./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product05.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_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/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_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/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_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/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 74a12e124f66b10df64ef68155d31c3be83012aab827a45870f5335a6569b75a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:52:15,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:52:15,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:52:15,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:52:15,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:52:15,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:52:15,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:52:15,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:52:15,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:52:15,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:52:15,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:52:15,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:52:15,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:52:15,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:52:15,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:52:15,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:52:15,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:52:15,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:52:15,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:52:15,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:52:15,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:52:15,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:52:15,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:52:15,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:52:15,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:52:15,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:52:15,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:52:15,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:52:15,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:52:15,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:52:15,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:52:15,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:52:15,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:52:15,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:52:15,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:52:15,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:52:15,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:52:15,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:52:15,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:52:15,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:52:15,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:52:15,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:52:15,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:52:15,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:52:15,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:52:15,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:52:15,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:52:15,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:52:15,212 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:52:15,213 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:52:15,213 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:52:15,213 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:52:15,214 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:52:15,214 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:52:15,214 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:52:15,214 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:52:15,215 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:52:15,215 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:52:15,215 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:52:15,216 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:52:15,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:52:15,217 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:52:15,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:52:15,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:52:15,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:52:15,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:52:15,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:52:15,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:52:15,219 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:52:15,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:52:15,219 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:52:15,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:52:15,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:52:15,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:52:15,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:52:15,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:52:15,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:52:15,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:52:15,222 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:52:15,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:52:15,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:52:15,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:52:15,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:52:15,223 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_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74a12e124f66b10df64ef68155d31c3be83012aab827a45870f5335a6569b75a [2021-11-23 03:52:15,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:52:15,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:52:15,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:52:15,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:52:15,479 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:52:15,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c [2021-11-23 03:52:15,565 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/data/d9e5c67e5/47f92af61ccd425aba153c881342b988/FLAG20ed50d33 [2021-11-23 03:52:16,246 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:52:16,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c [2021-11-23 03:52:16,277 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/data/d9e5c67e5/47f92af61ccd425aba153c881342b988/FLAG20ed50d33 [2021-11-23 03:52:16,454 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/data/d9e5c67e5/47f92af61ccd425aba153c881342b988 [2021-11-23 03:52:16,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:52:16,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:52:16,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:52:16,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:52:16,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:52:16,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:52:16" (1/1) ... [2021-11-23 03:52:16,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a543245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:16, skipping insertion in model container [2021-11-23 03:52:16,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:52:16" (1/1) ... [2021-11-23 03:52:16,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:52:16,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:52:16,845 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_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c[4289,4302] [2021-11-23 03:52:17,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:52:17,132 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:52:17,169 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_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c[4289,4302] [2021-11-23 03:52:17,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:52:17,322 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:52:17,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17 WrapperNode [2021-11-23 03:52:17,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:52:17,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:52:17,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:52:17,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:52:17,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (1/1) ... [2021-11-23 03:52:17,403 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (1/1) ... [2021-11-23 03:52:17,456 INFO L137 Inliner]: procedures = 107, calls = 125, calls flagged for inlining = 37, calls inlined = 30, statements flattened = 580 [2021-11-23 03:52:17,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:52:17,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:52:17,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:52:17,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:52:17,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (1/1) ... [2021-11-23 03:52:17,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (1/1) ... [2021-11-23 03:52:17,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (1/1) ... [2021-11-23 03:52:17,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (1/1) ... [2021-11-23 03:52:17,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (1/1) ... [2021-11-23 03:52:17,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (1/1) ... [2021-11-23 03:52:17,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (1/1) ... [2021-11-23 03:52:17,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:52:17,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:52:17,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:52:17,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:52:17,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (1/1) ... [2021-11-23 03:52:17,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:52:17,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:17,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:52:17,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:52:17,600 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-23 03:52:17,600 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-23 03:52:17,600 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-23 03:52:17,601 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-23 03:52:17,601 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-23 03:52:17,601 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-23 03:52:17,601 