./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc --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 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 --- 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-5e519f3 [2022-11-02 20:48:43,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:48:43,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:48:43,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:48:43,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:48:43,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:48:43,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:48:43,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:48:43,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:48:43,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:48:43,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:48:43,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:48:43,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:48:43,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:48:43,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:48:43,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:48:43,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:48:43,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:48:43,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:48:43,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:48:43,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:48:43,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:48:43,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:48:43,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:48:43,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:48:43,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:48:43,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:48:43,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:48:43,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:48:43,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:48:43,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:48:43,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:48:43,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:48:43,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:48:43,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:48:43,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:48:43,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:48:43,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:48:43,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:48:43,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:48:43,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:48:43,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:48:43,773 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:48:43,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:48:43,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:48:43,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:48:43,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:48:43,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:48:43,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:48:43,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:48:43,776 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:48:43,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:48:43,777 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:48:43,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:48:43,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:48:43,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:48:43,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:48:43,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:48:43,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:48:43,778 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:48:43,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:48:43,779 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:48:43,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:48:43,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:48:43,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:48:43,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:48:43,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:48:43,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:48:43,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:48:43,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:48:43,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:48:43,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:48:43,781 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:48:43,781 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:48:43,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:48:43,782 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 [2022-11-02 20:48:44,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:48:44,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:48:44,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:48:44,036 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:48:44,037 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:48:44,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2022-11-02 20:48:44,128 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/data/c9c7f1967/fa3c703f58df4cd69c3ca03471a9e4a9/FLAG80baa4ef4 [2022-11-02 20:48:44,695 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:48:44,700 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2022-11-02 20:48:44,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/data/c9c7f1967/fa3c703f58df4cd69c3ca03471a9e4a9/FLAG80baa4ef4 [2022-11-02 20:48:44,957 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/data/c9c7f1967/fa3c703f58df4cd69c3ca03471a9e4a9 [2022-11-02 20:48:44,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:48:44,961 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:48:44,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:48:44,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:48:44,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:48:44,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:48:44" (1/1) ... [2022-11-02 20:48:44,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c1a8e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:44, skipping insertion in model container [2022-11-02 20:48:44,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:48:44" (1/1) ... [2022-11-02 20:48:44,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:48:45,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:48:45,195 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-02 20:48:45,524 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[39095,39108] [2022-11-02 20:48:45,530 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[39180,39193] [2022-11-02 20:48:45,530 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[39232,39245] [2022-11-02 20:48:45,630 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[49285,49298] [2022-11-02 20:48:45,632 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[49334,49347] [2022-11-02 20:48:45,635 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[49462,49475] [2022-11-02 20:48:45,635 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[49520,49533] [2022-11-02 20:48:45,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:48:45,655 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:48:45,676 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-02 20:48:45,695 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[39095,39108] [2022-11-02 20:48:45,696 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[39180,39193] [2022-11-02 20:48:45,697 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[39232,39245] [2022-11-02 20:48:45,706 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[49285,49298] [2022-11-02 20:48:45,707 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[49334,49347] [2022-11-02 20:48:45,708 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[49462,49475] [2022-11-02 20:48:45,709 WARN L230 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_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[49520,49533] [2022-11-02 20:48:45,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:48:45,786 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:48:45,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45 WrapperNode [2022-11-02 20:48:45,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:48:45,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:48:45,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:48:45,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:48:45,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,889 INFO L138 Inliner]: procedures = 309, calls = 63, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 190 [2022-11-02 20:48:45,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:48:45,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:48:45,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:48:45,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:48:45,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,929 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:48:45,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:48:45,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:48:45,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:48:45,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (1/1) ... [2022-11-02 20:48:45,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:48:45,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:45,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:48:45,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c9bb4f3-af46-4cf4-beb7-1d6deaae5588/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:48:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-11-02 20:48:46,015 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-11-02 20:48:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-11-02 20:48:46,015 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-11-02 20:48:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:48:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:48:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:48:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:48:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:48:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:48:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:48:46,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:48:46,018 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:48:46,161 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:48:46,163 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:48:46,703 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:48:46,712 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:48:46,712 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-02 20:48:46,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:48:46 BoogieIcfgContainer [2022-11-02 20:48:46,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:48:46,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:48:46,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:48:46,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:48:46,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:48:44" (1/3) ... [2022-11-02 20:48:46,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9d93ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:48:46, skipping insertion in model container [2022-11-02 20:48:46,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:45" (2/3) ... [2022-11-02 20:48:46,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9d93ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:48:46, skipping insertion in model container [2022-11-02 20:48:46,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:48:46" (3/3) ... [2022-11-02 20:48:46,731 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-2.i [2022-11-02 20:48:46,740 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:48:46,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:48:46,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-02 20:48:46,751 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:48:46,914 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:48:46,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 220 transitions, 456 flow [2022-11-02 20:48:47,091 INFO L130 PetriNetUnfolder]: 17/218 cut-off events. [2022-11-02 20:48:47,091 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:48:47,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 17/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 439 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2022-11-02 20:48:47,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 220 transitions, 456 flow [2022-11-02 20:48:47,124 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 207 transitions, 423 flow [2022-11-02 20:48:47,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:48:47,155 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;@117f5b67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:48:47,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-02 20:48:47,209 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2022-11-02 20:48:47,209 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:48:47,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:48:47,210 INFO L208 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] [2022-11-02 20:48:47,211 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)] === [2022-11-02 20:48:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:47,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1408739966, now seen corresponding path program 1 times [2022-11-02 20:48:47,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:47,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803858611] [2022-11-02 20:48:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:48:49,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:49,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803858611] [2022-11-02 20:48:49,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803858611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:48:49,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:48:49,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-02 20:48:49,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762928678] [2022-11-02 20:48:49,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:48:49,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:48:49,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:49,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:48:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:48:49,480 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 220 [2022-11-02 20:48:49,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 207 transitions, 423 flow. Second operand has 18 states, 18 states have (on average 130.83333333333334) internal successors, (2355), 18 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:49,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:48:49,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 220 [2022-11-02 20:48:49,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:48:55,960 INFO L130 PetriNetUnfolder]: 6879/19842 cut-off events. [2022-11-02 20:48:55,960 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-11-02 20:48:56,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29408 conditions, 19842 events. 6879/19842 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 210365 event pairs, 3417 based on Foata normal form. 1588/19703 useless extension candidates. Maximal degree in co-relation 29206. Up to 7350 conditions per place. [2022-11-02 20:48:56,113 INFO L137 encePairwiseOnDemand]: 188/220 looper letters, 176 selfloop transitions, 40 changer transitions 0/337 dead transitions. [2022-11-02 20:48:56,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 337 transitions, 1136 flow [2022-11-02 20:48:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:48:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-02 20:48:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3581 transitions. [2022-11-02 20:48:56,144 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6260489510489511 [2022-11-02 20:48:56,145 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3581 transitions. [2022-11-02 20:48:56,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3581 transitions. [2022-11-02 20:48:56,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:48:56,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3581 transitions. [2022-11-02 20:48:56,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 137.73076923076923) internal successors, (3581), 26 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:56,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 220.0) internal successors, (5940), 27 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:56,186 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 220.0) internal successors, (5940), 27 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:56,188 INFO L175 Difference]: Start difference. First operand has 197 places, 207 transitions, 423 flow. Second operand 26 states and 3581 transitions. [2022-11-02 20:48:56,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 337 transitions, 1136 flow [2022-11-02 20:48:56,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 337 transitions, 1123 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-02 20:48:56,202 INFO L231 Difference]: Finished difference. Result has 229 places, 228 transitions, 610 flow [2022-11-02 20:48:56,205 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=610, PETRI_PLACES=229, PETRI_TRANSITIONS=228} [2022-11-02 20:48:56,208 INFO L287 CegarLoopForPetriNet]: 197 programPoint places, 32 predicate places. [2022-11-02 20:48:56,209 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 228 transitions, 610 flow [2022-11-02 20:48:56,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 130.83333333333334) internal successors, (2355), 