./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product13.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI --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 a4d75af8ac92d9f5b92cf5fbd6315f6202b8108aa1e42fc32d65f286c89fdf2f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:17:32,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:17:32,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:17:32,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:17:32,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:17:32,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:17:32,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:17:32,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:17:32,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:17:32,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:17:32,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:17:32,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:17:32,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:17:32,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:17:32,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:17:32,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:17:32,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:17:32,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:17:32,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:17:32,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:17:32,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:17:32,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:17:32,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:17:32,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:17:32,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:17:32,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:17:32,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:17:32,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:17:32,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:17:32,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:17:32,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:17:32,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:17:32,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:17:32,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:17:32,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:17:32,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:17:32,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:17:32,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:17:32,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:17:32,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:17:32,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:17:32,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:17:32,435 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:17:32,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:17:32,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:17:32,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:17:32,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:17:32,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:17:32,438 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:17:32,438 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:17:32,438 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:17:32,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:17:32,439 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:17:32,439 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:17:32,439 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:17:32,439 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:17:32,443 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:17:32,443 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:17:32,443 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:17:32,444 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:17:32,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:17:32,445 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:17:32,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:17:32,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:17:32,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:17:32,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:17:32,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:17:32,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:17:32,449 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:17:32,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:17:32,450 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:17:32,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:17:32,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:17:32,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:17:32,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:17:32,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:17:32,452 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:17:32,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:17:32,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:17:32,454 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:17:32,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:17:32,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:17:32,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:17:32,456 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_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4d75af8ac92d9f5b92cf5fbd6315f6202b8108aa1e42fc32d65f286c89fdf2f [2022-11-03 02:17:32,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:17:32,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:17:32,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:17:32,802 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:17:32,803 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:17:32,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec4_product13.cil.c [2022-11-03 02:17:32,925 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/data/35bf2557e/1435664af6464a4d8e4415d790235251/FLAGc65810364 [2022-11-03 02:17:33,670 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:17:33,671 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/sv-benchmarks/c/product-lines/email_spec4_product13.cil.c [2022-11-03 02:17:33,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/data/35bf2557e/1435664af6464a4d8e4415d790235251/FLAGc65810364 [2022-11-03 02:17:33,874 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/data/35bf2557e/1435664af6464a4d8e4415d790235251 [2022-11-03 02:17:33,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:17:33,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:17:33,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:17:33,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:17:33,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:17:33,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:17:33" (1/1) ... [2022-11-03 02:17:33,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7769441c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:33, skipping insertion in model container [2022-11-03 02:17:33,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:17:33" (1/1) ... [2022-11-03 02:17:33,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:17:33,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:17:34,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/sv-benchmarks/c/product-lines/email_spec4_product13.cil.c[42804,42817] [2022-11-03 02:17:34,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:17:34,531 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:17:34,657 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/sv-benchmarks/c/product-lines/email_spec4_product13.cil.c[42804,42817] [2022-11-03 02:17:34,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:17:34,719 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:17:34,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34 WrapperNode [2022-11-03 02:17:34,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:17:34,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:17:34,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:17:34,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:17:34,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,827 INFO L138 Inliner]: procedures = 124, calls = 189, calls flagged for inlining = 53, calls inlined = 44, statements flattened = 837 [2022-11-03 02:17:34,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:17:34,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:17:34,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:17:34,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:17:34,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,885 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:17:34,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:17:34,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:17:34,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:17:34,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (1/1) ... [2022-11-03 02:17:34,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:17:34,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:34,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:17:34,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:17:35,008 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 02:17:35,009 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 02:17:35,009 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 02:17:35,009 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 02:17:35,009 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 02:17:35,009 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 02:17:35,009 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 02:17:35,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 02:17:35,009 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 02:17:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 02:17:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 02:17:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 02:17:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 02:17:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 02:17:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 02:17:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 02:17:35,011 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 02:17:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 02:17:35,011 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 02:17:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:17:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 02:17:35,012 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 02:17:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 02:17:35,012 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 02:17:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 02:17:35,013 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 02:17:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 02:17:35,013 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 02:17:35,014 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 02:17:35,014 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 02:17:35,014 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 02:17:35,014 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 02:17:35,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:17:35,015 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 02:17:35,015 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 02:17:35,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:17:35,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:17:35,230 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:17:35,248 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:17:36,157 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:17:36,668 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:17:36,668 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:17:36,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:17:36 BoogieIcfgContainer [2022-11-03 02:17:36,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:17:36,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:17:36,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:17:36,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:17:36,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:17:33" (1/3) ... [2022-11-03 02:17:36,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2221c7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:17:36, skipping insertion in model container [2022-11-03 02:17:36,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:34" (2/3) ... [2022-11-03 02:17:36,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2221c7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:17:36, skipping insertion in model container [2022-11-03 02:17:36,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:17:36" (3/3) ... [2022-11-03 02:17:36,704 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec4_product13.cil.c [2022-11-03 02:17:36,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:17:36,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:17:36,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:17:36,844 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;@360dbb87, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:17:36,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:17:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 87 states have internal predecessors, (117), 37 states have call successors, (37), 16 states have call predecessors, (37), 16 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-03 02:17:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:17:36,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:36,867 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] [2022-11-03 02:17:36,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1824651082, now seen corresponding path program 1 times [2022-11-03 02:17:36,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:36,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101809761] [2022-11-03 02:17:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:36,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:17:37,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:37,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101809761] [2022-11-03 02:17:37,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101809761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:37,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:37,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:17:37,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414822513] [2022-11-03 02:17:37,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:37,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:17:37,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:17:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:17:37,530 INFO L87 Difference]: Start difference. First operand has 140 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 87 states have internal predecessors, (117), 37 states have call successors, (37), 16 states have call predecessors, (37), 16 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:17:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:37,716 INFO L93 Difference]: Finished difference Result 197 states and 260 transitions. [2022-11-03 02:17:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:17:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 55 [2022-11-03 02:17:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:37,743 INFO L225 Difference]: With dead ends: 197 [2022-11-03 02:17:37,744 INFO L226 Difference]: Without dead ends: 137 [2022-11-03 02:17:37,750 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 [2022-11-03 02:17:37,755 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:37,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 164 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:17:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-03 02:17:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-03 02:17:37,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 84 states have internal predecessors, (111), 37 states have call successors, (37), 16 states have call predecessors, (37), 16 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-03 02:17:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 184 transitions. [2022-11-03 02:17:37,859 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 184 transitions. Word has length 55 [2022-11-03 02:17:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:37,862 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 184 transitions. [2022-11-03 02:17:37,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:17:37,863 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 184 transitions. [2022-11-03 02:17:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:17:37,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:37,876 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] [2022-11-03 02:17:37,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:17:37,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:37,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1755402641, now seen corresponding path program 1 times [2022-11-03 02:17:37,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:37,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666649182] [2022-11-03 02:17:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:37,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:17:38,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:38,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666649182] [2022-11-03 02:17:38,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666649182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:38,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:38,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:17:38,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288546475] [2022-11-03 02:17:38,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:38,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:17:38,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:38,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:17:38,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:17:38,271 INFO L87 Difference]: Start difference. First operand 137 states and 184 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:17:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:38,412 INFO L93 Difference]: Finished difference Result 193 states and 248 transitions. [2022-11-03 02:17:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:17:38,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 56 [2022-11-03 02:17:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:38,416 INFO L225 Difference]: With dead ends: 193 [2022-11-03 02:17:38,416 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 02:17:38,417 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 [2022-11-03 02:17:38,419 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 0 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:38,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 321 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:17:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 02:17:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-11-03 02:17:38,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 85 states have (on average 1.3294117647058823) internal successors, (113), 86 states have internal predecessors, (113), 37 states have call successors, (37), 16 states have call predecessors, (37), 16 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-03 02:17:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 186 transitions. [2022-11-03 02:17:38,435 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 186 transitions. Word has length 56 [2022-11-03 02:17:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:38,436 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 186 transitions. [2022-11-03 02:17:38,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:17:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 186 transitions. [2022-11-03 02:17:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:17:38,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:38,439 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] [2022-11-03 02:17:38,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:17:38,440 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:38,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2104566704, now seen corresponding path program 1 times [2022-11-03 02:17:38,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:38,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903324858] [2022-11-03 02:17:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:38,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:17:38,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:38,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903324858] [2022-11-03 02:17:38,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903324858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:38,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:38,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:17:38,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330248939] [2022-11-03 02:17:38,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:38,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:17:38,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:38,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:17:38,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:17:38,606 INFO L87 Difference]: Start difference. First operand 139 states and 186 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:17:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:38,756 INFO L93 Difference]: Finished difference Result 308 states and 431 transitions. [2022-11-03 02:17:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:17:38,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 61 [2022-11-03 02:17:38,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:38,761 INFO L225 Difference]: With dead ends: 308 [2022-11-03 02:17:38,761 INFO L226 Difference]: Without dead ends: 187 [2022-11-03 02:17:38,767 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 [2022-11-03 02:17:38,775 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 57 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:38,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 333 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:17:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-03 02:17:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2022-11-03 02:17:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 117 states have (on average 1.4188034188034189) internal successors, (166), 118 states have internal predecessors, (166), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-03 02:17:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 261 transitions. [2022-11-03 02:17:38,815 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 261 transitions. Word has length 61 [2022-11-03 02:17:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:38,816 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 261 transitions. [2022-11-03 02:17:38,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:17:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 261 transitions. [2022-11-03 02:17:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:17:38,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:38,819 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] [2022-11-03 02:17:38,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:17:38,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:38,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1161933040, now seen corresponding path program 1 times [2022-11-03 02:17:38,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:38,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838560787] [2022-11-03 02:17:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:38,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:17:39,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:39,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838560787] [2022-11-03 02:17:39,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838560787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:17:39,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336036510] [2022-11-03 02:17:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:39,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:39,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:39,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:39,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:17:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:39,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:17:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:17:39,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:17:39,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336036510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:39,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139872350] [2022-11-03 02:17:39,740 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2022-11-03 02:17:39,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:17:39,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:17:39,756 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:17:39,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:25,280 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-03 02:18:25,694 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-03 02:18:26,116 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 466 for LOIs [2022-11-03 02:18:40,164 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 459 for LOIs [2022-11-03 02:18:56,381 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 444 for LOIs [2022-11-03 02:18:56,751 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 245 for LOIs [2022-11-03 02:18:56,967 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 243 for LOIs [2022-11-03 02:18:57,037 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:03,999 WARN L234 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 569 DAG size of output: 367 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:19,787 WARN L234 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 444 DAG size of output: 244 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:27,385 WARN L234 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 467 DAG size of output: 264 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:44,752 WARN L234 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 470 DAG size of output: 321 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:57,943 WARN L234 SmtUtils]: Spent 7.37s on a formula simplification. DAG size of input: 492 DAG size of output: 346 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:09,171 WARN L234 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 514 DAG size of output: 320 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:16,159 WARN L234 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 572 DAG size of output: 324 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:26,868 WARN L234 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 567 DAG size of output: 325 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:35,036 WARN L234 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 569 DAG size of output: 401 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:43,138 WARN L234 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 567 DAG size of output: 399 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:51,355 WARN L234 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 571 DAG size of output: 403 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:21:20,601 WARN L234 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 543 DAG size of output: 327 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:21:55,671 WARN L234 SmtUtils]: Spent 9.10s on a formula simplification. DAG size of input: 562 DAG size of output: 449 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:22:12,125 WARN L234 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 569 DAG size of output: 388 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:22:19,150 WARN L234 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 572 DAG size of output: 377 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:22:19,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2399#(and (= ~__ste_Client_Keyring1_User2~0 0) (= ~__GUIDSL_NON_TERMINAL_main~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_~msg#1|) (= ~__ste_email_isEncrypted1~0 0) (= ~__ste_email_subject0~0.offset 0) (= ~__SELECTED_FEATURE_Sign~0 0) (= 0 ~__ste_Client_AddressBook0_Address2~0) (= ~__ste_client_outbuffer3~0 0) (<= 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_Client_Keyring1_PublicKey2~0 0) (<= ~__ste_email_isSignatureVerified1~0 0) (= ~__ste_client_autoResponse1~0 0) (= ~__ste_Client_AddressBook2_Alias0~0 0) (= 0 ~__ste_email_subject0~0.base) (<= 1 |outgoing_sign_~client#1|) (<= 1 |outgoing_mail_~msg#1|) (= ~__ste_Client_AddressBook2_Alias1~0 0) (= ~__ste_Client_Keyring2_PublicKey2~0 0) (= ~__ste_client_forwardReceiver3~0 0) (<= |outgoing_mail_~__utac__ad__arg2~0#1| 1) (<= |outgoing_getClientId_~retValue_acc~22#1| 2147483647) (= ~__ste_client_name2~0.offset 0) (= ~__ste_client_name1~0.base 0) (<= |outgoing___utac_acc__SignForward_spec__1_~client#1| 1) (= ~__SELECTED_FEATURE_Verify~0 0) (= ~__ste_Client_Keyring1_User0~0 0) (= 0 |old(~__ste_email_isSignatureVerified0~0)|) (<= |outgoing_sign_~msg#1| 1) (<= ~__ste_client_idCounter2~0 3) (<= ~__ste_email_isSignatureVerified0~0 0) (<= 0 (+ |outgoing_sign_~privkey~0#1| 2147483648)) (= ~__ste_email_body1~0.offset 0) (= ~__SELECTED_FEATURE_Encrypt~0 0) (= ~__ste_Client_AddressBook1_Address2~0 0) (<= ~__ste_email_from0~0 2147483647) (= ~__ste_ClientAddressBook_size1~0 0) (= ~__ste_Client_Keyring0_PublicKey0~0 0) (<= |outgoing_sign_~privkey~0#1| 2147483647) (= ~__ste_Email_counter~0 0) (<= 1 |outgoing___utac_acc__SignForward_spec__1_#in~client#1|) (<= |outgoing_sign_~client#1| 1) (= ~__ste_ClientKeyring_size1~0 0) (= |old(~__ste_email_signKey0~0)| 0) (= ~__ste_email_body0~0.offset 0) (<= 1 |outgoing_~client#1|) (<= 0 ~__ste_email_isSigned1~0) (<= |outgoing___utac_acc__SignForward_spec__1_~tmp___0~0#1| 1) (<= 0 (+ ~__ste_email_from0~0 2147483648)) (= ~__ste_Client_Keyring0_User2~0 0) (= ~__ste_ClientAddressBook_size0~0 0) (= ~__ste_Client_Keyring0_User1~0 0) (= ~__ste_Client_AddressBook1_Alias1~0 0) (= ~__ste_email_to1~0 0) (= ~__ste_client_name1~0.offset 0) (<= |outgoing_getClientId_#res#1| 2147483647) (<= |outgoing___utac_acc__SignForward_spec__1_#in~client#1| 1) (= ~head~0.offset 0) (= ~__ste_client_name0~0.offset 0) (= |outgoing_#in~msg#1| 1) (<= 1 |outgoing_outgoing__wrappee__Keys_~client#1|) (= ~__ste_Client_Keyring0_PublicKey2~0 0) (<= ~__ste_client_privateKey2~0 789) (= ~__ste_Client_Keyring1_PublicKey0~0 0) (= |old(~__ste_email_from0~0)| 0) (<= |outgoing_sign_#in~client#1| 1) (= ~__SELECTED_FEATURE_Decrypt~0 0) (<= 1 |outgoing_getClientId_~handle#1|) (<= 0 (+ ~__ste_email_signKey0~0 2147483648)) (= ~__SELECTED_FEATURE_Keys~0 0) (<= ~__ste_email_signKey0~0 2147483647) (= |old(~__ste_email_isSigned0~0)| 0) (<= 1 |outgoing___utac_acc__SignForward_spec__1_~msg#1|) (<= |outgoing_outgoing__wrappee__Keys_~tmp~11#1| 2147483647) (= ~__SELECTED_FEATURE_AddressBook~0 0) (= ~__ste_Client_Keyring0_PublicKey1~0 0) (= ~__SELECTED_FEATURE_Forward~0 0) (<= |outgoing___utac_acc__SignForward_spec__1_#in~msg#1| 1) (= ~__ste_Client_Keyring0_User0~0 0) (<= 1 |outgoing_mail_#in~msg#1|) (<= ~__ste_client_idCounter0~0 2147483647) (= ~__ste_Client_Keyring2_PublicKey1~0 0) (= ~__ste_email_body0~0.base 0) (<= ~__ste_email_isSigned0~0 1) (= ~__ste_Client_AddressBook0_Alias0~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~msg#1|) (<= 0 (+ |outgoing_getClientId_~retValue_acc~22#1| 2147483648)) (= ~__ste_email_id0~0 0) (not (= |outgoing___utac_acc__SignForward_spec__1_~tmp___0~0#1| 0)) (<= |outgoing_mail_~__utac__ad__arg1~0#1| 1) (<= 1 |outgoing_mail_~__utac__ad__arg1~0#1|) (<= 3 ~__ste_client_idCounter2~0) (= ~__ste_Client_AddressBook2_Address2~0 0) (= 3 ~chuck~0) (<= 0 (+ 2147483648 |outgoing_sign_~tmp~14#1|)) (= ~__ste_Client_AddressBook2_Address1~0 0) (<= 0 ~__ste_email_signKey1~0) (<= ~__ste_email_signKey1~0 0) (<= ~__ste_email_isSigned1~0 0) (<= |outgoing_sign_~tmp~14#1| 2147483647) (= ~__ste_Client_AddressBook1_Alias2~0 0) (<= 0 ~__ste_email_isSignatureVerified1~0) (= ~__ste_client_outbuffer0~0 0) (<= |outgoing_outgoing__wrappee__Keys_~client#1| 1) (<= 789 ~__ste_client_privateKey2~0) (<= 1 |outgoing_sign_#in~client#1|) (<= |outgoing_getClientId_#in~handle#1| 1) (<= 1 |outgoing_sign_~msg#1|) (<= 1 |outgoing___utac_acc__SignForward_spec__1_#in~msg#1|) (= ~queue_empty~0 1) (<= 1 |outgoing_~msg#1|) (= ~__SELECTED_FEATURE_Base~0 0) (= ~__ste_client_forwardReceiver0~0 0) (<= |outgoing_mail_~client#1| 1) (= ~__ste_Client_Keyring2_User0~0 0) (= ~rjh~0 2) (= 0 ~__ste_Client_AddressBook0_Address1~0) (<= 0 ~__ste_Client_AddressBook1_Alias0~0) (= ~__ste_Client_AddressBook2_Address0~0 0) (= ~__ste_Client_Keyring1_PublicKey1~0 0) (<= 0 ~queued_client~0) (<= ~__ste_Client_AddressBook1_Alias0~0 0) (= ~__ste_Client_Keyring2_PublicKey0~0 0) (<= 0 ~__ste_email_isSignatureVerified0~0) (= ~__ste_Client_AddressBook1_Address0~0 0) (<= 0 ~__ste_client_forwardReceiver2~0) (= ~__ste_client_name2~0.base 0) (<= |outgoing_mail_~msg#1| 1) (<= ~__ste_email_encryptionKey0~0 0) (= ~__ste_email_subject1~0.base 0) (<= ~__ste_ClientKeyring_size0~0 0) (= ~__ste_client_privateKey0~0 |outgoing___utac_acc__SignForward_spec__1_~tmp~0#1|) (<= |outgoing_mail_#in~client#1| 1) (<= |outgoing_outgoing__wrappee__Keys_#in~client#1| 1) (= ~__ste_Client_Keyring2_User2~0 0) (= ~head~0.base 0) (<= ~__ste_client_forwardReceiver1~0 0) (= ~__ste_Client_Keyring1_User1~0 0) (= |#NULL.offset| 0) (<= |outgoing_sign_#in~msg#1| 1) (<= |old(~__ste_email_isSigned1~0)| 0) (= ~__ste_Client_AddressBook2_Alias2~0 0) (<= |outgoing_#in~client#1| 1) (<= ~__ste_Client_Keyring2_User1~0 0) (<= 0 ~__ste_email_isSigned0~0) (<= 0 ~__ste_client_autoResponse2~0) (= ~__ste_email_subject1~0.offset 0) (= ~__ste_Client_AddressBook0_Alias2~0 0) (= ~__ste_email_isEncrypted0~0 0) (<= 0 ~__ste_Client_Keyring2_User1~0) (<= |outgoing_~msg#1| 1) (= ~queued_message~0 0) (= ~__ste_Client_AddressBook1_Address1~0 0) (<= |outgoing_outgoing__wrappee__Keys_~msg#1| 1) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_~tmp~11#1| 2147483648)) (= 0 ~__ste_Client_AddressBook0_Address0~0) (= ~__ste_client_outbuffer1~0 0) (= ~__ste_Client_AddressBook0_Alias1~0 0) (<= 0 ~__ste_ClientKeyring_size0~0) (<= 1 |outgoing_getClientId_#in~handle#1|) (= ~__GUIDSL_ROOT_PRODUCTION~0 0) (<= |old(~__ste_email_isSignatureVerified1~0)| 0) (<= |outgoing_getClientId_~handle#1| 1) (<= 1 |outgoing_sign_#in~msg#1|) (<= 1 |outgoing_#in~client#1|) (<= |outgoing_~client#1| 1) (<= 0 ~__ste_client_forwardReceiver1~0) (<= 1 |outgoing_mail_~__utac__ad__arg2~0#1|) (= ~__ste_client_name0~0.base 0) (= ~__ste_email_id1~0 0) (<= 0 |old(~__ste_email_isSignatureVerified1~0)|) (= ~__ste_client_outbuffer2~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~client#1|) (<= ~bob~0 1) (<= 0 |old(~__ste_email_isSigned1~0)|) (<= |old(~__ste_email_signKey1~0)| 0) (<= 0 (+ ~__ste_client_idCounter0~0 2147483648)) (<= 0 |outgoing___utac_acc__SignForward_spec__1_~tmp___0~0#1|) (<= ~__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) (= ~__SELECTED_FEATURE_AutoResponder~0 0) (<= ~__ste_client_autoResponse2~0 0) (= ~__ste_email_encryptionKey1~0 0) (= ~__ste_client_autoResponse0~0 0) (= ~__ste_email_body1~0.base 0) (<= 1 ~bob~0) (= ~__ste_ClientKeyring_size2~0 0) (<= 0 |old(~__ste_email_signKey1~0)|) (<= 0 ~__ste_email_encryptionKey0~0) (= |#NULL.base| 0) (<= |outgoing_outgoing__wrappee__Keys_#in~msg#1| 1) (= |outgoing___utac_acc__SignForward_spec__1_~tmp~0#1| 0) (<= ~queued_client~0 0))' at error location [2022-11-03 02:22:19,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:19,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:19,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-03 02:22:19,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989302780] [2022-11-03 02:22:19,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:19,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:22:19,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:19,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:22:19,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2294, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 02:22:19,162 INFO L87 Difference]: Start difference. First operand 182 states and 261 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:22:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:19,434 INFO L93 Difference]: Finished difference Result 486 states and 750 transitions. [2022-11-03 02:22:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:22:19,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 62 [2022-11-03 02:22:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:19,438 INFO L225 Difference]: With dead ends: 486 [2022-11-03 02:22:19,438 INFO L226 Difference]: Without dead ends: 432 [2022-11-03 02:22:19,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 202.1s TimeCoverageRelationStatistics Valid=156, Invalid=2294, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 02:22:19,441 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 259 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:19,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 576 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:22:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-03 02:22:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 417. [2022-11-03 02:22:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 288 states have (on average 1.5347222222222223) internal successors, (442), 289 states have internal predecessors, (442), 112 states have call successors, (112), 16 states have call predecessors, (112), 16 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2022-11-03 02:22:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 665 transitions. [2022-11-03 02:22:19,475 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 665 transitions. Word has length 62 [2022-11-03 02:22:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:19,475 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 665 transitions. [2022-11-03 02:22:19,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:22:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 665 transitions. [2022-11-03 02:22:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:22:19,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:19,479 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] [2022-11-03 02:22:19,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:22:19,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f0bf4-79ed-4d22-8c67-a71409c74b43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:19,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:19,709 INFO L85 PathProgramCache]: Analyzing trace with hash -356587917, now seen corresponding path program 1 times [2022-11-03 02:22:19,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:19,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631821289] [2022-11-03 02:22:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:19,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:19,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:19,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631821289] [2022-11-03 02:22:19,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631821289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:19,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:19,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:19,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484218777] [2022-11-03 02:22:19,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:19,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:19,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:19,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:19,850 INFO L87 Difference]: Start difference. First operand 417 states and 665 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:19,974 INFO L93 Difference]: Finished difference Result 1039 states and 1688 transitions. [2022-11-03 02:22:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:19,975 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 68 [2022-11-03 02:22:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:19,985 INFO L225 Difference]: With dead ends: 1039 [2022-11-03 02:22:19,985 INFO L226 Difference]: Without dead ends: 654 [2022-11-03 02:22:19,986 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 [2022-11-03 02:22:19,988 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 55 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:19,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 340 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-11-03 02:22:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 649. [2022-11-03 02:22:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 456 states have (on average 1.5460526315789473) internal successors, (705), 457 states have internal predecessors, (705), 176 states have call successors, (176), 16 states have call predecessors, (176), 16 states have return successors, (175), 175 states have call predecessors, (175), 175 states have call successors, (175) [2022-11-03 02:22:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1056 transitions. [2022-11-03 02:22:20,060 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1056 transitions. Word has length 68 [2022-11-03 02:22:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:20,063 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 1056 transitions. [2022-11-03 02:22:20,063 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1056 transitions. [2022-11-03 02:22:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:22:20,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:20,070 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] [2022-11-03 02:22:20,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:22:20,070 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash -962942224, now seen corresponding path program 1 times [2022-11-03 02:22:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:20,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865457916] [2022-11-03 02:22:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:20,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:20,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:20,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865457916] [2022-11-03 02:22:20,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865457916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:20,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:20,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:20,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157761710] [2022-11-03 02:22:20,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:20,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:20,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:20,169 INFO L87 Difference]: Start difference. First operand 649 states and 1056 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:20,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:20,284 INFO L93 Difference]: Finished difference Result 1596 states and 2631 transitions. [2022-11-03 02:22:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:20,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 69 [2022-11-03 02:22:20,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:20,293 INFO L225 Difference]: With dead ends: 1596 [2022-11-03 02:22:20,293 INFO L226 Difference]: Without dead ends: 1009 [2022-11-03 02:22:20,295 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 [2022-11-03 02:22:20,297 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 53 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:20,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 330 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-11-03 02:22:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 1004. [2022-11-03 02:22:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 716 states have (on average 1.5488826815642458) internal successors, (1109), 717 states have internal predecessors, (1109), 271 states have call successors, (271), 16 states have call predecessors, (271), 16 states have return successors, (270), 270 states have call predecessors, (270), 270 states have call successors, (270) [2022-11-03 02:22:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1650 transitions. [2022-11-03 02:22:20,374 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1650 transitions. Word has length 69 [2022-11-03 02:22:20,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:20,375 INFO L495 AbstractCegarLoop]: Abstraction has 1004 states and 1650 transitions. [2022-11-03 02:22:20,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:20,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1650 transitions. [2022-11-03 02:22:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:22:20,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:20,381 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] [2022-11-03 02:22:20,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:22:20,381 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash 478805489, now seen corresponding path program 1 times [2022-11-03 02:22:20,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:20,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363482211] [2022-11-03 02:22:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:20,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:20,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:20,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363482211] [2022-11-03 02:22:20,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363482211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:20,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:20,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:20,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747505136] [2022-11-03 02:22:20,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:20,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:20,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:20,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:20,473 INFO L87 Difference]: Start difference. First operand 1004 states and 1650 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:20,612 INFO L93 Difference]: Finished difference Result 2394 states and 3975 transitions. [2022-11-03 02:22:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:20,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 70 [2022-11-03 02:22:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:20,622 INFO L225 Difference]: With dead ends: 2394 [2022-11-03 02:22:20,622 INFO L226 Difference]: Without dead ends: 1532 [2022-11-03 02:22:20,625 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 [2022-11-03 02:22:20,626 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 51 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:20,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 324 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2022-11-03 02:22:20,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1527. [2022-11-03 02:22:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1116 states have (on average 1.5510752688172043) internal successors, (1731), 1117 states have internal predecessors, (1731), 394 states have call successors, (394), 16 states have call predecessors, (394), 16 states have return successors, (393), 393 states have call predecessors, (393), 393 states have call successors, (393) [2022-11-03 02:22:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2518 transitions. [2022-11-03 02:22:20,755 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2518 transitions. Word has length 70 [2022-11-03 02:22:20,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:20,756 INFO L495 AbstractCegarLoop]: Abstraction has 1527 states and 2518 transitions. [2022-11-03 02:22:20,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2518 transitions. [2022-11-03 02:22:20,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:22:20,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:20,761 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] [2022-11-03 02:22:20,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:22:20,762 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:20,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:20,762 INFO L85 PathProgramCache]: Analyzing trace with hash -538254001, now seen corresponding path program 1 times [2022-11-03 02:22:20,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:20,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387840009] [2022-11-03 02:22:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:20,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:20,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387840009] [2022-11-03 02:22:20,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387840009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:20,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:20,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:20,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896522928] [2022-11-03 02:22:20,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:20,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:20,838 INFO L87 Difference]: Start difference. First operand 1527 states and 2518 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:21,030 INFO L93 Difference]: Finished difference Result 3604 states and 6003 transitions. [2022-11-03 02:22:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:21,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 71 [2022-11-03 02:22:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:21,043 INFO L225 Difference]: With dead ends: 3604 [2022-11-03 02:22:21,044 INFO L226 Difference]: Without dead ends: 2356 [2022-11-03 02:22:21,048 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 [2022-11-03 02:22:21,049 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 49 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:21,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 324 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2022-11-03 02:22:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2351. [2022-11-03 02:22:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 1761 states have (on average 1.5519591141396933) internal successors, (2733), 1762 states have internal predecessors, (2733), 573 states have call successors, (573), 16 states have call predecessors, (573), 16 states have return successors, (572), 572 states have call predecessors, (572), 572 states have call successors, (572) [2022-11-03 02:22:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 3878 transitions. [2022-11-03 02:22:21,224 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 3878 transitions. Word has length 71 [2022-11-03 02:22:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:21,225 INFO L495 AbstractCegarLoop]: Abstraction has 2351 states and 3878 transitions. [2022-11-03 02:22:21,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 3878 transitions. [2022-11-03 02:22:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 02:22:21,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:21,231 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] [2022-11-03 02:22:21,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:22:21,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:21,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:21,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1794849259, now seen corresponding path program 1 times [2022-11-03 02:22:21,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:21,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840669973] [2022-11-03 02:22:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:21,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:21,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840669973] [2022-11-03 02:22:21,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840669973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:21,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:21,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524930429] [2022-11-03 02:22:21,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:21,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:21,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:21,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:21,330 INFO L87 Difference]: Start difference. First operand 2351 states and 3878 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:21,591 INFO L93 Difference]: Finished difference Result 5815 states and 9675 transitions. [2022-11-03 02:22:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:21,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 72 [2022-11-03 02:22:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:21,613 INFO L225 Difference]: With dead ends: 5815 [2022-11-03 02:22:21,613 INFO L226 Difference]: Without dead ends: 3886 [2022-11-03 02:22:21,620 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 [2022-11-03 02:22:21,621 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 47 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:21,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 339 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3886 states. [2022-11-03 02:22:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3886 to 3881. [2022-11-03 02:22:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3881 states, 2915 states have (on average 1.539622641509434) internal successors, (4488), 2916 states have internal predecessors, (4488), 949 states have call successors, (949), 16 states have call predecessors, (949), 16 states have return successors, (948), 948 states have call predecessors, (948), 948 states have call successors, (948) [2022-11-03 02:22:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3881 states to 3881 states and 6385 transitions. [2022-11-03 02:22:21,983 INFO L78 Accepts]: Start accepts. Automaton has 3881 states and 6385 transitions. Word has length 72 [2022-11-03 02:22:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:21,984 INFO L495 AbstractCegarLoop]: Abstraction has 3881 states and 6385 transitions. [2022-11-03 02:22:21,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3881 states and 6385 transitions. [2022-11-03 02:22:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:22:21,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:21,994 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] [2022-11-03 02:22:21,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:22:21,994 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:21,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:21,995 INFO L85 PathProgramCache]: Analyzing trace with hash -148241109, now seen corresponding path program 1 times [2022-11-03 02:22:21,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:21,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352774846] [2022-11-03 02:22:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:21,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:22,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:22,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352774846] [2022-11-03 02:22:22,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352774846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:22,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:22,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:22,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371644803] [2022-11-03 02:22:22,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:22,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:22,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:22,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:22,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:22,091 INFO L87 Difference]: Start difference. First operand 3881 states and 6385 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:22,535 INFO L93 Difference]: Finished difference Result 9676 states and 16072 transitions. [2022-11-03 02:22:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:22,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 73 [2022-11-03 02:22:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:22,572 INFO L225 Difference]: With dead ends: 9676 [2022-11-03 02:22:22,573 INFO L226 Difference]: Without dead ends: 6483 [2022-11-03 02:22:22,583 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 [2022-11-03 02:22:22,584 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 45 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:22,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 329 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6483 states. [2022-11-03 02:22:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6483 to 6478. [2022-11-03 02:22:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6478 states, 4906 states have (on average 1.534651447207501) internal successors, (7529), 4907 states have internal predecessors, (7529), 1555 states have call successors, (1555), 16 states have call predecessors, (1555), 16 states have return successors, (1554), 1554 states have call predecessors, (1554), 1554 states have call successors, (1554) [2022-11-03 02:22:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6478 states to 6478 states and 10638 transitions. [2022-11-03 02:22:23,140 INFO L78 Accepts]: Start accepts. Automaton has 6478 states and 10638 transitions. Word has length 73 [2022-11-03 02:22:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:23,140 INFO L495 AbstractCegarLoop]: Abstraction has 6478 states and 10638 transitions. [2022-11-03 02:22:23,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6478 states and 10638 transitions. [2022-11-03 02:22:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:22:23,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:23,149 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] [2022-11-03 02:22:23,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:22:23,150 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:23,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1120522163, now seen corresponding path program 1 times [2022-11-03 02:22:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:23,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426055294] [2022-11-03 02:22:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:23,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:23,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:23,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426055294] [2022-11-03 02:22:23,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426055294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:23,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:23,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:23,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486429323] [2022-11-03 02:22:23,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:23,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:23,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:23,295 INFO L87 Difference]: Start difference. First operand 6478 states and 10638 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:24,078 INFO L93 Difference]: Finished difference Result 16928 states and 27990 transitions. [2022-11-03 02:22:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 74 [2022-11-03 02:22:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:24,164 INFO L225 Difference]: With dead ends: 16928 [2022-11-03 02:22:24,164 INFO L226 Difference]: Without dead ends: 11427 [2022-11-03 02:22:24,184 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 [2022-11-03 02:22:24,185 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 43 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:24,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 339 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11427 states. [2022-11-03 02:22:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11427 to 11422. [2022-11-03 02:22:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11422 states, 8647 states have (on average 1.5207586446166301) internal successors, (13150), 8648 states have internal predecessors, (13150), 2758 states have call successors, (2758), 16 states have call predecessors, (2758), 16 states have return successors, (2757), 2757 states have call predecessors, (2757), 2757 states have call successors, (2757) [2022-11-03 02:22:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11422 states to 11422 states and 18665 transitions. [2022-11-03 02:22:25,212 INFO L78 Accepts]: Start accepts. Automaton has 11422 states and 18665 transitions. Word has length 74 [2022-11-03 02:22:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:25,213 INFO L495 AbstractCegarLoop]: Abstraction has 11422 states and 18665 transitions. [2022-11-03 02:22:25,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 11422 states and 18665 transitions. [2022-11-03 02:22:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:22:25,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:25,225 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] [2022-11-03 02:22:25,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:22:25,225 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:25,226 INFO L85 PathProgramCache]: Analyzing trace with hash -472504342, now seen corresponding path program 1 times [2022-11-03 02:22:25,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:25,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951999126] [2022-11-03 02:22:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:25,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:25,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:25,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951999126] [2022-11-03 02:22:25,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951999126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:25,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:25,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:25,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907051603] [2022-11-03 02:22:25,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:25,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:25,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:25,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:25,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:25,320 INFO L87 Difference]: Start difference. First operand 11422 states and 18665 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:26,968 INFO L93 Difference]: Finished difference Result 30247 states and 49756 transitions. [2022-11-03 02:22:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:26,969 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 75 [2022-11-03 02:22:26,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:27,064 INFO L225 Difference]: With dead ends: 30247 [2022-11-03 02:22:27,064 INFO L226 Difference]: Without dead ends: 20254 [2022-11-03 02:22:27,102 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 [2022-11-03 02:22:27,103 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 41 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:27,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 329 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20254 states. [2022-11-03 02:22:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20254 to 20249. [2022-11-03 02:22:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20249 states, 15435 states have (on average 1.5127308066083576) internal successors, (23349), 15436 states have internal predecessors, (23349), 4797 states have call successors, (4797), 16 states have call predecessors, (4797), 16 states have return successors, (4796), 4796 states have call predecessors, (4796), 4796 states have call successors, (4796) [2022-11-03 02:22:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20249 states to 20249 states and 32942 transitions. [2022-11-03 02:22:28,970 INFO L78 Accepts]: Start accepts. Automaton has 20249 states and 32942 transitions. Word has length 75 [2022-11-03 02:22:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:28,972 INFO L495 AbstractCegarLoop]: Abstraction has 20249 states and 32942 transitions. [2022-11-03 02:22:28,972 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:28,972 INFO L276 IsEmpty]: Start isEmpty. Operand 20249 states and 32942 transitions. [2022-11-03 02:22:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:22:28,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:28,989 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] [2022-11-03 02:22:28,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:22:28,990 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:28,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash -844489487, now seen corresponding path program 1 times [2022-11-03 02:22:28,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:28,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555134057] [2022-11-03 02:22:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:28,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:29,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:29,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555134057] [2022-11-03 02:22:29,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555134057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:29,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:29,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:29,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172024075] [2022-11-03 02:22:29,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:29,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:29,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:29,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:29,090 INFO L87 Difference]: Start difference. First operand 20249 states and 32942 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:31,347 INFO L93 Difference]: Finished difference Result 54959 states and 89848 transitions. [2022-11-03 02:22:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:31,347 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 76 [2022-11-03 02:22:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:31,532 INFO L225 Difference]: With dead ends: 54959 [2022-11-03 02:22:31,532 INFO L226 Difference]: Without dead ends: 36694 [2022-11-03 02:22:31,584 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 [2022-11-03 02:22:31,584 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 39 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:31,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 329 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2022-11-03 02:22:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 36689. [2022-11-03 02:22:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36689 states, 28160 states have (on average 1.5018821022727273) internal successors, (42293), 28161 states have internal predecessors, (42293), 8512 states have call successors, (8512), 16 states have call predecessors, (8512), 16 states have return successors, (8511), 8511 states have call predecessors, (8511), 8511 states have call successors, (8511) [2022-11-03 02:22:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36689 states to 36689 states and 59316 transitions. [2022-11-03 02:22:34,637 INFO L78 Accepts]: Start accepts. Automaton has 36689 states and 59316 transitions. Word has length 76 [2022-11-03 02:22:34,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:34,638 INFO L495 AbstractCegarLoop]: Abstraction has 36689 states and 59316 transitions. [2022-11-03 02:22:34,638 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 36689 states and 59316 transitions. [2022-11-03 02:22:34,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:22:34,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:34,651 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] [2022-11-03 02:22:34,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:22:34,651 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash 9354858, now seen corresponding path program 1 times [2022-11-03 02:22:34,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:34,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14095156] [2022-11-03 02:22:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:34,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:34,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:34,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14095156] [2022-11-03 02:22:34,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14095156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:34,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:34,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:34,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992772237] [2022-11-03 02:22:34,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:34,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:34,747 INFO L87 Difference]: Start difference. First operand 36689 states and 59316 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:38,413 INFO L93 Difference]: Finished difference Result 67576 states and 109429 transitions. [2022-11-03 02:22:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:38,414 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2022-11-03 02:22:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:38,724 INFO L225 Difference]: With dead ends: 67576 [2022-11-03 02:22:38,724 INFO L226 Difference]: Without dead ends: 67522 [2022-11-03 02:22:38,746 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 [2022-11-03 02:22:38,747 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 37 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:38,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 329 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67522 states. [2022-11-03 02:22:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67522 to 67517. [2022-11-03 02:22:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67517 states, 52189 states have (on average 1.4878422656115273) internal successors, (77649), 52190 states have internal predecessors, (77649), 15311 states have call successors, (15311), 16 states have call predecessors, (15311), 16 states have return successors, (15310), 15310 states have call predecessors, (15310), 15310 states have call successors, (15310) [2022-11-03 02:22:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67517 states to 67517 states and 108270 transitions. [2022-11-03 02:22:44,532 INFO L78 Accepts]: Start accepts. Automaton has 67517 states and 108270 transitions. Word has length 77 [2022-11-03 02:22:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:44,533 INFO L495 AbstractCegarLoop]: Abstraction has 67517 states and 108270 transitions. [2022-11-03 02:22:44,533 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:22:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 67517 states and 108270 transitions. [2022-11-03 02:22:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 02:22:44,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:44,552 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] [2022-11-03 02:22:44,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:22:44,552 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:44,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1727534414, now seen corresponding path program 1 times [2022-11-03 02:22:44,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:44,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142517426] [2022-11-03 02:22:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:44,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:22:46,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:46,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142517426] [2022-11-03 02:22:46,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142517426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:46,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:46,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-03 02:22:46,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132904530] [2022-11-03 02:22:46,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:46,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:22:46,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:46,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:22:46,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:22:46,120 INFO L87 Difference]: Start difference. First operand 67517 states and 108270 transitions. Second operand has 19 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 14 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-03 02:22:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:52,016 INFO L93 Difference]: Finished difference Result 67582 states and 108360 transitions. [2022-11-03 02:22:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:22:52,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 14 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 78 [2022-11-03 02:22:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:52,339 INFO L225 Difference]: With dead ends: 67582 [2022-11-03 02:22:52,339 INFO L226 Difference]: Without dead ends: 67548 [2022-11-03 02:22:52,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:22:52,367 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 232 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:52,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 2019 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:22:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67548 states. [2022-11-03 02:22:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67548 to 67532. [2022-11-03 02:22:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67532 states, 52198 states have (on average 1.4877389938311814) internal successors, (77657), 52198 states have internal predecessors, (77657), 15315 states have call successors, (15315), 19 states have call predecessors, (15315), 18 states have return successors, (15314), 15314 states have call predecessors, (15314), 15314 states have call successors, (15314) [2022-11-03 02:22:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67532 states to 67532 states and 108286 transitions. [2022-11-03 02:22:59,621 INFO L78 Accepts]: Start accepts. Automaton has 67532 states and 108286 transitions. Word has length 78 [2022-11-03 02:22:59,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:59,621 INFO L495 AbstractCegarLoop]: Abstraction has 67532 states and 108286 transitions. [2022-11-03 02:22:59,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 14 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-03 02:22:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand 67532 states and 108286 transitions. [2022-11-03 02:22:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:22:59,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:59,695 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-11-03 02:22:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:22:59,695 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash 262295376, now seen corresponding path program 1 times [2022-11-03 02:22:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128358732] [2022-11-03 02:22:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:59,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:22:59,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128358732] [2022-11-03 02:22:59,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128358732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:59,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:59,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:22:59,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575461487] [2022-11-03 02:23:00,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:23:00,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:23:00,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:23:00,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:23:00,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:23:00,001 INFO L87 Difference]: Start difference. First operand 67532 states and 108286 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18)