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 03:52:17,601 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-23 03:52:17,601 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-23 03:52:17,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:52:17,602 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-23 03:52:17,602 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-23 03:52:17,602 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-23 03:52:17,602 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-23 03:52:17,602 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-23 03:52:17,602 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-23 03:52:17,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:52:17,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:52:17,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:52:17,758 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:52:17,760 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:52:18,339 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:52:18,481 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:52:18,481 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:52:18,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:52:18 BoogieIcfgContainer [2021-11-23 03:52:18,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:52:18,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:52:18,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:52:18,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:52:18,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:52:16" (1/3) ... [2021-11-23 03:52:18,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40168ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:52:18, skipping insertion in model container [2021-11-23 03:52:18,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:17" (2/3) ... [2021-11-23 03:52:18,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40168ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:52:18, skipping insertion in model container [2021-11-23 03:52:18,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:52:18" (3/3) ... [2021-11-23 03:52:18,492 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product05.cil.c [2021-11-23 03:52:18,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:52:18,498 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:52:18,544 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:52:18,549 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 03:52:18,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:52:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 54 states have (on average 1.537037037037037) internal successors, (83), 56 states have internal predecessors, (83), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 03:52:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 03:52:18,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:18,576 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:18,577 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash -418419106, now seen corresponding path program 1 times [2021-11-23 03:52:18,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:18,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465965644] [2021-11-23 03:52:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:18,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:52:18,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:18,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465965644] [2021-11-23 03:52:18,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465965644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:18,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:18,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:52:18,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696949416] [2021-11-23 03:52:18,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:18,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:52:18,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:52:18,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:52:18,941 INFO L87 Difference]: Start difference. First operand has 77 states, 54 states have (on average 1.537037037037037) internal successors, (83), 56 states have internal predecessors, (83), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:52:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:19,063 INFO L93 Difference]: Finished difference Result 120 states and 164 transitions. [2021-11-23 03:52:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:52:19,066 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2021-11-23 03:52:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:19,075 INFO L225 Difference]: With dead ends: 120 [2021-11-23 03:52:19,075 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 03:52:19,078 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 03:52:19,096 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:19,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 03:52:19,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-23 03:52:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 53 states have internal predecessors, (77), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 03:52:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2021-11-23 03:52:19,167 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 46 [2021-11-23 03:52:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:19,169 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2021-11-23 03:52:19,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:52:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2021-11-23 03:52:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 03:52:19,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:19,181 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:19,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:52:19,181 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835874, now seen corresponding path program 1 times [2021-11-23 03:52:19,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:19,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028379451] [2021-11-23 03:52:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:19,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:52:19,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:19,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028379451] [2021-11-23 03:52:19,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028379451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:19,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:19,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:19,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423007963] [2021-11-23 03:52:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:19,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:19,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:19,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:19,372 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:52:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:19,451 INFO L93 Difference]: Finished difference Result 116 states and 152 transitions. [2021-11-23 03:52:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:19,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2021-11-23 03:52:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:19,454 INFO L225 Difference]: With dead ends: 116 [2021-11-23 03:52:19,454 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 03:52:19,455 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 03:52:19,456 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:19,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 173 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 03:52:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-23 03:52:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.462962962962963) internal successors, (79), 55 states have internal predecessors, (79), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 03:52:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2021-11-23 03:52:19,472 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 47 [2021-11-23 03:52:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:19,473 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2021-11-23 03:52:19,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:52:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2021-11-23 03:52:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 03:52:19,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:19,476 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:19,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:52:19,477 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:19,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1043327300, now seen corresponding path program 1 times [2021-11-23 03:52:19,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:19,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462726738] [2021-11-23 03:52:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:19,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:52:19,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462726738] [2021-11-23 03:52:19,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462726738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:52:19,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747465546] [2021-11-23 03:52:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:19,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:19,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:19,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:52:19,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:52:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:19,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:52:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:52:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:52:20,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:52:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:52:20,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747465546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:52:20,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1203975250] [2021-11-23 03:52:20,259 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2021-11-23 03:52:20,259 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:52:20,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:52:20,278 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:52:20,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:52:29,162 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 03:52:29,514 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:52:50,024 WARN L227 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 564 DAG size of output: 309 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:56,278 WARN L227 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 566 DAG size of output: 312 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:53:01,635 WARN L227 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 558 DAG size of output: 343 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:53:01,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1203975250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:53:01,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:53:01,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 4, 4] total 19 [2021-11-23 03:53:01,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410614230] [2021-11-23 03:53:01,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:53:01,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:53:01,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:01,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:53:01,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:53:01,930 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 14 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-23 03:53:04,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:04,577 INFO L93 Difference]: Finished difference Result 214 states and 341 transitions. [2021-11-23 03:53:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:53:04,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 51 [2021-11-23 03:53:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:04,582 INFO L225 Difference]: With dead ends: 214 [2021-11-23 03:53:04,582 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 03:53:04,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:53:04,585 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 99 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:04,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 994 Invalid, 670 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 03:53:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 03:53:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2021-11-23 03:53:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.48) internal successors, (111), 76 states have internal predecessors, (111), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 03:53:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 138 transitions. [2021-11-23 03:53:04,627 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 138 transitions. Word has length 51 [2021-11-23 03:53:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:04,627 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 138 transitions. [2021-11-23 03:53:04,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-23 03:53:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 138 transitions. [2021-11-23 03:53:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 03:53:04,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:04,630 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:04,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:53:04,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:04,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:04,856 INFO L85 PathProgramCache]: Analyzing trace with hash -832994549, now seen corresponding path program 1 times [2021-11-23 03:53:04,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:04,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865474501] [2021-11-23 03:53:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:04,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:53:04,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865474501] [2021-11-23 03:53:04,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865474501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:53:04,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:53:04,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:53:04,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725305199] [2021-11-23 03:53:04,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:53:04,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:53:04,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:04,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:53:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:53:04,921 INFO L87 Difference]: Start difference. First operand 97 states and 138 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:53:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:05,014 INFO L93 Difference]: Finished difference Result 230 states and 341 transitions. [2021-11-23 03:53:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:53:05,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2021-11-23 03:53:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:05,016 INFO L225 Difference]: With dead ends: 230 [2021-11-23 03:53:05,016 INFO L226 Difference]: Without dead ends: 147 [2021-11-23 03:53:05,018 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 03:53:05,019 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 46 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:05,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 170 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:53:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-23 03:53:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-11-23 03:53:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 120 states have (on average 1.55) internal successors, (186), 121 states have internal predecessors, (186), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 03:53:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 213 transitions. [2021-11-23 03:53:05,114 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 213 transitions. Word has length 52 [2021-11-23 03:53:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:05,115 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 213 transitions. [2021-11-23 03:53:05,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:53:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 213 transitions. [2021-11-23 03:53:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 03:53:05,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:05,118 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:05,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:53:05,118 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:05,119 INFO L85 PathProgramCache]: Analyzing trace with hash 71777151, now seen corresponding path program 1 times [2021-11-23 03:53:05,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:05,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989282136] [2021-11-23 03:53:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:05,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:53:05,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:05,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989282136] [2021-11-23 03:53:05,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989282136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:53:05,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261544245] [2021-11-23 03:53:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:05,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:05,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:05,191 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:05,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:53:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:53:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:53:05,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:53:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:53:05,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261544245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:53:05,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275209679] [2021-11-23 03:53:05,627 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-23 03:53:05,627 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:53:05,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:53:05,628 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:53:05,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:53:13,197 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 03:53:13,457 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:53:35,118 WARN L227 SmtUtils]: Spent 7.91s on a formula simplification. DAG size of input: 566 DAG size of output: 327 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:53:41,238 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 568 DAG size of output: 313 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:53:48,161 WARN L227 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 568 DAG size of output: 325 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:53:55,074 WARN L227 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 566 DAG size of output: 323 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:54:00,469 WARN L227 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 558 DAG size of output: 345 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:54:00,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [275209679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:00,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:54:00,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 21 [2021-11-23 03:54:00,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844609018] [2021-11-23 03:54:00,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:00,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:54:00,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:00,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:54:00,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:54:00,777 INFO L87 Difference]: Start difference. First operand 142 states and 213 transitions. Second operand has 16 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-23 03:54:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:03,028 INFO L93 Difference]: Finished difference Result 344 states and 561 transitions. [2021-11-23 03:54:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:54:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 53 [2021-11-23 03:54:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:03,031 