./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-6b4ec56 [2022-11-20 11:57:20,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:57:20,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:57:20,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:57:20,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:57:20,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:57:20,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:57:20,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:57:20,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:57:20,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:57:20,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:57:20,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:57:20,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:57:20,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:57:20,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:57:20,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:57:20,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:57:20,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:57:20,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:57:20,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:57:20,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:57:20,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:57:20,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:57:20,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:57:20,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:57:20,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:57:20,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:57:20,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:57:20,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:57:20,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:57:20,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:57:20,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:57:20,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:57:20,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:57:20,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:57:20,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:57:20,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:57:20,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:57:20,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:57:20,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:57:20,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:57:20,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:57:20,640 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:57:20,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:57:20,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:57:20,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:57:20,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:57:20,647 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:57:20,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:57:20,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:57:20,648 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:57:20,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:57:20,650 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:57:20,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:57:20,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:57:20,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:57:20,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:57:20,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:57:20,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:57:20,652 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:57:20,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:57:20,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:57:20,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:57:20,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:57:20,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:57:20,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:57:20,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:57:20,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:57:20,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:57:20,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:57:20,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:57:20,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:57:20,656 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:57:20,656 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:57:20,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:57:20,657 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_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f [2022-11-20 11:57:20,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:57:21,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:57:21,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:57:21,018 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:57:21,019 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:57:21,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-11-20 11:57:24,745 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:57:25,217 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:57:25,218 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-11-20 11:57:25,241 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/data/f73233140/61fb5d3dda43433ab5d2d93846100537/FLAG874fd2912 [2022-11-20 11:57:25,276 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/data/f73233140/61fb5d3dda43433ab5d2d93846100537 [2022-11-20 11:57:25,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:57:25,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:57:25,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:57:25,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:57:25,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:57:25,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:57:25" (1/1) ... [2022-11-20 11:57:25,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60303f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:25, skipping insertion in model container [2022-11-20 11:57:25,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:57:25" (1/1) ... [2022-11-20 11:57:25,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:57:25,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:57:25,573 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-20 11:57:25,944 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-11-20 11:57:25,952 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-11-20 11:57:25,953 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-11-20 11:57:26,069 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-11-20 11:57:26,070 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-11-20 11:57:26,072 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-11-20 11:57:26,073 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-11-20 11:57:26,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:57:26,102 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:57:26,117 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-20 11:57:26,144 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-11-20 11:57:26,146 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-11-20 11:57:26,146 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-11-20 11:57:26,160 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-11-20 11:57:26,161 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-11-20 11:57:26,165 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-11-20 11:57:26,180 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-11-20 11:57:26,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:57:26,259 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:57:26,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26 WrapperNode [2022-11-20 11:57:26,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:57:26,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:57:26,261 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:57:26,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:57:26,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,360 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 203 [2022-11-20 11:57:26,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:57:26,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:57:26,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:57:26,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:57:26,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,400 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:57:26,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:57:26,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:57:26,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:57:26,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (1/1) ... [2022-11-20 11:57:26,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:57:26,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:26,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:57:26,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa86d3e1-958c-4276-b060-bb3e833bcf14/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:57:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-11-20 11:57:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-11-20 11:57:26,528 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-11-20 11:57:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-11-20 11:57:26,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:57:26,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:57:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:57:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:57:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:57:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:57:26,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:57:26,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:57:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:57:26,532 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:57:26,723 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:57:26,725 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:57:27,255 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:57:27,267 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:57:27,267 