./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/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_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V --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 --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:28:35,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:28:35,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:28:35,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:28:35,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:28:35,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:28:35,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:28:35,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:28:35,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:28:35,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:28:35,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:28:35,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:28:35,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:28:35,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:28:35,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:28:35,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:28:35,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:28:35,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:28:35,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:28:35,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:28:35,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:28:35,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:28:35,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:28:35,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:28:35,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:28:35,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:28:35,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:28:35,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:28:35,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:28:35,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:28:35,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:28:35,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:28:35,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:28:35,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:28:35,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:28:35,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:28:35,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:28:35,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:28:35,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:28:35,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:28:35,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:28:35,365 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:28:35,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:28:35,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:28:35,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:28:35,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:28:35,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:28:35,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:28:35,407 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:28:35,407 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:28:35,407 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:28:35,407 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:28:35,408 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:28:35,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:28:35,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:28:35,408 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:28:35,408 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:28:35,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:28:35,409 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:28:35,409 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:28:35,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:28:35,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:28:35,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:28:35,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:28:35,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:28:35,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:28:35,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:28:35,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:28:35,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:28:35,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:28:35,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:28:35,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:28:35,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:28:35,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:28:35,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:28:35,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:28:35,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:28:35,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:28:35,414 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:28:35,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:28:35,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:28:35,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:28:35,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:28:35,415 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4fb36b23f327758af91661b12ca1735faf7949901dbd5c1543c17ea0384ceb9 [2021-11-23 02:28:35,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:28:35,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:28:35,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:28:35,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:28:35,664 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:28:35,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/email_spec11_product30.cil.c [2021-11-23 02:28:35,754 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/data/cf641bd83/ecde10f1c68c41338463f929201fe822/FLAGb4d46689f [2021-11-23 02:28:36,398 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:28:36,399 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c [2021-11-23 02:28:36,420 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/data/cf641bd83/ecde10f1c68c41338463f929201fe822/FLAGb4d46689f [2021-11-23 02:28:36,638 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/data/cf641bd83/ecde10f1c68c41338463f929201fe822 [2021-11-23 02:28:36,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:28:36,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:28:36,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:28:36,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:28:36,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:28:36,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:28:36" (1/1) ... [2021-11-23 02:28:36,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d9f860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:36, skipping insertion in model container [2021-11-23 02:28:36,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:28:36" (1/1) ... [2021-11-23 02:28:36,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:28:36,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:28:37,205 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c[29507,29520] [2021-11-23 02:28:37,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:28:37,335 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:28:37,425 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c[29507,29520] [2021-11-23 02:28:37,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:28:37,509 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:28:37,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37 WrapperNode [2021-11-23 02:28:37,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:28:37,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:28:37,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:28:37,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:28:37,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (1/1) ... [2021-11-23 02:28:37,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (1/1) ... [2021-11-23 02:28:37,658 INFO L137 Inliner]: procedures = 131, calls = 217, calls flagged for inlining = 60, calls inlined = 50, statements flattened = 903 [2021-11-23 02:28:37,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:28:37,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:28:37,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:28:37,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:28:37,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (1/1) ... [2021-11-23 02:28:37,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (1/1) ... [2021-11-23 02:28:37,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (1/1) ... [2021-11-23 02:28:37,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (1/1) ... [2021-11-23 02:28:37,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (1/1) ... [2021-11-23 02:28:37,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (1/1) ... [2021-11-23 02:28:37,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (1/1) ... [2021-11-23 02:28:37,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:28:37,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:28:37,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:28:37,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:28:37,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (1/1) ... [2021-11-23 02:28:37,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:28:37,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:37,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:28:37,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:28:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-23 02:28:37,885 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-23 02:28:37,885 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-23 02:28:37,885 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-23 02:28:37,885 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-23 02:28:37,886 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-23 02:28:37,886 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-23 02:28:37,886 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-23 02:28:37,886 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-23 02:28:37,886 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-23 02:28:37,887 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-23 02:28:37,887 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-23 02:28:37,887 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-23 02:28:37,887 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-23 02:28:37,887 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-23 02:28:37,887 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-23 02:28:37,887 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-23 02:28:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-23 02:28:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-23 02:28:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-23 02:28:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 02:28:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-23 02:28:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-23 02:28:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-23 02:28:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-23 02:28:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:28:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-23 02:28:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-23 02:28:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-23 02:28:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-23 02:28:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-23 02:28:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-23 02:28:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-23 02:28:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-23 02:28:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-23 02:28:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-23 02:28:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-23 02:28:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-23 02:28:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-23 02:28:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-23 02:28:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-23 02:28:37,892 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-23 02:28:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-23 02:28:37,892 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-23 02:28:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-23 02:28:37,892 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-23 02:28:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:28:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-23 02:28:37,893 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-23 02:28:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:28:37,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:28:38,179 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:28:38,181 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:28:38,983 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:28:39,354 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:28:39,355 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:28:39,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:28:39 BoogieIcfgContainer [2021-11-23 02:28:39,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:28:39,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:28:39,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:28:39,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:28:39,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:28:36" (1/3) ... [2021-11-23 02:28:39,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da7ae39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:28:39, skipping insertion in model container [2021-11-23 02:28:39,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:37" (2/3) ... [2021-11-23 02:28:39,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da7ae39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:28:39, skipping insertion in model container [2021-11-23 02:28:39,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:28:39" (3/3) ... [2021-11-23 02:28:39,366 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product30.cil.c [2021-11-23 02:28:39,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:28:39,372 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:28:39,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:28:39,429 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:28:39,429 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:28:39,451 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) [2021-11-23 02:28:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:28:39,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:39,465 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:39,465 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:39,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1991215324, now seen corresponding path program 1 times [2021-11-23 02:28:39,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:39,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359892762] [2021-11-23 02:28:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:39,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:28:39,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:39,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359892762] [2021-11-23 02:28:39,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359892762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:39,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:39,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:28:39,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316694738] [2021-11-23 02:28:39,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:39,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:28:39,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:39,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:28:39,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:28:39,960 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) [2021-11-23 02:28:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:40,119 INFO L93 Difference]: Finished difference Result 289 states and 376 transitions. [2021-11-23 02:28:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:28:40,121 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 [2021-11-23 02:28:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:40,137 INFO L225 Difference]: With dead ends: 289 [2021-11-23 02:28:40,138 INFO L226 Difference]: Without dead ends: 183 [2021-11-23 02:28:40,144 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:40,148 INFO L933 BasicCegarLoop]: 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 [2021-11-23 02:28:40,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:28:40,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-23 02:28:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-11-23 02:28:40,211 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) [2021-11-23 02:28:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 242 transitions. [2021-11-23 02:28:40,216 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 242 transitions. Word has length 88 [2021-11-23 02:28:40,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:40,217 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 242 transitions. [2021-11-23 02:28:40,218 INFO L471 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) [2021-11-23 02:28:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 242 transitions. [2021-11-23 02:28:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 02:28:40,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:40,224 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:40,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:28:40,225 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:40,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1126541311, now seen corresponding path program 1 times [2021-11-23 02:28:40,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:40,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171867498] [2021-11-23 02:28:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:40,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:28:40,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171867498] [2021-11-23 02:28:40,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171867498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:40,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:40,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:40,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681200997] [2021-11-23 02:28:40,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:40,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:40,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:40,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:40,410 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) [2021-11-23 02:28:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:40,509 INFO L93 Difference]: Finished difference Result 285 states and 364 transitions. [2021-11-23 02:28:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:40,510 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 [2021-11-23 02:28:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:40,513 INFO L225 Difference]: With dead ends: 285 [2021-11-23 02:28:40,513 INFO L226 Difference]: Without dead ends: 185 [2021-11-23 02:28:40,515 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:40,517 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 0 mSDsluCounter, 239 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 [2021-11-23 02:28:40,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 417 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:28:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-23 02:28:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-23 02:28:40,537 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) [2021-11-23 02:28:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 244 transitions. [2021-11-23 02:28:40,540 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 244 transitions. Word has length 89 [2021-11-23 02:28:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:40,540 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 244 transitions. [2021-11-23 02:28:40,541 INFO L471 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) [2021-11-23 02:28:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 244 transitions. [2021-11-23 02:28:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:28:40,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:40,546 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:40,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:28:40,547 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash 468194357, now seen corresponding path program 1 times [2021-11-23 02:28:40,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:40,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715898860] [2021-11-23 02:28:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:40,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:28:40,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:40,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715898860] [2021-11-23 02:28:40,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715898860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:40,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:40,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:40,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572020387] [2021-11-23 02:28:40,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:40,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:40,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:40,634 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) [2021-11-23 02:28:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:40,730 INFO L93 Difference]: Finished difference Result 400 states and 547 transitions. [2021-11-23 02:28:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:40,731 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 [2021-11-23 02:28:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:40,734 INFO L225 Difference]: With dead ends: 400 [2021-11-23 02:28:40,734 INFO L226 Difference]: Without dead ends: 233 [2021-11-23 02:28:40,735 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:40,737 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 57 mSDsluCounter, 234 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 [2021-11-23 02:28:40,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 429 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:28:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-23 02:28:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 228. [2021-11-23 02:28:40,810 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) [2021-11-23 02:28:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 319 transitions. [2021-11-23 02:28:40,812 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 319 transitions. Word has length 94 [2021-11-23 02:28:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:40,813 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 319 transitions. [2021-11-23 02:28:40,813 INFO L471 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) [2021-11-23 02:28:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 319 transitions. [2021-11-23 02:28:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:28:40,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:40,817 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:40,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:28:40,817 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1757014210, now seen corresponding path program 1 times [2021-11-23 02:28:40,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:40,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31698383] [2021-11-23 02:28:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:40,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:28:40,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:40,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31698383] [2021-11-23 02:28:40,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31698383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:40,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882828974] [2021-11-23 02:28:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:40,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:40,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:40,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:40,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:28:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:28:41,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:28:41,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:28:41,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882828974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:41,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169790167] [2021-11-23 02:28:41,727 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2021-11-23 02:28:41,727 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:28:41,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:28:41,738 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:28:41,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:29:10,502 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2021-11-23 02:29:10,796 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2021-11-23 02:29:11,079 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 267 for LOIs [2021-11-23 02:29:13,170 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 237 for LOIs [2021-11-23 02:29:13,228 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 269 for LOIs [2021-11-23 02:29:37,033 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 251 for LOIs [2021-11-23 02:29:37,688 INFO L197 IcfgInterpreter]: Interpreting procedure isEncrypted with input of size 251 for LOIs [2021-11-23 02:29:37,738 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 452 for LOIs [2021-11-23 02:29:38,220 INFO L197 IcfgInterpreter]: Interpreting procedure findPublicKey with input of size 249 for LOIs [2021-11-23 02:29:38,295 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 247 for LOIs [2021-11-23 02:29:38,340 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 473 for LOIs [2021-11-23 02:29:39,798 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:40,712 WARN L227 SmtUtils]: Spent 13.75s on a formula simplification. DAG size of input: 583 DAG size of output: 394 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:30:56,418 WARN L227 SmtUtils]: Spent 15.39s on a formula simplification. DAG size of input: 585 DAG size of output: 420 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:31:09,394 WARN L227 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 561 DAG size of output: 356 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:31:29,738 WARN L227 SmtUtils]: Spent 14.71s on a formula simplification. DAG size of input: 473 DAG size of output: 364 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:32:05,038 WARN L227 SmtUtils]: Spent 12.94s on a formula simplification. DAG size of input: 452 DAG size of output: 346 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:32:21,534 WARN L227 SmtUtils]: Spent 13.66s on a formula simplification. DAG size of input: 478 DAG size of output: 362 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:33:10,493 WARN L227 SmtUtils]: Spent 9.97s on a formula simplification. DAG size of input: 586 DAG size of output: 480 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:33:19,205 WARN L227 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 590 DAG size of output: 417 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:34:06,079 WARN L227 SmtUtils]: Spent 17.61s on a formula simplification. DAG size of input: 645 DAG size of output: 419 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:34:19,089 WARN L227 SmtUtils]: Spent 11.07s on a formula simplification. DAG size of input: 642 DAG size of output: 506 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:34:29,158 WARN L227 SmtUtils]: Spent 8.87s on a formula simplification. DAG size of input: 636 DAG size of output: 445 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:34:35,319 WARN L227 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 486 DAG size of output: 449 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:34:42,002 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 508 DAG size of output: 469 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:34:50,795 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 [2021-11-23 02:34:50,796 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:34:50,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:34:50,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 02:34:50,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522670907] [2021-11-23 02:34:50,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:34:50,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:34:50,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:34:50,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4853, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 02:34:50,803 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) [2021-11-23 02:34:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:51,223 INFO L93 Difference]: Finished difference Result 578 states and 866 transitions. [2021-11-23 02:34:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:34:51,224 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 [2021-11-23 02:34:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:51,236 INFO L225 Difference]: With dead ends: 578 [2021-11-23 02:34:51,236 INFO L226 Difference]: Without dead ends: 478 [2021-11-23 02:34:51,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 311.0s TimeCoverageRelationStatistics Valid=259, Invalid=4853, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 02:34:51,251 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 260 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2021-11-23 02:34:51,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 886 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:34:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-23 02:34:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 463. [2021-11-23 02:34:51,300 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) [2021-11-23 02:34:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 723 transitions. [2021-11-23 02:34:51,305 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 723 transitions. Word has length 95 [2021-11-23 02:34:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:51,306 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 723 transitions. [2021-11-23 02:34:51,306 INFO L471 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) [2021-11-23 02:34:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 723 transitions. [2021-11-23 02:34:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 02:34:51,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:51,312 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:34:51,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:51,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:51,535 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:51,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1408532469, now seen corresponding path program 1 times [2021-11-23 02:34:51,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:51,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139033504] [2021-11-23 02:34:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:51,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:34:51,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139033504] [2021-11-23 02:34:51,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139033504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:51,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:51,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:34:51,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111621629] [2021-11-23 02:34:51,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:51,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:34:51,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:51,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:34:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:34:51,675 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) [2021-11-23 02:34:51,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:51,801 INFO L93 Difference]: Finished difference Result 1131 states and 1804 transitions. [2021-11-23 02:34:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:34:51,802 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 [2021-11-23 02:34:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:51,809 INFO L225 Difference]: With dead ends: 1131 [2021-11-23 02:34:51,810 INFO L226 Difference]: Without dead ends: 700 [2021-11-23 02:34:51,812 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:34:51,813 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 55 mSDsluCounter, 239 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 [2021-11-23 02:34:51,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 437 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:34:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-23 02:34:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 695. [2021-11-23 02:34:51,864 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) [2021-11-23 02:34:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1114 transitions. [2021-11-23 02:34:51,871 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1114 transitions. Word has length 101 [2021-11-23 02:34:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:51,872 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1114 transitions. [2021-11-23 02:34:51,872 INFO L471 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) [2021-11-23 02:34:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1114 transitions. [2021-11-23 02:34:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:34:51,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:51,878 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:34:51,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:34:51,878 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash -656271711, now seen corresponding path program 1 times [2021-11-23 02:34:51,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:51,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482044978] [2021-11-23 02:34:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:51,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:34:51,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482044978] [2021-11-23 02:34:51,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482044978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:51,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:51,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:34:51,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563548021] [2021-11-23 02:34:51,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:51,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:34:51,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:51,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:34:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:34:51,960 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) [2021-11-23 02:34:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:52,113 INFO L93 Difference]: Finished difference Result 1688 states and 2747 transitions. [2021-11-23 02:34:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:34:52,114 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 [2021-11-23 02:34:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:52,126 INFO L225 Difference]: With dead ends: 1688 [2021-11-23 02:34:52,126 INFO L226 Difference]: Without dead ends: 1055 [2021-11-23 02:34:52,129 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:34:52,130 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 53 mSDsluCounter, 236 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 [2021-11-23 02:34:52,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 428 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:34:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-11-23 02:34:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1050. [2021-11-23 02:34:52,205 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) [2021-11-23 02:34:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1708 transitions. [2021-11-23 02:34:52,215 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1708 transitions. Word has length 102 [2021-11-23 02:34:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:52,216 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1708 transitions. [2021-11-23 02:34:52,216 INFO L471 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) [2021-11-23 02:34:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1708 transitions. [2021-11-23 02:34:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 02:34:52,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:52,224 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:34:52,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:34:52,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash 312139801, now seen corresponding path program 1 times [2021-11-23 02:34:52,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:52,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818160920] [2021-11-23 02:34:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:52,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:34:52,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:52,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818160920] [2021-11-23 02:34:52,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818160920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:52,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:52,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:34:52,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882702900] [2021-11-23 02:34:52,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:52,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:34:52,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:34:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:34:52,307 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) [2021-11-23 02:34:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:52,490 INFO L93 Difference]: Finished difference Result 2486 states and 4091 transitions. [2021-11-23 02:34:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:34:52,491 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 [2021-11-23 02:34:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:52,509 INFO L225 Difference]: With dead ends: 2486 [2021-11-23 02:34:52,509 INFO L226 Difference]: Without dead ends: 1578 [2021-11-23 02:34:52,514 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:34:52,515 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 51 mSDsluCounter, 232 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 [2021-11-23 02:34:52,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 420 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:34:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-11-23 02:34:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1573. [2021-11-23 02:34:52,639 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) [2021-11-23 02:34:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 2576 transitions. [2021-11-23 02:34:52,654 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 2576 transitions. Word has length 103 [2021-11-23 02:34:52,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:52,655 INFO L470 AbstractCegarLoop]: Abstraction has 1573 states and 2576 transitions. [2021-11-23 02:34:52,655 INFO L471 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) [2021-11-23 02:34:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 2576 transitions. [2021-11-23 02:34:52,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 02:34:52,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:52,673 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:34:52,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:34:52,673 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:52,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1928728766, now seen corresponding path program 1 times [2021-11-23 02:34:52,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:52,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71051113] [2021-11-23 02:34:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:52,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:34:52,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:52,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71051113] [2021-11-23 02:34:52,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71051113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:52,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:52,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:34:52,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434970403] [2021-11-23 02:34:52,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:52,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:34:52,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:52,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:34:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:34:52,766 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) [2021-11-23 02:34:52,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:52,992 INFO L93 Difference]: Finished difference Result 3696 states and 6119 transitions. [2021-11-23 02:34:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:34:52,993 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 [2021-11-23 02:34:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:53,019 INFO L225 Difference]: With dead ends: 3696 [2021-11-23 02:34:53,020 INFO L226 Difference]: Without dead ends: 2402 [2021-11-23 02:34:53,029 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:34:53,030 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 49 mSDsluCounter, 232 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 [2021-11-23 02:34:53,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 420 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:34:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-11-23 02:34:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 2397. [2021-11-23 02:34:53,226 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) [2021-11-23 02:34:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3936 transitions. [2021-11-23 02:34:53,250 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3936 transitions. Word has length 104 [2021-11-23 02:34:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:53,251 INFO L470 AbstractCegarLoop]: Abstraction has 2397 states and 3936 transitions. [2021-11-23 02:34:53,251 INFO L471 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) [2021-11-23 02:34:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3936 transitions. [2021-11-23 02:34:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 02:34:53,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:53,301 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:34:53,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:34:53,301 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:53,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1085474133, now seen corresponding path program 1 times [2021-11-23 02:34:53,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:53,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028627530] [2021-11-23 02:34:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:53,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:34:53,418 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:53,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028627530] [2021-11-23 02:34:53,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028627530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:53,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:53,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:34:53,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209401642] [2021-11-23 02:34:53,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:53,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:34:53,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:53,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:34:53,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:34:53,421 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) [2021-11-23 02:34:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:53,712 INFO L93 Difference]: Finished difference Result 5907 states and 9791 transitions. [2021-11-23 02:34:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:34:53,713 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 [2021-11-23 02:34:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:53,753 INFO L225 Difference]: With dead ends: 5907 [2021-11-23 02:34:53,753 INFO L226 Difference]: Without dead ends: 3932 [2021-11-23 02:34:53,763 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:34:53,764 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 47 mSDsluCounter, 239 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 [2021-11-23 02:34:53,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 436 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:34:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-11-23 02:34:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3927. [2021-11-23 02:34:54,070 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) [2021-11-23 02:34:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 6443 transitions. [2021-11-23 02:34:54,104 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 6443 transitions. Word has length 105 [2021-11-23 02:34:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:54,105 INFO L470 AbstractCegarLoop]: Abstraction has 3927 states and 6443 transitions. [2021-11-23 02:34:54,105 INFO L471 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) [2021-11-23 02:34:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 6443 transitions. [2021-11-23 02:34:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 02:34:54,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:54,131 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:34:54,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:34:54,131 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:54,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash -396362234, now seen corresponding path program 1 times [2021-11-23 02:34:54,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:54,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482611457] [2021-11-23 02:34:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:54,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:34:54,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:54,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482611457] [2021-11-23 02:34:54,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482611457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:54,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:54,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:34:54,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510082852] [2021-11-23 02:34:54,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:54,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:34:54,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:34:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:34:54,237 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) [2021-11-23 02:34:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:54,690 INFO L93 Difference]: Finished difference Result 9768 states and 16188 transitions. [2021-11-23 02:34:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:34:54,691 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 [2021-11-23 02:34:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:54,756 INFO L225 Difference]: With dead ends: 9768 [2021-11-23 02:34:54,756 INFO L226 Difference]: Without dead ends: 6529 [2021-11-23 02:34:54,769 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:34:54,770 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 45 mSDsluCounter, 235 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 [2021-11-23 02:34:54,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 425 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:34:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6529 states. [2021-11-23 02:34:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6529 to 6524. [2021-11-23 02:34:55,251 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) [2021-11-23 02:34:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6524 states to 6524 states and 10696 transitions. [2021-11-23 02:34:55,286 INFO L78 Accepts]: Start accepts. Automaton has 6524 states and 10696 transitions. Word has length 106 [2021-11-23 02:34:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:55,286 INFO L470 AbstractCegarLoop]: Abstraction has 6524 states and 10696 transitions. [2021-11-23 02:34:55,287 INFO L471 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) [2021-11-23 02:34:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 6524 states and 10696 transitions. [2021-11-23 02:34:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 02:34:55,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:55,324 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:34:55,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:34:55,324 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:55,325 INFO L85 PathProgramCache]: Analyzing trace with hash -578959273, now seen corresponding path program 1 times [2021-11-23 02:34:55,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:55,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150897240] [2021-11-23 02:34:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:55,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:34:55,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:55,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150897240] [2021-11-23 02:34:55,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150897240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:55,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:55,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:34:55,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046500994] [2021-11-23 02:34:55,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:55,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:34:55,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:55,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:34:55,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:34:55,423 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) [2021-11-23 02:34:56,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:56,096 INFO L93 Difference]: Finished difference Result 17020 states and 28106 transitions. [2021-11-23 02:34:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:34:56,097 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 [2021-11-23 02:34:56,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:56,200 INFO L225 Difference]: With dead ends: 17020 [2021-11-23 02:34:56,200 INFO L226 Difference]: Without dead ends: 11473 [2021-11-23 02:34:56,227 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:34:56,228 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 43 mSDsluCounter, 239 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 [2021-11-23 02:34:56,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 437 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:34:56,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11473 states. [2021-11-23 02:34:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11473 to 11468. [2021-11-23 02:34:57,140 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) [2021-11-23 02:34:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11468 states to 11468 states and 18723 transitions. [2021-11-23 02:34:57,205 INFO L78 Accepts]: Start accepts. Automaton has 11468 states and 18723 transitions. Word has length 107 [2021-11-23 02:34:57,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:57,206 INFO L470 AbstractCegarLoop]: Abstraction has 11468 states and 18723 transitions. [2021-11-23 02:34:57,207 INFO L471 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) [2021-11-23 02:34:57,207 INFO L276 IsEmpty]: Start isEmpty. Operand 11468 states and 18723 transitions. [2021-11-23 02:34:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 02:34:57,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:57,260 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:34:57,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:34:57,261 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:57,261 INFO L85 PathProgramCache]: Analyzing trace with hash -76027321, now seen corresponding path program 1 times [2021-11-23 02:34:57,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:57,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386875926] [2021-11-23 02:34:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:57,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:34:57,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:57,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386875926] [2021-11-23 02:34:57,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386875926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:57,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:57,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:34:57,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016677970] [2021-11-23 02:34:57,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:57,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:34:57,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:34:57,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:34:57,351 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) [2021-11-23 02:34:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:58,621 INFO L93 Difference]: Finished difference Result 30339 states and 49872 transitions. [2021-11-23 02:34:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:34:58,621 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 [2021-11-23 02:34:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:58,748 INFO L225 Difference]: With dead ends: 30339 [2021-11-23 02:34:58,748 INFO L226 Difference]: Without dead ends: 20300 [2021-11-23 02:34:58,795 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:34:58,797 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 41 mSDsluCounter, 235 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 [2021-11-23 02:34:58,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 425 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:34:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20300 states. [2021-11-23 02:35:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20300 to 20295. [2021-11-23 02:35:00,252 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) [2021-11-23 02:35:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20295 states to 20295 states and 33000 transitions. [2021-11-23 02:35:00,379 INFO L78 Accepts]: Start accepts. Automaton has 20295 states and 33000 transitions. Word has length 108 [2021-11-23 02:35:00,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:00,381 INFO L470 AbstractCegarLoop]: Abstraction has 20295 states and 33000 transitions. [2021-11-23 02:35:00,382 INFO L471 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) [2021-11-23 02:35:00,382 INFO L276 IsEmpty]: Start isEmpty. Operand 20295 states and 33000 transitions. [2021-11-23 02:35:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 02:35:00,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:00,650 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:35:00,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:35:00,650 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:00,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1822981191, now seen corresponding path program 1 times [2021-11-23 02:35:00,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:00,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310042827] [2021-11-23 02:35:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:00,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:35:00,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:00,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310042827] [2021-11-23 02:35:00,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310042827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:00,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:00,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:35:00,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86011248] [2021-11-23 02:35:00,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:00,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:00,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:00,732 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) [2021-11-23 02:35:02,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:02,956 INFO L93 Difference]: Finished difference Result 55051 states and 89964 transitions. [2021-11-23 02:35:02,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:02,957 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 [2021-11-23 02:35:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:03,164 INFO L225 Difference]: With dead ends: 55051 [2021-11-23 02:35:03,164 INFO L226 Difference]: Without dead ends: 36740 [2021-11-23 02:35:03,233 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:35:03,234 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 39 mSDsluCounter, 236 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 [2021-11-23 02:35:03,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 427 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:35:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36740 states. [2021-11-23 02:35:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36740 to 36735. [2021-11-23 02:35:06,249 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) [2021-11-23 02:35:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36735 states to 36735 states and 59374 transitions. [2021-11-23 02:35:06,462 INFO L78 Accepts]: Start accepts. Automaton has 36735 states and 59374 transitions. Word has length 109 [2021-11-23 02:35:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:06,463 INFO L470 AbstractCegarLoop]: Abstraction has 36735 states and 59374 transitions. [2021-11-23 02:35:06,463 INFO L471 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) [2021-11-23 02:35:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 36735 states and 59374 transitions. [2021-11-23 02:35:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 02:35:06,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:06,551 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:35:06,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:35:06,552 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1696704793, now seen corresponding path program 1 times [2021-11-23 02:35:06,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:06,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857435877] [2021-11-23 02:35:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:06,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:35:06,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:06,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857435877] [2021-11-23 02:35:06,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857435877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:06,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:06,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:35:06,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504738165] [2021-11-23 02:35:06,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:06,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:06,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:06,662 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) [2021-11-23 02:35:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:09,846 INFO L93 Difference]: Finished difference Result 67668 states and 109545 transitions. [2021-11-23 02:35:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:09,846 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 [2021-11-23 02:35:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:10,214 INFO L225 Difference]: With dead ends: 67668 [2021-11-23 02:35:10,214 INFO L226 Difference]: Without dead ends: 67568 [2021-11-23 02:35:10,246 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:35:10,247 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 37 mSDsluCounter, 235 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 [2021-11-23 02:35:10,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 425 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:35:10,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67568 states. [2021-11-23 02:35:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67568 to 67563. [2021-11-23 02:35:14,772 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) [2021-11-23 02:35:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67563 states to 67563 states and 108328 transitions. [2021-11-23 02:35:15,111 INFO L78 Accepts]: Start accepts. Automaton has 67563 states and 108328 transitions. Word has length 110 [2021-11-23 02:35:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:15,111 INFO L470 AbstractCegarLoop]: Abstraction has 67563 states and 108328 transitions. [2021-11-23 02:35:15,112 INFO L471 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) [2021-11-23 02:35:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 67563 states and 108328 transitions. [2021-11-23 02:35:15,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 02:35:15,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:15,181 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:35:15,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:35:15,182 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:15,183 INFO L85 PathProgramCache]: Analyzing trace with hash -561093896, now seen corresponding path program 1 times [2021-11-23 02:35:15,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:15,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962791770] [2021-11-23 02:35:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:15,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:35:15,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:15,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962791770] [2021-11-23 02:35:15,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962791770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:15,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328053195] [2021-11-23 02:35:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:15,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:15,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:15,586 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:15,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:35:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:15,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-23 02:35:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:35:17,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:35:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:35:19,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328053195] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:19,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:35:19,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [18, 21] total 46 [2021-11-23 02:35:19,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002275917] [2021-11-23 02:35:19,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:19,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:35:19,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:19,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:35:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:35:19,064 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) [2021-11-23 02:35:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:28,083 INFO L93 Difference]: Finished difference Result 100737 states and 161273 transitions. [2021-11-23 02:35:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 02:35:28,083 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 [2021-11-23 02:35:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:28,626 INFO L225 Difference]: With dead ends: 100737 [2021-11-23 02:35:28,626 INFO L226 Difference]: Without dead ends: 100635 [2021-11-23 02:35:28,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=370, Invalid=3790, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 02:35:28,677 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 794 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:28,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 1950 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2137 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 02:35:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100635 states. [2021-11-23 02:35:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100635 to 100631. [2021-11-23 02:35:38,139 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) [2021-11-23 02:35:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100631 states to 100631 states and 161148 transitions. [2021-11-23 02:35:38,607 INFO L78 Accepts]: Start accepts. Automaton has 100631 states and 161148 transitions. Word has length 111 [2021-11-23 02:35:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:38,608 INFO L470 AbstractCegarLoop]: Abstraction has 100631 states and 161148 transitions. [2021-11-23 02:35:38,609 INFO L471 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) [2021-11-23 02:35:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 100631 states and 161148 transitions. [2021-11-23 02:35:38,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 02:35:38,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:38,736 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:35:38,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:38,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:35:38,951 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1783379339, now seen corresponding path program 2 times [2021-11-23 02:35:38,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:38,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798090133] [2021-11-23 02:35:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:38,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:35:39,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:39,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798090133] [2021-11-23 02:35:39,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798090133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:39,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:39,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:35:39,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747386232] [2021-11-23 02:35:39,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:39,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:39,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:39,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:39,042 INFO L87 Difference]: Start difference. First operand 100631 states and 161148 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) [2021-11-23 02:35:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:44,778 INFO L93 Difference]: Finished difference Result 132051 states and 212066 transitions. [2021-11-23 02:35:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:44,778 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 113 [2021-11-23 02:35:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:45,384 INFO L225 Difference]: With dead ends: 132051 [2021-11-23 02:35:45,385 INFO L226 Difference]: Without dead ends: 67752 [2021-11-23 02:35:45,542 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:35:45,543 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 54 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:45,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 512 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:35:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67752 states. [2021-11-23 02:35:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67752 to 67752. [2021-11-23 02:35:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67752 states, 52315 states have (on average 1.4672082576698844) internal successors, (76757), 52322 states have internal predecessors, (76757), 15376 states have call successors, (15376), 61 states have call predecessors, (15376), 60 states have return successors, (15374), 15374 states have call predecessors, (15374), 15374 states have call successors, (15374) [2021-11-23 02:35:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67752 states to 67752 states and 107507 transitions. [2021-11-23 02:35:52,071 INFO L78 Accepts]: Start accepts. Automaton has 67752 states and 107507 transitions. Word has length 113 [2021-11-23 02:35:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:52,072 INFO L470 AbstractCegarLoop]: Abstraction has 67752 states and 107507 transitions. [2021-11-23 02:35:52,072 INFO L471 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) [2021-11-23 02:35:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 67752 states and 107507 transitions. [2021-11-23 02:35:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 02:35:52,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:52,158 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:52,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:35:52,158 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:52,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1799038997, now seen corresponding path program 1 times [2021-11-23 02:35:52,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:52,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364267809] [2021-11-23 02:35:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:52,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:35:52,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:52,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364267809] [2021-11-23 02:35:52,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364267809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:52,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890190885] [2021-11-23 02:35:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:52,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:52,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:52,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:52,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8517d5b-9de8-4f2c-a262-8fe65b2e2fc3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:35:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:52,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-23 02:35:52,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:35:53,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:53,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890190885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:53,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:53,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19] total 25 [2021-11-23 02:35:53,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452275668] [2021-11-23 02:35:53,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:53,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:35:53,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:35:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:35:53,555 INFO L87 Difference]: Start difference. First operand 67752 states and 107507 transitions. Second operand has 18 states, 13 states have (on average 5.153846153846154) internal successors, (67), 14 states have internal predecessors, (67), 11 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2021-11-23 02:36:00,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:00,431 INFO L93 Difference]: Finished difference Result 68223 states and 108078 transitions. [2021-11-23 02:36:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:36:00,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 5.153846153846154) internal successors, (67), 14 states have internal predecessors, (67), 11 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 116 [2021-11-23 02:36:00,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:00,732 INFO L225 Difference]: With dead ends: 68223 [2021-11-23 02:36:00,732 INFO L226 Difference]: Without dead ends: 68037 [2021-11-23 02:36:00,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 02:36:00,763 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 431 mSDsluCounter, 2619 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:00,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 2433 Invalid, 2194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 02:36:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68037 states.