./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/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_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/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_c73ef60f-1b57-470a-9ef0-8b204846b676/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 80e9bbe10488e38c848fee2c8f87fc84d027f309ec95e867f80c828929ca07a3 --- 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 10:33:03,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:33:03,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:33:03,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:33:03,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:33:03,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:33:03,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:33:03,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:33:03,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:33:03,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:33:03,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:33:03,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:33:03,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:33:03,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:33:03,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:33:03,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:33:03,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:33:03,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:33:03,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:33:03,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:33:03,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:33:03,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:33:03,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:33:03,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:33:03,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:33:03,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:33:03,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:33:03,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:33:03,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:33:03,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:33:03,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:33:03,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:33:03,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:33:03,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:33:03,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:33:03,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:33:03,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:33:03,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:33:03,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:33:03,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:33:03,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:33:03,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:33:03,920 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:33:03,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:33:03,921 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:33:03,921 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:33:03,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:33:03,921 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:33:03,921 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:33:03,921 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:33:03,921 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:33:03,922 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:33:03,922 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:33:03,922 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:33:03,922 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:33:03,922 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:33:03,922 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:33:03,922 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:33:03,922 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:33:03,922 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:33:03,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:33:03,923 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:33:03,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:33:03,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:33:03,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:33:03,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:33:03,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:33:03,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:33:03,924 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:33:03,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:33:03,924 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:33:03,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:33:03,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:33:03,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:33:03,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:33:03,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:33:03,925 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:33:03,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:33:03,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:33:03,925 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:33:03,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:33:03,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:33:03,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:33:03,925 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_c73ef60f-1b57-470a-9ef0-8b204846b676/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80e9bbe10488e38c848fee2c8f87fc84d027f309ec95e867f80c828929ca07a3 [2022-12-14 10:33:04,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:33:04,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:33:04,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:33:04,140 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:33:04,141 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:33:04,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c [2022-12-14 10:33:06,712 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:33:06,950 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:33:06,951 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c [2022-12-14 10:33:06,966 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/data/4ff65f023/1adf9422f4c64766bf0fb4de57c44e81/FLAGd79087d0d [2022-12-14 10:33:06,977 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/data/4ff65f023/1adf9422f4c64766bf0fb4de57c44e81 [2022-12-14 10:33:06,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:33:06,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:33:06,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:33:06,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:33:06,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:33:06,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:33:06" (1/1) ... [2022-12-14 10:33:06,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@360e3cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:06, skipping insertion in model container [2022-12-14 10:33:06,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:33:06" (1/1) ... [2022-12-14 10:33:06,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:33:07,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:33:07,220 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,225 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,235 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,339 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,340 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,342 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,372 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,377 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_c73ef60f-1b57-470a-9ef0-8b204846b676/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c[64112,64125] [2022-12-14 10:33:07,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:33:07,389 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:33:07,400 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,401 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,405 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,435 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,436 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,437 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,449 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-14 10:33:07,452 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_c73ef60f-1b57-470a-9ef0-8b204846b676/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c[64112,64125] [2022-12-14 10:33:07,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:33:07,471 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:33:07,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07 WrapperNode [2022-12-14 10:33:07,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:33:07,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:33:07,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:33:07,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:33:07,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,523 INFO L138 Inliner]: procedures = 131, calls = 218, calls flagged for inlining = 60, calls inlined = 50, statements flattened = 909 [2022-12-14 10:33:07,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:33:07,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:33:07,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:33:07,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:33:07,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,552 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:33:07,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:33:07,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:33:07,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:33:07,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (1/1) ... [2022-12-14 10:33:07,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:33:07,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:33:07,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:33:07,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:33:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-12-14 10:33:07,624 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-12-14 10:33:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-12-14 10:33:07,624 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-12-14 10:33:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-12-14 10:33:07,624 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-12-14 10:33:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-12-14 10:33:07,625 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-12-14 10:33:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-12-14 10:33:07,625 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-12-14 10:33:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-12-14 10:33:07,625 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-12-14 10:33:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-12-14 10:33:07,626 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-12-14 10:33:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-12-14 10:33:07,626 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-12-14 10:33:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-12-14 10:33:07,626 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-12-14 10:33:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-12-14 10:33:07,626 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-12-14 10:33:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-12-14 10:33:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-12-14 10:33:07,627 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-12-14 10:33:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-12-14 10:33:07,627 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-12-14 10:33:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:33:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-12-14 10:33:07,627 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-12-14 10:33:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-12-14 10:33:07,628 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-12-14 10:33:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-12-14 10:33:07,628 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-12-14 10:33:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-12-14 10:33:07,628 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-12-14 10:33:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-12-14 10:33:07,628 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-12-14 10:33:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-12-14 10:33:07,629 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-12-14 10:33:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-12-14 10:33:07,629 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-12-14 10:33:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-12-14 10:33:07,629 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-12-14 10:33:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-12-14 10:33:07,629 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-12-14 10:33:07,630 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-12-14 10:33:07,630 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-12-14 10:33:07,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:33:07,630 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-12-14 10:33:07,630 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-12-14 10:33:07,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:33:07,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:33:07,777 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:33:07,778 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:33:08,332 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:33:08,568 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:33:08,569 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 10:33:08,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:33:08 BoogieIcfgContainer [2022-12-14 10:33:08,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:33:08,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:33:08,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:33:08,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:33:08,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:33:06" (1/3) ... [2022-12-14 10:33:08,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e74e282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:33:08, skipping insertion in model container [2022-12-14 10:33:08,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:33:07" (2/3) ... [2022-12-14 10:33:08,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e74e282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:33:08, skipping insertion in model container [2022-12-14 10:33:08,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:33:08" (3/3) ... [2022-12-14 10:33:08,576 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec4_product30.cil.c [2022-12-14 10:33:08,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:33:08,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:33:08,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:33:08,631 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;@10abeb54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:33:08,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:33:08,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 111 states have (on average 1.3333333333333333) internal successors, (148), 115 states have internal predecessors, (148), 53 states have call successors, (53), 23 states have call predecessors, (53), 23 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-12-14 10:33:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 10:33:08,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:33:08,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-14 10:33:08,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:33:08,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:33:08,648 INFO L85 PathProgramCache]: Analyzing trace with hash 288916328, now seen corresponding path program 1 times [2022-12-14 10:33:08,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:33:08,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660714283] [2022-12-14 10:33:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:33:08,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:33:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:33:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:33:08,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:33:08,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660714283] [2022-12-14 10:33:08,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660714283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:33:08,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:33:08,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:33:08,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407065165] [2022-12-14 10:33:08,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:33:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 10:33:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:33:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 10:33:08,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:33:08,895 INFO L87 Difference]: Start difference. First operand has 189 states, 111 states have (on average 1.3333333333333333) internal successors, (148), 115 states have internal predecessors, (148), 53 states have call successors, (53), 23 states have call predecessors, (53), 23 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:33:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:33:08,994 INFO L93 Difference]: Finished difference Result 295 states and 386 transitions. [2022-12-14 10:33:08,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 10:33:08,996 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 68 [2022-12-14 10:33:08,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:33:09,003 INFO L225 Difference]: With dead ends: 295 [2022-12-14 10:33:09,003 INFO L226 Difference]: Without dead ends: 186 [2022-12-14 10:33:09,006 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 10:33:09,009 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:33:09,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 217 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:33:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-12-14 10:33:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-12-14 10:33:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 112 states have internal predecessors, (142), 53 states have call successors, (53), 23 states have call predecessors, (53), 23 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-14 10:33:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 247 transitions. [2022-12-14 10:33:09,048 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 247 transitions. Word has length 68 [2022-12-14 10:33:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:33:09,049 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 247 transitions. [2022-12-14 10:33:09,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:33:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 247 transitions. [2022-12-14 10:33:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:33:09,051 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:33:09,051 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-14 10:33:09,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:33:09,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:33:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:33:09,052 INFO L85 PathProgramCache]: Analyzing trace with hash -891086816, now seen corresponding path program 1 times [2022-12-14 10:33:09,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:33:09,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234266362] [2022-12-14 10:33:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:33:09,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:33:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:33:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:33:09,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:33:09,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234266362] [2022-12-14 10:33:09,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234266362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:33:09,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:33:09,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:33:09,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452871833] [2022-12-14 10:33:09,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:33:09,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:33:09,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:33:09,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:33:09,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:33:09,180 INFO L87 Difference]: Start difference. First operand 186 states and 247 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:33:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:33:09,272 INFO L93 Difference]: Finished difference Result 291 states and 374 transitions. [2022-12-14 10:33:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:33:09,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 69 [2022-12-14 10:33:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:33:09,273 INFO L225 Difference]: With dead ends: 291 [2022-12-14 10:33:09,274 INFO L226 Difference]: Without dead ends: 188 [2022-12-14 10:33:09,274 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 10:33:09,275 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 0 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:33:09,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 427 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:33:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-12-14 10:33:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-12-14 10:33:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 114 states have internal predecessors, (144), 53 states have call successors, (53), 23 states have call predecessors, (53), 23 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-14 10:33:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 249 transitions. [2022-12-14 10:33:09,288 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 249 transitions. Word has length 69 [2022-12-14 10:33:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:33:09,288 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 249 transitions. [2022-12-14 10:33:09,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:33:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 249 transitions. [2022-12-14 10:33:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 10:33:09,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:33:09,290 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 10:33:09,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:33:09,291 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:33:09,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:33:09,291 INFO L85 PathProgramCache]: Analyzing trace with hash -465995937, now seen corresponding path program 1 times [2022-12-14 10:33:09,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:33:09,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469699231] [2022-12-14 10:33:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:33:09,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:33:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:33:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:33:09,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:33:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469699231] [2022-12-14 10:33:09,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469699231] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:33:09,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:33:09,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:33:09,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445696381] [2022-12-14 10:33:09,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:33:09,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:33:09,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:33:09,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:33:09,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:33:09,373 INFO L87 Difference]: Start difference. First operand 188 states and 249 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:33:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:33:09,469 INFO L93 Difference]: Finished difference Result 406 states and 557 transitions. [2022-12-14 10:33:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:33:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 74 [2022-12-14 10:33:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:33:09,472 INFO L225 Difference]: With dead ends: 406 [2022-12-14 10:33:09,472 INFO L226 Difference]: Without dead ends: 236 [2022-12-14 10:33:09,474 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 10:33:09,475 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 57 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:33:09,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 439 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:33:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-12-14 10:33:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 231. [2022-12-14 10:33:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 143 states have (on average 1.3776223776223777) internal successors, (197), 146 states have internal predecessors, (197), 64 states have call successors, (64), 23 states have call predecessors, (64), 23 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-12-14 10:33:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 324 transitions. [2022-12-14 10:33:09,499 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 324 transitions. Word has length 74 [2022-12-14 10:33:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:33:09,499 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 324 transitions. [2022-12-14 10:33:09,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:33:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 324 transitions. [2022-12-14 10:33:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 10:33:09,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:33:09,502 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 10:33:09,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:33:09,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:33:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:33:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1704469630, now seen corresponding path program 1 times [2022-12-14 10:33:09,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:33:09,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308079684] [2022-12-14 10:33:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:33:09,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:33:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:33:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:33:09,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:33:09,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308079684] [2022-12-14 10:33:09,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308079684] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:33:09,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332579074] [2022-12-14 10:33:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:33:09,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:33:09,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:33:09,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:33:09,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:33:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:33:09,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:33:09,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:33:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:33:09,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:33:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:33:09,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332579074] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:33:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2128210521] [2022-12-14 10:33:10,007 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-12-14 10:33:10,008 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:33:10,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:33:10,015 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:33:10,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:33:49,315 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 439 for LOIs [2022-12-14 10:33:49,636 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-12-14 10:33:49,963 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 477 for LOIs [2022-12-14 10:34:29,865 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 447 for LOIs [2022-12-14 10:34:30,180 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 475 for LOIs [2022-12-14 10:35:04,832 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 436 for LOIs [2022-12-14 10:35:05,117 INFO L197 IcfgInterpreter]: Interpreting procedure findPublicKey with input of size 249 for LOIs [2022-12-14 10:35:05,193 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 254 for LOIs [2022-12-14 10:35:05,242 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 449 for LOIs [2022-12-14 10:35:05,916 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 251 for LOIs [2022-12-14 10:35:05,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:35:53,601 WARN L233 SmtUtils]: Spent 12.09s on a formula simplification. DAG size of input: 590 DAG size of output: 462 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:36:01,217 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 592 DAG size of output: 345 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:37:24,900 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 604 DAG size of output: 461 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:37:30,634 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 604 DAG size of output: 461 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:37:36,899 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 606 DAG size of output: 463 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:37:43,144 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 608 DAG size of output: 465 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:37:43,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3210#(and (= |old(~__ste_email_encryptionKey0~0)| 0) (<= 1 |outgoing_outgoing__wrappee__Keys_~msg#1|) (<= |outgoing_outgoing__wrappee__AutoResponder_~receiver~0#1| 2) (<= 0 ~__ste_email_encryptionKey1~0) (= ~__SELECTED_FEATURE_Sign~0 0) (= ~__ste_client_outbuffer3~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp~2#1| 2) (<= 1 |outgoing___utac_acc__SignForward_spec__1_~client#1|) (<= |outgoing___utac_acc__SignForward_spec__1_~msg#1| 1) (<= 1 |outgoing_mail_#in~client#1|) (<= |outgoing_mail_#in~msg#1| 1) (<= 0 (+ 2147483648 |outgoing_getClientId_#res#1|)) (= ~__ste_Client_counter~0 0) (<= ~__ste_email_encryptionKey1~0 0) (<= ~__ste_email_isSignatureVerified1~0 0) (<= |old(~__ste_email_to0~0)| 2) (= ~__ste_Client_AddressBook2_Alias0~0 0) (= 0 ~__ste_email_subject0~0.base) (<= |outgoing_outgoing__wrappee__Keys_~tmp~1#1| 2147483647) (<= 1 |outgoing_sign_~client#1|) (<= 1 |outgoing_mail_~msg#1|) (<= ~__ste_Client_Keyring0_User0~0 0) (<= |outgoing_mail_~__utac__ad__arg2~0#1| 1) (<= |outgoing_sign_~privkey~1#1| 2147483647) (<= |outgoing_#in~msg#1| 1) (<= 0 ~__ste_Client_Keyring0_PublicKey2~0) (<= 0 ~__ste_ClientAddressBook_size0~0) (<= 2 ~rjh~0) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_~client#1|) (<= |outgoing___utac_acc__SignForward_spec__1_~client#1| 1) (<= 0 ~__SELECTED_FEATURE_Encrypt~0) (<= 0 ~__ste_client_outbuffer0~0) (<= |old(~queued_client~0)| 0) (<= ~__ste_Client_Keyring2_PublicKey2~0 0) (<= 0 |old(~__ste_email_encryptionKey1~0)|) (<= |outgoing_sign_~msg#1| 1) (<= 2 |old(~__ste_email_to0~0)|) (<= 0 |old(~queued_message~0)|) (<= ~chuck~0 3) (<= 0 ~__ste_client_outbuffer1~0) (<= 0 ~__ste_ClientAddressBook_size1~0) (<= ~__ste_client_idCounter2~0 3) (<= ~queued_message~0 0) (<= |old(~__ste_email_from0~0)| 0) (<= ~__ste_email_isSignatureVerified0~0 0) (<= ~__ste_client_name0~0.base 0) (<= 0 ~__ste_Client_AddressBook0_Alias1~0) (= ~__ste_Client_AddressBook1_Address2~0 0) (<= ~__ste_email_from0~0 2147483647) (<= 0 ~__ste_Client_Keyring0_User0~0) (<= 1 |outgoing___utac_acc__SignForward_spec__1_#in~client#1|) (<= |outgoing_sign_~client#1| 1) (<= 0 ~__SELECTED_FEATURE_AutoResponder~0) (= ~__ste_email_body0~0.offset 0) (<= ~__SELECTED_FEATURE_Keys~0 0) (<= 1 |outgoing_~client#1|) (<= 0 ~__ste_email_isSigned1~0) (<= ~__SELECTED_FEATURE_Decrypt~0 0) (<= 0 (+ ~__ste_email_from0~0 2147483648)) (= ~__ste_Client_Keyring0_User2~0 0) (<= |old(~__ste_email_isSigned0~0)| 0) (<= ~__ste_Client_Keyring1_PublicKey0~0 0) (<= |old(~__ste_email_isEncrypted0~0)| 0) (= ~__ste_Client_Keyring0_User1~0 0) (= ~__ste_Client_AddressBook1_Alias1~0 0) (= ~__ste_client_name1~0.offset 0) (<= ~__GUIDSL_NON_TERMINAL_main~0 0) (<= |outgoing_getClientId_#res#1| 2147483647) (<= |outgoing___utac_acc__SignForward_spec__1_#in~client#1| 1) (<= ~__ste_Client_AddressBook2_Address0~0 0) (<= ~__SELECTED_FEATURE_AutoResponder~0 0) (<= ~__ste_email_id0~0 0) (<= 0 ~__ste_client_name2~0.offset) (= ~head~0.offset 0) (<= ~__GUIDSL_ROOT_PRODUCTION~0 0) (<= ~__ste_Client_AddressBook2_Alias1~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_~client#1|) (<= 0 ~__GUIDSL_ROOT_PRODUCTION~0) (<= ~__ste_client_autoResponse1~0 1) (<= ~__ste_Email_counter~0 0) (<= ~__ste_Client_Keyring2_User2~0 0) (<= ~__ste_email_body1~0.offset 0) (<= ~__ste_client_privateKey2~0 789) (<= 0 ~__SELECTED_FEATURE_Decrypt~0) (<= |outgoing_sign_#in~client#1| 1) (<= |old(~queued_message~0)| 0) (<= 0 |outgoing___utac_acc__SignForward_spec__1_~tmp___0~8#1|) (<= 1 |old(~queue_empty~0)|) (<= ~queue_empty~0 1) (<= 0 ~__ste_Client_AddressBook2_Alias1~0) (<= 0 ~__ste_Client_Keyring2_User2~0) (<= 1 |outgoing_getClientId_~handle#1|) (<= 0 ~__ste_Client_Keyring1_User2~0) (<= 0 |old(~__ste_email_isEncrypted0~0)|) (<= 0 (+ ~__ste_email_signKey0~0 2147483648)) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1|) (<= 0 |outgoing_outgoing__wrappee__AutoResponder_~tmp___0~0#1|) (<= 0 ~__ste_email_isEncrypted1~0) (<= ~__ste_email_signKey0~0 2147483647) (<= 0 |old(~__ste_email_from0~0)|) (<= |#NULL.offset| 0) (<= 0 ~__ste_Client_Keyring1_User0~0) (<= 1 |outgoing___utac_acc__SignForward_spec__1_~msg#1|) (<= 0 ~__SELECTED_FEATURE_AddressBook~0) (= ~__ste_Client_Keyring0_PublicKey1~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp___0~0#1| 0) (= ~__SELECTED_FEATURE_Forward~0 0) (<= |outgoing___utac_acc__SignForward_spec__1_#in~msg#1| 1) (<= 0 ~__ste_email_isEncrypted0~0) (<= 0 |old(~__ste_email_signKey0~0)|) (<= 1 |outgoing_mail_#in~msg#1|) (<= ~__ste_Client_Keyring0_PublicKey2~0 0) (<= ~__ste_client_idCounter0~0 2147483647) (= ~__ste_Client_Keyring2_PublicKey1~0 0) (<= 0 ~__ste_email_id1~0) (<= ~__ste_Client_AddressBook0_Address1~0 0) (= ~__ste_email_body0~0.base 0) (<= ~__ste_email_isSigned0~0 1) (<= ~__ste_email_isEncrypted0~0 0) (<= 0 (+ |outgoing_sign_~tmp~8#1| 2147483648)) (= ~__ste_Client_AddressBook0_Alias0~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~msg#1|) (<= 0 ~__ste_Client_AddressBook2_Address1~0) (<= 0 ~__ste_client_name0~0.offset) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_~tmp~1#1| 2147483648)) (<= ~__ste_Client_Keyring0_PublicKey0~0 0) (<= ~__ste_client_name1~0.base 0) (<= ~__ste_client_autoResponse0~0 0) (<= ~__SELECTED_FEATURE_AddressBook~0 0) (<= ~__ste_Client_Keyring1_PublicKey2~0 0) (<= 0 ~__ste_Client_Keyring0_PublicKey0~0) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_#in~client#1|) (<= |outgoing_mail_~__utac__ad__arg1~0#1| 1) (<= 1 |outgoing_mail_~__utac__ad__arg1~0#1|) (<= ~__ste_client_forwardReceiver3~0 0) (<= 3 ~__ste_client_idCounter2~0) (= ~__ste_Client_AddressBook2_Address2~0 0) (<= ~__ste_ClientAddressBook_size0~0 0) (<= 0 ~__ste_Client_Keyring1_PublicKey2~0) (<= ~__ste_Client_AddressBook0_Address0~0 0) (<= 0 ~__ste_client_name0~0.base) (<= 0 ~__ste_email_signKey1~0) (<= 0 ~__ste_email_body1~0.offset) (<= 1 ~queue_empty~0) (<= ~__ste_email_signKey1~0 0) (<= 0 ~__ste_client_forwardReceiver3~0) (<= ~__ste_client_name2~0.offset 0) (<= ~__ste_email_isSigned1~0 0) (<= ~__SELECTED_FEATURE_Encrypt~0 0) (<= 0 ~__ste_Email_counter~0) (<= ~__ste_email_subject0~0.offset 0) (<= |old(~__ste_email_signKey0~0)| 0) (<= 0 ~__ste_client_autoResponse0~0) (<= 0 (+ |outgoing_getClientId_~retValue_acc~28#1| 2147483648)) (<= 0 ~__ste_Client_AddressBook0_Alias2~0) (<= 0 ~queued_message~0) (<= 0 |old(~__ste_email_isSignatureVerified0~0)|) (<= 0 ~__ste_email_isSignatureVerified1~0) (<= |outgoing_outgoing__wrappee__Keys_~client#1| 1) (<= 789 ~__ste_client_privateKey2~0) (<= ~__SELECTED_FEATURE_Verify~0 0) (<= 1 |outgoing_sign_#in~client#1|) (<= |outgoing_getClientId_#in~handle#1| 1) (<= 1 |outgoing_sign_~msg#1|) (<= ~__ste_ClientKeyring_size1~0 0) (<= ~__ste_Client_Keyring1_User2~0 0) (<= |outgoing___utac_acc__SignForward_spec__1_~tmp___0~8#1| 1) (<= 1 |outgoing___utac_acc__SignForward_spec__1_#in~msg#1|) (<= 0 ~head~0.base) (<= 1 |outgoing_~msg#1|) (= ~__SELECTED_FEATURE_Base~0 0) (<= ~__ste_Client_AddressBook1_Alias2~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~client#1| 1) (<= 0 ~__ste_Client_AddressBook0_Address2~0) (= ~__ste_client_forwardReceiver0~0 0) (<= 0 |old(~__ste_email_isSigned0~0)|) (<= |outgoing_mail_~client#1| 1) (= ~__ste_Client_Keyring2_User0~0 0) (<= 0 ~__ste_email_subject0~0.offset) (= |outgoing_outgoing__wrappee__AutoResponder_~pubkey~0#1| 0) (<= 0 ~__ste_Client_AddressBook1_Alias0~0) (= ~__ste_Client_Keyring1_PublicKey1~0 0) (<= 0 ~queued_client~0) (<= 0 ~__SELECTED_FEATURE_Keys~0) (<= ~__ste_Client_AddressBook1_Alias0~0 0) (<= 0 ~__ste_Client_Keyring1_PublicKey0~0) (= ~__ste_Client_Keyring2_PublicKey0~0 0) (<= 0 ~__ste_email_isSignatureVerified0~0) (= ~__ste_Client_AddressBook1_Address0~0 0) (<= 0 ~__ste_ClientKeyring_size1~0) (<= |outgoing_sign_~tmp~8#1| 2147483647) (<= 0 ~__ste_client_forwardReceiver2~0) (= ~__ste_client_name2~0.base 0) (<= 0 ~__ste_Client_AddressBook0_Address1~0) (<= |outgoing_mail_~msg#1| 1) (<= 0 |old(~queued_client~0)|) (<= ~__ste_email_encryptionKey0~0 0) (<= |old(~__ste_email_encryptionKey1~0)| 0) (= ~__ste_email_subject1~0.base 0) (<= ~__ste_ClientKeyring_size0~0 0) (<= ~__ste_email_id1~0 0) (<= |old(~queue_empty~0)| 1) (<= 0 ~__ste_Client_AddressBook0_Address0~0) (<= ~__ste_Client_Keyring1_User0~0 0) (<= |outgoing_mail_#in~client#1| 1) (<= ~__ste_Client_AddressBook0_Alias2~0 0) (<= |outgoing_outgoing__wrappee__Keys_#in~client#1| 1) (<= ~__ste_Client_AddressBook0_Address2~0 0) (<= 1 ~__ste_client_autoResponse1~0) (<= ~__ste_client_outbuffer0~0 0) (<= 2 |outgoing_outgoing__wrappee__AutoResponder_~receiver~0#1|) (<= ~head~0.base 0) (<= ~__ste_client_forwardReceiver1~0 0) (= ~__ste_Client_Keyring1_User1~0 0) (<= |outgoing_sign_#in~msg#1| 1) (<= |old(~__ste_email_isSigned1~0)| 0) (= ~__ste_Client_AddressBook2_Alias2~0 0) (<= |outgoing_#in~client#1| 1) (<= 0 (+ |outgoing_sign_~privkey~1#1| 2147483648)) (<= ~__ste_Client_Keyring2_User1~0 0) (<= 0 ~__ste_email_isSigned0~0) (<= 0 ~__SELECTED_FEATURE_Verify~0) (<= 0 ~__ste_Client_AddressBook1_Alias2~0) (<= 0 ~__ste_client_autoResponse2~0) (= ~__ste_email_subject1~0.offset 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1| 1) (<= 0 ~__ste_Client_AddressBook2_Address0~0) (<= 0 ~__ste_Client_Keyring2_User1~0) (<= |outgoing_~msg#1| 1) (<= |outgoing_outgoing__wrappee__AutoResponder_~client#1| 1) (= ~__ste_Client_AddressBook1_Address1~0 0) (<= |outgoing_outgoing__wrappee__Keys_~msg#1| 1) (<= ~__ste_client_name0~0.offset 0) (<= |outgoing_getClientId_~retValue_acc~28#1| 2147483647) (<= |outgoing_outgoing__wrappee__AutoResponder_~msg#1| 1) (<= 0 ~__ste_ClientKeyring_size0~0) (<= ~__ste_email_isEncrypted1~0 0) (= |old(~__ste_email_isEncrypted1~0)| 0) (<= 1 |outgoing_getClientId_#in~handle#1|) (<= |old(~__ste_email_isSignatureVerified0~0)| 0) (<= 0 |#NULL.offset|) (<= |old(~__ste_email_isSignatureVerified1~0)| 0) (<= ~rjh~0 2) (<= |outgoing_getClientId_~handle#1| 1) (<= 1 |outgoing_sign_#in~msg#1|) (<= 1 |outgoing_#in~client#1|) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_~msg#1|) (<= 2 |outgoing_outgoing__wrappee__AutoResponder_~tmp~2#1|) (<= |outgoing_~client#1| 1) (<= 1 |outgoing_#in~msg#1|) (<= ~__ste_Client_AddressBook0_Alias1~0 0) (<= 0 ~__ste_client_forwardReceiver1~0) (<= 1 |outgoing_mail_~__utac__ad__arg2~0#1|) (<= 0 ~__ste_Client_Keyring2_PublicKey2~0) (<= 0 |old(~__ste_email_isSignatureVerified1~0)|) (<= ~__ste_Client_AddressBook2_Address1~0 0) (= ~__ste_client_outbuffer2~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~client#1|) (<= ~bob~0 1) (<= 0 |old(~__ste_email_isSigned1~0)|) (<= 0 ~__GUIDSL_NON_TERMINAL_main~0) (<= |old(~__ste_email_signKey1~0)| 0) (<= 0 (+ ~__ste_client_idCounter0~0 2147483648)) (<= ~__ste_client_forwardReceiver2~0 0) (<= 2 ~__ste_email_to0~0) (<= 0 |#StackHeapBarrier|) (<= ~__ste_email_to0~0 2) (<= 1 |outgoing_mail_~client#1|) (= ~__ste_ClientAddressBook_size2~0 0) (<= 3 ~chuck~0) (= |outgoing___utac_acc__SignForward_spec__1_~tmp~23#1| 0) (<= ~__ste_client_autoResponse2~0 0) (= ~__ste_email_body1~0.base 0) (<= 1 ~bob~0) (<= ~__ste_client_outbuffer1~0 0) (= ~__ste_ClientKeyring_size2~0 0) (<= ~__ste_ClientAddressBook_size1~0 0) (<= 0 ~__ste_client_name1~0.base) (<= 0 |old(~__ste_email_signKey1~0)|) (<= 0 ~__ste_email_id0~0) (<= 0 ~__ste_email_encryptionKey0~0) (= |#NULL.base| 0) (<= |outgoing_outgoing__wrappee__Keys_#in~msg#1| 1) (<= ~queued_client~0 0))' at error location [2022-12-14 10:37:43,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:37:43,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:37:43,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 10:37:43,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432972444] [2022-12-14 10:37:43,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:37:43,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:37:43,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:43,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:37:43,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3376, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 10:37:43,158 INFO L87 Difference]: Start difference. First operand 231 states and 324 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 10:37:43,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:43,343 INFO L93 Difference]: Finished difference Result 584 states and 876 transitions. [2022-12-14 10:37:43,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:37:43,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 75 [2022-12-14 10:37:43,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:43,350 INFO L225 Difference]: With dead ends: 584 [2022-12-14 10:37:43,350 INFO L226 Difference]: Without dead ends: 481 [2022-12-14 10:37:43,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 157.1s TimeCoverageRelationStatistics Valid=164, Invalid=3376, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 10:37:43,355 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 214 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:43,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 826 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-12-14 10:37:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 466. [2022-12-14 10:37:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 314 states have (on average 1.5063694267515924) internal successors, (473), 317 states have internal predecessors, (473), 128 states have call successors, (128), 23 states have call predecessors, (128), 23 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-12-14 10:37:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 728 transitions. [2022-12-14 10:37:43,387 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 728 transitions. Word has length 75 [2022-12-14 10:37:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:43,387 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 728 transitions. [2022-12-14 10:37:43,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 10:37:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 728 transitions. [2022-12-14 10:37:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 10:37:43,391 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:43,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-14 10:37:43,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:37:43,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:37:43,593 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:43,594 INFO L85 PathProgramCache]: Analyzing trace with hash 537406349, now seen corresponding path program 1 times [2022-12-14 10:37:43,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:43,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529662764] [2022-12-14 10:37:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:43,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:37:43,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529662764] [2022-12-14 10:37:43,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529662764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:43,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:37:43,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:37:43,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786769853] [2022-12-14 10:37:43,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:43,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:37:43,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:37:43,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:37:43,724 INFO L87 Difference]: Start difference. First operand 466 states and 728 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:43,816 INFO L93 Difference]: Finished difference Result 1137 states and 1814 transitions. [2022-12-14 10:37:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:37:43,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 81 [2022-12-14 10:37:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:43,821 INFO L225 Difference]: With dead ends: 1137 [2022-12-14 10:37:43,821 INFO L226 Difference]: Without dead ends: 703 [2022-12-14 10:37:43,823 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 10:37:43,824 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 55 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:43,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 449 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-12-14 10:37:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 698. [2022-12-14 10:37:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 482 states have (on average 1.5269709543568464) internal successors, (736), 485 states have internal predecessors, (736), 192 states have call successors, (192), 23 states have call predecessors, (192), 23 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-12-14 10:37:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1119 transitions. [2022-12-14 10:37:43,868 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1119 transitions. Word has length 81 [2022-12-14 10:37:43,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:43,868 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 1119 transitions. [2022-12-14 10:37:43,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:43,869 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1119 transitions. [2022-12-14 10:37:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 10:37:43,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:43,874 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-14 10:37:43,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:37:43,874 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1355399377, now seen corresponding path program 1 times [2022-12-14 10:37:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:43,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152377095] [2022-12-14 10:37:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:37:43,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:43,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152377095] [2022-12-14 10:37:43,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152377095] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:43,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:37:43,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:37:43,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168992608] [2022-12-14 10:37:43,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:43,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:37:43,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:43,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:37:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:37:43,965 INFO L87 Difference]: Start difference. First operand 698 states and 1119 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:44,074 INFO L93 Difference]: Finished difference Result 1694 states and 2757 transitions. [2022-12-14 10:37:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:37:44,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-12-14 10:37:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:44,081 INFO L225 Difference]: With dead ends: 1694 [2022-12-14 10:37:44,081 INFO L226 Difference]: Without dead ends: 1058 [2022-12-14 10:37:44,083 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 10:37:44,083 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 53 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:44,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 438 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-12-14 10:37:44,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1053. [2022-12-14 10:37:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 742 states have (on average 1.536388140161725) internal successors, (1140), 745 states have internal predecessors, (1140), 287 states have call successors, (287), 23 states have call predecessors, (287), 23 states have return successors, (286), 286 states have call predecessors, (286), 286 states have call successors, (286) [2022-12-14 10:37:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1713 transitions. [2022-12-14 10:37:44,140 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1713 transitions. Word has length 82 [2022-12-14 10:37:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:44,141 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 1713 transitions. [2022-12-14 10:37:44,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1713 transitions. [2022-12-14 10:37:44,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 10:37:44,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:44,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-14 10:37:44,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:37:44,148 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:44,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:44,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1069323355, now seen corresponding path program 1 times [2022-12-14 10:37:44,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:44,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638289959] [2022-12-14 10:37:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:44,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:37:44,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:44,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638289959] [2022-12-14 10:37:44,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638289959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:44,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:37:44,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:37:44,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047069970] [2022-12-14 10:37:44,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:44,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:37:44,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:44,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:37:44,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:37:44,236 INFO L87 Difference]: Start difference. First operand 1053 states and 1713 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:44,379 INFO L93 Difference]: Finished difference Result 2492 states and 4101 transitions. [2022-12-14 10:37:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:37:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2022-12-14 10:37:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:44,385 INFO L225 Difference]: With dead ends: 2492 [2022-12-14 10:37:44,385 INFO L226 Difference]: Without dead ends: 1581 [2022-12-14 10:37:44,387 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 10:37:44,388 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 51 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:44,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 430 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2022-12-14 10:37:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1576. [2022-12-14 10:37:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1142 states have (on average 1.542907180385289) internal successors, (1762), 1145 states have internal predecessors, (1762), 410 states have call successors, (410), 23 states have call predecessors, (410), 23 states have return successors, (409), 409 states have call predecessors, (409), 409 states have call successors, (409) [2022-12-14 10:37:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2581 transitions. [2022-12-14 10:37:44,448 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2581 transitions. Word has length 83 [2022-12-14 10:37:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:44,448 INFO L495 AbstractCegarLoop]: Abstraction has 1576 states and 2581 transitions. [2022-12-14 10:37:44,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2581 transitions. [2022-12-14 10:37:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 10:37:44,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:44,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-14 10:37:44,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:37:44,453 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:44,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1289406926, now seen corresponding path program 1 times [2022-12-14 10:37:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:44,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339240460] [2022-12-14 10:37:44,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:44,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:37:44,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:44,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339240460] [2022-12-14 10:37:44,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339240460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:44,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:37:44,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:37:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238495411] [2022-12-14 10:37:44,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:44,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:37:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:37:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:37:44,509 INFO L87 Difference]: Start difference. First operand 1576 states and 2581 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:44,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:44,679 INFO L93 Difference]: Finished difference Result 3702 states and 6129 transitions. [2022-12-14 10:37:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:37:44,679 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 84 [2022-12-14 10:37:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:44,686 INFO L225 Difference]: With dead ends: 3702 [2022-12-14 10:37:44,686 INFO L226 Difference]: Without dead ends: 2405 [2022-12-14 10:37:44,689 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 10:37:44,689 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 49 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:44,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 430 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2022-12-14 10:37:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2400. [2022-12-14 10:37:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 1787 states have (on average 1.5467263570229435) internal successors, (2764), 1790 states have internal predecessors, (2764), 589 states have call successors, (589), 23 states have call predecessors, (589), 23 states have return successors, (588), 588 states have call predecessors, (588), 588 states have call successors, (588) [2022-12-14 10:37:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3941 transitions. [2022-12-14 10:37:44,787 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3941 transitions. Word has length 84 [2022-12-14 10:37:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:44,788 INFO L495 AbstractCegarLoop]: Abstraction has 2400 states and 3941 transitions. [2022-12-14 10:37:44,788 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3941 transitions. [2022-12-14 10:37:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 10:37:44,793 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:44,793 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 10:37:44,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:37:44,793 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash 863712599, now seen corresponding path program 1 times [2022-12-14 10:37:44,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:44,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593743020] [2022-12-14 10:37:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:44,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:37:44,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:44,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593743020] [2022-12-14 10:37:44,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593743020] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:44,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:37:44,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:37:44,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752641831] [2022-12-14 10:37:44,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:44,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:37:44,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:37:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:37:44,847 INFO L87 Difference]: Start difference. First operand 2400 states and 3941 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:45,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:45,065 INFO L93 Difference]: Finished difference Result 5913 states and 9801 transitions. [2022-12-14 10:37:45,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:37:45,065 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 85 [2022-12-14 10:37:45,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:45,077 INFO L225 Difference]: With dead ends: 5913 [2022-12-14 10:37:45,077 INFO L226 Difference]: Without dead ends: 3935 [2022-12-14 10:37:45,082 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 10:37:45,082 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 47 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:45,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 447 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2022-12-14 10:37:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3930. [2022-12-14 10:37:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3930 states, 2941 states have (on average 1.536552193131588) internal successors, (4519), 2944 states have internal predecessors, (4519), 965 states have call successors, (965), 23 states have call predecessors, (965), 23 states have return successors, (964), 964 states have call predecessors, (964), 964 states have call successors, (964) [2022-12-14 10:37:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 6448 transitions. [2022-12-14 10:37:45,377 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 6448 transitions. Word has length 85 [2022-12-14 10:37:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:45,377 INFO L495 AbstractCegarLoop]: Abstraction has 3930 states and 6448 transitions. [2022-12-14 10:37:45,377 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 6448 transitions. [2022-12-14 10:37:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 10:37:45,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:45,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 10:37:45,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:37:45,393 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:45,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash -343441098, now seen corresponding path program 1 times [2022-12-14 10:37:45,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:45,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310907011] [2022-12-14 10:37:45,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:45,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:37:45,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:45,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310907011] [2022-12-14 10:37:45,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310907011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:45,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:37:45,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:37:45,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953686575] [2022-12-14 10:37:45,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:45,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:37:45,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:45,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:37:45,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:37:45,461 INFO L87 Difference]: Start difference. First operand 3930 states and 6448 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:45,784 INFO L93 Difference]: Finished difference Result 9774 states and 16198 transitions. [2022-12-14 10:37:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:37:45,784 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2022-12-14 10:37:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:45,805 INFO L225 Difference]: With dead ends: 9774 [2022-12-14 10:37:45,805 INFO L226 Difference]: Without dead ends: 6532 [2022-12-14 10:37:45,812 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 10:37:45,813 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 45 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:45,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 438 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2022-12-14 10:37:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6527. [2022-12-14 10:37:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 4932 states have (on average 1.532846715328467) internal successors, (7560), 4935 states have internal predecessors, (7560), 1571 states have call successors, (1571), 23 states have call predecessors, (1571), 23 states have return successors, (1570), 1570 states have call predecessors, (1570), 1570 states have call successors, (1570) [2022-12-14 10:37:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 10701 transitions. [2022-12-14 10:37:46,117 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 10701 transitions. Word has length 86 [2022-12-14 10:37:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:46,117 INFO L495 AbstractCegarLoop]: Abstraction has 6527 states and 10701 transitions. [2022-12-14 10:37:46,117 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 10701 transitions. [2022-12-14 10:37:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 10:37:46,128 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:46,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 10:37:46,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 10:37:46,128 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash 222962457, now seen corresponding path program 1 times [2022-12-14 10:37:46,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:46,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479631971] [2022-12-14 10:37:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:46,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:37:46,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479631971] [2022-12-14 10:37:46,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479631971] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:46,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:37:46,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:37:46,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695535283] [2022-12-14 10:37:46,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:46,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:37:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:37:46,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:37:46,179 INFO L87 Difference]: Start difference. First operand 6527 states and 10701 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:46,745 INFO L93 Difference]: Finished difference Result 17026 states and 28116 transitions. [2022-12-14 10:37:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:37:46,746 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2022-12-14 10:37:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:46,785 INFO L225 Difference]: With dead ends: 17026 [2022-12-14 10:37:46,785 INFO L226 Difference]: Without dead ends: 11476 [2022-12-14 10:37:46,797 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 10:37:46,798 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 43 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:46,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 448 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11476 states. [2022-12-14 10:37:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11476 to 11471. [2022-12-14 10:37:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11471 states, 8673 states have (on average 1.5197740112994351) internal successors, (13181), 8676 states have internal predecessors, (13181), 2774 states have call successors, (2774), 23 states have call predecessors, (2774), 23 states have return successors, (2773), 2773 states have call predecessors, (2773), 2773 states have call successors, (2773) [2022-12-14 10:37:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11471 states to 11471 states and 18728 transitions. [2022-12-14 10:37:47,339 INFO L78 Accepts]: Start accepts. Automaton has 11471 states and 18728 transitions. Word has length 87 [2022-12-14 10:37:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:47,340 INFO L495 AbstractCegarLoop]: Abstraction has 11471 states and 18728 transitions. [2022-12-14 10:37:47,340 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 11471 states and 18728 transitions. [2022-12-14 10:37:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 10:37:47,353 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:47,353 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 10:37:47,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:37:47,353 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:47,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1920858679, now seen corresponding path program 1 times [2022-12-14 10:37:47,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:47,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612763558] [2022-12-14 10:37:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:47,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:37:47,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:47,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612763558] [2022-12-14 10:37:47,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612763558] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:47,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:37:47,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:37:47,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418743350] [2022-12-14 10:37:47,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:47,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:37:47,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:47,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:37:47,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:37:47,404 INFO L87 Difference]: Start difference. First operand 11471 states and 18728 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:48,330 INFO L93 Difference]: Finished difference Result 30345 states and 49882 transitions. [2022-12-14 10:37:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:37:48,330 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 88 [2022-12-14 10:37:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:48,398 INFO L225 Difference]: With dead ends: 30345 [2022-12-14 10:37:48,399 INFO L226 Difference]: Without dead ends: 20303 [2022-12-14 10:37:48,424 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 10:37:48,425 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 41 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:48,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 435 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20303 states. [2022-12-14 10:37:49,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20303 to 20298. [2022-12-14 10:37:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20298 states, 15461 states have (on average 1.5121919668844188) internal successors, (23380), 15464 states have internal predecessors, (23380), 4813 states have call successors, (4813), 23 states have call predecessors, (4813), 23 states have return successors, (4812), 4812 states have call predecessors, (4812), 4812 states have call successors, (4812) [2022-12-14 10:37:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20298 states to 20298 states and 33005 transitions. [2022-12-14 10:37:49,565 INFO L78 Accepts]: Start accepts. Automaton has 20298 states and 33005 transitions. Word has length 88 [2022-12-14 10:37:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:49,566 INFO L495 AbstractCegarLoop]: Abstraction has 20298 states and 33005 transitions. [2022-12-14 10:37:49,566 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 20298 states and 33005 transitions. [2022-12-14 10:37:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 10:37:49,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:49,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 10:37:49,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 10:37:49,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1898023227, now seen corresponding path program 1 times [2022-12-14 10:37:49,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:49,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710178451] [2022-12-14 10:37:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:49,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:37:49,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710178451] [2022-12-14 10:37:49,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710178451] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:49,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:37:49,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:37:49,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582993905] [2022-12-14 10:37:49,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:49,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:37:49,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:49,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:37:49,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:37:49,688 INFO L87 Difference]: Start difference. First operand 20298 states and 33005 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:51,144 INFO L93 Difference]: Finished difference Result 55057 states and 89974 transitions. [2022-12-14 10:37:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:37:51,145 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 89 [2022-12-14 10:37:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:51,242 INFO L225 Difference]: With dead ends: 55057 [2022-12-14 10:37:51,242 INFO L226 Difference]: Without dead ends: 36743 [2022-12-14 10:37:51,281 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 10:37:51,282 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 39 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:51,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 437 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:51,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36743 states. [2022-12-14 10:37:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36743 to 36738. [2022-12-14 10:37:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36738 states, 28186 states have (on average 1.5015965372880153) internal successors, (42324), 28189 states have internal predecessors, (42324), 8528 states have call successors, (8528), 23 states have call predecessors, (8528), 23 states have return successors, (8527), 8527 states have call predecessors, (8527), 8527 states have call successors, (8527) [2022-12-14 10:37:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36738 states to 36738 states and 59379 transitions. [2022-12-14 10:37:53,569 INFO L78 Accepts]: Start accepts. Automaton has 36738 states and 59379 transitions. Word has length 89 [2022-12-14 10:37:53,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:53,569 INFO L495 AbstractCegarLoop]: Abstraction has 36738 states and 59379 transitions. [2022-12-14 10:37:53,569 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 36738 states and 59379 transitions. [2022-12-14 10:37:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 10:37:53,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:53,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 10:37:53,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 10:37:53,583 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:53,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:53,583 INFO L85 PathProgramCache]: Analyzing trace with hash -169211625, now seen corresponding path program 1 times [2022-12-14 10:37:53,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:53,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542865194] [2022-12-14 10:37:53,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:53,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:37:53,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542865194] [2022-12-14 10:37:53,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542865194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:53,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:37:53,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:37:53,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287631220] [2022-12-14 10:37:53,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:53,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:37:53,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:37:53,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:37:53,633 INFO L87 Difference]: Start difference. First operand 36738 states and 59379 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:37:56,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:56,398 INFO L93 Difference]: Finished difference Result 67674 states and 109555 transitions. [2022-12-14 10:37:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:37:56,399 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 90 [2022-12-14 10:37:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:56,595 INFO L225 Difference]: With dead ends: 67674 [2022-12-14 10:37:56,595 INFO L226 Difference]: Without dead ends: 67571 [2022-12-14 10:37:56,617 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 10:37:56,617 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 37 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:56,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 435 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:37:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67571 states. [2022-12-14 10:37:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67571 to 67566. [2022-12-14 10:37:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67566 states, 52215 states have (on average 1.4876951067700852) internal successors, (77680), 52218 states have internal predecessors, (77680), 15327 states have call successors, (15327), 23 states have call predecessors, (15327), 23 states have return successors, (15326), 15326 states have call predecessors, (15326), 15326 states have call successors, (15326) [2022-12-14 10:38:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67566 states to 67566 states and 108333 transitions. [2022-12-14 10:38:00,090 INFO L78 Accepts]: Start accepts. Automaton has 67566 states and 108333 transitions. Word has length 90 [2022-12-14 10:38:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:38:00,090 INFO L495 AbstractCegarLoop]: Abstraction has 67566 states and 108333 transitions. [2022-12-14 10:38:00,091 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:38:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 67566 states and 108333 transitions. [2022-12-14 10:38:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 10:38:00,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:38:00,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 10:38:00,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 10:38:00,105 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:38:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:38:00,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1728810054, now seen corresponding path program 1 times [2022-12-14 10:38:00,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:38:00,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513783917] [2022-12-14 10:38:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:00,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:38:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:38:01,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:38:01,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513783917] [2022-12-14 10:38:01,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513783917] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:38:01,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:38:01,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-14 10:38:01,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370453841] [2022-12-14 10:38:01,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:38:01,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 10:38:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:38:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 10:38:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:38:01,027 INFO L87 Difference]: Start difference. First operand 67566 states and 108333 transitions. Second operand has 20 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 states have internal predecessors, (55), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-12-14 10:38:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:38:05,385 INFO L93 Difference]: Finished difference Result 67713 states and 108551 transitions. [2022-12-14 10:38:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:38:05,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 states have internal predecessors, (55), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 91 [2022-12-14 10:38:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:38:05,564 INFO L225 Difference]: With dead ends: 67713 [2022-12-14 10:38:05,564 INFO L226 Difference]: Without dead ends: 67631 [2022-12-14 10:38:05,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:38:05,586 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 507 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:38:05,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 2618 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:38:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67631 states. [2022-12-14 10:38:09,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67631 to 67591. [2022-12-14 10:38:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67591 states, 52229 states have (on average 1.4875643799421778) internal successors, (77694), 52232 states have internal predecessors, (77694), 15335 states have call successors, (15335), 27 states have call predecessors, (15335), 26 states have return successors, (15334), 15334 states have call predecessors, (15334), 15334 states have call successors, (15334) [2022-12-14 10:38:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67591 states to 67591 states and 108363 transitions. [2022-12-14 10:38:09,325 INFO L78 Accepts]: Start accepts. Automaton has 67591 states and 108363 transitions. Word has length 91 [2022-12-14 10:38:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:38:09,326 INFO L495 AbstractCegarLoop]: Abstraction has 67591 states and 108363 transitions. [2022-12-14 10:38:09,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 states have internal predecessors, (55), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-12-14 10:38:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 67591 states and 108363 transitions. [2022-12-14 10:38:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 10:38:09,428 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:38:09,428 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:38:09,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 10:38:09,428 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:38:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:38:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1132477688, now seen corresponding path program 1 times [2022-12-14 10:38:09,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:38:09,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81079256] [2022-12-14 10:38:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:09,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:38:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:38:09,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:38:09,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81079256] [2022-12-14 10:38:09,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81079256] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:38:09,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:38:09,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:38:09,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561498139] [2022-12-14 10:38:09,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:38:09,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:38:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:38:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:38:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:38:09,623 INFO L87 Difference]: Start difference. First operand 67591 states and 108363 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 4 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2022-12-14 10:38:13,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:38:13,348 INFO L93 Difference]: Finished difference Result 67647 states and 108413 transitions. [2022-12-14 10:38:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:38:13,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 4 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 144 [2022-12-14 10:38:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:38:13,519 INFO L225 Difference]: With dead ends: 67647 [2022-12-14 10:38:13,519 INFO L226 Difference]: Without dead ends: 67605 [2022-12-14 10:38:13,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:38:13,537 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 186 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:38:13,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 381 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:38:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67605 states. [2022-12-14 10:38:17,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67605 to 67605. [2022-12-14 10:38:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67605 states, 52236 states have (on average 1.4874798989202849) internal successors, (77700), 52239 states have internal predecessors, (77700), 15335 states have call successors, (15335), 34 states have call predecessors, (15335), 33 states have return successors, (15334), 15334 states have call predecessors, (15334), 15334 states have call successors, (15334) [2022-12-14 10:38:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67605 states to 67605 states and 108369 transitions. [2022-12-14 10:38:17,493 INFO L78 Accepts]: Start accepts. Automaton has 67605 states and 108369 transitions. Word has length 144 [2022-12-14 10:38:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:38:17,493 INFO L495 AbstractCegarLoop]: Abstraction has 67605 states and 108369 transitions. [2022-12-14 10:38:17,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 4 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2022-12-14 10:38:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 67605 states and 108369 transitions. [2022-12-14 10:38:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 10:38:17,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:38:17,603 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:38:17,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 10:38:17,603 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:38:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:38:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1847667923, now seen corresponding path program 1 times [2022-12-14 10:38:17,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:38:17,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371182532] [2022-12-14 10:38:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:17,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:38:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 10:38:18,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:38:18,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371182532] [2022-12-14 10:38:18,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371182532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:38:18,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:38:18,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-14 10:38:18,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987418919] [2022-12-14 10:38:18,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:38:18,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 10:38:18,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:38:18,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 10:38:18,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:38:18,372 INFO L87 Difference]: Start difference. First operand 67605 states and 108369 transitions. Second operand has 20 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 12 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2022-12-14 10:38:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:38:23,173 INFO L93 Difference]: Finished difference Result 67780 states and 108563 transitions. [2022-12-14 10:38:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 10:38:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 12 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 152 [2022-12-14 10:38:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:38:23,338 INFO L225 Difference]: With dead ends: 67780 [2022-12-14 10:38:23,338 INFO L226 Difference]: Without dead ends: 67732 [2022-12-14 10:38:23,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=1518, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 10:38:23,357 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 452 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:38:23,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1568 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:38:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67732 states. [2022-12-14 10:38:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67732 to 67673. [2022-12-14 10:38:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67673 states, 52276 states have (on average 1.4872216695998164) internal successors, (77746), 52279 states have internal predecessors, (77746), 15351 states have call successors, (15351), 46 states have call predecessors, (15351), 45 states have return successors, (15350), 15349 states have call predecessors, (15350), 15350 states have call successors, (15350) [2022-12-14 10:38:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67673 states to 67673 states and 108447 transitions. [2022-12-14 10:38:27,617 INFO L78 Accepts]: Start accepts. Automaton has 67673 states and 108447 transitions. Word has length 152 [2022-12-14 10:38:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:38:27,617 INFO L495 AbstractCegarLoop]: Abstraction has 67673 states and 108447 transitions. [2022-12-14 10:38:27,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 12 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2022-12-14 10:38:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 67673 states and 108447 transitions. [2022-12-14 10:38:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 10:38:27,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:38:27,727 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:38:27,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 10:38:27,728 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:38:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:38:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1347460880, now seen corresponding path program 1 times [2022-12-14 10:38:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:38:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793488257] [2022-12-14 10:38:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:38:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 10:38:29,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:38:29,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793488257] [2022-12-14 10:38:29,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793488257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:38:29,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519252918] [2022-12-14 10:38:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:29,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:38:29,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:38:29,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:38:29,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:38:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:29,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1534 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 10:38:29,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:38:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 10:38:31,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:38:31,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519252918] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:38:31,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:38:31,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [36] total 47 [2022-12-14 10:38:31,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253093358] [2022-12-14 10:38:31,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:38:31,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:38:31,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:38:31,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:38:31,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2044, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 10:38:31,994 INFO L87 Difference]: Start difference. First operand 67673 states and 108447 transitions. Second operand has 13 states, 12 states have (on average 7.833333333333333) internal successors, (94), 11 states have internal predecessors, (94), 7 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) [2022-12-14 10:38:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:38:36,965 INFO L93 Difference]: Finished difference Result 70790 states and 113348 transitions. [2022-12-14 10:38:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:38:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.833333333333333) internal successors, (94), 11 states have internal predecessors, (94), 7 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) Word has length 158 [2022-12-14 10:38:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:38:37,146 INFO L225 Difference]: With dead ends: 70790 [2022-12-14 10:38:37,147 INFO L226 Difference]: Without dead ends: 70667 [2022-12-14 10:38:37,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=2592, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 10:38:37,164 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 384 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:38:37,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1389 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 10:38:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70667 states. [2022-12-14 10:38:41,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70667 to 70444. [2022-12-14 10:38:41,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70444 states, 54271 states have (on average 1.4851946711871902) internal successors, (80603), 54634 states have internal predecessors, (80603), 16087 states have call successors, (16087), 88 states have call predecessors, (16087), 85 states have return successors, (16085), 15723 states have call predecessors, (16085), 16085 states have call successors, (16085) [2022-12-14 10:38:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70444 states to 70444 states and 112775 transitions. [2022-12-14 10:38:41,738 INFO L78 Accepts]: Start accepts. Automaton has 70444 states and 112775 transitions. Word has length 158 [2022-12-14 10:38:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:38:41,738 INFO L495 AbstractCegarLoop]: Abstraction has 70444 states and 112775 transitions. [2022-12-14 10:38:41,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.833333333333333) internal successors, (94), 11 states have internal predecessors, (94), 7 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) [2022-12-14 10:38:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 70444 states and 112775 transitions. [2022-12-14 10:38:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 10:38:41,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:38:41,859 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:38:41,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:38:42,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 10:38:42,061 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:38:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:38:42,062 INFO L85 PathProgramCache]: Analyzing trace with hash -686704150, now seen corresponding path program 1 times [2022-12-14 10:38:42,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:38:42,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953047808] [2022-12-14 10:38:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:42,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:38:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 10:38:42,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:38:42,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953047808] [2022-12-14 10:38:42,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953047808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:38:42,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592854851] [2022-12-14 10:38:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:42,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:38:42,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:38:42,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:38:42,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:38:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:43,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 10:38:43,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:38:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 10:38:44,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:38:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 10:38:48,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592854851] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:38:48,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1622843522] [2022-12-14 10:38:48,542 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2022-12-14 10:38:48,542 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:38:48,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:38:48,543 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:38:48,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:39:43,331 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 440 for LOIs [2022-12-14 10:39:43,654 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 263 for LOIs [2022-12-14 10:39:46,702 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-12-14 10:39:47,023 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 538 for LOIs [2022-12-14 10:40:24,513 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 208 for LOIs [2022-12-14 10:40:25,144 INFO L197 IcfgInterpreter]: Interpreting procedure isEncrypted with input of size 208 for LOIs [2022-12-14 10:40:25,174 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 208 for LOIs [2022-12-14 10:40:25,207 INFO L197 IcfgInterpreter]: Interpreting procedure findPublicKey with input of size 212 for LOIs [2022-12-14 10:40:25,262 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailFrom with input of size 208 for LOIs [2022-12-14 10:40:25,292 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 208 for LOIs [2022-12-14 10:40:25,322 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 396 for LOIs [2022-12-14 10:40:25,569 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 472 for LOIs [2022-12-14 10:40:30,179 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 208 for LOIs [2022-12-14 10:40:30,210 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:42:59,579 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 499 DAG size of output: 418 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:43:10,374 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 538 DAG size of output: 416 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:43:19,035 WARN L233 SmtUtils]: Spent 7.74s on a formula simplification. DAG size of input: 550 DAG size of output: 428 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:44:10,523 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 625 DAG size of output: 463 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:45:22,134 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 580 DAG size of output: 417 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:45:29,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1512389#(and (<= |outgoing_outgoing__wrappee__Keys_~msg#1| 2147483647) (= ~__ste_Client_Keyring1_User2~0 0) (<= |outgoing_sign_#in~msg#1| 2147483647) (= ~__GUIDSL_NON_TERMINAL_main~0 0) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_#in~client#1| 2147483648)) (<= ~queued_message~0 2147483647) (<= 0 (+ |outgoing_~msg#1| 2147483648)) (= ~__ste_email_subject0~0.offset 0) (= ~__SELECTED_FEATURE_Sign~0 0) (= 0 ~__ste_Client_AddressBook0_Address2~0) (= ~__ste_client_outbuffer3~0 0) (<= 0 (+ 2147483648 |outgoing_getClientId_#res#1|)) (= ~__ste_Client_counter~0 0) (<= |outgoing_outgoing__wrappee__Keys_~client#1| 2147483647) (= ~__ste_Client_Keyring1_PublicKey2~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~client#1| 2147483647) (<= |outgoing_mail_#in~client#1| 2147483647) (<= 0 (+ |outgoing_outgoing__wrappee__AutoResponder_#in~client#1| 2147483648)) (= ~__ste_client_autoResponse1~0 0) (= ~__ste_Client_AddressBook2_Alias0~0 0) (= 0 ~__ste_email_subject0~0.base) (<= |outgoing_outgoing__wrappee__Keys_~tmp~1#1| 2147483647) (<= 0 (+ |outgoing_outgoing__wrappee__AutoResponder_~msg#1| 2147483648)) (<= 0 (+ |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1| 2147483648)) (= ~__ste_Client_AddressBook2_Alias1~0 0) (= ~__ste_Client_Keyring2_PublicKey2~0 0) (= ~__ste_client_forwardReceiver3~0 0) (<= 0 (+ 2147483648 |outgoing___utac_acc__SignForward_spec__1_~msg#1|)) (<= |outgoing_sign_~privkey~1#1| 2147483647) (<= 0 (+ |outgoing___utac_acc__SignForward_spec__1_#in~msg#1| 2147483648)) (= ~__ste_client_name2~0.offset 0) (= ~__ste_client_name1~0.base 0) (<= |outgoing___utac_acc__SignForward_spec__1_~tmp___0~8#1| 2147483647) (= ~__SELECTED_FEATURE_Verify~0 0) (= ~__ste_Client_Keyring1_User0~0 0) (<= |outgoing___utac_acc__SignForward_spec__1_#in~client#1| 2147483647) (<= |outgoing_~client#1| 2147483647) (<= ~__ste_client_idCounter2~0 3) (= ~__ste_email_body1~0.offset 0) (<= 0 (+ |outgoing_getClientId_~handle#1| 2147483648)) (= ~__SELECTED_FEATURE_Encrypt~0 0) (= ~__ste_Client_AddressBook1_Address2~0 0) (<= |outgoing_sign_~msg#1| 2147483647) (= ~__ste_ClientAddressBook_size1~0 0) (= ~__ste_Client_Keyring0_PublicKey0~0 0) (= ~__ste_Email_counter~0 0) (= ~__ste_ClientKeyring_size1~0 0) (= ~__ste_email_body0~0.offset 0) (= ~__ste_Client_Keyring0_User2~0 0) (<= |outgoing_getClientId_~handle#1| 2147483647) (= ~__ste_ClientAddressBook_size0~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1| 2147483647) (<= |old(~queued_client~0)| 2147483647) (= ~__ste_Client_Keyring0_User1~0 0) (= ~__ste_Client_AddressBook1_Alias1~0 0) (= ~__ste_client_name1~0.offset 0) (<= |outgoing___utac_acc__SignForward_spec__1_#in~msg#1| 2147483647) (<= |outgoing_outgoing__wrappee__Keys_#in~msg#1| 2147483647) (<= |outgoing_getClientId_#res#1| 2147483647) (= ~head~0.offset 0) (= ~__ste_client_name0~0.offset 0) (= ~__ste_Client_Keyring0_PublicKey2~0 0) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_~client#1| 2147483648)) (<= 0 (+ ~queued_client~0 2147483648)) (= ~__ste_Client_Keyring1_PublicKey0~0 0) (= 789 ~__ste_client_privateKey2~0) (<= |outgoing_#in~client#1| 2147483647) (<= ~queue_empty~0 1) (= ~__SELECTED_FEATURE_Decrypt~0 0) (<= 0 (+ ~queued_message~0 2147483648)) (<= 0 (+ |outgoing_mail_~msg#1| 2147483648)) (<= |outgoing_sign_#in~client#1| 2147483647) (<= 0 |outgoing_outgoing__wrappee__AutoResponder_~tmp___0~0#1|) (<= 0 (+ |outgoing___utac_acc__SignForward_spec__1_~client#1| 2147483648)) (= ~__SELECTED_FEATURE_Keys~0 0) (<= 0 (+ |outgoing_mail_#in~msg#1| 2147483648)) (= ~__SELECTED_FEATURE_AddressBook~0 0) (= ~__ste_client_forwardReceiver2~0 0) (= ~__ste_Client_Keyring0_PublicKey1~0 0) (<= 0 |old(~queue_empty~0)|) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp___0~0#1| 0) (= ~__SELECTED_FEATURE_Forward~0 0) (= ~__ste_Client_Keyring0_User0~0 0) (<= |outgoing___utac_acc__SignForward_spec__1_~client#1| 2147483647) (<= 0 (+ |outgoing___utac_acc__SignForward_spec__1_#in~client#1| 2147483648)) (= ~__ste_Client_Keyring2_PublicKey1~0 0) (<= 0 (+ |outgoing_outgoing__wrappee__AutoResponder_~receiver~0#1| 2147483648)) (= ~__ste_email_body0~0.base 0) (<= 0 (+ |outgoing_sign_~tmp~8#1| 2147483648)) (= ~__ste_Client_AddressBook0_Alias0~0 0) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_~tmp~1#1| 2147483648)) (= ~__ste_email_id0~0 0) (<= 0 (+ |outgoing_~client#1| 2147483648)) (<= |outgoing_mail_~__utac__ad__arg2~0#1| 2147483647) (<= 0 (+ |outgoing_mail_~__utac__ad__arg2~0#1| 2147483648)) (<= 0 ~queue_empty~0) (= ~__ste_Client_Keyring2_User1~0 0) (<= 3 ~__ste_client_idCounter2~0) (= ~__ste_Client_AddressBook2_Address2~0 0) (= 3 ~chuck~0) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_~msg#1| 2147483648)) (= ~__ste_Client_AddressBook2_Address1~0 0) (<= |outgoing___utac_acc__SignForward_spec__1_~msg#1| 2147483647) (= ~bob~0 1) (= ~__ste_client_forwardReceiver1~0 0) (<= 0 (+ |outgoing_getClientId_~retValue_acc~28#1| 2147483648)) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp~2#1| 2147483647) (= ~__ste_Client_AddressBook1_Alias2~0 0) (<= |outgoing_mail_~__utac__ad__arg1~0#1| 2147483647) (= ~__ste_client_outbuffer0~0 0) (<= |outgoing_#in~msg#1| 2147483647) (<= 0 (+ |outgoing_#in~client#1| 2147483648)) (<= 0 (+ |outgoing_sign_~msg#1| 2147483648)) (<= 0 (+ |old(~queued_client~0)| 2147483648)) (= ~__SELECTED_FEATURE_Base~0 0) (<= 0 (+ |old(~queued_message~0)| 2147483648)) (= ~__ste_client_forwardReceiver0~0 0) (<= |outgoing_getClientId_#in~handle#1| 2147483647) (= ~__ste_Client_Keyring2_User0~0 0) (= |outgoing_outgoing__wrappee__AutoResponder_~pubkey~0#1| 0) (= ~rjh~0 2) (= 0 ~__ste_Client_AddressBook0_Address1~0) (<= |outgoing_outgoing__wrappee__AutoResponder_~receiver~0#1| 2147483647) (= ~__ste_Client_AddressBook2_Address0~0 0) (= ~__ste_Client_Keyring1_PublicKey1~0 0) (<= 0 (+ |outgoing_getClientId_#in~handle#1| 2147483648)) (= ~__ste_Client_Keyring2_PublicKey0~0 0) (= ~__ste_Client_AddressBook1_Address0~0 0) (<= |outgoing_sign_~tmp~8#1| 2147483647) (= ~__ste_client_name2~0.base 0) (<= 0 (+ 2147483648 |outgoing_mail_~client#1|)) (<= |outgoing_mail_~client#1| 2147483647) (= ~__ste_email_subject1~0.base 0) (<= |outgoing_mail_~msg#1| 2147483647) (<= |old(~queue_empty~0)| 1) (<= |outgoing_mail_#in~msg#1| 2147483647) (= ~__ste_Client_AddressBook1_Alias0~0 0) (<= 0 (+ |outgoing_#in~msg#1| 2147483648)) (<= 0 (+ |outgoing_outgoing__wrappee__AutoResponder_~tmp~2#1| 2147483648)) (= ~__ste_Client_Keyring2_User2~0 0) (<= 0 (+ |outgoing_sign_~client#1| 2147483648)) (= ~head~0.base 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~msg#1| 2147483647) (= ~__ste_Client_Keyring1_User1~0 0) (= |#NULL.offset| 0) (<= |outgoing_~msg#1| 2147483647) (= ~__ste_Client_AddressBook2_Alias2~0 0) (<= 0 (+ |outgoing_sign_~privkey~1#1| 2147483648)) (<= |old(~queued_message~0)| 2147483647) (= ~__ste_email_subject1~0.offset 0) (= ~__ste_Client_AddressBook0_Alias2~0 0) (= ~__ste_ClientKeyring_size0~0 0) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_#in~msg#1| 2147483648)) (= ~__ste_Client_AddressBook1_Address1~0 0) (= 0 ~__ste_Client_AddressBook0_Address0~0) (= ~__ste_client_outbuffer1~0 0) (<= |outgoing_getClientId_~retValue_acc~28#1| 2147483647) (<= 0 (+ |outgoing_sign_#in~msg#1| 2147483648)) (= ~__ste_Client_AddressBook0_Alias1~0 0) (= ~__GUIDSL_ROOT_PRODUCTION~0 0) (<= ~queued_client~0 2147483647) (<= |outgoing_outgoing__wrappee__Keys_#in~client#1| 2147483647) (<= |outgoing_sign_~client#1| 2147483647) (<= 0 (+ |outgoing_sign_#in~client#1| 2147483648)) (= ~__ste_client_name0~0.base 0) (= ~__ste_email_id1~0 0) (= ~__ste_client_outbuffer2~0 0) (<= 0 (+ |outgoing_mail_~__utac__ad__arg1~0#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~__ste_ClientAddressBook_size2~0 0) (= |outgoing___utac_acc__SignForward_spec__1_~tmp~23#1| 0) (= ~__SELECTED_FEATURE_AutoResponder~0 0) (= ~__ste_client_autoResponse0~0 0) (= ~__ste_email_body1~0.base 0) (<= 0 (+ |outgoing_mail_#in~client#1| 2147483648)) (= ~__ste_ClientKeyring_size2~0 0) (= ~__ste_client_autoResponse2~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~client#1| 2147483647) (<= 0 (+ |outgoing_outgoing__wrappee__AutoResponder_~client#1| 2147483648)) (= |#NULL.base| 0) (<= 0 (+ |outgoing___utac_acc__SignForward_spec__1_~tmp___0~8#1| 2147483648)))' at error location [2022-12-14 10:45:29,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:45:29,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:45:29,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 55 [2022-12-14 10:45:29,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594855276] [2022-12-14 10:45:29,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:45:29,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 10:45:29,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:45:29,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 10:45:29,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1749, Invalid=22431, Unknown=0, NotChecked=0, Total=24180 [2022-12-14 10:45:29,860 INFO L87 Difference]: Start difference. First operand 70444 states and 112775 transitions. Second operand has 55 states, 43 states have (on average 5.232558139534884) internal successors, (225), 46 states have internal predecessors, (225), 34 states have call successors, (76), 7 states have call predecessors, (76), 16 states have return successors, (75), 40 states have call predecessors, (75), 34 states have call successors, (75) [2022-12-14 10:45:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:45:52,576 INFO L93 Difference]: Finished difference Result 104917 states and 167716 transitions. [2022-12-14 10:45:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 10:45:52,577 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 5.232558139534884) internal successors, (225), 46 states have internal predecessors, (225), 34 states have call successors, (76), 7 states have call predecessors, (76), 16 states have return successors, (75), 40 states have call predecessors, (75), 34 states have call successors, (75) Word has length 157 [2022-12-14 10:45:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:45:52,867 INFO L225 Difference]: With dead ends: 104917 [2022-12-14 10:45:52,867 INFO L226 Difference]: Without dead ends: 104523 [2022-12-14 10:45:52,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 331 SyntacticMatches, 4 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13023 ImplicationChecksByTransitivity, 303.1s TimeCoverageRelationStatistics Valid=2381, Invalid=32401, Unknown=0, NotChecked=0, Total=34782 [2022-12-14 10:45:52,895 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 1311 mSDsluCounter, 4151 mSDsCounter, 0 mSdLazyCounter, 6010 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 4405 SdHoareTripleChecker+Invalid, 6675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 6010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:45:52,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1335 Valid, 4405 Invalid, 6675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 6010 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 10:45:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104523 states. [2022-12-14 10:46:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104523 to 101367. [2022-12-14 10:46:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101367 states, 78256 states have (on average 1.465817317521979) internal successors, (114709), 78753 states have internal predecessors, (114709), 23013 states have call successors, (23013), 101 states have call predecessors, (23013), 97 states have return successors, (23011), 22514 states have call predecessors, (23011), 23011 states have call successors, (23011) [2022-12-14 10:46:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101367 states to 101367 states and 160733 transitions. [2022-12-14 10:46:11,901 INFO L78 Accepts]: Start accepts. Automaton has 101367 states and 160733 transitions. Word has length 157 [2022-12-14 10:46:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:46:11,901 INFO L495 AbstractCegarLoop]: Abstraction has 101367 states and 160733 transitions. [2022-12-14 10:46:11,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 5.232558139534884) internal successors, (225), 46 states have internal predecessors, (225), 34 states have call successors, (76), 7 states have call predecessors, (76), 16 states have return successors, (75), 40 states have call predecessors, (75), 34 states have call successors, (75) [2022-12-14 10:46:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 101367 states and 160733 transitions. [2022-12-14 10:46:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 10:46:12,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:46:12,085 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:46:12,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:46:12,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73ef60f-1b57-470a-9ef0-8b204846b676/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:46:12,286 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:46:12,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:46:12,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1999738552, now seen corresponding path program 1 times [2022-12-14 10:46:12,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:46:12,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857317198] [2022-12-14 10:46:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:46:12,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:46:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:46:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 10:46:12,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:46:12,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857317198] [2022-12-14 10:46:12,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857317198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:46:12,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:46:12,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:46:12,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326751827] [2022-12-14 10:46:12,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:46:12,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:46:12,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:46:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:46:12,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:46:12,399 INFO L87 Difference]: Start difference. First operand 101367 states and 160733 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-12-14 10:46:22,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:46:22,620 INFO L93 Difference]: Finished difference Result 134180 states and 213750 transitions. [2022-12-14 10:46:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:46:22,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 159 [2022-12-14 10:46:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:46:22,782 INFO L225 Difference]: With dead ends: 134180 [2022-12-14 10:46:22,783 INFO L226 Difference]: Without dead ends: 67297 [2022-12-14 10:46:22,859 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 10:46:22,860 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 54 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:46:22,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 507 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:46:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67297 states.