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 11:57:27,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:57:27 BoogieIcfgContainer [2022-11-20 11:57:27,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:57:27,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:57:27,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:57:27,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:57:27,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:57:25" (1/3) ... [2022-11-20 11:57:27,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477ccf4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:57:27, skipping insertion in model container [2022-11-20 11:57:27,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:26" (2/3) ... [2022-11-20 11:57:27,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477ccf4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:57:27, skipping insertion in model container [2022-11-20 11:57:27,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:57:27" (3/3) ... [2022-11-20 11:57:27,282 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2022-11-20 11:57:27,294 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:57:27,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:57:27,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-20 11:57:27,309 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:57:27,496 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:57:27,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 233 transitions, 482 flow [2022-11-20 11:57:27,728 INFO L130 PetriNetUnfolder]: 17/231 cut-off events. [2022-11-20 11:57:27,729 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:57:27,739 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. [2022-11-20 11:57:27,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 233 transitions, 482 flow [2022-11-20 11:57:27,747 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 220 transitions, 449 flow [2022-11-20 11:57:27,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:57:27,772 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;@192e8caa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:57:27,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-20 11:57:27,881 INFO L130 PetriNetUnfolder]: 11/188 cut-off events. [2022-11-20 11:57:27,881 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:57:27,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:57:27,883 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] [2022-11-20 11:57:27,884 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)] === [2022-11-20 11:57:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash 508547485, now seen corresponding path program 1 times [2022-11-20 11:57:27,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:27,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816501400] [2022-11-20 11:57:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:27,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:30,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:30,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816501400] [2022-11-20 11:57:30,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816501400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:30,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:57:30,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-20 11:57:30,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287336404] [2022-11-20 11:57:30,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:30,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:57:30,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:57:30,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:57:30,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 233 [2022-11-20 11:57:30,711 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) [2022-11-20 11:57:30,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:57:30,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 233 [2022-11-20 11:57:30,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:57:38,836 INFO L130 PetriNetUnfolder]: 6891/21160 cut-off events. [2022-11-20 11:57:38,836 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-11-20 11:57:38,930 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. [2022-11-20 11:57:39,033 INFO L137 encePairwiseOnDemand]: 201/233 looper letters, 182 selfloop transitions, 40 changer transitions 0/350 dead transitions. [2022-11-20 11:57:39,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 350 transitions, 1174 flow [2022-11-20 11:57:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:57:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-20 11:57:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3769 transitions. [2022-11-20 11:57:39,071 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.622152525586002 [2022-11-20 11:57:39,072 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3769 transitions. [2022-11-20 11:57:39,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3769 transitions. [2022-11-20 11:57:39,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:57:39,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3769 transitions. [2022-11-20 11:57:39,111 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) [2022-11-20 11:57:39,131 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) [2022-11-20 11:57:39,137 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) [2022-11-20 11:57:39,139 INFO L175 Difference]: Start difference. First operand has 210 places, 220 transitions, 449 flow. Second operand 26 states and 3769 transitions. [2022-11-20 11:57:39,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 350 transitions, 1174 flow [2022-11-20 11:57:39,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 350 transitions, 1161 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 11:57:39,158 INFO L231 Difference]: Finished difference. Result has 242 places, 241 transitions, 636 flow [2022-11-20 11:57:39,161 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} [2022-11-20 11:57:39,165 INFO L288 CegarLoopForPetriNet]: 210 programPoint places, 32 predicate places. [2022-11-20 11:57:39,165 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 241 transitions, 636 flow [2022-11-20 11:57:39,167 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) [2022-11-20 11:57:39,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:57:39,168 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] [2022-11-20 11:57:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:57:39,169 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)] === [2022-11-20 11:57:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1573639700, now seen corresponding path program 1 times [2022-11-20 11:57:39,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:39,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081183714] [2022-11-20 11:57:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:39,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:41,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:41,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081183714] [2022-11-20 11:57:41,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081183714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:41,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:57:41,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-20 11:57:41,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749722797] [2022-11-20 11:57:41,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:41,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:57:41,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:57:41,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:57:41,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 233 [2022-11-20 11:57:41,485 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) [2022-11-20 11:57:41,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:57:41,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 233 [2022-11-20 11:57:41,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:57:50,663 INFO L130 PetriNetUnfolder]: 8787/26100 cut-off events. [2022-11-20 11:57:50,663 INFO L131 PetriNetUnfolder]: For 2473/2479 co-relation queries the response was YES. [2022-11-20 11:57:50,808 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. [2022-11-20 11:57:50,927 INFO L137 encePairwiseOnDemand]: 209/233 looper letters, 221 selfloop transitions, 67 changer transitions 8/424 dead transitions. [2022-11-20 11:57:50,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 424 transitions, 1675 flow [2022-11-20 11:57:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:57:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 11:57:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3219 transitions. [2022-11-20 11:57:50,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6279750292625829 [2022-11-20 11:57:50,941 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3219 transitions. [2022-11-20 11:57:50,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3219 transitions. [2022-11-20 11:57:50,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:57:50,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3219 transitions. [2022-11-20 11:57:50,956 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) [2022-11-20 11:57:50,969 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) [2022-11-20 11:57:50,972 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) [2022-11-20 11:57:50,973 INFO L175 Difference]: Start difference. First operand has 242 places, 241 transitions, 636 flow. Second operand 22 states and 3219 transitions. [2022-11-20 11:57:50,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 424 transitions, 1675 flow [2022-11-20 11:57:51,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 424 transitions, 1664 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 11:57:51,010 INFO L231 Difference]: Finished difference. Result has 267 places, 286 transitions, 1026 flow [2022-11-20 11:57:51,011 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} [2022-11-20 11:57:51,012 INFO L288 CegarLoopForPetriNet]: 210 programPoint places, 57 predicate places. [2022-11-20 11:57:51,013 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 286 transitions, 1026 flow [2022-11-20 11:57:51,015 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) [2022-11-20 