./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW --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 e4fb36b23f327758af91661b12ca1735faf7949901dbd5c1543c17ea0384ceb9 --- 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-4e7fbc6 [2022-11-23 15:59:46,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:59:46,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:59:46,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:59:46,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:59:46,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:59:46,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:59:46,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:59:46,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:59:46,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:59:46,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:59:46,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:59:46,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:59:46,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:59:46,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:59:46,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:59:46,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:59:46,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:59:46,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:59:46,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:59:46,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:59:46,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:59:46,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:59:46,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:59:46,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:59:46,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:59:46,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:59:46,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:59:46,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:59:46,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:59:46,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:59:46,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:59:46,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:59:46,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:59:46,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:59:46,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:59:46,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:59:46,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:59:46,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:59:46,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:59:46,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:59:46,298 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:59:46,351 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:59:46,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:59:46,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:59:46,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:59:46,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:59:46,354 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:59:46,354 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:59:46,354 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:59:46,355 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:59:46,355 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:59:46,356 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:59:46,357 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:59:46,357 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:59:46,357 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:59:46,358 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:59:46,358 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:59:46,358 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:59:46,359 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:59:46,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:59:46,360 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:59:46,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:59:46,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:59:46,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:59:46,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:59:46,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:59:46,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:59:46,363 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:59:46,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:59:46,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:59:46,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:59:46,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:59:46,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:59:46,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:59:46,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:59:46,366 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:59:46,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:59:46,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:59:46,366 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:59:46,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:59:46,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:59:46,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:59:46,368 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_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4fb36b23f327758af91661b12ca1735faf7949901dbd5c1543c17ea0384ceb9 [2022-11-23 15:59:46,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:59:46,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:59:46,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:59:46,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:59:46,769 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:59:46,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/email_spec11_product30.cil.c [2022-11-23 15:59:50,436 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:59:50,857 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:59:50,858 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c [2022-11-23 15:59:50,888 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/data/eeeeef0aa/6bd2a1f1664844cb9c82b53b420dfc8e/FLAGda8d33abc [2022-11-23 15:59:50,912 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/data/eeeeef0aa/6bd2a1f1664844cb9c82b53b420dfc8e [2022-11-23 15:59:50,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:59:50,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:59:50,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:59:50,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:59:50,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:59:50,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:59:50" (1/1) ... [2022-11-23 15:59:50,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af902cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:50, skipping insertion in model container [2022-11-23 15:59:50,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:59:50" (1/1) ... [2022-11-23 15:59:50,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:59:51,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:59:51,633 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c[29507,29520] [2022-11-23 15:59:51,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:59:51,798 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:59:51,921 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c[29507,29520] [2022-11-23 15:59:52,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:59:52,114 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:59:52,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52 WrapperNode [2022-11-23 15:59:52,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:59:52,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:59:52,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:59:52,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:59:52,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,231 INFO L138 Inliner]: procedures = 131, calls = 217, calls flagged for inlining = 60, calls inlined = 50, statements flattened = 903 [2022-11-23 15:59:52,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:59:52,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:59:52,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:59:52,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:59:52,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,288 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:59:52,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:59:52,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:59:52,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:59:52,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (1/1) ... [2022-11-23 15:59:52,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:59:52,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:52,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:59:52,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:59:52,440 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-23 15:59:52,440 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-23 15:59:52,440 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-23 15:59:52,440 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-23 15:59:52,441 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-23 15:59:52,441 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-23 15:59:52,441 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-23 15:59:52,441 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-23 15:59:52,441 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-23 15:59:52,442 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-23 15:59:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-23 15:59:52,442 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-23 15:59:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-23 15:59:52,442 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-23 15:59:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-23 15:59:52,443 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-23 15:59:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-23 15:59:52,443 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-23 15:59:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-23 15:59:52,444 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-23 15:59:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-23 15:59:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-23 15:59:52,445 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-23 15:59:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-23 15:59:52,446 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-23 