18 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:56,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:48:56,211 INFO L208 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] [2022-11-02 20:48:56,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:48:56,211 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)] === [2022-11-02 20:48:56,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:56,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1531373137, now seen corresponding path program 1 times [2022-11-02 20:48:56,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:56,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785345176] [2022-11-02 20:48:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:56,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:48:57,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:57,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785345176] [2022-11-02 20:48:57,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785345176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:48:57,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:48:57,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-02 20:48:57,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084106954] [2022-11-02 20:48:57,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:48:57,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:48:57,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:57,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:48:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:48:57,521 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-11-02 20:48:57,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 228 transitions, 610 flow. Second operand has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:57,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:48:57,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-11-02 20:48:57,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:06,478 INFO L130 PetriNetUnfolder]: 11418/30484 cut-off events. [2022-11-02 20:49:06,479 INFO L131 PetriNetUnfolder]: For 3294/3300 co-relation queries the response was YES. [2022-11-02 20:49:06,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50042 conditions, 30484 events. 11418/30484 cut-off events. For 3294/3300 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 347764 event pairs, 2230 based on Foata normal form. 92/28429 useless extension candidates. Maximal degree in co-relation 48956. Up to 7669 conditions per place. [2022-11-02 20:49:06,760 INFO L137 encePairwiseOnDemand]: 194/220 looper letters, 333 selfloop transitions, 100 changer transitions 31/584 dead transitions. [2022-11-02 20:49:06,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 584 transitions, 2392 flow [2022-11-02 20:49:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:49:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-02 20:49:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4636 transitions. [2022-11-02 20:49:06,772 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6385674931129477 [2022-11-02 20:49:06,772 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4636 transitions. [2022-11-02 20:49:06,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4636 transitions. [2022-11-02 20:49:06,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:06,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4636 transitions. [2022-11-02 20:49:06,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 140.4848484848485) internal successors, (4636), 33 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:06,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:06,807 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:06,807 INFO L175 Difference]: Start difference. First operand has 229 places, 228 transitions, 610 flow. Second operand 33 states and 4636 transitions. [2022-11-02 20:49:06,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 584 transitions, 2392 flow [2022-11-02 20:49:06,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 584 transitions, 2381 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-02 20:49:06,866 INFO L231 Difference]: Finished difference. Result has 270 places, 299 transitions, 1209 flow [2022-11-02 20:49:06,866 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1209, PETRI_PLACES=270, PETRI_TRANSITIONS=299} [2022-11-02 20:49:06,867 INFO L287 CegarLoopForPetriNet]: 197 programPoint places, 73 predicate places. [2022-11-02 20:49:06,867 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 299 transitions, 1209 flow [2022-11-02 20:49:06,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:06,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:06,870 INFO L208 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] [2022-11-02 20:49:06,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:49:06,871 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)] === [2022-11-02 20:49:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:06,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2001167401, now seen corresponding path program 2 times [2022-11-02 20:49:06,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:06,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777515965] [2022-11-02 20:49:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:06,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:08,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777515965] [2022-11-02 20:49:08,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777515965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:08,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:08,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-02 20:49:08,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619203850] [2022-11-02 20:49:08,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:08,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:49:08,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:49:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:49:08,059 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-11-02 20:49:08,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 299 transitions, 1209 flow. Second operand has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:08,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:08,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-11-02 20:49:08,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:18,754 INFO L130 PetriNetUnfolder]: 13299/35931 cut-off events. [2022-11-02 20:49:18,754 INFO L131 PetriNetUnfolder]: For 18134/18206 co-relation queries the response was YES. [2022-11-02 20:49:19,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67496 conditions, 35931 events. 13299/35931 cut-off events. For 18134/18206 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 425568 event pairs, 2482 based on Foata normal form. 146/33543 useless extension candidates. Maximal degree in co-relation 66243. Up to 7717 conditions per place. [2022-11-02 20:49:19,167 INFO L137 encePairwiseOnDemand]: 194/220 looper letters, 345 selfloop transitions, 135 changer transitions 15/615 dead transitions. [2022-11-02 20:49:19,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 615 transitions, 3115 flow [2022-11-02 20:49:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:49:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-02 20:49:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4620 transitions. [2022-11-02 20:49:19,182 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2022-11-02 20:49:19,182 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4620 transitions. [2022-11-02 20:49:19,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4620 transitions. [2022-11-02 20:49:19,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:19,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4620 transitions. [2022-11-02 20:49:19,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 140.0) internal successors, (4620), 33 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:19,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:19,216 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:19,217 INFO L175 Difference]: Start difference. First operand has 270 places, 299 transitions, 1209 flow. Second operand 33 states and 4620 transitions. [2022-11-02 20:49:19,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 615 transitions, 3115 flow [2022-11-02 20:49:19,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 615 transitions, 3063 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-11-02 20:49:19,402 INFO L231 Difference]: Finished difference. Result has 303 places, 337 transitions, 1872 flow [2022-11-02 20:49:19,402 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1872, PETRI_PLACES=303, PETRI_TRANSITIONS=337} [2022-11-02 20:49:19,405 INFO L287 CegarLoopForPetriNet]: 197 programPoint places, 106 predicate places. [2022-11-02 20:49:19,405 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 337 transitions, 1872 flow [2022-11-02 20:49:19,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:19,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:19,407 INFO L208 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] [2022-11-02 20:49:19,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:49:19,408 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)] === [2022-11-02 20:49:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash -328926151, now seen corresponding path program 3 times [2022-11-02 20:49:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:19,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388285152] [2022-11-02 20:49:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:19,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:20,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388285152] [2022-11-02 20:49:20,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388285152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:20,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:20,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-02 20:49:20,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847878195] [2022-11-02 20:49:20,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:20,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:49:20,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:49:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:49:20,699 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-11-02 20:49:20,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 337 transitions, 1872 flow. Second operand has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:20,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:20,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-11-02 20:49:20,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:30,960 INFO L130 PetriNetUnfolder]: 14235/39227 cut-off events. [2022-11-02 20:49:30,961 INFO L131 PetriNetUnfolder]: For 40129/40251 co-relation queries the response was YES. [2022-11-02 20:49:31,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79578 conditions, 39227 events. 14235/39227 cut-off events. For 40129/40251 co-relation queries the response was YES. Maximal size of possible extension queue 1171. Compared 472941 event pairs, 2046 based on Foata normal form. 182/36764 useless extension candidates. Maximal degree in co-relation 78337. Up to 7455 conditions per place. [2022-11-02 20:49:31,614 INFO L137 encePairwiseOnDemand]: 196/220 looper letters, 286 selfloop transitions, 157 changer transitions 8/571 dead transitions. [2022-11-02 20:49:31,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 571 transitions, 3522 flow [2022-11-02 20:49:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:49:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-02 20:49:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3766 transitions. [2022-11-02 20:49:31,627 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.634006734006734 [2022-11-02 20:49:31,628 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3766 transitions. [2022-11-02 20:49:31,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3766 transitions. [2022-11-02 20:49:31,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:31,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3766 transitions. [2022-11-02 20:49:31,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 139.4814814814815) internal successors, (3766), 27 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:31,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 220.0) internal successors, (6160), 28 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:31,679 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 220.0) internal successors, (6160), 28 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:31,680 INFO L175 Difference]: Start difference. First operand has 303 places, 337 transitions, 1872 flow. Second operand 27 states and 3766 transitions. [2022-11-02 20:49:31,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 571 transitions, 3522 flow [2022-11-02 20:49:32,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 571 transitions, 3414 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-11-02 20:49:32,018 INFO L231 Difference]: Finished difference. Result has 321 places, 366 transitions, 2527 flow [2022-11-02 20:49:32,019 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2527, PETRI_PLACES=321, PETRI_TRANSITIONS=366} [2022-11-02 20:49:32,020 INFO L287 CegarLoopForPetriNet]: 197 programPoint places, 124 predicate places. [2022-11-02 20:49:32,020 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 366 transitions, 2527 flow [2022-11-02 20:49:32,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:32,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:32,022 INFO L208 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] [2022-11-02 20:49:32,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:49:32,022 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)] === [2022-11-02 20:49:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:32,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1085107557, now seen corresponding path program 1 times [2022-11-02 20:49:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:32,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550954939] [2022-11-02 20:49:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:32,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:35,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:35,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550954939] [2022-11-02 20:49:35,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550954939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:35,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:35,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-11-02 20:49:35,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819022431] [2022-11-02 20:49:35,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:35,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:49:35,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:35,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:49:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:49:35,444 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 220 [2022-11-02 20:49:35,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 366 transitions, 2527 flow. Second operand has 30 states, 30 states have (on average 113.23333333333333) internal successors, (3397), 30 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:35,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 220 [2022-11-02 20:49:35,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:14,999 INFO L130 PetriNetUnfolder]: 62277/132576 cut-off events. [2022-11-02 20:50:15,000 INFO L131 PetriNetUnfolder]: For 304397/304429 co-relation queries the response was YES. [2022-11-02 20:50:16,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334392 conditions, 132576 events. 62277/132576 cut-off events. For 304397/304429 co-relation queries the response was YES. Maximal size of possible extension queue 3765. Compared 1618582 event pairs, 8065 based on Foata normal form. 209/125461 useless extension candidates. Maximal degree in co-relation 331014. Up to 44361 conditions per place. [2022-11-02 20:50:17,042 INFO L137 encePairwiseOnDemand]: 182/220 looper letters, 1118 selfloop transitions, 498 changer transitions 3/1723 dead transitions. [2022-11-02 20:50:17,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1723 transitions, 16232 flow [2022-11-02 20:50:17,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-02 20:50:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-02 20:50:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6282 transitions. [2022-11-02 20:50:17,057 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5827458256029685 [2022-11-02 20:50:17,058 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6282 transitions. [2022-11-02 20:50:17,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6282 transitions. [2022-11-02 20:50:17,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:17,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6282 transitions. [2022-11-02 20:50:17,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 128.20408163265307) internal successors, (6282), 49 states have internal predecessors, (6282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 220.0) internal successors, (11000), 50 states have internal predecessors, (11000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,097 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 220.0) internal successors, (11000), 50 states have internal predecessors, (11000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,097 INFO L175 Difference]: Start difference. First operand has 321 places, 366 transitions, 2527 flow. Second operand 49 states and 6282 transitions. [2022-11-02 20:50:17,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1723 transitions, 16232 flow