11:57:51,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:57:51,016 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] [2022-11-20 11:57:51,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:57:51,016 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)] === [2022-11-20 11:57:51,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1121263530, now seen corresponding path program 1 times [2022-11-20 11:57:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:51,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830328320] [2022-11-20 11:57:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:51,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:53,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:53,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830328320] [2022-11-20 11:57:53,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830328320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:53,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:57:53,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-20 11:57:53,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054443223] [2022-11-20 11:57:53,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:53,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:57:53,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:57:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:57:53,390 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 233 [2022-11-20 11:57:53,396 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) [2022-11-20 11:57:53,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:57:53,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 233 [2022-11-20 11:57:53,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:58:10,182 INFO L130 PetriNetUnfolder]: 20350/56173 cut-off events. [2022-11-20 11:58:10,182 INFO L131 PetriNetUnfolder]: For 22511/22539 co-relation queries the response was YES. [2022-11-20 11:58:10,527 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. [2022-11-20 11:58:10,766 INFO L137 encePairwiseOnDemand]: 204/233 looper letters, 580 selfloop transitions, 160 changer transitions 2/865 dead transitions. [2022-11-20 11:58:10,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 865 transitions, 4698 flow [2022-11-20 11:58:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 11:58:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-20 11:58:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5363 transitions. [2022-11-20 11:58:10,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.622085604918223 [2022-11-20 11:58:10,785 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5363 transitions. [2022-11-20 11:58:10,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5363 transitions. [2022-11-20 11:58:10,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:58:10,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5363 transitions. [2022-11-20 11:58:10,803 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) [2022-11-20 11:58:10,821 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) [2022-11-20 11:58:10,826 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) [2022-11-20 11:58:10,826 INFO L175 Difference]: Start difference. First operand has 267 places, 286 transitions, 1026 flow. Second operand 37 states and 5363 transitions. [2022-11-20 11:58:10,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 865 transitions, 4698 flow [2022-11-20 11:58:11,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 865 transitions, 4618 flow, removed 32 selfloop flow, removed 8 redundant places. [2022-11-20 11:58:11,144 INFO L231 Difference]: Finished difference. Result has 317 places, 404 transitions, 2183 flow [2022-11-20 11:58:11,145 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} [2022-11-20 11:58:11,148 INFO L288 CegarLoopForPetriNet]: 210 programPoint places, 107 predicate places. [2022-11-20 11:58:11,149 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 404 transitions, 2183 flow [2022-11-20 11:58:11,151 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) [2022-11-20 11:58:11,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:58:11,151 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] [2022-11-20 11:58:11,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:58:11,152 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)] === [2022-11-20 11:58:11,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:58:11,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1489465874, now seen corresponding path program 2 times [2022-11-20 11:58:11,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:58:11,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340249828] [2022-11-20 11:58:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:58:11,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:58:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:13,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:58:13,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340249828] [2022-11-20 11:58:13,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340249828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:58:13,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:58:13,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-11-20 11:58:13,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078725139] [2022-11-20 11:58:13,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:58:13,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:58:13,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:58:13,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:58:13,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:58:13,666 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 233 [2022-11-20 11:58:13,672 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) [2022-11-20 11:58:13,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:58:13,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 233 [2022-11-20 11:58:13,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:58:35,519 INFO L130 PetriNetUnfolder]: 27406/69290 cut-off events. [2022-11-20 11:58:35,522 INFO L131 PetriNetUnfolder]: For 51832/52018 co-relation queries the response was YES. [2022-11-20 11:58:36,237 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. [2022-11-20 11:58:36,925 INFO L137 encePairwiseOnDemand]: 203/233 looper letters, 492 selfloop transitions, 217 changer transitions 0/832 dead transitions. [2022-11-20 11:58:36,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 832 transitions, 5246 flow [2022-11-20 11:58:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:58:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-20 11:58:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5036 transitions. [2022-11-20 11:58:36,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6175352544451257 [2022-11-20 11:58:36,972 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5036 transitions. [2022-11-20 11:58:36,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5036 transitions. [2022-11-20 11:58:36,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:58:36,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5036 transitions. [2022-11-20 11:58:37,002 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) [2022-11-20 11:58:37,023 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) [2022-11-20 11:58:37,037 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) [2022-11-20 11:58:37,037 INFO L175 Difference]: Start difference. First operand has 317 places, 404 transitions, 2183 flow. Second operand 35 states and 5036 transitions. [2022-11-20 11:58:37,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 832 transitions, 5246 flow [2022-11-20 11:58:37,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 832 transitions, 5164 flow, removed 29 selfloop flow, removed 9 redundant places. [2022-11-20 11:58:37,898 INFO L231 Difference]: Finished difference. Result has 354 places, 452 transitions, 3102 flow [2022-11-20 11:58:37,899 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} [2022-11-20 11:58:37,900 INFO L288 CegarLoopForPetriNet]: 210 programPoint places, 144 predicate places. [2022-11-20 11:58:37,901 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 452 transitions, 3102 flow [2022-11-20 11:58:37,903 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) [2022-11-20 11:58:37,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:58:37,904 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] [2022-11-20 11:58:37,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:58:37,904 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)] === [2022-11-20 11:58:37,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:58:37,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1450584894, now seen corresponding path program 3 times [2022-11-20 11:58:37,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:58:37,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363152534] [2022-11-20 11:58:37,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:58:37,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:58:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:40,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:58:41,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363152534] [2022-11-20 11:58:41,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363152534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:58:41,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:58:41,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-20 11:58:41,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321087930] [2022-11-20 11:58:41,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:58:41,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:58:41,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:58:41,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:58:41,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:58:41,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 233 [2022-11-20 11:58:41,010 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) [2022-11-20 11:58:41,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:58:41,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 233 [2022-11-20 11:58:41,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand