./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 e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/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_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0 --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-e04fb08 [2022-11-16 20:01:53,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:01:53,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:01:53,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:01:53,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:01:53,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:01:53,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:01:53,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:01:53,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:01:53,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:01:53,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:01:53,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:01:53,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:01:53,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:01:53,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:01:53,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:01:53,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:01:53,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:01:53,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:01:53,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:01:53,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:01:53,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:01:53,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:01:53,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:01:53,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:01:53,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:01:53,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:01:53,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:01:53,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:01:53,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:01:53,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:01:53,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:01:53,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:01:53,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:01:53,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:01:53,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:01:53,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:01:53,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:01:53,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:01:53,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:01:53,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:01:53,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:01:53,951 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:01:53,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:01:53,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:01:53,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:01:53,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:01:53,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:01:53,954 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:01:53,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:01:53,954 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:01:53,955 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:01:53,956 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:01:53,956 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:01:53,957 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:01:53,957 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:01:53,957 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:01:53,958 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:01:53,958 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:01:53,958 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:01:53,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:01:53,959 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:01:53,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:01:53,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:01:53,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:01:53,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:01:53,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:01:53,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:01:53,961 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:01:53,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:01:53,962 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:01:53,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:01:53,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:01:53,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:01:53,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:01:53,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:01:53,964 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:01:53,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:01:53,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:01:53,965 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:01:53,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:01:53,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:01:53,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:01:53,966 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_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4d75af8ac92d9f5b92cf5fbd6315f6202b8108aa1e42fc32d65f286c89fdf2f [2022-11-16 20:01:54,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:01:54,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:01:54,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:01:54,328 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:01:54,329 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:01:54,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/product-lines/email_spec4_product13.cil.c [2022-11-16 20:01:54,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/data/41f9caa46/4814340636fa495b98432f783e1f5521/FLAG9ec9a0fd8 [2022-11-16 20:01:55,141 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:01:55,142 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/sv-benchmarks/c/product-lines/email_spec4_product13.cil.c [2022-11-16 20:01:55,160 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/data/41f9caa46/4814340636fa495b98432f783e1f5521/FLAG9ec9a0fd8 [2022-11-16 20:01:55,347 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/data/41f9caa46/4814340636fa495b98432f783e1f5521 [2022-11-16 20:01:55,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:01:55,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:01:55,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:01:55,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:01:55,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:01:55,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:01:55" (1/1) ... [2022-11-16 20:01:55,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23109019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:55, skipping insertion in model container [2022-11-16 20:01:55,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:01:55" (1/1) ... [2022-11-16 20:01:55,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:01:55,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:01:56,027 WARN L229 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_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/sv-benchmarks/c/product-lines/email_spec4_product13.cil.c[42804,42817] [2022-11-16 20:01:56,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:01:56,128 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:01:56,265 WARN L229 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_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/sv-benchmarks/c/product-lines/email_spec4_product13.cil.c[42804,42817] [2022-11-16 20:01:56,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:01:56,325 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:01:56,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56 WrapperNode [2022-11-16 20:01:56,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:01:56,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:01:56,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:01:56,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:01:56,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,419 INFO L138 Inliner]: procedures = 124, calls = 189, calls flagged for inlining = 53, calls inlined = 44, statements flattened = 837 [2022-11-16 20:01:56,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:01:56,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:01:56,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:01:56,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:01:56,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,492 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:01:56,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:01:56,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:01:56,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:01:56,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (1/1) ... [2022-11-16 20:01:56,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:01:56,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:01:56,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:01:56,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:01:56,622 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-16 20:01:56,622 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-16 20:01:56,622 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-16 20:01:56,623 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-16 20:01:56,623 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-16 20:01:56,623 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-16 20:01:56,623 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-16 20:01:56,623 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-16 20:01:56,623 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-16 20:01:56,624 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-16 20:01:56,624 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-16 20:01:56,624 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-16 20:01:56,624 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-16 20:01:56,624 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-16 20:01:56,625 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-16 20:01:56,625 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-16 20:01:56,625 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-16 20:01:56,625 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-16 20:01:56,625 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-16 20:01:56,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:01:56,626 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-16 20:01:56,626 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-16 20:01:56,626 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-16 20:01:56,626 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-16 20:01:56,626 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-16 20:01:56,626 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-16 20:01:56,627 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-16 20:01:56,627 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-16 20:01:56,627 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-16 20:01:56,627 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-16 20:01:56,627 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-16 20:01:56,627 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-16 20:01:56,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:01:56,628 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-16 20:01:56,628 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-16 20:01:56,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:01:56,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:01:56,875 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:01:56,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:01:57,799 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:01:58,241 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:01:58,242 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 20:01:58,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:01:58 BoogieIcfgContainer [2022-11-16 20:01:58,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:01:58,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:01:58,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:01:58,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:01:58,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:01:55" (1/3) ... [2022-11-16 20:01:58,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afaa417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:01:58, skipping insertion in model container [2022-11-16 20:01:58,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:56" (2/3) ... [2022-11-16 20:01:58,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afaa417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:01:58, skipping insertion in model container [2022-11-16 20:01:58,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:01:58" (3/3) ... [2022-11-16 20:01:58,256 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec4_product13.cil.c [2022-11-16 20:01:58,274 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:01:58,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:01:58,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:01:58,335 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;@6568465f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:01:58,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:01:58,340 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) [2022-11-16 20:01:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 20:01:58,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:58,354 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] [2022-11-16 20:01:58,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:01:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1824651082, now seen corresponding path program 1 times [2022-11-16 20:01:58,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:58,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485732799] [2022-11-16 20:01:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:58,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:01:58,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:58,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485732799] [2022-11-16 20:01:58,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485732799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:01:58,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:01:58,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:01:58,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692814511] [2022-11-16 20:01:58,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:01:58,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 20:01:58,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:01:58,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 20:01:58,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:01:58,780 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) [2022-11-16 20:01:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:01:58,886 INFO L93 Difference]: Finished difference Result 197 states and 260 transitions. [2022-11-16 20:01:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 20:01:58,889 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 [2022-11-16 20:01:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:01:58,899 INFO L225 Difference]: With dead ends: 197 [2022-11-16 20:01:58,900 INFO L226 Difference]: Without dead ends: 137 [2022-11-16 20:01:58,904 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 [2022-11-16 20:01:58,907 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 [2022-11-16 20:01:58,909 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] [2022-11-16 20:01:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-16 20:01:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-16 20:01:58,955 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) [2022-11-16 20:01:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 184 transitions. [2022-11-16 20:01:58,960 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 184 transitions. Word has length 55 [2022-11-16 20:01:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:01:58,961 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 184 transitions. [2022-11-16 20:01:58,962 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) [2022-11-16 20:01:58,962 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 184 transitions. [2022-11-16 20:01:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 20:01:58,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:58,966 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] [2022-11-16 20:01:58,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:01:58,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:01:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:58,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1755402641, now seen corresponding path program 1 times [2022-11-16 20:01:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:58,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189784068] [2022-11-16 20:01:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:58,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:01:59,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:59,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189784068] [2022-11-16 20:01:59,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189784068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:01:59,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:01:59,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:01:59,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666883081] [2022-11-16 20:01:59,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:01:59,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:01:59,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:01:59,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:01:59,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:01:59,290 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) [2022-11-16 20:01:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:01:59,395 INFO L93 Difference]: Finished difference Result 193 states and 248 transitions. [2022-11-16 20:01:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:01:59,396 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 [2022-11-16 20:01:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:01:59,398 INFO L225 Difference]: With dead ends: 193 [2022-11-16 20:01:59,398 INFO L226 Difference]: Without dead ends: 139 [2022-11-16 20:01:59,399 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 [2022-11-16 20:01:59,400 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 0 mSDsluCounter, 160 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 [2022-11-16 20:01:59,401 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] [2022-11-16 20:01:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-16 20:01:59,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-11-16 20:01:59,423 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) [2022-11-16 20:01:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 186 transitions. [2022-11-16 20:01:59,430 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 186 transitions. Word has length 56 [2022-11-16 20:01:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:01:59,431 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 186 transitions. [2022-11-16 20:01:59,432 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) [2022-11-16 20:01:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 186 transitions. [2022-11-16 20:01:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 20:01:59,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:59,441 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] [2022-11-16 20:01:59,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:01:59,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:01:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:59,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2104566704, now seen corresponding path program 1 times [2022-11-16 20:01:59,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:59,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560372460] [2022-11-16 20:01:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:59,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:01:59,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:59,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560372460] [2022-11-16 20:01:59,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560372460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:01:59,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:01:59,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:01:59,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924957627] [2022-11-16 20:01:59,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:01:59,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:01:59,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:01:59,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:01:59,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:01:59,583 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) [2022-11-16 20:01:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:01:59,677 INFO L93 Difference]: Finished difference Result 308 states and 431 transitions. [2022-11-16 20:01:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:01:59,678 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 [2022-11-16 20:01:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:01:59,680 INFO L225 Difference]: With dead ends: 308 [2022-11-16 20:01:59,680 INFO L226 Difference]: Without dead ends: 187 [2022-11-16 20:01:59,682 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 [2022-11-16 20:01:59,683 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 57 mSDsluCounter, 155 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 [2022-11-16 20:01:59,683 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] [2022-11-16 20:01:59,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-16 20:01:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2022-11-16 20:01:59,701 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) [2022-11-16 20:01:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 261 transitions. [2022-11-16 20:01:59,703 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 261 transitions. Word has length 61 [2022-11-16 20:01:59,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:01:59,704 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 261 transitions. [2022-11-16 20:01:59,704 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) [2022-11-16 20:01:59,705 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 261 transitions. [2022-11-16 20:01:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 20:01:59,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:59,707 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] [2022-11-16 20:01:59,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:01:59,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:01:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1161933040, now seen corresponding path program 1 times [2022-11-16 20:01:59,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:59,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623753279] [2022-11-16 20:01:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:59,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:01:59,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:59,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623753279] [2022-11-16 20:01:59,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623753279] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:01:59,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399623244] [2022-11-16 20:01:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:59,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:01:59,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:01:59,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:01:59,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:02:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:02:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:02:00,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:02:00,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:02:00,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399623244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:00,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385164629] [2022-11-16 20:02:00,450 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2022-11-16 20:02:00,450 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:00,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:00,463 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:00,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:40,095 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-16 20:02:40,419 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-16 20:02:40,734 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 466 for LOIs [2022-11-16 20:02:51,633 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 459 for LOIs [2022-11-16 20:03:03,877 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 444 for LOIs [2022-11-16 20:03:04,175 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 245 for LOIs [2022-11-16 20:03:04,297 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 243 for LOIs [2022-11-16 20:03:04,344 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:03:10,135 WARN L233 SmtUtils]: Spent 5.74s 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) [2022-11-16 20:03:27,983 WARN L233 SmtUtils]: Spent 5.26s 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) [2022-11-16 20:03:42,172 WARN L233 SmtUtils]: Spent 5.95s 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) [2022-11-16 20:03:54,026 WARN L233 SmtUtils]: Spent 6.88s 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) [2022-11-16 20:04:05,103 WARN L233 SmtUtils]: Spent 6.09s 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) [2022-11-16 20:04:11,938 WARN L233 SmtUtils]: Spent 6.53s 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) [2022-11-16 20:04:17,386 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 565 DAG size of output: 323 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:04:22,859 WARN L233 SmtUtils]: Spent 5.16s 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) [2022-11-16 20:04:31,333 WARN L233 SmtUtils]: Spent 8.14s 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) [2022-11-16 20:04:39,808 WARN L233 SmtUtils]: Spent 8.11s 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) [2022-11-16 20:04:48,318 WARN L233 SmtUtils]: Spent 8.13s 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) [2022-11-16 20:04:53,791 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 566 DAG size of output: 324 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:05:18,001 WARN L233 SmtUtils]: Spent 7.07s 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) [2022-11-16 20:05:53,397 WARN L233 SmtUtils]: Spent 9.38s 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) [2022-11-16 20:06:09,893 WARN L233 SmtUtils]: Spent 8.64s 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) [2022-11-16 20:06:16,625 WARN L233 SmtUtils]: Spent 6.11s 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) [2022-11-16 20:06:16,632 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 [2022-11-16 20:06:16,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:06:16,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:06:16,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 20:06:16,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041356635] [2022-11-16 20:06:16,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:06:16,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:06:16,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:16,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:06:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2294, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 20:06:16,636 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) [2022-11-16 20:06:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:16,939 INFO L93 Difference]: Finished difference Result 486 states and 750 transitions. [2022-11-16 20:06:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:06:16,940 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 [2022-11-16 20:06:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:16,943 INFO L225 Difference]: With dead ends: 486 [2022-11-16 20:06:16,943 INFO L226 Difference]: Without dead ends: 432 [2022-11-16 20:06:16,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 192.2s TimeCoverageRelationStatistics Valid=156, Invalid=2294, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 20:06:16,945 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 259 mSDsluCounter, 351 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 [2022-11-16 20:06:16,946 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] [2022-11-16 20:06:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-16 20:06:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 417. [2022-11-16 20:06:16,977 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) [2022-11-16 20:06:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 665 transitions. [2022-11-16 20:06:16,980 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 665 transitions. Word has length 62 [2022-11-16 20:06:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:16,980 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 665 transitions. [2022-11-16 20:06:16,981 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) [2022-11-16 20:06:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 665 transitions. [2022-11-16 20:06:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 20:06:16,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:16,984 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] [2022-11-16 20:06:16,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 20:06:17,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85fea03d-3f09-445e-a2fb-d3e0b59f2a92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:06:17,192 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash -356587917, now seen corresponding path program 1 times [2022-11-16 20:06:17,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:17,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217353445] [2022-11-16 20:06:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:17,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:17,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217353445] [2022-11-16 20:06:17,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217353445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:17,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:17,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:06:17,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253844409] [2022-11-16 20:06:17,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:17,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:06:17,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:06:17,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:17,278 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) [2022-11-16 20:06:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:17,369 INFO L93 Difference]: Finished difference Result 1039 states and 1688 transitions. [2022-11-16 20:06:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:06:17,369 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 [2022-11-16 20:06:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:17,373 INFO L225 Difference]: With dead ends: 1039 [2022-11-16 20:06:17,373 INFO L226 Difference]: Without dead ends: 654 [2022-11-16 20:06:17,375 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 [2022-11-16 20:06:17,376 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 55 mSDsluCounter, 160 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 [2022-11-16 20:06:17,376 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] [2022-11-16 20:06:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-11-16 20:06:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 649. [2022-11-16 20:06:17,417 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) [2022-11-16 20:06:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1056 transitions. [2022-11-16 20:06:17,421 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1056 transitions. Word has length 68 [2022-11-16 20:06:17,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:17,421 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 1056 transitions. [2022-11-16 20:06:17,421 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) [2022-11-16 20:06:17,422 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1056 transitions. [2022-11-16 20:06:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 20:06:17,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:17,425 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] [2022-11-16 20:06:17,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:06:17,425 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:17,426 INFO L85 PathProgramCache]: Analyzing trace with hash -962942224, now seen corresponding path program 1 times [2022-11-16 20:06:17,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:17,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911322998] [2022-11-16 20:06:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:17,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:17,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:17,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911322998] [2022-11-16 20:06:17,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911322998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:17,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:17,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:06:17,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681847954] [2022-11-16 20:06:17,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:17,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:06:17,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:06:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:17,522 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) [2022-11-16 20:06:17,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:17,635 INFO L93 Difference]: Finished difference Result 1596 states and 2631 transitions. [2022-11-16 20:06:17,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:06:17,635 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 [2022-11-16 20:06:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:17,646 INFO L225 Difference]: With dead ends: 1596 [2022-11-16 20:06:17,647 INFO L226 Difference]: Without dead ends: 1009 [2022-11-16 20:06:17,652 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 [2022-11-16 20:06:17,655 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 53 mSDsluCounter, 155 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 [2022-11-16 20:06:17,656 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] [2022-11-16 20:06:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-11-16 20:06:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 1004. [2022-11-16 20:06:17,735 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) [2022-11-16 20:06:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1650 transitions. [2022-11-16 20:06:17,744 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1650 transitions. Word has length 69 [2022-11-16 20:06:17,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:17,745 INFO L495 AbstractCegarLoop]: Abstraction has 1004 states and 1650 transitions. [2022-11-16 20:06:17,746 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) [2022-11-16 20:06:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1650 transitions. [2022-11-16 20:06:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 20:06:17,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:17,752 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] [2022-11-16 20:06:17,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 20:06:17,752 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:17,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:17,753 INFO L85 PathProgramCache]: Analyzing trace with hash 478805489, now seen corresponding path program 1 times [2022-11-16 20:06:17,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:17,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990311552] [2022-11-16 20:06:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:17,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:17,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:17,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990311552] [2022-11-16 20:06:17,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990311552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:17,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:17,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:06:17,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147979764] [2022-11-16 20:06:17,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:17,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:06:17,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:06:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:17,867 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) [2022-11-16 20:06:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:17,996 INFO L93 Difference]: Finished difference Result 2394 states and 3975 transitions. [2022-11-16 20:06:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:06:17,997 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 [2022-11-16 20:06:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:18,005 INFO L225 Difference]: With dead ends: 2394 [2022-11-16 20:06:18,006 INFO L226 Difference]: Without dead ends: 1532 [2022-11-16 20:06:18,009 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 [2022-11-16 20:06:18,010 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 51 mSDsluCounter, 152 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 [2022-11-16 20:06:18,010 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] [2022-11-16 20:06:18,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2022-11-16 20:06:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1527. [2022-11-16 20:06:18,141 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) [2022-11-16 20:06:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2518 transitions. [2022-11-16 20:06:18,148 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2518 transitions. Word has length 70 [2022-11-16 20:06:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:18,149 INFO L495 AbstractCegarLoop]: Abstraction has 1527 states and 2518 transitions. [2022-11-16 20:06:18,149 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) [2022-11-16 20:06:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2518 transitions. [2022-11-16 20:06:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 20:06:18,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:18,154 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] [2022-11-16 20:06:18,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 20:06:18,155 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash -538254001, now seen corresponding path program 1 times [2022-11-16 20:06:18,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:18,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247836346] [2022-11-16 20:06:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:18,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:18,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247836346] [2022-11-16 20:06:18,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247836346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:18,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:18,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:06:18,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176043719] [2022-11-16 20:06:18,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:18,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:06:18,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:06:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:18,273 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) [2022-11-16 20:06:18,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:18,456 INFO L93 Difference]: Finished difference Result 3604 states and 6003 transitions. [2022-11-16 20:06:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:06:18,457 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 [2022-11-16 20:06:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:18,471 INFO L225 Difference]: With dead ends: 3604 [2022-11-16 20:06:18,472 INFO L226 Difference]: Without dead ends: 2356 [2022-11-16 20:06:18,476 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 [2022-11-16 20:06:18,477 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 49 mSDsluCounter, 152 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 [2022-11-16 20:06:18,477 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] [2022-11-16 20:06:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2022-11-16 20:06:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2351. [2022-11-16 20:06:18,661 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) [2022-11-16 20:06:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 3878 transitions. [2022-11-16 20:06:18,678 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 3878 transitions. Word has length 71 [2022-11-16 20:06:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:18,678 INFO L495 AbstractCegarLoop]: Abstraction has 2351 states and 3878 transitions. [2022-11-16 20:06:18,679 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) [2022-11-16 20:06:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 3878 transitions. [2022-11-16 20:06:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 20:06:18,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:18,690 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] [2022-11-16 20:06:18,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 20:06:18,690 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:18,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1794849259, now seen corresponding path program 1 times [2022-11-16 20:06:18,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:18,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97041677] [2022-11-16 20:06:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:18,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:18,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:18,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97041677] [2022-11-16 20:06:18,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97041677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:18,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:18,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:06:18,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753107419] [2022-11-16 20:06:18,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:18,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:06:18,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:06:18,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:18,772 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) [2022-11-16 20:06:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:19,038 INFO L93 Difference]: Finished difference Result 5815 states and 9675 transitions. [2022-11-16 20:06:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:06:19,039 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 [2022-11-16 20:06:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:19,059 INFO L225 Difference]: With dead ends: 5815 [2022-11-16 20:06:19,059 INFO L226 Difference]: Without dead ends: 3886 [2022-11-16 20:06:19,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:19,066 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 47 mSDsluCounter, 158 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 [2022-11-16 20:06:19,067 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] [2022-11-16 20:06:19,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3886 states. [2022-11-16 20:06:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3886 to 3881. [2022-11-16 20:06:19,332 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) [2022-11-16 20:06:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3881 states to 3881 states and 6385 transitions. [2022-11-16 20:06:19,387 INFO L78 Accepts]: Start accepts. Automaton has 3881 states and 6385 transitions. Word has length 72 [2022-11-16 20:06:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:19,387 INFO L495 AbstractCegarLoop]: Abstraction has 3881 states and 6385 transitions. [2022-11-16 20:06:19,387 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) [2022-11-16 20:06:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3881 states and 6385 transitions. [2022-11-16 20:06:19,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 20:06:19,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:19,394 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] [2022-11-16 20:06:19,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 20:06:19,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -148241109, now seen corresponding path program 1 times [2022-11-16 20:06:19,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:19,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528041357] [2022-11-16 20:06:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:19,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528041357] [2022-11-16 20:06:19,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528041357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:19,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:19,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:06:19,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111002420] [2022-11-16 20:06:19,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:19,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:06:19,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:06:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:19,502 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) [2022-11-16 20:06:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:19,919 INFO L93 Difference]: Finished difference Result 9676 states and 16072 transitions. [2022-11-16 20:06:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:06:19,919 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 [2022-11-16 20:06:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:19,952 INFO L225 Difference]: With dead ends: 9676 [2022-11-16 20:06:19,952 INFO L226 Difference]: Without dead ends: 6483 [2022-11-16 20:06:19,961 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 [2022-11-16 20:06:19,962 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 45 mSDsluCounter, 155 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 [2022-11-16 20:06:19,963 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] [2022-11-16 20:06:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6483 states. [2022-11-16 20:06:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6483 to 6478. [2022-11-16 20:06:20,461 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) [2022-11-16 20:06:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6478 states to 6478 states and 10638 transitions. [2022-11-16 20:06:20,486 INFO L78 Accepts]: Start accepts. Automaton has 6478 states and 10638 transitions. Word has length 73 [2022-11-16 20:06:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:20,486 INFO L495 AbstractCegarLoop]: Abstraction has 6478 states and 10638 transitions. [2022-11-16 20:06:20,487 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) [2022-11-16 20:06:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 6478 states and 10638 transitions. [2022-11-16 20:06:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 20:06:20,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:20,495 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] [2022-11-16 20:06:20,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 20:06:20,495 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1120522163, now seen corresponding path program 1 times [2022-11-16 20:06:20,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:20,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753192363] [2022-11-16 20:06:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:20,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:20,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753192363] [2022-11-16 20:06:20,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753192363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:20,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:20,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:06:20,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808999280] [2022-11-16 20:06:20,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:20,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:06:20,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:20,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:06:20,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:20,575 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) [2022-11-16 20:06:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:21,312 INFO L93 Difference]: Finished difference Result 16928 states and 27990 transitions. [2022-11-16 20:06:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:06:21,313 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 [2022-11-16 20:06:21,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:21,387 INFO L225 Difference]: With dead ends: 16928 [2022-11-16 20:06:21,388 INFO L226 Difference]: Without dead ends: 11427 [2022-11-16 20:06:21,408 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 [2022-11-16 20:06:21,409 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 43 mSDsluCounter, 159 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 [2022-11-16 20:06:21,409 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] [2022-11-16 20:06:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11427 states. [2022-11-16 20:06:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11427 to 11422. [2022-11-16 20:06:22,266 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) [2022-11-16 20:06:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11422 states to 11422 states and 18665 transitions. [2022-11-16 20:06:22,314 INFO L78 Accepts]: Start accepts. Automaton has 11422 states and 18665 transitions. Word has length 74 [2022-11-16 20:06:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:22,315 INFO L495 AbstractCegarLoop]: Abstraction has 11422 states and 18665 transitions. [2022-11-16 20:06:22,316 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) [2022-11-16 20:06:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 11422 states and 18665 transitions. [2022-11-16 20:06:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 20:06:22,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:22,325 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] [2022-11-16 20:06:22,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 20:06:22,325 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:22,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:22,326 INFO L85 PathProgramCache]: Analyzing trace with hash -472504342, now seen corresponding path program 1 times [2022-11-16 20:06:22,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:22,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429118394] [2022-11-16 20:06:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:22,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:22,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:22,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429118394] [2022-11-16 20:06:22,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429118394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:22,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:22,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:06:22,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967714244] [2022-11-16 20:06:22,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:22,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:06:22,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:22,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:06:22,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:22,407 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) [2022-11-16 20:06:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:23,984 INFO L93 Difference]: Finished difference Result 30247 states and 49756 transitions. [2022-11-16 20:06:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:06:23,984 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 [2022-11-16 20:06:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:24,065 INFO L225 Difference]: With dead ends: 30247 [2022-11-16 20:06:24,065 INFO L226 Difference]: Without dead ends: 20254 [2022-11-16 20:06:24,096 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 [2022-11-16 20:06:24,096 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 41 mSDsluCounter, 155 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 [2022-11-16 20:06:24,097 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] [2022-11-16 20:06:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20254 states. [2022-11-16 20:06:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20254 to 20249. [2022-11-16 20:06:25,601 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) [2022-11-16 20:06:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20249 states to 20249 states and 32942 transitions. [2022-11-16 20:06:25,682 INFO L78 Accepts]: Start accepts. Automaton has 20249 states and 32942 transitions. Word has length 75 [2022-11-16 20:06:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:25,683 INFO L495 AbstractCegarLoop]: Abstraction has 20249 states and 32942 transitions. [2022-11-16 20:06:25,683 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) [2022-11-16 20:06:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 20249 states and 32942 transitions. [2022-11-16 20:06:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 20:06:25,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:25,697 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] [2022-11-16 20:06:25,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 20:06:25,697 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:25,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:25,699 INFO L85 PathProgramCache]: Analyzing trace with hash -844489487, now seen corresponding path program 1 times [2022-11-16 20:06:25,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:25,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254552992] [2022-11-16 20:06:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:25,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:25,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:25,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254552992] [2022-11-16 20:06:25,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254552992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:25,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:25,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:06:25,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190582926] [2022-11-16 20:06:25,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:25,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:06:25,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:06:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:25,787 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) [2022-11-16 20:06:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:28,040 INFO L93 Difference]: Finished difference Result 54959 states and 89848 transitions. [2022-11-16 20:06:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:06:28,041 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 [2022-11-16 20:06:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:28,196 INFO L225 Difference]: With dead ends: 54959 [2022-11-16 20:06:28,196 INFO L226 Difference]: Without dead ends: 36694 [2022-11-16 20:06:28,246 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 [2022-11-16 20:06:28,247 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 39 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-16 20:06:28,247 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] [2022-11-16 20:06:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2022-11-16 20:06:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 36689. [2022-11-16 20:06:31,112 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) [2022-11-16 20:06:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36689 states to 36689 states and 59316 transitions. [2022-11-16 20:06:31,272 INFO L78 Accepts]: Start accepts. Automaton has 36689 states and 59316 transitions. Word has length 76 [2022-11-16 20:06:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:31,273 INFO L495 AbstractCegarLoop]: Abstraction has 36689 states and 59316 transitions. [2022-11-16 20:06:31,273 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) [2022-11-16 20:06:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 36689 states and 59316 transitions. [2022-11-16 20:06:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 20:06:31,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:31,289 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] [2022-11-16 20:06:31,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 20:06:31,289 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:31,290 INFO L85 PathProgramCache]: Analyzing trace with hash 9354858, now seen corresponding path program 1 times [2022-11-16 20:06:31,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:31,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108373727] [2022-11-16 20:06:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:31,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:31,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:31,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108373727] [2022-11-16 20:06:31,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108373727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:31,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:31,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:06:31,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335051599] [2022-11-16 20:06:31,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:31,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:06:31,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:31,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:06:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:06:31,396 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) [2022-11-16 20:06:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:35,191 INFO L93 Difference]: Finished difference Result 67576 states and 109429 transitions. [2022-11-16 20:06:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:06:35,195 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 [2022-11-16 20:06:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:35,467 INFO L225 Difference]: With dead ends: 67576 [2022-11-16 20:06:35,468 INFO L226 Difference]: Without dead ends: 67522 [2022-11-16 20:06:35,492 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 [2022-11-16 20:06:35,493 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 37 mSDsluCounter, 155 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 [2022-11-16 20:06:35,494 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] [2022-11-16 20:06:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67522 states. [2022-11-16 20:06:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67522 to 67517. [2022-11-16 20:06:40,336 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) [2022-11-16 20:06:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67517 states to 67517 states and 108270 transitions. [2022-11-16 20:06:40,560 INFO L78 Accepts]: Start accepts. Automaton has 67517 states and 108270 transitions. Word has length 77 [2022-11-16 20:06:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:40,560 INFO L495 AbstractCegarLoop]: Abstraction has 67517 states and 108270 transitions. [2022-11-16 20:06:40,561 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) [2022-11-16 20:06:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 67517 states and 108270 transitions. [2022-11-16 20:06:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 20:06:40,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:40,574 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] [2022-11-16 20:06:40,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 20:06:40,574 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:40,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:40,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1727534414, now seen corresponding path program 1 times [2022-11-16 20:06:40,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:40,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86881054] [2022-11-16 20:06:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:40,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:06:42,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:42,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86881054] [2022-11-16 20:06:42,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86881054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:42,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:42,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-16 20:06:42,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299013814] [2022-11-16 20:06:42,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:42,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 20:06:42,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:42,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 20:06:42,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:06:42,277 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) [2022-11-16 20:06:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:47,414 INFO L93 Difference]: Finished difference Result 67582 states and 108360 transitions. [2022-11-16 20:06:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 20:06:47,415 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 [2022-11-16 20:06:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:47,700 INFO L225 Difference]: With dead ends: 67582 [2022-11-16 20:06:47,701 INFO L226 Difference]: Without dead ends: 67548 [2022-11-16 20:06:47,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-11-16 20:06:47,726 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 239 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:06:47,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 2019 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 20:06:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67548 states. [2022-11-16 20:06:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67548 to 67532. [2022-11-16 20:06:53,651 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) [2022-11-16 20:06:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67532 states to 67532 states and 108286 transitions. [2022-11-16 20:06:53,866 INFO L78 Accepts]: Start accepts. Automaton has 67532 states and 108286 transitions. Word has length 78 [2022-11-16 20:06:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:53,867 INFO L495 AbstractCegarLoop]: Abstraction has 67532 states and 108286 transitions. [2022-11-16 20:06:53,867 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) [2022-11-16 20:06:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 67532 states and 108286 transitions. [2022-11-16 20:06:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-16 20:06:53,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:53,929 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] [2022-11-16 20:06:53,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 20:06:53,929 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:53,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash 262295376, now seen corresponding path program 1 times [2022-11-16 20:06:53,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:53,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951239852] [2022-11-16 20:06:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:53,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 20:06:54,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:54,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951239852] [2022-11-16 20:06:54,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951239852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:54,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:54,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:06:54,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152897262] [2022-11-16 20:06:54,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:54,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:06:54,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:54,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:06:54,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:06:54,210 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)