233.0) internal successors, (6291), 27 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:56,994 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 233.0) internal successors, (6291), 27 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:56,996 INFO L175 Difference]: Start difference. First operand has 210 places, 220 transitions, 449 flow. Second operand 26 states and 3769 transitions. [2022-11-18 20:40:56,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 350 transitions, 1174 flow [2022-11-18 20:40:57,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 350 transitions, 1161 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 20:40:57,017 INFO L231 Difference]: Finished difference. Result has 242 places, 241 transitions, 636 flow [2022-11-18 20:40:57,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=636, PETRI_PLACES=242, PETRI_TRANSITIONS=241} [2022-11-18 20:40:57,025 INFO L288 CegarLoopForPetriNet]: 210 programPoint places, 32 predicate places. [2022-11-18 20:40:57,026 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 241 transitions, 636 flow [2022-11-18 20:40:57,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 138.16666666666666) internal successors, (2487), 18 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:57,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:40:57,029 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:57,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:40:57,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-11-18 20:40:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1573639700, now seen corresponding path program 1 times [2022-11-18 20:40:57,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:40:57,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381612080] [2022-11-18 20:40:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:57,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:40:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:58,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:40:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381612080] [2022-11-18 20:40:58,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381612080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:40:58,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:40:58,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-18 20:40:58,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830056525] [2022-11-18 20:40:58,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:40:58,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:40:58,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:40:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:40:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:40:58,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 233 [2022-11-18 20:40:58,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 241 transitions, 636 flow. Second operand has 20 states, 20 states have (on average 136.9) internal successors, (2738), 20 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:58,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:40:58,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 233 [2022-11-18 20:40:58,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:41:06,254 INFO L130 PetriNetUnfolder]: 8787/26100 cut-off events. [2022-11-18 20:41:06,254 INFO L131 PetriNetUnfolder]: For 2473/2479 co-relation queries the response was YES. [2022-11-18 20:41:06,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40949 conditions, 26100 events. 8787/26100 cut-off events. For 2473/2479 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 299611 event pairs, 1445 based on Foata normal form. 31/24401 useless extension candidates. Maximal degree in co-relation 39805. Up to 8791 conditions per place. [2022-11-18 20:41:06,441 INFO L137 encePairwiseOnDemand]: 209/233 looper letters, 221 selfloop transitions, 67 changer transitions 8/424 dead transitions. [2022-11-18 20:41:06,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 424 transitions, 1675 flow [2022-11-18 20:41:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:41:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 20:41:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3219 transitions. [2022-11-18 20:41:06,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6279750292625829 [2022-11-18 20:41:06,450 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3219 transitions. [2022-11-18 20:41:06,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3219 transitions. [2022-11-18 20:41:06,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:41:06,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3219 transitions. [2022-11-18 20:41:06,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 146.3181818181818) internal successors, (3219), 22 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:06,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 233.0) internal successors, (5359), 23 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:06,471 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 233.0) internal successors, (5359), 23 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:06,472 INFO L175 Difference]: Start difference. First operand has 242 places, 241 transitions, 636 flow. Second operand 22 states and 3219 transitions. [2022-11-18 20:41:06,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 424 transitions, 1675 flow [2022-11-18 20:41:06,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 424 transitions, 1664 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 20:41:06,503 INFO L231 Difference]: Finished difference. Result has 267 places, 286 transitions, 1026 flow [2022-11-18 20:41:06,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1026, PETRI_PLACES=267, PETRI_TRANSITIONS=286} [2022-11-18 20:41:06,505 INFO L288 CegarLoopForPetriNet]: 210 programPoint places, 57 predicate places. [2022-11-18 20:41:06,505 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 286 transitions, 1026 flow [2022-11-18 20:41:06,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 136.9) internal successors, (2738), 20 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:06,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:41:06,508 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:06,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:41:06,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-11-18 20:41:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:06,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1121263530, now seen corresponding path program 1 times [2022-11-18 20:41:06,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:06,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21729685] [2022-11-18 20:41:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:06,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:08,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:08,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21729685] [2022-11-18 20:41:08,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21729685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:41:08,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:41:08,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-18 20:41:08,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161731155] [2022-11-18 20:41:08,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:41:08,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:41:08,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:08,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:41:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:41:08,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 233 [2022-11-18 20:41:08,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 286 transitions, 1026 flow. Second operand has 25 states, 25 states have (on average 131.72) internal successors, (3293), 25 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:08,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:41:08,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 233 [2022-11-18 20:41:08,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:41:22,753 INFO L130 PetriNetUnfolder]: 20350/56173 cut-off events. [2022-11-18 20:41:22,753 INFO L131 PetriNetUnfolder]: For 22511/22539 co-relation queries the response was YES. [2022-11-18 20:41:22,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102649 conditions, 56173 events. 