./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF --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 2468c605d5c29b15a54525a5c6944fa0a2b4d36426cacd5fefa10555cb2b8a7a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:07:42,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:07:42,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:07:42,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:07:42,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:07:42,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:07:42,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:07:42,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:07:42,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:07:42,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:07:42,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:07:42,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:07:42,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:07:42,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:07:42,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:07:42,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:07:42,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:07:42,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:07:42,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:07:42,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:07:42,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:07:42,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:07:42,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:07:42,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:07:42,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:07:42,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:07:42,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:07:42,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:07:42,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:07:42,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:07:42,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:07:42,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:07:42,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:07:42,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:07:42,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:07:42,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:07:42,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:07:42,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:07:42,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:07:42,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:07:42,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:07:42,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:07:42,688 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:07:42,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:07:42,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:07:42,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:07:42,693 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:07:42,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:07:42,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:07:42,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:07:42,695 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:07:42,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:07:42,697 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:07:42,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:07:42,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:07:42,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:07:42,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:07:42,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:07:42,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:07:42,699 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:07:42,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:07:42,700 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:07:42,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:07:42,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:07:42,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:07:42,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:07:42,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:07:42,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:07:42,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:07:42,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:07:42,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:07:42,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:07:42,705 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:07:42,706 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:07:42,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:07:42,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:07:42,707 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_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2468c605d5c29b15a54525a5c6944fa0a2b4d36426cacd5fefa10555cb2b8a7a [2021-11-20 07:07:43,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:07:43,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:07:43,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:07:43,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:07:43,124 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:07:43,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2021-11-20 07:07:43,217 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/data/fe9c6cfda/4e8d1897d45643b78bcc68b4145ba327/FLAG9162c146d [2021-11-20 07:07:43,879 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:07:43,884 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2021-11-20 07:07:43,923 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/data/fe9c6cfda/4e8d1897d45643b78bcc68b4145ba327/FLAG9162c146d [2021-11-20 07:07:44,181 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/data/fe9c6cfda/4e8d1897d45643b78bcc68b4145ba327 [2021-11-20 07:07:44,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:07:44,189 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:07:44,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:07:44,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:07:44,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:07:44,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:44,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14dc1d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44, skipping insertion in model container [2021-11-20 07:07:44,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:44,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:07:44,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:07:44,469 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_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[913,926] [2021-11-20 07:07:44,582 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_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[5977,5990] [2021-11-20 07:07:44,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:07:44,716 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:07:44,749 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_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[913,926] [2021-11-20 07:07:44,777 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_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[5977,5990] [2021-11-20 07:07:44,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:07:44,861 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:07:44,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44 WrapperNode [2021-11-20 07:07:44,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:07:44,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:07:44,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:07:44,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:07:44,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:44,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:44,978 INFO L137 Inliner]: procedures = 58, calls = 64, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 654 [2021-11-20 07:07:45,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:07:45,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:07:45,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:07:45,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:07:45,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:45,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:45,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:45,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:45,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:45,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:45,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:45,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:07:45,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:07:45,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:07:45,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:07:45,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (1/1) ... [2021-11-20 07:07:45,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:07:45,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:45,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:07:45,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:07:45,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:07:45,209 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-20 07:07:45,210 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-20 07:07:45,210 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-11-20 07:07:45,212 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-11-20 07:07:45,212 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-20 07:07:45,212 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-20 07:07:45,212 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-20 07:07:45,212 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-20 07:07:45,213 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-20 07:07:45,213 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-20 07:07:45,213 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-20 07:07:45,213 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-20 07:07:45,213 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-20 07:07:45,213 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-20 07:07:45,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:07:45,214 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-20 07:07:45,214 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-20 07:07:45,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:07:45,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:07:45,214 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-20 07:07:45,215 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-20 07:07:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-11-20 07:07:45,216 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-11-20 07:07:45,427 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:07:45,429 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:07:46,235 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:07:46,262 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:07:46,265 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-20 07:07:46,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:07:46 BoogieIcfgContainer [2021-11-20 07:07:46,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:07:46,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:07:46,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:07:46,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:07:46,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:07:44" (1/3) ... [2021-11-20 07:07:46,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d79973b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:07:46, skipping insertion in model container [2021-11-20 07:07:46,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:44" (2/3) ... [2021-11-20 07:07:46,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d79973b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:07:46, skipping insertion in model container [2021-11-20 07:07:46,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:07:46" (3/3) ... [2021-11-20 07:07:46,285 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2021-11-20 07:07:46,297 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:07:46,297 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 07:07:46,376 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:07:46,392 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:07:46,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 07:07:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 247 states have (on average 1.6153846153846154) internal successors, (399), 254 states have internal predecessors, (399), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 07:07:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:07:46,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:46,459 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:07:46,460 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash -335189264, now seen corresponding path program 1 times [2021-11-20 07:07:46,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:46,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214339803] [2021-11-20 07:07:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:46,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:46,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:07:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:46,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:07:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:46,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:46,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214339803] [2021-11-20 07:07:46,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214339803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:46,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:46,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:07:46,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933638906] [2021-11-20 07:07:46,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:46,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:07:46,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:07:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:07:47,048 INFO L87 Difference]: Start difference. First operand has 287 states, 247 states have (on average 1.6153846153846154) internal successors, (399), 254 states have internal predecessors, (399), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:07:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:47,586 INFO L93 Difference]: Finished difference Result 625 states and 988 transitions. [2021-11-20 07:07:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:07:47,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-11-20 07:07:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:47,615 INFO L225 Difference]: With dead ends: 625 [2021-11-20 07:07:47,616 INFO L226 Difference]: Without dead ends: 346 [2021-11-20 07:07:47,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:07:47,628 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 537 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:47,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 728 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:07:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-20 07:07:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 340. [2021-11-20 07:07:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 296 states have (on average 1.4864864864864864) internal successors, (440), 301 states have internal predecessors, (440), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2021-11-20 07:07:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 504 transitions. [2021-11-20 07:07:47,750 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 504 transitions. Word has length 44 [2021-11-20 07:07:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:47,752 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 504 transitions. [2021-11-20 07:07:47,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:07:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 504 transitions. [2021-11-20 07:07:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:07:47,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:47,769 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:07:47,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:07:47,770 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1892579596, now seen corresponding path program 1 times [2021-11-20 07:07:47,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:47,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487193469] [2021-11-20 07:07:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:47,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:07:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 07:07:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:47,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:47,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487193469] [2021-11-20 07:07:47,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487193469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:47,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:47,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:07:47,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099254338] [2021-11-20 07:07:47,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:47,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:07:47,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:07:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:07:47,941 INFO L87 Difference]: Start difference. First operand 340 states and 504 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:07:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:48,464 INFO L93 Difference]: Finished difference Result 588 states and 844 transitions. [2021-11-20 07:07:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:07:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 07:07:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:48,476 INFO L225 Difference]: With dead ends: 588 [2021-11-20 07:07:48,479 INFO L226 Difference]: Without dead ends: 464 [2021-11-20 07:07:48,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:07:48,486 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 229 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:48,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 941 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:07:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-20 07:07:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 407. [2021-11-20 07:07:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 357 states have (on average 1.4677871148459383) internal successors, (524), 362 states have internal predecessors, (524), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-20 07:07:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 594 transitions. [2021-11-20 07:07:48,584 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 594 transitions. Word has length 45 [2021-11-20 07:07:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:48,585 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 594 transitions. [2021-11-20 07:07:48,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:07:48,585 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 594 transitions. [2021-11-20 07:07:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:07:48,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:48,589 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:07:48,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:07:48,589 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:48,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:48,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1118030239, now seen corresponding path program 1 times [2021-11-20 07:07:48,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:48,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207703157] [2021-11-20 07:07:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:48,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:07:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 07:07:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:48,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:48,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207703157] [2021-11-20 07:07:48,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207703157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:48,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:48,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:07:48,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886625188] [2021-11-20 07:07:48,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:48,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:07:48,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:48,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:07:48,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:07:48,699 INFO L87 Difference]: Start difference. First operand 407 states and 594 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:07:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:48,979 INFO L93 Difference]: Finished difference Result 815 states and 1153 transitions. [2021-11-20 07:07:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:07:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 07:07:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:48,989 INFO L225 Difference]: With dead ends: 815 [2021-11-20 07:07:48,989 INFO L226 Difference]: Without dead ends: 624 [2021-11-20 07:07:48,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:07:49,003 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 546 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:49,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 725 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:07:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-20 07:07:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 572. [2021-11-20 07:07:49,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 503 states have (on average 1.41948310139165) internal successors, (714), 511 states have internal predecessors, (714), 45 states have call successors, (45), 22 states have call predecessors, (45), 22 states have return successors, (53), 39 states have call predecessors, (53), 41 states have call successors, (53) [2021-11-20 07:07:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 812 transitions. [2021-11-20 07:07:49,101 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 812 transitions. Word has length 45 [2021-11-20 07:07:49,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:49,102 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 812 transitions. [2021-11-20 07:07:49,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:07:49,105 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 812 transitions. [2021-11-20 07:07:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:07:49,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:49,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:49,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:07:49,113 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:49,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1874322656, now seen corresponding path program 1 times [2021-11-20 07:07:49,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:49,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465932915] [2021-11-20 07:07:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:49,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:07:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:07:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:07:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:07:49,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:49,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465932915] [2021-11-20 07:07:49,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465932915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:49,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:49,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:07:49,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693573391] [2021-11-20 07:07:49,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:49,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:07:49,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:07:49,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:07:49,261 INFO L87 Difference]: Start difference. First operand 572 states and 812 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:07:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:49,667 INFO L93 Difference]: Finished difference Result 1156 states and 1597 transitions. [2021-11-20 07:07:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:07:49,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-11-20 07:07:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:49,676 INFO L225 Difference]: With dead ends: 1156 [2021-11-20 07:07:49,676 INFO L226 Difference]: Without dead ends: 800 [2021-11-20 07:07:49,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:07:49,680 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 213 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:49,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 975 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:07:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-11-20 07:07:49,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 762. [2021-11-20 07:07:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 669 states have (on average 1.3662182361733932) internal successors, (914), 679 states have internal predecessors, (914), 59 states have call successors, (59), 30 states have call predecessors, (59), 32 states have return successors, (77), 53 states have call predecessors, (77), 55 states have call successors, (77) [2021-11-20 07:07:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1050 transitions. [2021-11-20 07:07:49,773 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1050 transitions. Word has length 62 [2021-11-20 07:07:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:49,773 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1050 transitions. [2021-11-20 07:07:49,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:07:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1050 transitions. [2021-11-20 07:07:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:07:49,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:49,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:49,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:07:49,778 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:49,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1000568822, now seen corresponding path program 1 times [2021-11-20 07:07:49,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:49,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338359556] [2021-11-20 07:07:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:49,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:07:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:07:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 07:07:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:07:49,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:49,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338359556] [2021-11-20 07:07:49,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338359556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:49,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:49,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:07:49,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881317575] [2021-11-20 07:07:49,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:49,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:07:49,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:49,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:07:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:07:49,884 INFO L87 Difference]: Start difference. First operand 762 states and 1050 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:07:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:50,157 INFO L93 Difference]: Finished difference Result 1415 states and 1903 transitions. [2021-11-20 07:07:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:07:50,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-11-20 07:07:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:50,168 INFO L225 Difference]: With dead ends: 1415 [2021-11-20 07:07:50,168 INFO L226 Difference]: Without dead ends: 961 [2021-11-20 07:07:50,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:07:50,172 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 533 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:50,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 722 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:07:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2021-11-20 07:07:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 906. [2021-11-20 07:07:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 797 states have (on average 1.3362609786700126) internal successors, (1065), 809 states have internal predecessors, (1065), 67 states have call successors, (67), 36 states have call predecessors, (67), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2021-11-20 07:07:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1223 transitions. [2021-11-20 07:07:50,264 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1223 transitions. Word has length 67 [2021-11-20 07:07:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:50,267 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 1223 transitions. [2021-11-20 07:07:50,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:07:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1223 transitions. [2021-11-20 07:07:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:07:50,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:50,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:50,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:07:50,274 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2083316816, now seen corresponding path program 1 times [2021-11-20 07:07:50,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:50,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851041541] [2021-11-20 07:07:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:50,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:07:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:50,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:07:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:50,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:07:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:07:50,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851041541] [2021-11-20 07:07:50,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851041541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775220821] [2021-11-20 07:07:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:50,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:50,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:50,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:07:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:50,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:07:50,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:51,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:07:51,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775220821] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:51,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:07:51,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-11-20 07:07:51,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895595417] [2021-11-20 07:07:51,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:51,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:07:51,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:07:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:07:51,216 INFO L87 Difference]: Start difference. First operand 906 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:07:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:51,435 INFO L93 Difference]: Finished difference Result 962 states and 1291 transitions. [2021-11-20 07:07:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:07:51,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-11-20 07:07:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:51,446 INFO L225 Difference]: With dead ends: 962 [2021-11-20 07:07:51,446 INFO L226 Difference]: Without dead ends: 959 [2021-11-20 07:07:51,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:07:51,458 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 733 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:51,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 505 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:07:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-20 07:07:51,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 905. [2021-11-20 07:07:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 797 states have (on average 1.3337515683814303) internal successors, (1063), 808 states have internal predecessors, (1063), 66 states have call successors, (66), 36 states have call predecessors, (66), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2021-11-20 07:07:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1220 transitions. [2021-11-20 07:07:51,549 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1220 transitions. Word has length 68 [2021-11-20 07:07:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:51,550 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1220 transitions. [2021-11-20 07:07:51,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:07:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1220 transitions. [2021-11-20 07:07:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 07:07:51,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:51,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:51,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:51,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:51,772 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash -159219143, now seen corresponding path program 1 times [2021-11-20 07:07:51,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:51,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498971712] [2021-11-20 07:07:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:51,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:51,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:07:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:51,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:07:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:51,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:07:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:07:51,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:51,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498971712] [2021-11-20 07:07:51,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498971712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:51,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765259433] [2021-11-20 07:07:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:51,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:51,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:51,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:51,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:07:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:07:52,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:52,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:07:52,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765259433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:07:52,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:07:52,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-11-20 07:07:52,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752400648] [2021-11-20 07:07:52,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:52,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:07:52,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:07:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:07:52,777 INFO L87 Difference]: Start difference. First operand 905 states and 1220 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-20 07:07:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:54,748 INFO L93 Difference]: Finished difference Result 2605 states and 3440 transitions. [2021-11-20 07:07:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 07:07:54,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-11-20 07:07:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:54,768 INFO L225 Difference]: With dead ends: 2605 [2021-11-20 07:07:54,769 INFO L226 Difference]: Without dead ends: 2061 [2021-11-20 07:07:54,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 07:07:54,776 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 890 mSDsluCounter, 2596 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:54,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 3139 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:07:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-11-20 07:07:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1294. [2021-11-20 07:07:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1147 states have (on average 1.3051438535309503) internal successors, (1497), 1166 states have internal predecessors, (1497), 86 states have call successors, (86), 50 states have call predecessors, (86), 59 states have return successors, (125), 78 states have call predecessors, (125), 83 states have call successors, (125) [2021-11-20 07:07:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1708 transitions. [2021-11-20 07:07:54,939 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1708 transitions. Word has length 69 [2021-11-20 07:07:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:54,939 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 1708 transitions. [2021-11-20 07:07:54,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-20 07:07:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1708 transitions. [2021-11-20 07:07:54,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 07:07:54,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:54,947 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:54,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:55,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:55,164 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1275467893, now seen corresponding path program 1 times [2021-11-20 07:07:55,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:55,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902613931] [2021-11-20 07:07:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:55,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:55,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:07:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:55,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:07:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:55,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:07:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:55,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 07:07:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 07:07:55,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:55,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902613931] [2021-11-20 07:07:55,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902613931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:55,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614236244] [2021-11-20 07:07:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:55,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:55,278 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:55,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:07:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:55,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:07:55,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:07:55,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:55,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614236244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:55,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:55,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 07:07:55,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965406086] [2021-11-20 07:07:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:55,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:07:55,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:07:55,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:07:55,615 INFO L87 Difference]: Start difference. First operand 1294 states and 1708 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:07:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:55,747 INFO L93 Difference]: Finished difference Result 2017 states and 2646 transitions. [2021-11-20 07:07:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:07:55,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-11-20 07:07:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:55,760 INFO L225 Difference]: With dead ends: 2017 [2021-11-20 07:07:55,761 INFO L226 Difference]: Without dead ends: 1172 [2021-11-20 07:07:55,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:07:55,765 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 373 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:55,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 519 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:07:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-11-20 07:07:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1157. [2021-11-20 07:07:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1026 states have (on average 1.3050682261208577) internal successors, (1339), 1044 states have internal predecessors, (1339), 78 states have call successors, (78), 44 states have call predecessors, (78), 51 states have return successors, (111), 69 states have call predecessors, (111), 75 states have call successors, (111) [2021-11-20 07:07:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1528 transitions. [2021-11-20 07:07:55,887 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1528 transitions. Word has length 88 [2021-11-20 07:07:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:55,888 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 1528 transitions. [2021-11-20 07:07:55,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:07:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1528 transitions. [2021-11-20 07:07:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:07:55,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:55,895 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:07:55,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:56,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:56,120 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:56,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:56,120 INFO L85 PathProgramCache]: Analyzing trace with hash -118977572, now seen corresponding path program 1 times [2021-11-20 07:07:56,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:56,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957385478] [2021-11-20 07:07:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:56,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:56,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:07:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:56,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:07:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:56,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:07:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:56,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:07:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:56,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:07:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:56,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:56,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957385478] [2021-11-20 07:07:56,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957385478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:56,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:56,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:07:56,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837950663] [2021-11-20 07:07:56,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:56,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:07:56,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:56,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:07:56,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:07:56,314 INFO L87 Difference]: Start difference. First operand 1157 states and 1528 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:07:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:57,630 INFO L93 Difference]: Finished difference Result 1430 states and 1964 transitions. [2021-11-20 07:07:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:07:57,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:07:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:57,641 INFO L225 Difference]: With dead ends: 1430 [2021-11-20 07:07:57,641 INFO L226 Difference]: Without dead ends: 1234 [2021-11-20 07:07:57,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:07:57,647 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 815 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:57,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 987 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:07:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-11-20 07:07:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1157. [2021-11-20 07:07:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1026 states have (on average 1.304093567251462) internal successors, (1338), 1044 states have internal predecessors, (1338), 78 states have call successors, (78), 44 states have call predecessors, (78), 51 states have return successors, (111), 69 states have call predecessors, (111), 75 states have call successors, (111) [2021-11-20 07:07:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1527 transitions. [2021-11-20 07:07:57,783 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1527 transitions. Word has length 102 [2021-11-20 07:07:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:57,784 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 1527 transitions. [2021-11-20 07:07:57,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:07:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1527 transitions. [2021-11-20 07:07:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:07:57,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:57,791 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:07:57,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:07:57,791 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:57,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1757505246, now seen corresponding path program 1 times [2021-11-20 07:07:57,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:57,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590931303] [2021-11-20 07:07:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:57,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:57,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:07:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:57,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:07:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:57,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:07:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:57,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:07:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:57,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:07:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:57,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:57,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590931303] [2021-11-20 07:07:57,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590931303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:57,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:57,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:07:57,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013072691] [2021-11-20 07:07:57,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:57,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:07:57,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:07:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:07:57,959 INFO L87 Difference]: Start difference. First operand 1157 states and 1527 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:00,363 INFO L93 Difference]: Finished difference Result 1692 states and 2376 transitions. [2021-11-20 07:08:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:08:00,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:08:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:00,375 INFO L225 Difference]: With dead ends: 1692 [2021-11-20 07:08:00,375 INFO L226 Difference]: Without dead ends: 1496 [2021-11-20 07:08:00,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:08:00,378 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 861 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:00,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 1955 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:08:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-11-20 07:08:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1359. [2021-11-20 07:08:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1204 states have (on average 1.3421926910299002) internal successors, (1616), 1224 states have internal predecessors, (1616), 94 states have call successors, (94), 50 states have call predecessors, (94), 59 states have return successors, (134), 86 states have call predecessors, (134), 91 states have call successors, (134) [2021-11-20 07:08:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1844 transitions. [2021-11-20 07:08:00,502 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1844 transitions. Word has length 102 [2021-11-20 07:08:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:00,504 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 1844 transitions. [2021-11-20 07:08:00,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1844 transitions. [2021-11-20 07:08:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:08:00,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:00,509 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:08:00,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:08:00,510 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:00,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:00,510 INFO L85 PathProgramCache]: Analyzing trace with hash -121625700, now seen corresponding path program 1 times [2021-11-20 07:08:00,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:00,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814488543] [2021-11-20 07:08:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:00,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:00,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:08:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:00,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:08:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:00,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:08:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:00,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:08:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:00,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:08:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:00,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:00,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814488543] [2021-11-20 07:08:00,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814488543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:00,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:00,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:08:00,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973238994] [2021-11-20 07:08:00,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:00,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:08:00,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:00,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:08:00,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:08:00,637 INFO L87 Difference]: Start difference. First operand 1359 states and 1844 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:01,837 INFO L93 Difference]: Finished difference Result 1887 states and 2687 transitions. [2021-11-20 07:08:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:08:01,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:08:01,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:01,849 INFO L225 Difference]: With dead ends: 1887 [2021-11-20 07:08:01,849 INFO L226 Difference]: Without dead ends: 1489 [2021-11-20 07:08:01,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:08:01,853 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 701 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:01,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 1146 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:08:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-11-20 07:08:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1359. [2021-11-20 07:08:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1204 states have (on average 1.339700996677741) internal successors, (1613), 1224 states have internal predecessors, (1613), 94 states have call successors, (94), 50 states have call predecessors, (94), 59 states have return successors, (134), 86 states have call predecessors, (134), 91 states have call successors, (134) [2021-11-20 07:08:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1841 transitions. [2021-11-20 07:08:02,038 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1841 transitions. Word has length 102 [2021-11-20 07:08:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:02,038 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 1841 transitions. [2021-11-20 07:08:02,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:02,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1841 transitions. [2021-11-20 07:08:02,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:08:02,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:02,044 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:08:02,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:08:02,045 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:02,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:02,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1203230494, now seen corresponding path program 1 times [2021-11-20 07:08:02,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:02,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107838999] [2021-11-20 07:08:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:02,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:08:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:08:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:08:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:08:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:08:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:02,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107838999] [2021-11-20 07:08:02,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107838999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:02,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:02,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:08:02,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519125180] [2021-11-20 07:08:02,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:02,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:08:02,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:02,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:08:02,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:08:02,185 INFO L87 Difference]: Start difference. First operand 1359 states and 1841 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:04,287 INFO L93 Difference]: Finished difference Result 2367 states and 3419 transitions. [2021-11-20 07:08:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:08:04,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:08:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:04,303 INFO L225 Difference]: With dead ends: 2367 [2021-11-20 07:08:04,303 INFO L226 Difference]: Without dead ends: 1971 [2021-11-20 07:08:04,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:08:04,307 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 861 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 1852 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:04,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 1852 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:08:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-11-20 07:08:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1733. [2021-11-20 07:08:04,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1536 states have (on average 1.380859375) internal successors, (2121), 1558 states have internal predecessors, (2121), 122 states have call successors, (122), 62 states have call predecessors, (122), 73 states have return successors, (172), 116 states have call predecessors, (172), 119 states have call successors, (172) [2021-11-20 07:08:04,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2415 transitions. [2021-11-20 07:08:04,527 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2415 transitions. Word has length 102 [2021-11-20 07:08:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:04,528 INFO L470 AbstractCegarLoop]: Abstraction has 1733 states and 2415 transitions. [2021-11-20 07:08:04,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2415 transitions. [2021-11-20 07:08:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:08:04,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:04,535 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:08:04,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:08:04,535 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:04,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1524978852, now seen corresponding path program 1 times [2021-11-20 07:08:04,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:04,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074446766] [2021-11-20 07:08:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:04,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:04,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:08:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:04,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:08:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:04,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:08:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:04,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:08:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:04,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:08:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:04,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:04,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074446766] [2021-11-20 07:08:04,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074446766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:04,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:04,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:08:04,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817724353] [2021-11-20 07:08:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:04,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:08:04,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:08:04,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:08:04,671 INFO L87 Difference]: Start difference. First operand 1733 states and 2415 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:07,085 INFO L93 Difference]: Finished difference Result 3693 states and 5479 transitions. [2021-11-20 07:08:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:08:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:08:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:07,112 INFO L225 Difference]: With dead ends: 3693 [2021-11-20 07:08:07,112 INFO L226 Difference]: Without dead ends: 2923 [2021-11-20 07:08:07,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:08:07,119 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 861 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:07,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 1849 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:08:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-11-20 07:08:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2484. [2021-11-20 07:08:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2203 states have (on average 1.4257830231502497) internal successors, (3141), 2229 states have internal predecessors, (3141), 178 states have call successors, (178), 86 states have call predecessors, (178), 101 states have return successors, (254), 176 states have call predecessors, (254), 175 states have call successors, (254) [2021-11-20 07:08:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 3573 transitions. [2021-11-20 07:08:07,423 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 3573 transitions. Word has length 102 [2021-11-20 07:08:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:07,424 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 3573 transitions. [2021-11-20 07:08:07,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 3573 transitions. [2021-11-20 07:08:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:08:07,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:07,431 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:08:07,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:08:07,432 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:07,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1712150366, now seen corresponding path program 1 times [2021-11-20 07:08:07,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:07,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121019835] [2021-11-20 07:08:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:07,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:07,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:08:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:07,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:08:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:07,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:08:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:07,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:08:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:07,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:08:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:07,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:07,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121019835] [2021-11-20 07:08:07,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121019835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:07,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:07,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:08:07,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447775030] [2021-11-20 07:08:07,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:07,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:08:07,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:07,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:08:07,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:08:07,587 INFO L87 Difference]: Start difference. First operand 2484 states and 3573 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:10,157 INFO L93 Difference]: Finished difference Result 6976 states and 10561 transitions. [2021-11-20 07:08:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:08:10,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:08:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:10,212 INFO L225 Difference]: With dead ends: 6976 [2021-11-20 07:08:10,212 INFO L226 Difference]: Without dead ends: 5455 [2021-11-20 07:08:10,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:08:10,222 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 1076 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:10,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1098 Valid, 1840 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:08:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5455 states. [2021-11-20 07:08:10,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5455 to 3969. [2021-11-20 07:08:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3969 states, 3528 states have (on average 1.4668367346938775) internal successors, (5175), 3562 states have internal predecessors, (5175), 282 states have call successors, (282), 134 states have call predecessors, (282), 157 states have return successors, (428), 288 states have call predecessors, (428), 279 states have call successors, (428) [2021-11-20 07:08:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 5885 transitions. [2021-11-20 07:08:10,763 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 5885 transitions. Word has length 102 [2021-11-20 07:08:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:10,764 INFO L470 AbstractCegarLoop]: Abstraction has 3969 states and 5885 transitions. [2021-11-20 07:08:10,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 5885 transitions. [2021-11-20 07:08:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:08:10,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:10,774 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:08:10,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:08:10,774 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:10,775 INFO L85 PathProgramCache]: Analyzing trace with hash 569647900, now seen corresponding path program 1 times [2021-11-20 07:08:10,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:10,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761352417] [2021-11-20 07:08:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:10,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:10,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:08:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:10,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:08:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:10,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:08:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:08:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:10,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:08:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:10,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:10,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761352417] [2021-11-20 07:08:10,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761352417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:10,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:10,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:08:10,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938236066] [2021-11-20 07:08:10,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:10,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:08:10,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:10,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:08:10,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:08:10,931 INFO L87 Difference]: Start difference. First operand 3969 states and 5885 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:12,338 INFO L93 Difference]: Finished difference Result 7831 states and 12006 transitions. [2021-11-20 07:08:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:08:12,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:08:12,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:12,394 INFO L225 Difference]: With dead ends: 7831 [2021-11-20 07:08:12,394 INFO L226 Difference]: Without dead ends: 4823 [2021-11-20 07:08:12,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:08:12,410 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 702 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:12,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 1127 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:08:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2021-11-20 07:08:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 3969. [2021-11-20 07:08:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3969 states, 3528 states have (on average 1.4620181405895691) internal successors, (5158), 3562 states have internal predecessors, (5158), 282 states have call successors, (282), 134 states have call predecessors, (282), 157 states have return successors, (428), 288 states have call predecessors, (428), 279 states have call successors, (428) [2021-11-20 07:08:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 5868 transitions. [2021-11-20 07:08:12,905 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 5868 transitions. Word has length 102 [2021-11-20 07:08:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:12,906 INFO L470 AbstractCegarLoop]: Abstraction has 3969 states and 5868 transitions. [2021-11-20 07:08:12,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 5868 transitions. [2021-11-20 07:08:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:08:12,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:12,916 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:08:12,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:08:12,916 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:12,917 INFO L85 PathProgramCache]: Analyzing trace with hash 809887646, now seen corresponding path program 1 times [2021-11-20 07:08:12,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410297699] [2021-11-20 07:08:12,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:12,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:12,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:08:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:12,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:08:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:13,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:08:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:13,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:08:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:13,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:08:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:13,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:13,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410297699] [2021-11-20 07:08:13,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410297699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:13,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:13,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:08:13,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410161825] [2021-11-20 07:08:13,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:13,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:08:13,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:13,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:08:13,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:08:13,071 INFO L87 Difference]: Start difference. First operand 3969 states and 5868 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:15,910 INFO L93 Difference]: Finished difference Result 12181 states and 18669 transitions. [2021-11-20 07:08:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:08:15,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:08:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:15,984 INFO L225 Difference]: With dead ends: 12181 [2021-11-20 07:08:15,984 INFO L226 Difference]: Without dead ends: 9175 [2021-11-20 07:08:16,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:08:16,004 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 892 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:16,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 1868 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:08:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9175 states. [2021-11-20 07:08:16,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9175 to 6961. [2021-11-20 07:08:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6208 states have (on average 1.4921069587628866) internal successors, (9263), 6258 states have internal predecessors, (9263), 482 states have call successors, (482), 230 states have call predecessors, (482), 269 states have return successors, (822), 504 states have call predecessors, (822), 479 states have call successors, (822) [2021-11-20 07:08:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 10567 transitions. [2021-11-20 07:08:16,855 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 10567 transitions. Word has length 102 [2021-11-20 07:08:16,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:16,856 INFO L470 AbstractCegarLoop]: Abstraction has 6961 states and 10567 transitions. [2021-11-20 07:08:16,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 10567 transitions. [2021-11-20 07:08:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:08:16,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:16,867 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:08:16,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:08:16,868 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:16,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:16,869 INFO L85 PathProgramCache]: Analyzing trace with hash 836953248, now seen corresponding path program 1 times [2021-11-20 07:08:16,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:16,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746085847] [2021-11-20 07:08:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:16,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:16,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:08:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:16,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:08:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:16,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:08:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:16,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:08:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:16,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:08:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:16,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:16,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746085847] [2021-11-20 07:08:16,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746085847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:16,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:16,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:08:16,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15246900] [2021-11-20 07:08:16,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:16,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:08:16,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:08:16,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:08:16,998 INFO L87 Difference]: Start difference. First operand 6961 states and 10567 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:20,271 INFO L93 Difference]: Finished difference Result 22757 states and 35392 transitions. [2021-11-20 07:08:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:08:20,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:08:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:20,366 INFO L225 Difference]: With dead ends: 22757 [2021-11-20 07:08:20,366 INFO L226 Difference]: Without dead ends: 16759 [2021-11-20 07:08:20,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:08:20,398 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 929 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:20,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 1819 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 07:08:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16759 states. [2021-11-20 07:08:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16759 to 12929. [2021-11-20 07:08:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12929 states, 11568 states have (on average 1.5118430152143845) internal successors, (17489), 11650 states have internal predecessors, (17489), 866 states have call successors, (866), 422 states have call predecessors, (866), 493 states have return successors, (1756), 920 states have call predecessors, (1756), 863 states have call successors, (1756) [2021-11-20 07:08:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12929 states to 12929 states and 20111 transitions. [2021-11-20 07:08:22,061 INFO L78 Accepts]: Start accepts. Automaton has 12929 states and 20111 transitions. Word has length 102 [2021-11-20 07:08:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:22,062 INFO L470 AbstractCegarLoop]: Abstraction has 12929 states and 20111 transitions. [2021-11-20 07:08:22,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 12929 states and 20111 transitions. [2021-11-20 07:08:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:08:22,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:22,080 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:08:22,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:08:22,080 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:22,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:22,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1240383650, now seen corresponding path program 1 times [2021-11-20 07:08:22,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:22,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554120178] [2021-11-20 07:08:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:22,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:22,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:08:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:22,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:08:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:22,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:08:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:22,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:08:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:22,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:08:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:22,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:22,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554120178] [2021-11-20 07:08:22,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554120178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:22,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:22,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:08:22,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177640812] [2021-11-20 07:08:22,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:22,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:08:22,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:22,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:08:22,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:08:22,221 INFO L87 Difference]: Start difference. First operand 12929 states and 20111 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:26,906 INFO L93 Difference]: Finished difference Result 43317 states and 68542 transitions. [2021-11-20 07:08:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:08:26,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:08:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:27,092 INFO L225 Difference]: With dead ends: 43317 [2021-11-20 07:08:27,092 INFO L226 Difference]: Without dead ends: 31351 [2021-11-20 07:08:27,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:08:27,161 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 891 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1815 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:27,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [913 Valid, 1815 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:08:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31351 states. [2021-11-20 07:08:29,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31351 to 24833. [2021-11-20 07:08:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24833 states, 22288 states have (on average 1.5242731514716439) internal successors, (33973), 22434 states have internal predecessors, (33973), 1602 states have call successors, (1602), 806 states have call predecessors, (1602), 941 states have return successors, (4078), 1720 states have call predecessors, (4078), 1599 states have call successors, (4078) [2021-11-20 07:08:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24833 states to 24833 states and 39653 transitions. [2021-11-20 07:08:29,887 INFO L78 Accepts]: Start accepts. Automaton has 24833 states and 39653 transitions. Word has length 102 [2021-11-20 07:08:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:29,888 INFO L470 AbstractCegarLoop]: Abstraction has 24833 states and 39653 transitions. [2021-11-20 07:08:29,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 24833 states and 39653 transitions. [2021-11-20 07:08:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:08:30,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:30,140 INFO L514 BasicCegarLoop]: 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] [2021-11-20 07:08:30,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:08:30,141 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:30,141 INFO L85 PathProgramCache]: Analyzing trace with hash 493720800, now seen corresponding path program 1 times [2021-11-20 07:08:30,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:30,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439912792] [2021-11-20 07:08:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:30,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:30,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:08:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:30,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:08:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:30,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:08:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:08:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:30,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:08:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:30,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:30,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439912792] [2021-11-20 07:08:30,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439912792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:30,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:30,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:08:30,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167185071] [2021-11-20 07:08:30,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:30,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:08:30,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:30,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:08:30,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:08:30,267 INFO L87 Difference]: Start difference. First operand 24833 states and 39653 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:36,888 INFO L93 Difference]: Finished difference Result 82243 states and 130945 transitions. [2021-11-20 07:08:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:08:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-11-20 07:08:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:37,239 INFO L225 Difference]: With dead ends: 82243 [2021-11-20 07:08:37,239 INFO L226 Difference]: Without dead ends: 58373 [2021-11-20 07:08:37,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:08:37,332 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 1111 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:37,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 1536 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:08:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58373 states. [2021-11-20 07:08:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58373 to 47417. [2021-11-20 07:08:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47417 states, 42439 states have (on average 1.512311788684936) internal successors, (64181), 42841 states have internal predecessors, (64181), 3139 states have call successors, (3139), 1574 states have call predecessors, (3139), 1837 states have return successors, (7929), 3129 states have call predecessors, (7929), 3136 states have call successors, (7929) [2021-11-20 07:08:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47417 states to 47417 states and 75249 transitions. [2021-11-20 07:08:41,835 INFO L78 Accepts]: Start accepts. Automaton has 47417 states and 75249 transitions. Word has length 102 [2021-11-20 07:08:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:42,028 INFO L470 AbstractCegarLoop]: Abstraction has 47417 states and 75249 transitions. [2021-11-20 07:08:42,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:08:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 47417 states and 75249 transitions. [2021-11-20 07:08:42,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 07:08:42,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:42,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:42,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 07:08:42,095 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:42,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1031380781, now seen corresponding path program 1 times [2021-11-20 07:08:42,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:42,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480883665] [2021-11-20 07:08:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:42,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:42,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:08:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:42,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:08:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:42,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:08:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:42,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 07:08:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:42,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:08:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:08:42,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:42,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480883665] [2021-11-20 07:08:42,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480883665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:42,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833006137] [2021-11-20 07:08:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:42,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:42,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:42,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:42,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:08:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:08:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:08:42,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:42,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833006137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:42,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:08:42,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 07:08:42,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36910827] [2021-11-20 07:08:42,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:42,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:08:42,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:42,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:08:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:08:42,564 INFO L87 Difference]: Start difference. First operand 47417 states and 75249 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:08:45,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:45,535 INFO L93 Difference]: Finished difference Result 47796 states and 75717 transitions. [2021-11-20 07:08:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:08:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-11-20 07:08:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:45,751 INFO L225 Difference]: With dead ends: 47796 [2021-11-20 07:08:45,752 INFO L226 Difference]: Without dead ends: 46470 [2021-11-20 07:08:45,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:08:45,780 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 62 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:45,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 840 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:08:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46470 states. [2021-11-20 07:08:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46470 to 46470. [2021-11-20 07:08:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46470 states, 41595 states have (on average 1.5175622069960333) internal successors, (63123), 41981 states have internal predecessors, (63123), 3082 states have call successors, (3082), 1537 states have call predecessors, (3082), 1792 states have return successors, (7837), 3079 states have call predecessors, (7837), 3080 states have call successors, (7837) [2021-11-20 07:08:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46470 states to 46470 states and 74042 transitions. [2021-11-20 07:08:49,772 INFO L78 Accepts]: Start accepts. Automaton has 46470 states and 74042 transitions. Word has length 103 [2021-11-20 07:08:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:49,772 INFO L470 AbstractCegarLoop]: Abstraction has 46470 states and 74042 transitions. [2021-11-20 07:08:49,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:08:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 46470 states and 74042 transitions. [2021-11-20 07:08:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-20 07:08:49,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:49,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:49,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:50,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:50,120 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:50,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:50,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1230757169, now seen corresponding path program 1 times [2021-11-20 07:08:50,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:50,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889698629] [2021-11-20 07:08:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:50,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:08:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:50,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:08:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:50,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:08:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:50,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:08:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:08:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 07:08:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:50,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 07:08:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:50,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-20 07:08:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:08:50,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:50,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889698629] [2021-11-20 07:08:50,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889698629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:50,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629065900] [2021-11-20 07:08:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:50,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:50,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:50,300 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:50,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:08:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:50,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:08:50,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 07:08:50,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:50,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629065900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:50,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:08:50,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-20 07:08:50,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877317230] [2021-11-20 07:08:50,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:50,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:08:50,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:50,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:08:50,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:08:50,833 INFO L87 Difference]: Start difference. First operand 46470 states and 74042 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 07:08:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:56,731 INFO L93 Difference]: Finished difference Result 138480 states and 222072 transitions. [2021-11-20 07:08:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:08:56,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2021-11-20 07:08:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:57,141 INFO L225 Difference]: With dead ends: 138480 [2021-11-20 07:08:57,142 INFO L226 Difference]: Without dead ends: 92026 [2021-11-20 07:08:57,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:08:57,545 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 264 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:57,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 613 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:08:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92026 states. [2021-11-20 07:09:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92026 to 91510. [2021-11-20 07:09:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91510 states, 81897 states have (on average 1.5162826477160336) internal successors, (124179), 82667 states have internal predecessors, (124179), 6028 states have call successors, (6028), 3073 states have call predecessors, (6028), 3584 states have return successors, (15411), 5897 states have call predecessors, (15411), 6026 states have call successors, (15411) [2021-11-20 07:09:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91510 states to 91510 states and 145618 transitions. [2021-11-20 07:09:04,928 INFO L78 Accepts]: Start accepts. Automaton has 91510 states and 145618 transitions. Word has length 165 [2021-11-20 07:09:04,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:04,929 INFO L470 AbstractCegarLoop]: Abstraction has 91510 states and 145618 transitions. [2021-11-20 07:09:04,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 07:09:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 91510 states and 145618 transitions. [2021-11-20 07:09:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-20 07:09:05,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:05,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:05,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:05,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:05,344 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:05,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1911615983, now seen corresponding path program 1 times [2021-11-20 07:09:05,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:05,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856535754] [2021-11-20 07:09:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:05,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:05,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:09:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:05,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:09:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:05,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:09:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:05,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:09:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:05,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:09:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:05,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 07:09:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:05,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 07:09:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:05,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-20 07:09:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:09:05,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:05,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856535754] [2021-11-20 07:09:05,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856535754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:09:05,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809179498] [2021-11-20 07:09:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:05,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:05,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:05,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:05,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_714130ef-6c3f-44fb-abcb-54c9f4bdbe14/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:09:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:05,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:09:05,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:09:06,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:09:06,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809179498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:09:06,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:09:06,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-20 07:09:06,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113016433] [2021-11-20 07:09:06,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:09:06,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:09:06,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:09:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:09:06,098 INFO L87 Difference]: Start difference. First operand 91510 states and 145618 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)