15:59:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:59:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-23 15:59:52,447 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-23 15:59:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-23 15:59:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-23 15:59:52,450 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-23 15:59:52,450 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-23 15:59:52,450 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-23 15:59:52,451 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-23 15:59:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-23 15:59:52,451 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-23 15:59:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-23 15:59:52,452 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-23 15:59:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-23 15:59:52,452 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-23 15:59:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-23 15:59:52,453 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-23 15:59:52,453 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-23 15:59:52,453 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-23 15:59:52,453 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-23 15:59:52,454 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-23 15:59:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:59:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-23 15:59:52,455 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-23 15:59:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:59:52,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:59:52,810 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:59:52,835 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:59:53,991 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:59:54,629 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:59:54,629 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:59:54,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:59:54 BoogieIcfgContainer [2022-11-23 15:59:54,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:59:54,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:59:54,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:59:54,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:59:54,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:59:50" (1/3) ... [2022-11-23 15:59:54,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212c66dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:59:54, skipping insertion in model container [2022-11-23 15:59:54,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:52" (2/3) ... [2022-11-23 15:59:54,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212c66dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:59:54, skipping insertion in model container [2022-11-23 15:59:54,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:59:54" (3/3) ... [2022-11-23 15:59:54,652 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec11_product30.cil.c [2022-11-23 15:59:54,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:59:54,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:59:54,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:59:54,787 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;@7c386b8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:59:54,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:59:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 109 states have (on average 1.3302752293577982) internal successors, (145), 113 states have internal predecessors, (145), 52 states have call successors, (52), 23 states have call predecessors, (52), 23 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-11-23 15:59:54,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 15:59:54,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:54,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:54,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:54,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1991215324, now seen corresponding path program 1 times [2022-11-23 15:59:54,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:54,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167099173] [2022-11-23 15:59:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:54,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:59:55,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:55,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167099173] [2022-11-23 15:59:55,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167099173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:55,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:59:55,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:59:55,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972953386] [2022-11-23 15:59:55,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:55,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:59:55,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:59:55,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:59:55,431 INFO L87 Difference]: Start difference. First operand has 186 states, 109 states have (on average 1.3302752293577982) internal successors, (145), 113 states have internal predecessors, (145), 52 states have call successors, (52), 23 states have call predecessors, (52), 23 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:59:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:55,614 INFO L93 Difference]: Finished difference Result 289 states and 376 transitions. [2022-11-23 15:59:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:59:55,618 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 88 [2022-11-23 15:59:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:55,633 INFO L225 Difference]: With dead ends: 289 [2022-11-23 15:59:55,634 INFO L226 Difference]: Without dead ends: 183 [2022-11-23 15:59:55,639 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 [2022-11-23 15:59:55,644 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:55,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:59:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-23 15:59:55,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-11-23 15:59:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 107 states have (on average 1.2990654205607477) internal successors, (139), 110 states have internal predecessors, (139), 52 states have call successors, (52), 23 states have call predecessors, (52), 23 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-11-23 15:59:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 242 transitions. [2022-11-23 15:59:55,727 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 242 transitions. Word has length 88 [2022-11-23 15:59:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:55,729 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 242 transitions. [2022-11-23 15:59:55,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:59:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 242 transitions. [2022-11-23 15:59:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 15:59:55,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:55,736 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:55,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:59:55,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:55,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1126541311, now seen corresponding path program 1 times [2022-11-23 15:59:55,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:55,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624679488] [2022-11-23 15:59:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:55,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:59:56,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624679488] [2022-11-23 15:59:56,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624679488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:56,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:59:56,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:59:56,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688691552] [2022-11-23 15:59:56,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:56,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:59:56,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:56,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:59:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:56,226 INFO L87 Difference]: Start difference. First operand 183 states and 242 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:59:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:56,444 INFO L93 Difference]: Finished difference Result 285 states and 364 transitions. [2022-11-23 15:59:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:59:56,445 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 89 [2022-11-23 15:59:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:56,448 INFO L225 Difference]: With dead ends: 285 [2022-11-23 15:59:56,448 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 15:59:56,450 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 [2022-11-23 15:59:56,451 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 0 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:56,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 417 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:59:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 15:59:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 15:59:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 109 states have (on average 1.2935779816513762) internal successors, (141), 112 states have internal predecessors, (141), 52 states have call successors, (52), 23 states have call predecessors, (52), 23 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-11-23 15:59:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 244 transitions. [2022-11-23 15:59:56,476 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 244 transitions. Word has length 89 [2022-11-23 15:59:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:56,477 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 244 transitions. [2022-11-23 15:59:56,477 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:59:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 244 transitions. [2022-11-23 15:59:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 15:59:56,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:56,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-23 15:59:56,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:59:56,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:56,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash 468194357, now seen corresponding path program 1 times [2022-11-23 15:59:56,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:56,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903964797] [2022-11-23 15:59:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:56,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:59:56,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:56,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903964797] [2022-11-23 15:59:56,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903964797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:56,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:59:56,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:59:56,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179493365] [2022-11-23 15:59:56,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:56,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:59:56,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:56,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:59:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:56,660 INFO L87 Difference]: Start difference. First operand 185 states and 244 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:59:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:56,828 INFO L93 Difference]: Finished difference Result 400 states and 547 transitions. [2022-11-23 15:59:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:59:56,829 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2022-11-23 15:59:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:56,837 INFO L225 Difference]: With dead ends: 400 [2022-11-23 15:59:56,837 INFO L226 Difference]: Without dead ends: 233 [2022-11-23 15:59:56,845 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 [2022-11-23 15:59:56,847 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 57 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:56,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 429 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:59:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-23 15:59:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 228. [2022-11-23 15:59:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 141 states have (on average 1.375886524822695) internal successors, (194), 144 states have internal predecessors, (194), 63 states have call successors, (63), 23 states have call predecessors, (63), 23 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-23 15:59:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 319 transitions. [2022-11-23 15:59:56,902 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 319 transitions. Word has length 94 [2022-11-23 15:59:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:56,903 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 319 transitions. [2022-11-23 15:59:56,903 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:59:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 319 transitions. [2022-11-23 15:59:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-23 15:59:56,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:56,906 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-23 15:59:56,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:59:56,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:56,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1757014210, now seen corresponding path program 1 times [2022-11-23 15:59:56,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:56,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269505350] [2022-11-23 15:59:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:56,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:59:57,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:57,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269505350] [2022-11-23 15:59:57,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269505350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:59:57,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995917643] [2022-11-23 15:59:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:57,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:57,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:57,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:57,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:59:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:57,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:59:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:59:57,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:59:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:59:57,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995917643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:59:57,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398264963] [2022-11-23 15:59:57,956 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-23 15:59:57,957 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:59:57,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:59:57,969 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:59:57,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:00:47,779 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-23 16:00:48,214 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-23 16:00:48,627 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 477 for LOIs [2022-11-23 16:01:37,304 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 447 for LOIs [2022-11-23 16:01:37,654 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 475 for LOIs [2022-11-23 16:02:16,131 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 251 for LOIs [2022-11-23 16:02:17,031 INFO L197 IcfgInterpreter]: Interpreting procedure isEncrypted with input of size 251 for LOIs [2022-11-23 16:02:17,083 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 436 for LOIs [2022-11-23 16:02:17,396 INFO L197 IcfgInterpreter]: Interpreting procedure findPublicKey with input of size 249 for LOIs [2022-11-23 16:02:17,551 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 247 for LOIs [2022-11-23 16:02:17,639 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 449 for LOIs [2022-11-23 16:02:18,468 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:02:39,031 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 444 DAG size of output: 244 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:02:45,936 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 467 DAG size of output: 264 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:10,645 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 486 DAG size of output: 290 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:16,582 WARN L233 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 498 DAG size of output: 327 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:43,938 WARN L233 SmtUtils]: Spent 20.67s on a formula simplification. DAG size of input: 587 DAG size of output: 462 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:04:04,770 WARN L233 SmtUtils]: Spent 20.44s on a formula simplification. DAG size of input: 589 DAG size of output: 464 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:04:25,436 WARN L233 SmtUtils]: Spent 20.25s on a formula simplification. DAG size of input: 588 DAG size of output: 465 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:04:31,766 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 563 DAG size of output: 337 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:04:41,080 WARN L233 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 580 DAG size of output: 390 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:04:51,902 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 491 DAG size of output: 319 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:05:06,101 WARN L233 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 539 DAG size of output: 344 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:05:21,591 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 535 DAG size of output: 296 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:05:27,626 WARN L233 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 548 DAG size of output: 310 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:06:29,591 WARN L233 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 586 DAG size of output: 480 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:14,099 WARN L233 SmtUtils]: Spent 15.41s on a formula simplification. DAG size of input: 645 DAG size of output: 419 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:26,719 WARN L233 SmtUtils]: Spent 11.61s on a formula simplification. DAG size of input: 642 DAG size of output: 506 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:37,963 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 486 DAG size of output: 449 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:44,475 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 508 DAG size of output: 469 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:52,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3291#(and (<= 1 |outgoing_getClientAutoResponse_~retValue_acc~35#1|) (= ~__ste_Client_Keyring1_User2~0 0) (= ~__GUIDSL_NON_TERMINAL_main~0 0) (<= 0 |outgoing_incoming_~tmp~4#1|) (= |old(~__ste_email_encryptionKey0~0)| 0) (= 0 |old(~__ste_email_isSignatureVerified1~0)|) (<= 1 |outgoing_outgoing__wrappee__Keys_~msg#1|) (<= |outgoing_outgoing__wrappee__AutoResponder_~receiver~0#1| 2) (<= 2 |outgoing_incoming__wrappee__Encrypt_~client#1|) (= ~__ste_email_subject0~0.offset 0) (<= 0 ~__ste_email_encryptionKey1~0) (= ~__SELECTED_FEATURE_Sign~0 0) (= 0 ~__ste_Client_AddressBook0_Address2~0) (= ~__ste_client_outbuffer3~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp~2#1| 2) (<= |outgoing_mail_~tmp~0#1| 2) (<= |outgoing_incoming_~tmp~4#1| 0) (<= 1 |outgoing_mail_#in~client#1|) (<= |outgoing_mail_#in~msg#1| 1) (<= 0 (+ 2147483648 |outgoing_getClientId_#res#1|)) (= ~__ste_Client_counter~0 0) (= ~__ste_Client_Keyring1_PublicKey2~0 0) (<= 1 |outgoing_incoming__wrappee__Sign_~tmp~3#1|) (<= |outgoing_autoRespond_~__utac__ad__arg2~0#1| 1) (<= ~__ste_email_encryptionKey1~0 0) (<= 1 |outgoing_deliver_#in~msg#1|) (<= ~__ste_email_isSignatureVerified1~0 0) (<= |old(~__ste_email_to0~0)| 2) (= ~__ste_Client_AddressBook2_Alias0~0 0) (= 0 ~__ste_email_subject0~0.base) (<= |outgoing_outgoing__wrappee__Keys_~tmp~1#1| 2147483647) (<= 1 |outgoing_sign_~client#1|) (<= 1 |outgoing_mail_~msg#1|) (= ~__ste_Client_AddressBook2_Alias1~0 0) (= ~__ste_Client_Keyring2_PublicKey2~0 0) (= ~__ste_client_forwardReceiver3~0 0) (<= |outgoing_sign_~privkey~1#1| 2147483647) (= ~__ste_client_name2~0.offset 0) (<= |outgoing___utac_acc__DecryptAutoResponder_spec__1_#in~msg#1| 1) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_~client#1|) (= ~__ste_client_name1~0.base 0) (= ~__SELECTED_FEATURE_Verify~0 0) (= ~__ste_Client_Keyring1_User0~0 0) (<= 2 |outgoing___utac_acc__DecryptAutoResponder_spec__1_~client#1|) (<= |outgoing_autoRespond_#in~msg#1| 1) (= 0 |old(~__ste_email_isSignatureVerified0~0)|) (<= 1 |outgoing_incoming__wrappee__Verify_~msg#1|) (<= |outgoing_sign_~msg#1| 1) (<= |outgoing_verify_#in~msg#1| 1) (<= 2 |old(~__ste_email_to0~0)|) (<= ~__ste_client_idCounter2~0 3) (<= ~queued_message~0 0) (<= ~__ste_email_isSignatureVerified0~0 0) (<= 2 |outgoing_incoming__wrappee__Sign_#in~client#1|) (= ~__ste_email_body1~0.offset 0) (= ~__SELECTED_FEATURE_Encrypt~0 0) (= ~__ste_Client_AddressBook1_Address2~0 0) (<= ~__ste_email_from0~0 2147483647) (<= 1 |outgoing_incoming__wrappee__Sign_~msg#1|) (= ~__ste_ClientAddressBook_size1~0 0) (= ~__ste_Client_Keyring0_PublicKey0~0 0) (<= |outgoing___utac_acc__DecryptAutoResponder_spec__1_#in~client#1| 2) (= ~__ste_Email_counter~0 0) (<= |outgoing_incoming_#in~msg#1| 1) (<= |outgoing_sign_~client#1| 1) (<= 2 |outgoing_deliver_~client#1|) (= ~__ste_ClientKeyring_size1~0 0) (<= |outgoing_verify_#in~client#1| 2) (= |old(~__ste_email_signKey0~0)| 0) (= ~__ste_email_body0~0.offset 0) (<= |outgoing_getClientId_~retValue_acc~43#1| 2147483647) (<= 1 |outgoing_~client#1|) (<= |outgoing_incoming__wrappee__Sign_#in~client#1| 2) (<= 0 ~__ste_email_isSigned1~0) (<= 0 (+ ~__ste_email_from0~0 2147483648)) (<= 1 |outgoing_verify_~msg#1|) (= ~__ste_Client_Keyring0_User2~0 0) (<= |outgoing_getClientAutoResponse_#res#1| 1) (<= |outgoing_getClientAutoResponse_~handle#1| 2) (<= 2 |outgoing_incoming_~client#1|) (= ~__ste_ClientAddressBook_size0~0 0) (= ~__ste_Client_Keyring0_User1~0 0) (= ~__ste_Client_AddressBook1_Alias1~0 0) (<= 1 |outgoing_deliver_~msg#1|) (= ~__ste_client_name1~0.offset 0) (<= |outgoing_getClientId_#res#1| 2147483647) (<= |outgoing_incoming__wrappee__Encrypt_~msg#1| 1) (= ~head~0.offset 0) (<= |outgoing_incoming__wrappee__Verify_~client#1| 2) (= ~__ste_client_name0~0.offset 0) (= |outgoing_#in~msg#1| 1) (<= |outgoing_deliver_#in~msg#1| 1) (<= 1 |outgoing_outgoing__wrappee__Keys_~client#1|) (<= |outgoing_autoRespond_#in~client#1| 2) (<= 2 |outgoing_getClientAutoResponse_#in~handle#1|) (<= ~__ste_client_autoResponse1~0 1) (<= |outgoing_incoming__wrappee__Verify_#in~msg#1| 1) (= ~__ste_Client_Keyring0_PublicKey2~0 0) (= |old(~queue_empty~0)| 1) (= 0 |outgoing___utac_acc__DecryptAutoResponder_spec__1_~tmp~11#1|) (<= 1 |outgoing_verify_#in~msg#1|) (<= ~__ste_client_privateKey2~0 789) (= ~__ste_Client_Keyring1_PublicKey0~0 0) (= |old(~__ste_email_from0~0)| 0) (<= |outgoing_sign_#in~client#1| 1) (<= |outgoing_deliver_#in~client#1| 2) (<= |outgoing_deliver_~msg#1| 1) (<= ~queue_empty~0 1) (<= 1 |outgoing_incoming_#in~msg#1|) (= ~__SELECTED_FEATURE_Decrypt~0 0) (<= 1 |outgoing_getClientId_~handle#1|) (<= 1 |outgoing_autoRespond_~msg#1|) (<= 0 (+ ~__ste_email_signKey0~0 2147483648)) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1|) (<= |outgoing_incoming__wrappee__Encrypt_#in~client#1| 2) (<= 0 |outgoing_outgoing__wrappee__AutoResponder_~tmp___0~0#1|) (<= 0 ~__ste_email_isEncrypted1~0) (= ~__SELECTED_FEATURE_Keys~0 0) (<= ~__ste_email_signKey0~0 2147483647) (= |old(~__ste_email_isSigned0~0)| 0) (= ~__SELECTED_FEATURE_AddressBook~0 0) (= ~__ste_client_forwardReceiver2~0 0) (= ~__ste_Client_Keyring0_PublicKey1~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp___0~0#1| 0) (= ~__SELECTED_FEATURE_Forward~0 0) (<= 0 ~__ste_email_isEncrypted0~0) (= ~__ste_Client_Keyring0_User0~0 0) (<= 1 |outgoing_mail_#in~msg#1|) (<= ~__ste_client_idCounter0~0 2147483647) (= ~__ste_Client_Keyring2_PublicKey1~0 0) (<= 2 |outgoing_incoming__wrappee__Sign_~client#1|) (<= |outgoing_getClientAutoResponse_#in~handle#1| 2) (= ~__ste_email_body0~0.base 0) (<= ~__ste_email_isSigned0~0 1) (<= ~__ste_email_isEncrypted0~0 0) (<= 0 (+ |outgoing_sign_~tmp~8#1| 2147483648)) (= ~__ste_Client_AddressBook0_Alias0~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~msg#1|) (<= |outgoing_incoming__wrappee__Encrypt_~client#1| 2) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_~tmp~1#1| 2147483648)) (<= 2 |outgoing_getClientAutoResponse_~handle#1|) (= ~__ste_email_id0~0 0) (<= ~__ste_client_autoResponse0~0 0) (<= 1 |outgoing_autoRespond_~__utac__ad__arg2~0#1|) (= ~__ste_Client_Keyring2_User1~0 0) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_#in~client#1|) (<= 3 ~__ste_client_idCounter2~0) (<= |outgoing___utac_acc__DecryptAutoResponder_spec__1_~msg#1| 1) (<= |outgoing_deliver_~client#1| 2) (= ~__ste_Client_AddressBook2_Address2~0 0) (<= |outgoing_autoRespond_~msg#1| 1) (= 3 ~chuck~0) (<= |outgoing_verify_~msg#1| 1) (= ~__ste_Client_AddressBook2_Address1~0 0) (<= 0 ~__ste_email_signKey1~0) (<= 1 ~queue_empty~0) (<= ~__ste_email_signKey1~0 0) (<= 1 |outgoing_autoRespond_#in~msg#1|) (<= ~__ste_email_isSigned1~0 0) (= ~bob~0 1) (= ~__ste_client_forwardReceiver1~0 0) (<= 0 ~__ste_client_autoResponse0~0) (= |outgoing_incoming_~privkey~0#1| 0) (<= 0 ~queued_message~0) (= ~__ste_Client_AddressBook1_Alias2~0 0) (<= 0 ~__ste_email_isSignatureVerified1~0) (= |old(~__ste_email_isEncrypted0~0)| 0) (= ~__ste_client_outbuffer0~0 0) (<= |outgoing_outgoing__wrappee__Keys_~client#1| 1) (<= 789 ~__ste_client_privateKey2~0) (<= 1 |outgoing_sign_#in~client#1|) (<= |outgoing_getClientId_#in~handle#1| 1) (<= 1 |outgoing_sign_~msg#1|) (<= |outgoing_incoming_~client#1| 2) (<= 1 |outgoing_~msg#1|) (= ~__SELECTED_FEATURE_Base~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~client#1| 1) (= |old(~__ste_email_signKey1~0)| 0) (<= 2 |outgoing_mail_~tmp~0#1|) (= ~__ste_client_forwardReceiver0~0 0) (<= 1 |outgoing_getClientAutoResponse_#res#1|) (<= |outgoing_mail_~client#1| 1) (= ~__ste_Client_Keyring2_User0~0 0) (= |outgoing_outgoing__wrappee__AutoResponder_~pubkey~0#1| 0) (= ~rjh~0 2) (= 0 ~__ste_Client_AddressBook0_Address1~0) (<= |outgoing_incoming__wrappee__Sign_~msg#1| 1) (= ~__ste_Client_AddressBook2_Address0~0 0) (= ~__ste_Client_Keyring1_PublicKey1~0 0) (<= 0 ~queued_client~0) (= |old(~queued_message~0)| 0) (<= 1 |outgoing_incoming__wrappee__Verify_#in~msg#1|) (= ~__ste_Client_Keyring2_PublicKey0~0 0) (<= 0 ~__ste_email_isSignatureVerified0~0) (= ~__ste_Client_AddressBook1_Address0~0 0) (<= |outgoing_incoming__wrappee__Sign_~tmp~3#1| 1) (<= |outgoing_sign_~tmp~8#1| 2147483647) (= ~__ste_client_name2~0.base 0) (<= 2 |outgoing_autoRespond_~__utac__ad__arg1~0#1|) (<= |outgoing_mail_~msg#1| 1) (<= |outgoing_incoming__wrappee__Sign_~client#1| 2) (= |old(~queued_client~0)| 0) (<= |outgoing_incoming__wrappee__Verify_#in~client#1| 2) (<= ~__ste_email_encryptionKey0~0 0) (= |outgoing_verify_~tmp~9#1| 0) (= ~__ste_email_subject1~0.base 0) (= ~__ste_Client_AddressBook1_Alias0~0 0) (<= |outgoing_mail_#in~client#1| 1) (<= |outgoing_outgoing__wrappee__Keys_#in~client#1| 1) (<= 1 ~__ste_client_autoResponse1~0) (= ~__ste_Client_Keyring2_User2~0 0) (= ~head~0.base 0) (<= 2 |outgoing_outgoing__wrappee__AutoResponder_~receiver~0#1|) (<= 2 |outgoing_autoRespond_#in~client#1|) (= ~__ste_Client_Keyring1_User1~0 0) (<= 2 |outgoing___utac_acc__DecryptAutoResponder_spec__1_#in~client#1|) (<= |outgoing_autoRespond_~__utac__ad__arg1~0#1| 2) (= |#NULL.offset| 0) (<= 1 |outgoing_incoming__wrappee__Encrypt_#in~msg#1|) (<= |outgoing_incoming_~msg#1| 1) (<= |outgoing_sign_#in~msg#1| 1) (= ~__ste_Client_AddressBook2_Alias2~0 0) (<= |outgoing_#in~client#1| 1) (<= 1 |outgoing_incoming_~msg#1|) (<= 0 (+ |outgoing_sign_~privkey~1#1| 2147483648)) (<= 2 |outgoing_verify_~client#1|) (<= 0 ~__ste_email_isSigned0~0) (<= 0 ~__ste_client_autoResponse2~0) (<= |outgoing_incoming__wrappee__Sign_#in~msg#1| 1) (= ~__ste_email_subject1~0.offset 0) (<= |outgoing_autoRespond_~client#1| 2) (= ~__ste_Client_AddressBook0_Alias2~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1| 1) (= ~__ste_ClientKeyring_size0~0 0) (<= 2 |outgoing_incoming__wrappee__Encrypt_#in~client#1|) (<= |outgoing_~msg#1| 1) (<= |outgoing_outgoing__wrappee__AutoResponder_~client#1| 1) (<= 2 |outgoing_autoRespond_~client#1|) (= ~__ste_Client_AddressBook1_Address1~0 0) (<= |outgoing_outgoing__wrappee__Keys_~msg#1| 1) (= 0 ~__ste_Client_AddressBook0_Address0~0) (<= |outgoing_incoming__wrappee__Encrypt_#in~msg#1| 1) (= ~__ste_client_outbuffer1~0 0) (<= |outgoing_incoming__wrappee__Verify_~msg#1| 1) (<= |outgoing_outgoing__wrappee__AutoResponder_~msg#1| 1) (= |old(~__ste_email_isSigned1~0)| 0) (= ~__ste_Client_AddressBook0_Alias1~0 0) (<= ~__ste_email_isEncrypted1~0 0) (= |old(~__ste_email_isEncrypted1~0)| 0) (<= 1 |outgoing_getClientId_#in~handle#1|) (= ~__GUIDSL_ROOT_PRODUCTION~0 0) (<= 1 |outgoing_incoming__wrappee__Sign_#in~msg#1|) (<= |outgoing_getClientId_~handle#1| 1) (<= 1 |outgoing_sign_#in~msg#1|) (<= 1 |outgoing_#in~client#1|) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_~msg#1|) (<= 2 |outgoing_outgoing__wrappee__AutoResponder_~tmp~2#1|) (<= |outgoing_~client#1| 1) (<= |outgoing___utac_acc__DecryptAutoResponder_spec__1_~client#1| 2) (<= 1 |outgoing_incoming__wrappee__Encrypt_~msg#1|) (<= 0 (+ |outgoing_getClientId_~retValue_acc~43#1| 2147483648)) (= |old(~__ste_email_encryptionKey1~0)| 0) (<= 2 |outgoing_verify_#in~client#1|) (<= 2 |outgoing_incoming_#in~client#1|) (= ~__ste_client_name0~0.base 0) (= ~__ste_email_id1~0 0) (= ~__ste_client_outbuffer2~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~client#1|) (<= 0 (+ ~__ste_client_idCounter0~0 2147483648)) (<= 2 ~__ste_email_to0~0) (<= 0 |#StackHeapBarrier|) (<= ~__ste_email_to0~0 2) (<= 1 |outgoing_mail_~client#1|) (<= |outgoing_getClientAutoResponse_~retValue_acc~35#1| 1) (= ~__ste_ClientAddressBook_size2~0 0) (<= 2 |outgoing_incoming__wrappee__Verify_~client#1|) (= ~__SELECTED_FEATURE_AutoResponder~0 0) (<= ~__ste_client_autoResponse2~0 0) (<= 1 |outgoing___utac_acc__DecryptAutoResponder_spec__1_#in~msg#1|) (= ~__ste_email_body1~0.base 0) (= ~__ste_ClientKeyring_size2~0 0) (<= |outgoing_verify_~client#1| 2) (<= 2 |outgoing_incoming__wrappee__Verify_#in~client#1|) (<= 1 |outgoing___utac_acc__DecryptAutoResponder_spec__1_~msg#1|) (<= 0 ~__ste_email_encryptionKey0~0) (<= 2 |outgoing_deliver_#in~client#1|) (= |#NULL.base| 0) (<= |outgoing_incoming_#in~client#1| 2) (<= |outgoing_outgoing__wrappee__Keys_#in~msg#1| 1) (<= ~queued_client~0 0))' at error location [2022-11-23 16:07:52,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:07:52,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:07:52,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 16:07:52,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979925810] [2022-11-23 16:07:52,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:07:52,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:07:52,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:52,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:07:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4853, Unknown=0, NotChecked=0, Total=5112 [2022-11-23 16:07:52,940 INFO L87 Difference]: Start difference. First operand 228 states and 319 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 16:07:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:53,277 INFO L93 Difference]: Finished difference Result 578 states and 866 transitions. [2022-11-23 16:07:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:07:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 95 [2022-11-23 16:07:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:53,288 INFO L225 Difference]: With dead ends: 578 [2022-11-23 16:07:53,289 INFO L226 Difference]: Without dead ends: 478 [2022-11-23 16:07:53,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 334.4s TimeCoverageRelationStatistics Valid=259, Invalid=4853, Unknown=0, NotChecked=0, Total=5112 [2022-11-23 16:07:53,295 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 260 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:53,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 886 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:07:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-11-23 16:07:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 463. [2022-11-23 16:07:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 312 states have (on average 1.5064102564102564) internal successors, (470), 315 states have internal predecessors, (470), 127 states have call successors, (127), 23 states have call predecessors, (127), 23 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2022-11-23 16:07:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 723 transitions. [2022-11-23 16:07:53,339 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 723 transitions. Word has length 95 [2022-11-23 16:07:53,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:53,340 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 723 transitions. [2022-11-23 16:07:53,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 16:07:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 723 transitions. [2022-11-23 16:07:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 16:07:53,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:53,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:53,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 16:07:53,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:53,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:53,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1408532469, now seen corresponding path program 1 times [2022-11-23 16:07:53,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:53,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634366344] [2022-11-23 16:07:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:53,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:07:53,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:53,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634366344] [2022-11-23 16:07:53,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634366344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:53,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:53,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348690416] [2022-11-23 16:07:53,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:53,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:53,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:53,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:53,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:53,691 INFO L87 Difference]: Start difference. First operand 463 states and 723 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:53,805 INFO L93 Difference]: Finished difference Result 1131 states and 1804 transitions. [2022-11-23 16:07:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:53,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 101 [2022-11-23 16:07:53,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:53,811 INFO L225 Difference]: With dead ends: 1131 [2022-11-23 16:07:53,811 INFO L226 Difference]: Without dead ends: 700 [2022-11-23 16:07:53,813 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 [2022-11-23 16:07:53,813 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 55 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:53,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 437 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-23 16:07:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 695. [2022-11-23 16:07:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 480 states have (on average 1.5270833333333333) internal successors, (733), 483 states have internal predecessors, (733), 191 states have call successors, (191), 23 states have call predecessors, (191), 23 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-11-23 16:07:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1114 transitions. [2022-11-23 16:07:53,861 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1114 transitions. Word has length 101 [2022-11-23 16:07:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:53,862 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1114 transitions. [2022-11-23 16:07:53,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:53,863 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1114 transitions. [2022-11-23 16:07:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 16:07:53,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:53,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:53,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:07:53,867 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash -656271711, now seen corresponding path program 1 times [2022-11-23 16:07:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:53,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712344531] [2022-11-23 16:07:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:53,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:07:53,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:53,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712344531] [2022-11-23 16:07:53,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712344531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:53,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:53,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:53,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964580045] [2022-11-23 16:07:53,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:53,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:53,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:53,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:53,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:53,989 INFO L87 Difference]: Start difference. First operand 695 states and 1114 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:54,117 INFO L93 Difference]: Finished difference Result 1688 states and 2747 transitions. [2022-11-23 16:07:54,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2022-11-23 16:07:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:54,124 INFO L225 Difference]: With dead ends: 1688 [2022-11-23 16:07:54,124 INFO L226 Difference]: Without dead ends: 1055 [2022-11-23 16:07:54,127 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 [2022-11-23 16:07:54,127 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 53 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:54,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 428 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-11-23 16:07:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1050. [2022-11-23 16:07:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 740 states have (on average 1.5364864864864864) internal successors, (1137), 743 states have internal predecessors, (1137), 286 states have call successors, (286), 23 states have call predecessors, (286), 23 states have return successors, (285), 285 states have call predecessors, (285), 285 states have call successors, (285) [2022-11-23 16:07:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1708 transitions. [2022-11-23 16:07:54,194 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1708 transitions. Word has length 102 [2022-11-23 16:07:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:54,195 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1708 transitions. [2022-11-23 16:07:54,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1708 transitions. [2022-11-23 16:07:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 16:07:54,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:54,201 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:54,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:07:54,201 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash 312139801, now seen corresponding path program 1 times [2022-11-23 16:07:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:54,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887696888] [2022-11-23 16:07:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:54,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:07:54,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:54,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887696888] [2022-11-23 16:07:54,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887696888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:54,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:54,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:54,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543664977] [2022-11-23 16:07:54,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:54,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:54,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:54,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:54,293 INFO L87 Difference]: Start difference. First operand 1050 states and 1708 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:54,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:54,454 INFO L93 Difference]: Finished difference Result 2486 states and 4091 transitions. [2022-11-23 16:07:54,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:54,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 103 [2022-11-23 16:07:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:54,464 INFO L225 Difference]: With dead ends: 2486 [2022-11-23 16:07:54,464 INFO L226 Difference]: Without dead ends: 1578 [2022-11-23 16:07:54,467 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 [2022-11-23 16:07:54,468 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 51 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:54,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 420 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2022-11-23 16:07:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1573. [2022-11-23 16:07:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1140 states have (on average 1.542982456140351) internal successors, (1759), 1143 states have internal predecessors, (1759), 409 states have call successors, (409), 23 states have call predecessors, (409), 23 states have return successors, (408), 408 states have call predecessors, (408), 408 states have call successors, (408) [2022-11-23 16:07:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 2576 transitions. [2022-11-23 16:07:54,611 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 2576 transitions. Word has length 103 [2022-11-23 16:07:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:54,612 INFO L495 AbstractCegarLoop]: Abstraction has 1573 states and 2576 transitions. [2022-11-23 16:07:54,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 2576 transitions. [2022-11-23 16:07:54,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-23 16:07:54,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:54,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 16:07:54,623 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1928728766, now seen corresponding path program 1 times [2022-11-23 16:07:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:54,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706238284] [2022-11-23 16:07:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:54,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:07:54,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:54,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706238284] [2022-11-23 16:07:54,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706238284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:54,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:54,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:54,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013503384] [2022-11-23 16:07:54,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:54,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:54,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:54,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:54,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:54,754 INFO L87 Difference]: Start difference. First operand 1573 states and 2576 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:54,958 INFO L93 Difference]: Finished difference Result 3696 states and 6119 transitions. [2022-11-23 16:07:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 104 [2022-11-23 16:07:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:54,973 INFO L225 Difference]: With dead ends: 3696 [2022-11-23 16:07:54,973 INFO L226 Difference]: Without dead ends: 2402 [2022-11-23 16:07:54,978 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 [2022-11-23 16:07:54,979 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 49 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:54,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 420 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-11-23 16:07:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 2397. [2022-11-23 16:07:55,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 1785 states have (on average 1.546778711484594) internal successors, (2761), 1788 states have internal predecessors, (2761), 588 states have call successors, (588), 23 states have call predecessors, (588), 23 states have return successors, (587), 587 states have call predecessors, (587), 587 states have call successors, (587) [2022-11-23 16:07:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3936 transitions. [2022-11-23 16:07:55,163 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3936 transitions. Word has length 104 [2022-11-23 16:07:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:55,164 INFO L495 AbstractCegarLoop]: Abstraction has 2397 states and 3936 transitions. [2022-11-23 16:07:55,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3936 transitions. [2022-11-23 16:07:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-23 16:07:55,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:55,176 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:55,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 16:07:55,176 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1085474133, now seen corresponding path program 1 times [2022-11-23 16:07:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:55,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731825647] [2022-11-23 16:07:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:55,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:07:55,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:55,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731825647] [2022-11-23 16:07:55,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731825647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:55,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:55,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:55,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268125958] [2022-11-23 16:07:55,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:55,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:55,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:55,271 INFO L87 Difference]: Start difference. First operand 2397 states and 3936 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:55,573 INFO L93 Difference]: Finished difference Result 5907 states and 9791 transitions. [2022-11-23 16:07:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:55,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 105 [2022-11-23 16:07:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:55,599 INFO L225 Difference]: With dead ends: 5907 [2022-11-23 16:07:55,600 INFO L226 Difference]: Without dead ends: 3932 [2022-11-23 16:07:55,608 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 [2022-11-23 16:07:55,611 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 47 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:55,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 436 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:55,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2022-11-23 16:07:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3927. [2022-11-23 16:07:55,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 2939 states have (on average 1.536577067029602) internal successors, (4516), 2942 states have internal predecessors, (4516), 964 states have call successors, (964), 23 states have call predecessors, (964), 23 states have return successors, (963), 963 states have call predecessors, (963), 963 states have call successors, (963) [2022-11-23 16:07:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 6443 transitions. [2022-11-23 16:07:55,957 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 6443 transitions. Word has length 105 [2022-11-23 16:07:55,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:55,958 INFO L495 AbstractCegarLoop]: Abstraction has 3927 states and 6443 transitions. [2022-11-23 16:07:55,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:55,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 6443 transitions. [2022-11-23 16:07:55,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-23 16:07:55,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:55,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:55,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 16:07:55,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:55,975 INFO L85 PathProgramCache]: Analyzing trace with hash -396362234, now seen corresponding path program 1 times [2022-11-23 16:07:55,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:55,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299680152] [2022-11-23 16:07:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:55,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:07:56,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:56,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299680152] [2022-11-23 16:07:56,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299680152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:56,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:56,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:56,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139295154] [2022-11-23 16:07:56,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:56,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:56,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:56,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:56,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:56,100 INFO L87 Difference]: Start difference. First operand 3927 states and 6443 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:56,560 INFO L93 Difference]: Finished difference Result 9768 states and 16188 transitions. [2022-11-23 16:07:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:56,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 106 [2022-11-23 16:07:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:56,601 INFO L225 Difference]: With dead ends: 9768 [2022-11-23 16:07:56,601 INFO L226 Difference]: Without dead ends: 6529 [2022-11-23 16:07:56,611 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 [2022-11-23 16:07:56,612 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 45 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:56,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 425 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6529 states. [2022-11-23 16:07:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6529 to 6524. [2022-11-23 16:07:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6524 states, 4930 states have (on average 1.5328600405679513) internal successors, (7557), 4933 states have internal predecessors, (7557), 1570 states have call successors, (1570), 23 states have call predecessors, (1570), 23 states have return successors, (1569), 1569 states have call predecessors, (1569), 1569 states have call successors, (1569) [2022-11-23 16:07:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6524 states to 6524 states and 10696 transitions. [2022-11-23 16:07:57,182 INFO L78 Accepts]: Start accepts. Automaton has 6524 states and 10696 transitions. Word has length 106 [2022-11-23 16:07:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:57,183 INFO L495 AbstractCegarLoop]: Abstraction has 6524 states and 10696 transitions. [2022-11-23 16:07:57,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6524 states and 10696 transitions. [2022-11-23 16:07:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 16:07:57,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:57,211 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:57,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 16:07:57,211 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash -578959273, now seen corresponding path program 1 times [2022-11-23 16:07:57,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:57,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400681770] [2022-11-23 16:07:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:57,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:07:57,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:57,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400681770] [2022-11-23 16:07:57,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400681770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:57,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:57,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:57,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398003884] [2022-11-23 16:07:57,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:57,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:57,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:57,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:57,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:57,316 INFO L87 Difference]: Start difference. First operand 6524 states and 10696 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:58,196 INFO L93 Difference]: Finished difference Result 17020 states and 28106 transitions. [2022-11-23 16:07:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:58,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 107 [2022-11-23 16:07:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:58,269 INFO L225 Difference]: With dead ends: 17020 [2022-11-23 16:07:58,270 INFO L226 Difference]: Without dead ends: 11473 [2022-11-23 16:07:58,285 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 [2022-11-23 16:07:58,286 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 43 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:58,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 437 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11473 states. [2022-11-23 16:07:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11473 to 11468. [2022-11-23 16:07:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11468 states, 8671 states have (on average 1.5197785722523354) internal successors, (13178), 8674 states have internal predecessors, (13178), 2773 states have call successors, (2773), 23 states have call predecessors, (2773), 23 states have return successors, (2772), 2772 states have call predecessors, (2772), 2772 states have call successors, (2772) [2022-11-23 16:07:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11468 states to 11468 states and 18723 transitions. [2022-11-23 16:07:59,226 INFO L78 Accepts]: Start accepts. Automaton has 11468 states and 18723 transitions. Word has length 107 [2022-11-23 16:07:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:59,227 INFO L495 AbstractCegarLoop]: Abstraction has 11468 states and 18723 transitions. [2022-11-23 16:07:59,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:07:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 11468 states and 18723 transitions. [2022-11-23 16:07:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-23 16:07:59,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:59,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:59,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 16:07:59,267 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:59,268 INFO L85 PathProgramCache]: Analyzing trace with hash -76027321, now seen corresponding path program 1 times [2022-11-23 16:07:59,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:59,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189944844] [2022-11-23 16:07:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:59,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:07:59,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:59,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189944844] [2022-11-23 16:07:59,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189944844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:59,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:59,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:59,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054808737] [2022-11-23 16:07:59,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:59,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:59,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:59,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:59,447 INFO L87 Difference]: Start difference. First operand 11468 states and 18723 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:08:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:01,145 INFO L93 Difference]: Finished difference Result 30339 states and 49872 transitions. [2022-11-23 16:08:01,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:08:01,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 108 [2022-11-23 16:08:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:01,229 INFO L225 Difference]: With dead ends: 30339 [2022-11-23 16:08:01,229 INFO L226 Difference]: Without dead ends: 20300 [2022-11-23 16:08:01,263 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 [2022-11-23 16:08:01,264 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 41 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:01,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 425 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:08:01,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20300 states. [2022-11-23 16:08:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20300 to 20295. [2022-11-23 16:08:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20295 states, 15459 states have (on average 1.5121935442137266) internal successors, (23377), 15462 states have internal predecessors, (23377), 4812 states have call successors, (4812), 23 states have call predecessors, (4812), 23 states have return successors, (4811), 4811 states have call predecessors, (4811), 4811 states have call successors, (4811) [2022-11-23 16:08:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20295 states to 20295 states and 33000 transitions. [2022-11-23 16:08:02,994 INFO L78 Accepts]: Start accepts. Automaton has 20295 states and 33000 transitions. Word has length 108 [2022-11-23 16:08:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:02,996 INFO L495 AbstractCegarLoop]: Abstraction has 20295 states and 33000 transitions. [2022-11-23 16:08:02,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:08:02,997 INFO L276 IsEmpty]: Start isEmpty. Operand 20295 states and 33000 transitions. [2022-11-23 16:08:03,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 16:08:03,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:03,042 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:03,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 16:08:03,042 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:03,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1822981191, now seen corresponding path program 1 times [2022-11-23 16:08:03,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:03,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002723369] [2022-11-23 16:08:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:03,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:08:03,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:03,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002723369] [2022-11-23 16:08:03,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002723369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:08:03,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:08:03,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:08:03,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320071220] [2022-11-23 16:08:03,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:03,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:08:03,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:03,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:08:03,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:08:03,140 INFO L87 Difference]: Start difference. First operand 20295 states and 33000 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:08:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:05,641 INFO L93 Difference]: Finished difference Result 55051 states and 89964 transitions. [2022-11-23 16:08:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:08:05,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 109 [2022-11-23 16:08:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:05,803 INFO L225 Difference]: With dead ends: 55051 [2022-11-23 16:08:05,804 INFO L226 Difference]: Without dead ends: 36740 [2022-11-23 16:08:05,860 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 [2022-11-23 16:08:05,861 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 39 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:05,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 427 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:08:05,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36740 states. [2022-11-23 16:08:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36740 to 36735. [2022-11-23 16:08:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36735 states, 28184 states have (on average 1.5015966505818905) internal successors, (42321), 28187 states have internal predecessors, (42321), 8527 states have call successors, (8527), 23 states have call predecessors, (8527), 23 states have return successors, (8526), 8526 states have call predecessors, (8526), 8526 states have call successors, (8526) [2022-11-23 16:08:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36735 states to 36735 states and 59374 transitions. [2022-11-23 16:08:08,818 INFO L78 Accepts]: Start accepts. Automaton has 36735 states and 59374 transitions. Word has length 109 [2022-11-23 16:08:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:08,818 INFO L495 AbstractCegarLoop]: Abstraction has 36735 states and 59374 transitions. [2022-11-23 16:08:08,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:08:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 36735 states and 59374 transitions. [2022-11-23 16:08:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-23 16:08:08,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:08,869 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:08,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 16:08:08,870 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:08,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1696704793, now seen corresponding path program 1 times [2022-11-23 16:08:08,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:08,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881492851] [2022-11-23 16:08:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:08,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:08:08,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:08,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881492851] [2022-11-23 16:08:08,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881492851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:08:08,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:08:08,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:08:08,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195992223] [2022-11-23 16:08:08,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:08,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:08:08,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:08:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:08:08,997 INFO L87 Difference]: Start difference. First operand 36735 states and 59374 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:08:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:12,703 INFO L93 Difference]: Finished difference Result 67668 states and 109545 transitions. [2022-11-23 16:08:12,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:08:12,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 110 [2022-11-23 16:08:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:13,194 INFO L225 Difference]: With dead ends: 67668 [2022-11-23 16:08:13,195 INFO L226 Difference]: Without dead ends: 67568 [2022-11-23 16:08:13,219 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 [2022-11-23 16:08:13,220 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 37 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:13,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 425 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:08:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67568 states. [2022-11-23 16:08:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67568 to 67563. [2022-11-23 16:08:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67563 states, 52213 states have (on average 1.4876946354356195) internal successors, (77677), 52216 states have internal predecessors, (77677), 15326 states have call successors, (15326), 23 states have call predecessors, (15326), 23 states have return successors, (15325), 15325 states have call predecessors, (15325), 15325 states have call successors, (15325) [2022-11-23 16:08:18,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67563 states to 67563 states and 108328 transitions. [2022-11-23 16:08:18,605 INFO L78 Accepts]: Start accepts. Automaton has 67563 states and 108328 transitions. Word has length 110 [2022-11-23 16:08:18,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:18,606 INFO L495 AbstractCegarLoop]: Abstraction has 67563 states and 108328 transitions. [2022-11-23 16:08:18,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 16:08:18,606 INFO L276 IsEmpty]: Start isEmpty. Operand 67563 states and 108328 transitions. [2022-11-23 16:08:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 16:08:18,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:18,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:18,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 16:08:18,662 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:18,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:18,662 INFO L85 PathProgramCache]: Analyzing trace with hash -561093896, now seen corresponding path program 1 times [2022-11-23 16:08:18,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:18,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17690893] [2022-11-23 16:08:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:18,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 16:08:20,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:20,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17690893] [2022-11-23 16:08:20,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17690893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:08:20,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062083889] [2022-11-23 16:08:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:20,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:08:20,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:08:20,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:08:20,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:08:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:20,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 16:08:20,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:08:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 16:08:21,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:08:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 16:08:24,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062083889] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 16:08:24,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:08:24,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [19, 19] total 53 [2022-11-23 16:08:24,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132676515] [2022-11-23 16:08:24,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:24,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 16:08:24,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 16:08:24,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2571, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 16:08:24,149 INFO L87 Difference]: Start difference. First operand 67563 states and 108328 transitions. Second operand has 19 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 12 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-23 16:08:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:35,975 INFO L93 Difference]: Finished difference Result 100737 states and 161273 transitions. [2022-11-23 16:08:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 16:08:35,976 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 12 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) Word has length 111 [2022-11-23 16:08:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:36,426 INFO L225 Difference]: With dead ends: 100737 [2022-11-23 16:08:36,427 INFO L226 Difference]: Without dead ends: 100635 [2022-11-23 16:08:36,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=403, Invalid=4709, Unknown=0, NotChecked=0, Total=5112 [2022-11-23 16:08:36,467 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 623 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 2496 SdHoareTripleChecker+Invalid, 2504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:36,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 2496 Invalid, 2504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 16:08:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100635 states. [2022-11-23 16:08:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100635 to 100631. [2022-11-23 16:08:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100631 states, 77881 states have (on average 1.4865243127335293) internal successors, (115772), 77888 states have internal predecessors, (115772), 22689 states have call successors, (22689), 61 states have call predecessors, (22689), 60 states have return successors, (22687), 22687 states have call predecessors, (22687), 22687 states have call successors, (22687) [2022-11-23 16:08:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100631 states to 100631 states and 161148 transitions. [2022-11-23 16:08:46,440 INFO L78 Accepts]: Start accepts. Automaton has 100631 states and 161148 transitions. Word has length 111 [2022-11-23 16:08:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:46,440 INFO L495 AbstractCegarLoop]: Abstraction has 100631 states and 161148 transitions. [2022-11-23 16:08:46,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 12 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-23 16:08:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 100631 states and 161148 transitions. [2022-11-23 16:08:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 16:08:46,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:46,522 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:46,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:08:46,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b5d7bba-02a6-46ff-9063-0fab8352e113/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 16:08:46,729 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:46,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1783379339, now seen corresponding path program 2 times [2022-11-23 16:08:46,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:46,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856224050] [2022-11-23 16:08:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:46,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 16:08:46,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:46,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856224050] [2022-11-23 16:08:46,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856224050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:08:46,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:08:46,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:08:46,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327806642] [2022-11-23 16:08:46,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:46,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:08:46,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:08:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:08:46,927 INFO L87 Difference]: Start difference. First operand 100631 states and 161148 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17)