20350/56173 cut-off events. For 22511/22539 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 692192 event pairs, 3305 based on Foata normal form. 105/53064 useless extension candidates. Maximal degree in co-relation 100590. Up to 14605 conditions per place. [2022-11-18 20:41:23,142 INFO L137 encePairwiseOnDemand]: 204/233 looper letters, 580 selfloop transitions, 160 changer transitions 2/865 dead transitions. [2022-11-18 20:41:23,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 865 transitions, 4698 flow [2022-11-18 20:41:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:41:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-18 20:41:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5363 transitions. [2022-11-18 20:41:23,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.622085604918223 [2022-11-18 20:41:23,156 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5363 transitions. [2022-11-18 20:41:23,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5363 transitions. [2022-11-18 20:41:23,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:41:23,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5363 transitions. [2022-11-18 20:41:23,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 144.94594594594594) internal successors, (5363), 37 states have internal predecessors, (5363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:23,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 233.0) internal successors, (8854), 38 states have internal predecessors, (8854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:23,189 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 233.0) internal successors, (8854), 38 states have internal predecessors, (8854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:23,189 INFO L175 Difference]: Start difference. First operand has 267 places, 286 transitions, 1026 flow. Second operand 37 states and 5363 transitions. [2022-11-18 20:41:23,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 865 transitions, 4698 flow [2022-11-18 20:41:23,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 865 transitions, 4618 flow, removed 32 selfloop flow, removed 8 redundant places. [2022-11-18 20:41:23,326 INFO L231 Difference]: Finished difference. Result has 317 places, 404 transitions, 2183 flow [2022-11-18 20:41:23,327 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2183, PETRI_PLACES=317, PETRI_TRANSITIONS=404} [2022-11-18 20:41:23,329 INFO L288 CegarLoopForPetriNet]: 210 programPoint places, 107 predicate places. [2022-11-18 20:41:23,329 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 404 transitions, 2183 flow [2022-11-18 20:41:23,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 131.72) internal successors, (3293), 25 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:23,331 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:41:23,331 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:23,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:41:23,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-11-18 20:41:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:23,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1489465874, now seen corresponding path program 2 times [2022-11-18 20:41:23,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:23,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998738156] [2022-11-18 20:41:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:23,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998738156] [2022-11-18 20:41:25,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998738156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:41:25,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:41:25,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-11-18 20:41:25,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22661782] [2022-11-18 20:41:25,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:41:25,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:41:25,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:41:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:41:25,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 233 [2022-11-18 20:41:25,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 404 transitions, 2183 flow. Second operand has 26 states, 26 states have (on average 131.6153846153846) internal successors, (3422), 26 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:25,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:41:25,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 233 [2022-11-18 20:41:25,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:41:42,953 INFO L130 PetriNetUnfolder]: 27406/69290 cut-off events. [2022-11-18 20:41:42,953 INFO L131 PetriNetUnfolder]: For 51832/52018 co-relation queries the response was YES. [2022-11-18 20:41:43,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147640 conditions, 69290 events. 27406/69290 cut-off events. For 51832/52018 co-relation queries the response was YES. Maximal size of possible extension queue 1877. Compared 855863 event pairs, 5524 based on Foata normal form. 335/65367 useless extension candidates. Maximal degree in co-relation 145461. Up to 16888 conditions per place. [2022-11-18 20:41:43,681 INFO L137 encePairwiseOnDemand]: 203/233 looper letters, 492 selfloop transitions, 217 changer transitions 0/832 dead transitions. [2022-11-18 20:41:43,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 832 transitions, 5246 flow [2022-11-18 20:41:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 20:41:43,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-18 20:41:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5036 transitions. [2022-11-18 20:41:43,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6175352544451257 [2022-11-18 20:41:43,700 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5036 transitions. [2022-11-18 20:41:43,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5036 transitions. [2022-11-18 20:41:43,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:41:43,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5036 transitions. [2022-11-18 20:41:43,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 143.88571428571427) internal successors, (5036), 35 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:43,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 233.0) internal successors, (8388), 36 states have internal predecessors, (8388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:43,761 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 233.0) internal successors, (8388), 36 states have internal predecessors, (8388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:43,762 INFO L175 Difference]: Start difference. First operand has 317 places, 404 transitions, 2183 flow. Second operand 35 states and 5036 transitions. [2022-11-18 20:41:43,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 832 transitions, 5246 flow [2022-11-18 20:41:44,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 832 transitions, 5164 flow, removed 29 selfloop flow, removed 9 redundant places. [2022-11-18 20:41:44,752 INFO L231 Difference]: Finished difference. Result has 354 places, 452 transitions, 3102 flow [2022-11-18 20:41:44,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3102, PETRI_PLACES=354, PETRI_TRANSITIONS=452} [2022-11-18 20:41:44,753 INFO L288 CegarLoopForPetriNet]: 210 programPoint places, 144 predicate places. [2022-11-18 20:41:44,754 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 452 transitions, 3102 flow [2022-11-18 20:41:44,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 131.6153846153846) internal successors, (3422), 26 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:44,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:41:44,755 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:44,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:41:44,756 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-11-18 20:41:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1450584894, now seen corresponding path program 3 times [2022-11-18 20:41:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:44,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088454172] [2022-11-18 20:41:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:44,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:47,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:47,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088454172] [2022-11-18 20:41:47,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088454172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:41:47,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:41:47,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-18 20:41:47,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052974989] [2022-11-18 20:41:47,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:41:47,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:41:47,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:47,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:41:47,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:41:47,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 233 [2022-11-18 20:41:47,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 452 transitions, 3102 flow. Second operand has 29 states, 29 states have (on average 126.41379310344827) internal successors, (3666), 29 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:47,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:41:47,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 233 [2022-11-18 20:41:47,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand