./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f29cc89d3ee64e709bcde3f8f1e5c1c29a2d05992b7eca470a9d177af894449a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:04:36,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:04:36,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:04:36,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:04:36,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:04:36,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:04:36,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:04:36,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:04:36,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:04:36,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:04:36,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:04:36,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:04:36,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:04:36,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:04:36,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:04:36,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:04:36,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:04:36,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:04:36,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:04:36,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:04:36,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:04:36,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:04:36,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:04:36,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:04:36,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:04:36,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:04:36,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:04:36,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:04:36,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:04:36,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:04:36,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:04:36,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:04:36,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:04:36,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:04:36,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:04:36,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:04:36,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:04:36,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:04:36,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:04:36,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:04:36,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:04:36,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:04:36,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:04:36,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:04:36,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:04:36,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:04:36,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:04:36,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:04:36,967 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:04:36,967 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:04:36,968 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:04:36,968 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:04:36,968 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:04:36,968 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:04:36,968 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:04:36,968 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:04:36,968 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:04:36,969 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:04:36,969 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:04:36,969 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:04:36,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:04:36,969 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:04:36,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:04:36,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:04:36,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:04:36,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:04:36,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:04:36,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:04:36,971 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:04:36,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:04:36,971 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:04:36,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:04:36,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:04:36,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:04:36,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:04:36,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:04:36,972 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:04:36,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:04:36,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:04:36,972 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:04:36,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:04:36,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:04:36,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:04:36,972 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_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f29cc89d3ee64e709bcde3f8f1e5c1c29a2d05992b7eca470a9d177af894449a [2022-12-14 15:04:37,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:04:37,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:04:37,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:04:37,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:04:37,176 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:04:37,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/email_spec7_product28.cil.c [2022-12-14 15:04:39,671 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:04:39,918 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:04:39,918 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/sv-benchmarks/c/product-lines/email_spec7_product28.cil.c [2022-12-14 15:04:39,933 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/data/5fd611cfe/4b882f6f3007434c9dee8eb11f32efb0/FLAG66dd97f12 [2022-12-14 15:04:40,235 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/data/5fd611cfe/4b882f6f3007434c9dee8eb11f32efb0 [2022-12-14 15:04:40,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:04:40,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:04:40,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:04:40,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:04:40,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:04:40,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160adcb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40, skipping insertion in model container [2022-12-14 15:04:40,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:04:40,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:04:40,404 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/sv-benchmarks/c/product-lines/email_spec7_product28.cil.c[1542,1555] [2022-12-14 15:04:40,460 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 15:04:40,464 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 15:04:40,491 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 15:04:40,493 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 15:04:40,495 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 15:04:40,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:04:40,599 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:04:40,608 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/sv-benchmarks/c/product-lines/email_spec7_product28.cil.c[1542,1555] [2022-12-14 15:04:40,615 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 15:04:40,617 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 15:04:40,624 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 15:04:40,625 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 15:04:40,627 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 15:04:40,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:04:40,689 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:04:40,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40 WrapperNode [2022-12-14 15:04:40,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:04:40,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:04:40,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:04:40,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:04:40,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,762 INFO L138 Inliner]: procedures = 128, calls = 205, calls flagged for inlining = 55, calls inlined = 45, statements flattened = 839 [2022-12-14 15:04:40,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:04:40,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:04:40,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:04:40,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:04:40,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,795 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:04:40,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:04:40,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:04:40,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:04:40,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (1/1) ... [2022-12-14 15:04:40,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:04:40,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:04:40,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:04:40,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:04:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-12-14 15:04:40,864 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-12-14 15:04:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-12-14 15:04:40,864 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-12-14 15:04:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-12-14 15:04:40,864 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-12-14 15:04:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-12-14 15:04:40,864 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-12-14 15:04:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-12-14 15:04:40,865 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-12-14 15:04:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-12-14 15:04:40,865 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-12-14 15:04:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-12-14 15:04:40,865 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-12-14 15:04:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-12-14 15:04:40,865 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-12-14 15:04:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-12-14 15:04:40,866 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-12-14 15:04:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-12-14 15:04:40,866 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-12-14 15:04:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-12-14 15:04:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-12-14 15:04:40,866 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-12-14 15:04:40,874 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-12-14 15:04:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-12-14 15:04:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:04:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-12-14 15:04:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-12-14 15:04:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-12-14 15:04:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-12-14 15:04:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-12-14 15:04:40,876 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-12-14 15:04:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-12-14 15:04:40,876 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-12-14 15:04:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-12-14 15:04:40,876 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-12-14 15:04:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-12-14 15:04:40,876 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-12-14 15:04:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-12-14 15:04:40,876 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-12-14 15:04:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-12-14 15:04:40,877 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-12-14 15:04:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-12-14 15:04:40,877 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-12-14 15:04:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:04:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-12-14 15:04:40,877 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-12-14 15:04:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:04:40,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:04:41,024 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:04:41,026 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:04:41,529 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:04:41,876 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:04:41,876 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:04:41,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:04:41 BoogieIcfgContainer [2022-12-14 15:04:41,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:04:41,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:04:41,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:04:41,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:04:41,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:04:40" (1/3) ... [2022-12-14 15:04:41,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fa9760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:04:41, skipping insertion in model container [2022-12-14 15:04:41,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:04:40" (2/3) ... [2022-12-14 15:04:41,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fa9760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:04:41, skipping insertion in model container [2022-12-14 15:04:41,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:04:41" (3/3) ... [2022-12-14 15:04:41,885 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec7_product28.cil.c [2022-12-14 15:04:41,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:04:41,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:04:41,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:04:41,947 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b977506, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:04:41,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:04:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 104 states have (on average 1.3365384615384615) internal successors, (139), 108 states have internal predecessors, (139), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-12-14 15:04:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 15:04:41,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:41,963 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-14 15:04:41,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash 199475510, now seen corresponding path program 1 times [2022-12-14 15:04:41,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:41,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72444423] [2022-12-14 15:04:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:41,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:04:42,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:42,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72444423] [2022-12-14 15:04:42,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72444423] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:42,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:04:42,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:04:42,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533917863] [2022-12-14 15:04:42,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:42,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 15:04:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:42,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 15:04:42,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 15:04:42,314 INFO L87 Difference]: Start difference. First operand has 177 states, 104 states have (on average 1.3365384615384615) internal successors, (139), 108 states have internal predecessors, (139), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:04:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:42,416 INFO L93 Difference]: Finished difference Result 271 states and 352 transitions. [2022-12-14 15:04:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 15:04:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 74 [2022-12-14 15:04:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:42,429 INFO L225 Difference]: With dead ends: 271 [2022-12-14 15:04:42,430 INFO L226 Difference]: Without dead ends: 174 [2022-12-14 15:04:42,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 15:04:42,436 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:42,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 204 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:04:42,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-14 15:04:42,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-12-14 15:04:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 102 states have (on average 1.303921568627451) internal successors, (133), 105 states have internal predecessors, (133), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 15:04:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 230 transitions. [2022-12-14 15:04:42,487 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 230 transitions. Word has length 74 [2022-12-14 15:04:42,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:42,488 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 230 transitions. [2022-12-14 15:04:42,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:04:42,489 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 230 transitions. [2022-12-14 15:04:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 15:04:42,492 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:42,492 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-14 15:04:42,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:04:42,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:42,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1221003070, now seen corresponding path program 1 times [2022-12-14 15:04:42,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:42,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379178166] [2022-12-14 15:04:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:42,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:04:42,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:42,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379178166] [2022-12-14 15:04:42,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379178166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:42,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:04:42,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:04:42,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785947184] [2022-12-14 15:04:42,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:42,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:42,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:42,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:42,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:04:42,703 INFO L87 Difference]: Start difference. First operand 174 states and 230 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:04:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:42,792 INFO L93 Difference]: Finished difference Result 267 states and 340 transitions. [2022-12-14 15:04:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:42,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 75 [2022-12-14 15:04:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:42,794 INFO L225 Difference]: With dead ends: 267 [2022-12-14 15:04:42,794 INFO L226 Difference]: Without dead ends: 176 [2022-12-14 15:04:42,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:04:42,795 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:42,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 401 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:04:42,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-12-14 15:04:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-12-14 15:04:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 107 states have internal predecessors, (135), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 15:04:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 232 transitions. [2022-12-14 15:04:42,808 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 232 transitions. Word has length 75 [2022-12-14 15:04:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:42,809 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 232 transitions. [2022-12-14 15:04:42,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:04:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 232 transitions. [2022-12-14 15:04:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 15:04:42,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:42,810 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-14 15:04:42,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:04:42,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:42,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2119291828, now seen corresponding path program 1 times [2022-12-14 15:04:42,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:42,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503233977] [2022-12-14 15:04:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:04:42,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503233977] [2022-12-14 15:04:42,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503233977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:42,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:04:42,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:04:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514718659] [2022-12-14 15:04:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:42,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:42,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:42,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:04:42,889 INFO L87 Difference]: Start difference. First operand 176 states and 232 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:04:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:42,968 INFO L93 Difference]: Finished difference Result 382 states and 523 transitions. [2022-12-14 15:04:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 80 [2022-12-14 15:04:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:42,970 INFO L225 Difference]: With dead ends: 382 [2022-12-14 15:04:42,970 INFO L226 Difference]: Without dead ends: 224 [2022-12-14 15:04:42,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:04:42,972 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 57 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:42,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 415 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:04:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-12-14 15:04:42,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 219. [2022-12-14 15:04:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 136 states have (on average 1.3823529411764706) internal successors, (188), 139 states have internal predecessors, (188), 60 states have call successors, (60), 22 states have call predecessors, (60), 22 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-12-14 15:04:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 307 transitions. [2022-12-14 15:04:42,987 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 307 transitions. Word has length 80 [2022-12-14 15:04:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:42,987 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 307 transitions. [2022-12-14 15:04:42,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:04:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 307 transitions. [2022-12-14 15:04:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 15:04:42,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:42,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-14 15:04:42,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:04:42,990 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:42,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1327044237, now seen corresponding path program 1 times [2022-12-14 15:04:42,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:42,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990966463] [2022-12-14 15:04:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:42,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:04:43,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:43,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990966463] [2022-12-14 15:04:43,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990966463] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:04:43,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930573367] [2022-12-14 15:04:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:43,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:43,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:04:43,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:04:43,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:04:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:43,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:04:43,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:04:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:04:43,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:04:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:04:43,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930573367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:04:43,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [316634265] [2022-12-14 15:04:43,474 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 15:04:43,474 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:04:43,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:04:43,481 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:04:43,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:05:06,887 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-12-14 15:05:07,173 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-12-14 15:05:07,460 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 258 for LOIs [2022-12-14 15:05:08,159 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 253 for LOIs [2022-12-14 15:05:28,781 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 247 for LOIs [2022-12-14 15:05:29,646 INFO L197 IcfgInterpreter]: Interpreting procedure isEncrypted with input of size 247 for LOIs [2022-12-14 15:05:29,685 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 459 for LOIs [2022-12-14 15:05:30,254 INFO L197 IcfgInterpreter]: Interpreting procedure findPublicKey with input of size 245 for LOIs [2022-12-14 15:05:30,319 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 243 for LOIs [2022-12-14 15:05:30,357 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 476 for LOIs [2022-12-14 15:05:33,520 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:06:12,706 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 564 DAG size of output: 435 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:06:50,378 WARN L233 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 459 DAG size of output: 349 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:06:58,247 WARN L233 SmtUtils]: Spent 7.44s on a formula simplification. DAG size of input: 485 DAG size of output: 365 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:07:49,984 WARN L233 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 652 DAG size of output: 413 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:07:55,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3054#(and (= ~queued_client~0 0) (= ~__ste_Client_Keyring1_User2~0 0) (= ~__GUIDSL_NON_TERMINAL_main~0 0) (= |old(~__ste_email_encryptionKey0~0)| 0) (= 0 |old(~__ste_email_isSignatureVerified1~0)|) (<= 1 |outgoing_outgoing__wrappee__Keys_~msg#1|) (= ~__ste_email_subject0~0.offset 0) (<= 0 ~__ste_email_encryptionKey1~0) (= |outgoing___utac_acc__EncryptVerify_spec__1_~tmp~17#1| 0) (= ~__SELECTED_FEATURE_Sign~0 0) (= 0 ~__ste_Client_AddressBook0_Address2~0) (= ~__ste_client_outbuffer3~0 0) (<= 1 |outgoing_mail_#in~client#1|) (<= |outgoing_mail_#in~msg#1| 1) (<= 0 (+ 2147483648 |outgoing_getClientId_#res#1|)) (= ~__ste_Client_counter~0 0) (= ~__ste_Client_Keyring1_PublicKey2~0 0) (<= 0 (+ 2147483648 |outgoing_sign_~tmp~11#1|)) (<= ~__ste_email_encryptionKey1~0 0) (<= ~__ste_email_isSignatureVerified1~0 0) (= |outgoing_incoming_~tmp~8#1| |outgoing_incoming_~privkey~0#1|) (= ~__ste_client_autoResponse1~0 0) (= ~__ste_Client_AddressBook2_Alias0~0 0) (= 0 ~__ste_email_subject0~0.base) (<= 1 |outgoing_sign_~client#1|) (<= 1 |outgoing_mail_~msg#1|) (= ~__ste_Client_AddressBook2_Alias1~0 0) (= ~__ste_Client_Keyring2_PublicKey2~0 0) (= ~__ste_client_forwardReceiver3~0 0) (<= |outgoing_sign_~privkey~1#1| 2147483647) (= ~__ste_client_name2~0.offset 0) (<= |outgoing_outgoing__wrappee__Keys_~tmp~6#1| 2147483647) (= ~__ste_client_name1~0.base 0) (= |outgoing_verify_~__utac__ad__arg1~0#1| |outgoing_verify_~msg#1|) (= ~__SELECTED_FEATURE_Verify~0 0) (= ~__ste_Client_Keyring1_User0~0 0) (= 0 |old(~__ste_email_isSignatureVerified0~0)|) (<= |outgoing_sign_~msg#1| 1) (<= ~__ste_client_idCounter2~0 3) (<= ~__ste_email_isSignatureVerified0~0 0) (= ~__ste_email_body1~0.offset 0) (= ~__SELECTED_FEATURE_Encrypt~0 0) (= |outgoing___utac_acc__EncryptVerify_spec__1_~msg#1| |outgoing___utac_acc__EncryptVerify_spec__1_#in~msg#1|) (= ~__ste_Client_AddressBook1_Address2~0 0) (<= 1 |outgoing___utac_acc__EncryptVerify_spec__1_#in~msg#1|) (<= ~__ste_email_from0~0 2147483647) (<= 1 |outgoing_outgoing__wrappee__Encrypt_~msg#1|) (= ~__ste_ClientAddressBook_size1~0 0) (= ~__ste_Client_Keyring0_PublicKey0~0 0) (= ~__ste_Email_counter~0 0) (<= |outgoing_incoming_#in~msg#1| 1) (<= |outgoing_sign_~client#1| 1) (= ~__ste_ClientKeyring_size1~0 0) (= |old(~__ste_email_signKey0~0)| 0) (= ~__ste_email_body0~0.offset 0) (<= 1 |outgoing_~client#1|) (<= 1 |outgoing_outgoing__wrappee__Encrypt_#in~msg#1|) (<= 0 ~__ste_email_isSigned1~0) (<= 0 (+ ~__ste_email_from0~0 2147483648)) (= ~__ste_Client_Keyring0_User2~0 0) (= ~__ste_ClientAddressBook_size0~0 0) (= ~__ste_Client_Keyring0_User1~0 0) (= ~__ste_Client_AddressBook1_Alias1~0 0) (= ~__ste_email_to1~0 0) (= ~__ste_client_name1~0.offset 0) (<= |outgoing_getClientId_#res#1| 2147483647) (<= 1 |outgoing_outgoing__wrappee__Encrypt_~client#1|) (= ~head~0.offset 0) (= ~__ste_client_name0~0.offset 0) (= |outgoing_#in~msg#1| 1) (<= 1 |outgoing_outgoing__wrappee__Keys_~client#1|) (= ~__ste_Client_Keyring0_PublicKey2~0 0) (<= 1 |outgoing_verify_#in~msg#1|) (<= ~__ste_client_privateKey2~0 789) (= ~__ste_Client_Keyring1_PublicKey0~0 0) (= |old(~__ste_email_from0~0)| 0) (<= |outgoing_sign_#in~client#1| 1) (<= 1 |outgoing_incoming_#in~msg#1|) (= ~__SELECTED_FEATURE_Decrypt~0 0) (<= 1 |outgoing_getClientId_~handle#1|) (<= 0 (+ ~__ste_email_signKey0~0 2147483648)) (<= 0 ~__ste_email_isEncrypted1~0) (= ~__SELECTED_FEATURE_Keys~0 0) (<= ~__ste_email_signKey0~0 2147483647) (= |old(~__ste_email_isSigned0~0)| 0) (= ~__SELECTED_FEATURE_AddressBook~0 0) (= ~__ste_client_forwardReceiver2~0 0) (= ~__ste_Client_Keyring0_PublicKey1~0 0) (= ~__SELECTED_FEATURE_Forward~0 0) (<= 0 ~__ste_email_isEncrypted0~0) (= ~__ste_Client_Keyring0_User0~0 0) (<= 1 |outgoing_mail_#in~msg#1|) (<= ~__ste_client_idCounter0~0 2147483647) (= ~__ste_Client_Keyring2_PublicKey1~0 0) (= ~__ste_email_body0~0.base 0) (<= ~__ste_email_isSigned0~0 1) (<= ~__ste_email_isEncrypted0~0 0) (= ~__ste_Client_AddressBook0_Alias0~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~msg#1|) (= ~__ste_email_id0~0 0) (= ~__ste_Client_Keyring2_User1~0 0) (<= 3 ~__ste_client_idCounter2~0) (= ~__ste_Client_AddressBook2_Address2~0 0) (= 3 ~chuck~0) (= ~__ste_Client_AddressBook2_Address1~0 0) (<= 0 ~__ste_email_signKey1~0) (<= ~__ste_email_signKey1~0 0) (<= ~__ste_email_isSigned1~0 0) (<= |outgoing_outgoing__wrappee__Encrypt_~receiver~0#1| 2) (= ~bob~0 1) (= ~__ste_client_forwardReceiver1~0 0) (= |outgoing_incoming_~privkey~0#1| 0) (= ~__ste_Client_AddressBook1_Alias2~0 0) (<= 0 ~__ste_email_isSignatureVerified1~0) (= |old(~__ste_email_isEncrypted0~0)| 0) (= ~__ste_client_outbuffer0~0 0) (<= |outgoing_outgoing__wrappee__Keys_~client#1| 1) (<= 789 ~__ste_client_privateKey2~0) (<= 1 |outgoing_sign_#in~client#1|) (<= |outgoing_getClientId_#in~handle#1| 1) (<= 1 |outgoing_sign_~msg#1|) (= ~queue_empty~0 1) (<= 1 |outgoing_~msg#1|) (= ~__SELECTED_FEATURE_Base~0 0) (= |old(~__ste_email_signKey1~0)| 0) (= ~__ste_client_forwardReceiver0~0 0) (<= |outgoing_mail_~client#1| 1) (= ~__ste_Client_Keyring2_User0~0 0) (= ~rjh~0 2) (= 0 ~__ste_Client_AddressBook0_Address1~0) (= ~__ste_Client_AddressBook2_Address0~0 0) (= ~__ste_Client_Keyring1_PublicKey1~0 0) (<= 1 |outgoing_outgoing__wrappee__Encrypt_#in~client#1|) (= ~__ste_Client_Keyring2_PublicKey0~0 0) (<= 0 ~__ste_email_isSignatureVerified0~0) (= ~__ste_Client_AddressBook1_Address0~0 0) (= ~__ste_client_name2~0.base 0) (<= |outgoing_mail_~msg#1| 1) (<= |outgoing_incoming__wrappee__Verify_#in~client#1| 2) (= |outgoing_incoming_~msg#1| |outgoing_incoming__wrappee__Verify_#in~msg#1|) (<= ~__ste_email_encryptionKey0~0 0) (= |outgoing_incoming__wrappee__Verify_~client#1| |outgoing_verify_#in~client#1|) (<= |outgoing_getClientId_~retValue_acc~32#1| 2147483647) (= ~__ste_email_subject1~0.base 0) (<= |outgoing_mail_~tmp~5#1| 2) (<= 2 |outgoing_outgoing__wrappee__Encrypt_~receiver~0#1|) (= ~__ste_Client_AddressBook1_Alias0~0 0) (<= |outgoing_mail_#in~client#1| 1) (<= |outgoing_outgoing__wrappee__Keys_#in~client#1| 1) (= ~__ste_Client_Keyring2_User2~0 0) (= |outgoing_incoming__wrappee__Verify_~msg#1| |outgoing_verify_#in~msg#1|) (= ~head~0.base 0) (<= 0 |outgoing_outgoing__wrappee__Encrypt_~tmp___0~3#1|) (<= |outgoing_outgoing__wrappee__Encrypt_#in~msg#1| 1) (= ~__ste_Client_Keyring1_User1~0 0) (= |#NULL.offset| 0) (<= |outgoing_incoming_~msg#1| 1) (<= |outgoing_sign_#in~msg#1| 1) (= ~__ste_Client_AddressBook2_Alias2~0 0) (<= |outgoing_#in~client#1| 1) (<= 1 |outgoing_incoming_~msg#1|) (<= 0 (+ |outgoing_sign_~privkey~1#1| 2147483648)) (<= 0 ~__ste_email_isSigned0~0) (= |outgoing_incoming_~client#1| |outgoing_incoming__wrappee__Verify_#in~client#1|) (= ~__ste_email_subject1~0.offset 0) (= ~__ste_Client_AddressBook0_Alias2~0 0) (= ~__ste_ClientKeyring_size0~0 0) (<= |outgoing___utac_acc__EncryptVerify_spec__1_~msg#1| 1) (<= |outgoing_~msg#1| 1) (= ~queued_message~0 0) (= ~__ste_Client_AddressBook1_Address1~0 0) (<= |outgoing_outgoing__wrappee__Keys_~msg#1| 1) (<= |outgoing_outgoing__wrappee__Encrypt_~msg#1| 1) (= 0 ~__ste_Client_AddressBook0_Address0~0) (<= |outgoing_outgoing__wrappee__Encrypt_~tmp___0~3#1| 0) (= ~__ste_client_outbuffer1~0 0) (<= |outgoing_incoming__wrappee__Verify_~msg#1| 1) (= |old(~__ste_email_isSigned1~0)| 0) (= ~__ste_Client_AddressBook0_Alias1~0 0) (<= ~__ste_email_isEncrypted1~0 0) (= |old(~__ste_email_isEncrypted1~0)| 0) (<= 1 |outgoing_getClientId_#in~handle#1|) (= ~__GUIDSL_ROOT_PRODUCTION~0 0) (= |outgoing_outgoing__wrappee__Encrypt_~pubkey~0#1| 0) (<= |outgoing_getClientId_~handle#1| 1) (<= 1 |outgoing_sign_#in~msg#1|) (<= 1 |outgoing_#in~client#1|) (<= |outgoing_~client#1| 1) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_~tmp~6#1| 2147483648)) (= |old(~__ste_email_encryptionKey1~0)| 0) (<= 2 |outgoing_incoming_#in~client#1|) (= ~__ste_client_name0~0.base 0) (= ~__ste_email_id1~0 0) (= |outgoing_verify_~client#1| |outgoing_verify_#in~client#1|) (<= |outgoing_outgoing__wrappee__Encrypt_~tmp~7#1| 2) (= ~__ste_client_outbuffer2~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~client#1|) (<= |outgoing_outgoing__wrappee__Encrypt_#in~client#1| 1) (<= 0 (+ ~__ste_client_idCounter0~0 2147483648)) (<= 2 |outgoing_outgoing__wrappee__Encrypt_~tmp~7#1|) (<= 2 ~__ste_email_to0~0) (<= 0 |#StackHeapBarrier|) (<= ~__ste_email_to0~0 2) (<= 1 |outgoing_mail_~client#1|) (= ~__ste_ClientAddressBook_size2~0 0) (<= 2 |outgoing_incoming__wrappee__Verify_~client#1|) (= ~__SELECTED_FEATURE_AutoResponder~0 0) (= ~__ste_client_autoResponse0~0 0) (= ~__ste_email_body1~0.base 0) (= |outgoing_verify_~msg#1| |outgoing_verify_#in~msg#1|) (= ~__ste_ClientKeyring_size2~0 0) (= ~__ste_client_autoResponse2~0 0) (<= |outgoing_verify_~client#1| 2) (<= 2 |outgoing_incoming__wrappee__Verify_#in~client#1|) (<= |outgoing_sign_~tmp~11#1| 2147483647) (<= |outgoing_outgoing__wrappee__Encrypt_~client#1| 1) (<= 0 ~__ste_email_encryptionKey0~0) (= |#NULL.base| 0) (<= |outgoing_incoming_#in~client#1| 2) (<= |outgoing_outgoing__wrappee__Keys_#in~msg#1| 1) (<= 2 |outgoing_mail_~tmp~5#1|) (<= 0 (+ |outgoing_getClientId_~retValue_acc~32#1| 2147483648)))' at error location [2022-12-14 15:07:55,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:07:55,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:07:55,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 15:07:55,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000620849] [2022-12-14 15:07:55,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:07:55,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:07:55,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:55,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:07:55,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3825, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 15:07:55,539 INFO L87 Difference]: Start difference. First operand 219 states and 307 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 15:07:55,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:55,757 INFO L93 Difference]: Finished difference Result 560 states and 842 transitions. [2022-12-14 15:07:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:07:55,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 81 [2022-12-14 15:07:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:55,763 INFO L225 Difference]: With dead ends: 560 [2022-12-14 15:07:55,763 INFO L226 Difference]: Without dead ends: 469 [2022-12-14 15:07:55,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 142.0s TimeCoverageRelationStatistics Valid=207, Invalid=3825, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 15:07:55,766 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 212 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:55,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1013 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:07:55,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-12-14 15:07:55,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 454. [2022-12-14 15:07:55,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 307 states have (on average 1.511400651465798) internal successors, (464), 310 states have internal predecessors, (464), 124 states have call successors, (124), 22 states have call predecessors, (124), 22 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2022-12-14 15:07:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 711 transitions. [2022-12-14 15:07:55,791 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 711 transitions. Word has length 81 [2022-12-14 15:07:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:55,791 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 711 transitions. [2022-12-14 15:07:55,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 15:07:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 711 transitions. [2022-12-14 15:07:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 15:07:55,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:55,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-12-14 15:07:55,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:07:55,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:55,997 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash -996241942, now seen corresponding path program 1 times [2022-12-14 15:07:55,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:55,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468193712] [2022-12-14 15:07:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:56,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:07:56,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468193712] [2022-12-14 15:07:56,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468193712] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:56,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:56,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:56,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580818557] [2022-12-14 15:07:56,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:56,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:56,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:56,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:56,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:56,141 INFO L87 Difference]: Start difference. First operand 454 states and 711 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:56,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:56,244 INFO L93 Difference]: Finished difference Result 1113 states and 1780 transitions. [2022-12-14 15:07:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:56,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2022-12-14 15:07:56,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:56,249 INFO L225 Difference]: With dead ends: 1113 [2022-12-14 15:07:56,249 INFO L226 Difference]: Without dead ends: 691 [2022-12-14 15:07:56,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:56,251 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 55 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:56,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 421 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:07:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-12-14 15:07:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 686. [2022-12-14 15:07:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 475 states have (on average 1.5305263157894737) internal successors, (727), 478 states have internal predecessors, (727), 188 states have call successors, (188), 22 states have call predecessors, (188), 22 states have return successors, (187), 187 states have call predecessors, (187), 187 states have call successors, (187) [2022-12-14 15:07:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1102 transitions. [2022-12-14 15:07:56,289 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1102 transitions. Word has length 87 [2022-12-14 15:07:56,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:56,289 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 1102 transitions. [2022-12-14 15:07:56,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1102 transitions. [2022-12-14 15:07:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 15:07:56,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:56,293 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:07:56,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:07:56,294 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1504936564, now seen corresponding path program 1 times [2022-12-14 15:07:56,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:56,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50068015] [2022-12-14 15:07:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:56,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:07:56,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:56,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50068015] [2022-12-14 15:07:56,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50068015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:56,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:56,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:56,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515169650] [2022-12-14 15:07:56,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:56,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:56,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:56,359 INFO L87 Difference]: Start difference. First operand 686 states and 1102 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:56,464 INFO L93 Difference]: Finished difference Result 1670 states and 2723 transitions. [2022-12-14 15:07:56,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:56,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2022-12-14 15:07:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:56,470 INFO L225 Difference]: With dead ends: 1670 [2022-12-14 15:07:56,470 INFO L226 Difference]: Without dead ends: 1046 [2022-12-14 15:07:56,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:56,472 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 53 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:56,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 411 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:07:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-12-14 15:07:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1041. [2022-12-14 15:07:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 735 states have (on average 1.5387755102040817) internal successors, (1131), 738 states have internal predecessors, (1131), 283 states have call successors, (283), 22 states have call predecessors, (283), 22 states have return successors, (282), 282 states have call predecessors, (282), 282 states have call successors, (282) [2022-12-14 15:07:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1696 transitions. [2022-12-14 15:07:56,515 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1696 transitions. Word has length 88 [2022-12-14 15:07:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:56,515 INFO L495 AbstractCegarLoop]: Abstraction has 1041 states and 1696 transitions. [2022-12-14 15:07:56,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1696 transitions. [2022-12-14 15:07:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 15:07:56,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:56,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:07:56,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:07:56,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:56,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:56,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1697546636, now seen corresponding path program 1 times [2022-12-14 15:07:56,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:56,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021537407] [2022-12-14 15:07:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:56,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:07:56,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:56,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021537407] [2022-12-14 15:07:56,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021537407] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:56,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:56,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:56,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922935618] [2022-12-14 15:07:56,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:56,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:56,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:56,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:56,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:56,574 INFO L87 Difference]: Start difference. First operand 1041 states and 1696 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:56,709 INFO L93 Difference]: Finished difference Result 2468 states and 4067 transitions. [2022-12-14 15:07:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:56,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 89 [2022-12-14 15:07:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:56,714 INFO L225 Difference]: With dead ends: 2468 [2022-12-14 15:07:56,714 INFO L226 Difference]: Without dead ends: 1569 [2022-12-14 15:07:56,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:56,716 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 51 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:56,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 404 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:07:56,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-12-14 15:07:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1564. [2022-12-14 15:07:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1135 states have (on average 1.5444933920704846) internal successors, (1753), 1138 states have internal predecessors, (1753), 406 states have call successors, (406), 22 states have call predecessors, (406), 22 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2022-12-14 15:07:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2564 transitions. [2022-12-14 15:07:56,791 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2564 transitions. Word has length 89 [2022-12-14 15:07:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:56,791 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 2564 transitions. [2022-12-14 15:07:56,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2564 transitions. [2022-12-14 15:07:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 15:07:56,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:56,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:07:56,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:07:56,796 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1402428179, now seen corresponding path program 1 times [2022-12-14 15:07:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347569986] [2022-12-14 15:07:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:56,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:07:56,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347569986] [2022-12-14 15:07:56,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347569986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:56,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:56,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:56,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297449316] [2022-12-14 15:07:56,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:56,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:56,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:56,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:56,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:56,871 INFO L87 Difference]: Start difference. First operand 1564 states and 2564 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:57,054 INFO L93 Difference]: Finished difference Result 3678 states and 6095 transitions. [2022-12-14 15:07:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:57,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 90 [2022-12-14 15:07:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:57,062 INFO L225 Difference]: With dead ends: 3678 [2022-12-14 15:07:57,063 INFO L226 Difference]: Without dead ends: 2393 [2022-12-14 15:07:57,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:57,066 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 49 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:57,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 406 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:07:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2022-12-14 15:07:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2388. [2022-12-14 15:07:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 1780 states have (on average 1.547752808988764) internal successors, (2755), 1783 states have internal predecessors, (2755), 585 states have call successors, (585), 22 states have call predecessors, (585), 22 states have return successors, (584), 584 states have call predecessors, (584), 584 states have call successors, (584) [2022-12-14 15:07:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 3924 transitions. [2022-12-14 15:07:57,195 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 3924 transitions. Word has length 90 [2022-12-14 15:07:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:57,195 INFO L495 AbstractCegarLoop]: Abstraction has 2388 states and 3924 transitions. [2022-12-14 15:07:57,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 3924 transitions. [2022-12-14 15:07:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 15:07:57,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:57,204 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:07:57,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:07:57,205 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash 812076744, now seen corresponding path program 1 times [2022-12-14 15:07:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:57,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301185045] [2022-12-14 15:07:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:07:57,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:57,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301185045] [2022-12-14 15:07:57,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301185045] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:57,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:57,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301889426] [2022-12-14 15:07:57,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:57,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:57,261 INFO L87 Difference]: Start difference. First operand 2388 states and 3924 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:57,450 INFO L93 Difference]: Finished difference Result 5889 states and 9767 transitions. [2022-12-14 15:07:57,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:57,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 91 [2022-12-14 15:07:57,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:57,464 INFO L225 Difference]: With dead ends: 5889 [2022-12-14 15:07:57,464 INFO L226 Difference]: Without dead ends: 3923 [2022-12-14 15:07:57,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:57,470 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 47 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:57,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 416 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:07:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2022-12-14 15:07:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 3918. [2022-12-14 15:07:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 2934 states have (on average 1.5371506475800953) internal successors, (4510), 2937 states have internal predecessors, (4510), 961 states have call successors, (961), 22 states have call predecessors, (961), 22 states have return successors, (960), 960 states have call predecessors, (960), 960 states have call successors, (960) [2022-12-14 15:07:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 6431 transitions. [2022-12-14 15:07:57,662 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 6431 transitions. Word has length 91 [2022-12-14 15:07:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:57,662 INFO L495 AbstractCegarLoop]: Abstraction has 3918 states and 6431 transitions. [2022-12-14 15:07:57,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 6431 transitions. [2022-12-14 15:07:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 15:07:57,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:57,672 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:07:57,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:07:57,673 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:57,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2112547761, now seen corresponding path program 1 times [2022-12-14 15:07:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:57,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766192311] [2022-12-14 15:07:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:57,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:07:57,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:57,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766192311] [2022-12-14 15:07:57,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766192311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:57,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:57,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:57,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528406887] [2022-12-14 15:07:57,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:57,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:57,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:57,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:57,729 INFO L87 Difference]: Start difference. First operand 3918 states and 6431 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:58,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:58,077 INFO L93 Difference]: Finished difference Result 9750 states and 16164 transitions. [2022-12-14 15:07:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:58,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2022-12-14 15:07:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:58,103 INFO L225 Difference]: With dead ends: 9750 [2022-12-14 15:07:58,103 INFO L226 Difference]: Without dead ends: 6520 [2022-12-14 15:07:58,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:58,113 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 45 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:58,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 409 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:07:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2022-12-14 15:07:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 6515. [2022-12-14 15:07:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6515 states, 4925 states have (on average 1.5331979695431472) internal successors, (7551), 4928 states have internal predecessors, (7551), 1567 states have call successors, (1567), 22 states have call predecessors, (1567), 22 states have return successors, (1566), 1566 states have call predecessors, (1566), 1566 states have call successors, (1566) [2022-12-14 15:07:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6515 states to 6515 states and 10684 transitions. [2022-12-14 15:07:58,435 INFO L78 Accepts]: Start accepts. Automaton has 6515 states and 10684 transitions. Word has length 92 [2022-12-14 15:07:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:58,436 INFO L495 AbstractCegarLoop]: Abstraction has 6515 states and 10684 transitions. [2022-12-14 15:07:58,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 6515 states and 10684 transitions. [2022-12-14 15:07:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 15:07:58,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:58,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:07:58,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 15:07:58,450 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:58,450 INFO L85 PathProgramCache]: Analyzing trace with hash 80211018, now seen corresponding path program 1 times [2022-12-14 15:07:58,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:58,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468658635] [2022-12-14 15:07:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:58,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:07:58,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:58,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468658635] [2022-12-14 15:07:58,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468658635] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:58,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:58,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:58,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571085828] [2022-12-14 15:07:58,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:58,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:58,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:58,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:58,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:58,504 INFO L87 Difference]: Start difference. First operand 6515 states and 10684 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:58,986 INFO L93 Difference]: Finished difference Result 17002 states and 28082 transitions. [2022-12-14 15:07:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:58,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2022-12-14 15:07:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:59,033 INFO L225 Difference]: With dead ends: 17002 [2022-12-14 15:07:59,034 INFO L226 Difference]: Without dead ends: 11464 [2022-12-14 15:07:59,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:59,057 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 43 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:59,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 421 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:07:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11464 states. [2022-12-14 15:07:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11464 to 11459. [2022-12-14 15:07:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11459 states, 8666 states have (on average 1.5199630740826218) internal successors, (13172), 8669 states have internal predecessors, (13172), 2770 states have call successors, (2770), 22 states have call predecessors, (2770), 22 states have return successors, (2769), 2769 states have call predecessors, (2769), 2769 states have call successors, (2769) [2022-12-14 15:07:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11459 states to 11459 states and 18711 transitions. [2022-12-14 15:07:59,688 INFO L78 Accepts]: Start accepts. Automaton has 11459 states and 18711 transitions. Word has length 93 [2022-12-14 15:07:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:59,688 INFO L495 AbstractCegarLoop]: Abstraction has 11459 states and 18711 transitions. [2022-12-14 15:07:59,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:07:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 11459 states and 18711 transitions. [2022-12-14 15:07:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 15:07:59,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:59,705 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:07:59,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 15:07:59,706 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -514097486, now seen corresponding path program 1 times [2022-12-14 15:07:59,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:59,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248735539] [2022-12-14 15:07:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:59,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:07:59,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248735539] [2022-12-14 15:07:59,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248735539] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:59,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:59,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506269065] [2022-12-14 15:07:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:59,760 INFO L87 Difference]: Start difference. First operand 11459 states and 18711 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:08:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:00,715 INFO L93 Difference]: Finished difference Result 30321 states and 49848 transitions. [2022-12-14 15:08:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:00,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 94 [2022-12-14 15:08:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:00,787 INFO L225 Difference]: With dead ends: 30321 [2022-12-14 15:08:00,788 INFO L226 Difference]: Without dead ends: 20291 [2022-12-14 15:08:00,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:08:00,815 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 41 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:00,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 411 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:08:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20291 states. [2022-12-14 15:08:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20291 to 20286. [2022-12-14 15:08:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20286 states, 15454 states have (on average 1.5122945515724084) internal successors, (23371), 15457 states have internal predecessors, (23371), 4809 states have call successors, (4809), 22 states have call predecessors, (4809), 22 states have return successors, (4808), 4808 states have call predecessors, (4808), 4808 states have call successors, (4808) [2022-12-14 15:08:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20286 states to 20286 states and 32988 transitions. [2022-12-14 15:08:01,886 INFO L78 Accepts]: Start accepts. Automaton has 20286 states and 32988 transitions. Word has length 94 [2022-12-14 15:08:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:01,886 INFO L495 AbstractCegarLoop]: Abstraction has 20286 states and 32988 transitions. [2022-12-14 15:08:01,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:08:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 20286 states and 32988 transitions. [2022-12-14 15:08:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 15:08:01,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:01,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:01,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 15:08:01,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash 164620844, now seen corresponding path program 1 times [2022-12-14 15:08:01,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84142127] [2022-12-14 15:08:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:01,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:08:01,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:01,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84142127] [2022-12-14 15:08:01,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84142127] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:01,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:01,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:08:01,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268210723] [2022-12-14 15:08:01,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:01,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:01,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:01,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:01,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:08:01,955 INFO L87 Difference]: Start difference. First operand 20286 states and 32988 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:08:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:03,784 INFO L93 Difference]: Finished difference Result 55033 states and 89940 transitions. [2022-12-14 15:08:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:03,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 95 [2022-12-14 15:08:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:03,890 INFO L225 Difference]: With dead ends: 55033 [2022-12-14 15:08:03,890 INFO L226 Difference]: Without dead ends: 36731 [2022-12-14 15:08:03,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:08:03,933 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 39 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:03,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 411 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:08:03,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36731 states. [2022-12-14 15:08:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36731 to 36726. [2022-12-14 15:08:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36726 states, 28179 states have (on average 1.5016501650165017) internal successors, (42315), 28182 states have internal predecessors, (42315), 8524 states have call successors, (8524), 22 states have call predecessors, (8524), 22 states have return successors, (8523), 8523 states have call predecessors, (8523), 8523 states have call successors, (8523) [2022-12-14 15:08:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36726 states to 36726 states and 59362 transitions. [2022-12-14 15:08:05,707 INFO L78 Accepts]: Start accepts. Automaton has 36726 states and 59362 transitions. Word has length 95 [2022-12-14 15:08:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:05,707 INFO L495 AbstractCegarLoop]: Abstraction has 36726 states and 59362 transitions. [2022-12-14 15:08:05,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:08:05,707 INFO L276 IsEmpty]: Start isEmpty. Operand 36726 states and 59362 transitions. [2022-12-14 15:08:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 15:08:05,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:05,728 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:05,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 15:08:05,728 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash 811521106, now seen corresponding path program 1 times [2022-12-14 15:08:05,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:05,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157561429] [2022-12-14 15:08:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:05,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:08:05,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157561429] [2022-12-14 15:08:05,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157561429] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:05,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:05,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:08:05,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599288221] [2022-12-14 15:08:05,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:05,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:05,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:05,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:05,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:08:05,778 INFO L87 Difference]: Start difference. First operand 36726 states and 59362 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:08:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:09,346 INFO L93 Difference]: Finished difference Result 67650 states and 109521 transitions. [2022-12-14 15:08:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:09,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 96 [2022-12-14 15:08:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:09,519 INFO L225 Difference]: With dead ends: 67650 [2022-12-14 15:08:09,519 INFO L226 Difference]: Without dead ends: 67559 [2022-12-14 15:08:09,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:08:09,535 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 37 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:09,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 409 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:08:09,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67559 states. [2022-12-14 15:08:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67559 to 67554. [2022-12-14 15:08:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67554 states, 52208 states have (on average 1.4877221881703953) internal successors, (77671), 52211 states have internal predecessors, (77671), 15323 states have call successors, (15323), 22 states have call predecessors, (15323), 22 states have return successors, (15322), 15322 states have call predecessors, (15322), 15322 states have call successors, (15322) [2022-12-14 15:08:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67554 states to 67554 states and 108316 transitions. [2022-12-14 15:08:12,482 INFO L78 Accepts]: Start accepts. Automaton has 67554 states and 108316 transitions. Word has length 96 [2022-12-14 15:08:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:12,482 INFO L495 AbstractCegarLoop]: Abstraction has 67554 states and 108316 transitions. [2022-12-14 15:08:12,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:08:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 67554 states and 108316 transitions. [2022-12-14 15:08:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 15:08:12,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:12,504 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:12,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 15:08:12,505 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:12,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1923439957, now seen corresponding path program 1 times [2022-12-14 15:08:12,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:12,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400054136] [2022-12-14 15:08:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:12,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:08:13,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:13,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400054136] [2022-12-14 15:08:13,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400054136] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:13,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:13,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-12-14 15:08:13,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51194471] [2022-12-14 15:08:13,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:13,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 15:08:13,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 15:08:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-12-14 15:08:13,239 INFO L87 Difference]: Start difference. First operand 67554 states and 108316 transitions. Second operand has 19 states, 14 states have (on average 4.142857142857143) internal successors, (58), 16 states have internal predecessors, (58), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-12-14 15:08:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:17,772 INFO L93 Difference]: Finished difference Result 67688 states and 108490 transitions. [2022-12-14 15:08:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 15:08:17,773 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 4.142857142857143) internal successors, (58), 16 states have internal predecessors, (58), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 97 [2022-12-14 15:08:17,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:17,944 INFO L225 Difference]: With dead ends: 67688 [2022-12-14 15:08:17,944 INFO L226 Difference]: Without dead ends: 67668 [2022-12-14 15:08:17,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 15:08:17,959 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 387 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 2665 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:17,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 2665 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:08:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67668 states. [2022-12-14 15:08:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67668 to 67660. [2022-12-14 15:08:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67660 states, 52271 states have (on average 1.4873447992194524) internal successors, (77745), 52274 states have internal predecessors, (77745), 15352 states have call successors, (15352), 36 states have call predecessors, (15352), 36 states have return successors, (15352), 15351 states have call predecessors, (15352), 15350 states have call successors, (15352) [2022-12-14 15:08:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67660 states to 67660 states and 108449 transitions. [2022-12-14 15:08:22,295 INFO L78 Accepts]: Start accepts. Automaton has 67660 states and 108449 transitions. Word has length 97 [2022-12-14 15:08:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:22,295 INFO L495 AbstractCegarLoop]: Abstraction has 67660 states and 108449 transitions. [2022-12-14 15:08:22,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 4.142857142857143) internal successors, (58), 16 states have internal predecessors, (58), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-12-14 15:08:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 67660 states and 108449 transitions. [2022-12-14 15:08:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 15:08:22,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:22,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:22,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 15:08:22,320 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1544013027, now seen corresponding path program 1 times [2022-12-14 15:08:22,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:22,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867909251] [2022-12-14 15:08:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:22,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:08:23,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:23,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867909251] [2022-12-14 15:08:23,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867909251] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:23,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279644693] [2022-12-14 15:08:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:23,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:23,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:23,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:23,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:08:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:23,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 15:08:23,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:08:24,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:08:24,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279644693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:24,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:08:24,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [22] total 32 [2022-12-14 15:08:24,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058194474] [2022-12-14 15:08:24,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:24,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:08:24,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:24,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:08:24,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=922, Unknown=0, NotChecked=0, Total=992 [2022-12-14 15:08:24,260 INFO L87 Difference]: Start difference. First operand 67660 states and 108449 transitions. Second operand has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 8 states have internal predecessors, (63), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-12-14 15:08:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:28,211 INFO L93 Difference]: Finished difference Result 70857 states and 113508 transitions. [2022-12-14 15:08:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:08:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 8 states have internal predecessors, (63), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 103 [2022-12-14 15:08:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:28,408 INFO L225 Difference]: With dead ends: 70857 [2022-12-14 15:08:28,408 INFO L226 Difference]: Without dead ends: 70733 [2022-12-14 15:08:28,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 15:08:28,435 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 545 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:28,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 2117 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 15:08:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70733 states. [2022-12-14 15:08:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70733 to 70444. [2022-12-14 15:08:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70444 states, 54275 states have (on average 1.4853800092123446) internal successors, (80619), 54640 states have internal predecessors, (80619), 16099 states have call successors, (16099), 70 states have call predecessors, (16099), 69 states have return successors, (16099), 15737 states have call predecessors, (16099), 16095 states have call successors, (16099) [2022-12-14 15:08:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70444 states to 70444 states and 112817 transitions. [2022-12-14 15:08:32,897 INFO L78 Accepts]: Start accepts. Automaton has 70444 states and 112817 transitions. Word has length 103 [2022-12-14 15:08:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:32,897 INFO L495 AbstractCegarLoop]: Abstraction has 70444 states and 112817 transitions. [2022-12-14 15:08:32,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 8 states have internal predecessors, (63), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-12-14 15:08:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 70444 states and 112817 transitions. [2022-12-14 15:08:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 15:08:32,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:32,934 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:32,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:08:33,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 15:08:33,136 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:33,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1200399915, now seen corresponding path program 1 times [2022-12-14 15:08:33,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:33,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726368184] [2022-12-14 15:08:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:33,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:08:33,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:33,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726368184] [2022-12-14 15:08:33,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726368184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:33,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:33,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:08:33,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187967654] [2022-12-14 15:08:33,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:33,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:08:33,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:33,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:08:33,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:08:33,277 INFO L87 Difference]: Start difference. First operand 70444 states and 112817 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:08:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:37,378 INFO L93 Difference]: Finished difference Result 137317 states and 220366 transitions. [2022-12-14 15:08:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:08:37,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 111 [2022-12-14 15:08:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:37,569 INFO L225 Difference]: With dead ends: 137317 [2022-12-14 15:08:37,569 INFO L226 Difference]: Without dead ends: 70434 [2022-12-14 15:08:37,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:08:37,666 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 136 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:37,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 609 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:08:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70434 states. [2022-12-14 15:08:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70434 to 70418. [2022-12-14 15:08:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70418 states, 54253 states have (on average 1.4657622619947284) internal successors, (79522), 54616 states have internal predecessors, (79522), 16095 states have call successors, (16095), 70 states have call predecessors, (16095), 69 states have return successors, (16095), 15735 states have call predecessors, (16095), 16091 states have call successors, (16095) [2022-12-14 15:08:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70418 states to 70418 states and 111712 transitions. [2022-12-14 15:08:42,123 INFO L78 Accepts]: Start accepts. Automaton has 70418 states and 111712 transitions. Word has length 111 [2022-12-14 15:08:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:42,123 INFO L495 AbstractCegarLoop]: Abstraction has 70418 states and 111712 transitions. [2022-12-14 15:08:42,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:08:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 70418 states and 111712 transitions. [2022-12-14 15:08:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 15:08:42,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:42,168 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:42,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 15:08:42,168 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash 816402561, now seen corresponding path program 1 times [2022-12-14 15:08:42,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:42,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119205189] [2022-12-14 15:08:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:42,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 15:08:42,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:42,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119205189] [2022-12-14 15:08:42,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119205189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:42,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695022672] [2022-12-14 15:08:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:42,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:42,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:42,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:42,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:08:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:42,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-14 15:08:42,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:08:42,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:08:42,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695022672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:42,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:08:42,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [14] total 30 [2022-12-14 15:08:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749198788] [2022-12-14 15:08:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 15:08:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 15:08:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:08:42,972 INFO L87 Difference]: Start difference. First operand 70418 states and 111712 transitions. Second operand has 20 states, 14 states have (on average 4.857142857142857) internal successors, (68), 16 states have internal predecessors, (68), 11 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-12-14 15:08:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:47,099 INFO L93 Difference]: Finished difference Result 70614 states and 111957 transitions. [2022-12-14 15:08:47,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 15:08:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 4.857142857142857) internal successors, (68), 16 states have internal predecessors, (68), 11 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 117 [2022-12-14 15:08:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:47,282 INFO L225 Difference]: With dead ends: 70614 [2022-12-14 15:08:47,282 INFO L226 Difference]: Without dead ends: 70576 [2022-12-14 15:08:47,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=1783, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 15:08:47,305 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 564 mSDsluCounter, 3132 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:47,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 3371 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1966 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 15:08:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70576 states. [2022-12-14 15:08:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70576 to 70561. [2022-12-14 15:08:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70561 states, 54332 states have (on average 1.4653058970772288) internal successors, (79613), 54699 states have internal predecessors, (79613), 16135 states have call successors, (16135), 93 states have call predecessors, (16135), 93 states have return successors, (16136), 15771 states have call predecessors, (16136), 16130 states have call successors, (16136) [2022-12-14 15:08:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70561 states to 70561 states and 111884 transitions. [2022-12-14 15:08:51,466 INFO L78 Accepts]: Start accepts. Automaton has 70561 states and 111884 transitions. Word has length 117 [2022-12-14 15:08:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:51,467 INFO L495 AbstractCegarLoop]: Abstraction has 70561 states and 111884 transitions. [2022-12-14 15:08:51,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 4.857142857142857) internal successors, (68), 16 states have internal predecessors, (68), 11 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-12-14 15:08:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 70561 states and 111884 transitions. [2022-12-14 15:08:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 15:08:51,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:51,510 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:51,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:08:51,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 15:08:51,711 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1896972983, now seen corresponding path program 1 times [2022-12-14 15:08:51,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:51,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859516083] [2022-12-14 15:08:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:51,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:08:52,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:52,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859516083] [2022-12-14 15:08:52,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859516083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:52,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289169527] [2022-12-14 15:08:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:52,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:52,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:52,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:52,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96199706-bf85-4056-8955-a6a73a5c0e6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:08:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 180 conjunts are in the unsatisfiable core [2022-12-14 15:08:52,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:08:55,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:09:11,373 WARN L233 SmtUtils]: Spent 14.76s on a formula simplification. DAG size of input: 1080 DAG size of output: 67 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 15:09:35,858 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 10753 disjunctions. This might take some time... [2022-12-14 15:09:43,977 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 10753 disjunctions.