INFO L225 Difference]: With dead ends: 344 [2021-11-23 03:54:03,031 INFO L226 Difference]: Without dead ends: 257 [2021-11-23 03:54:03,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:54:03,033 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 157 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:03,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 838 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 03:54:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-23 03:54:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 150. [2021-11-23 03:54:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 128 states have (on average 1.546875) internal successors, (198), 129 states have internal predecessors, (198), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 03:54:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 225 transitions. [2021-11-23 03:54:03,105 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 225 transitions. Word has length 53 [2021-11-23 03:54:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:03,106 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 225 transitions. [2021-11-23 03:54:03,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-23 03:54:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 225 transitions. [2021-11-23 03:54:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 03:54:03,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:03,108 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:03,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 03:54:03,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:03,314 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:03,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:03,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1366890874, now seen corresponding path program 1 times [2021-11-23 03:54:03,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:03,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36825684] [2021-11-23 03:54:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:03,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:54:03,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:03,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36825684] [2021-11-23 03:54:03,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36825684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:54:03,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132118708] [2021-11-23 03:54:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:03,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:03,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:03,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:03,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:54:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:03,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:54:03,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:54:03,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:54:03,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132118708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:54:03,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [135515022] [2021-11-23 03:54:03,814 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2021-11-23 03:54:03,815 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:54:03,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:54:03,815 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:54:03,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:54:12,110 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 452 for LOIs [2021-11-23 03:54:12,427 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:54:26,953 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 475 DAG size of output: 277 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:54:38,940 WARN L227 SmtUtils]: Spent 8.65s on a formula simplification. DAG size of input: 568 DAG size of output: 403 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:54:47,501 WARN L227 SmtUtils]: Spent 7.93s on a formula simplification. DAG size of input: 570 DAG size of output: 422 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:54:55,129 WARN L227 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 570 DAG size of output: 339 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:02,757 WARN L227 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 568 DAG size of output: 337 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:08,899 WARN L227 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 568 DAG size of output: 319 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:15,027 WARN L227 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 566 DAG size of output: 317 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:20,539 WARN L227 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 558 DAG size of output: 347 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:20,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [135515022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:55:20,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:55:20,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [4, 4, 4] total 23 [2021-11-23 03:55:20,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548362675] [2021-11-23 03:55:20,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:55:20,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:55:20,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:20,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:55:20,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:55:20,862 INFO L87 Difference]: Start difference. First operand 150 states and 225 transitions. Second operand has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-23 03:55:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:23,164 INFO L93 Difference]: Finished difference Result 348 states and 566 transitions. [2021-11-23 03:55:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:55:23,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-11-23 03:55:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:23,167 INFO L225 Difference]: With dead ends: 348 [2021-11-23 03:55:23,168 INFO L226 Difference]: Without dead ends: 261 [2021-11-23 03:55:23,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 68.4s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:55:23,169 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 108 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:23,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 772 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 03:55:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-23 03:55:23,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 160. [2021-11-23 03:55:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 138 states have (on average 1.5434782608695652) internal successors, (213), 139 states have internal predecessors, (213), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 03:55:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 240 transitions. [2021-11-23 03:55:23,244 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 240 transitions. Word has length 55 [2021-11-23 03:55:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:23,245 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 240 transitions. [2021-11-23 03:55:23,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-23 03:55:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 240 transitions. [2021-11-23 03:55:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 03:55:23,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:23,247 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:23,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:23,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:55:23,461 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:23,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:23,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1757041449, now seen corresponding path program 1 times [2021-11-23 03:55:23,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:23,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616160526] [2021-11-23 03:55:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:23,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:55:23,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:23,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616160526] [2021-11-23 03:55:23,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616160526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:23,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119148123] [2021-11-23 03:55:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:23,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:23,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:23,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:23,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:55:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:23,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:55:23,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:55:23,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:55:24,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119148123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:24,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742175376] [2021-11-23 03:55:24,014 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-23 03:55:24,014 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:24,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:24,015 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:24,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:33,269 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 03:55:33,534 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 246 for LOIs [2021-11-23 03:55:34,960 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 248 for LOIs [2021-11-23 03:55:37,079 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 239 for LOIs [2021-11-23 03:55:37,120 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 481 for LOIs [2021-11-23 03:55:38,803 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 236 for LOIs [2021-11-23 03:55:38,843 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:56:06,588 WARN L227 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 481 DAG size of output: 248 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:56:30,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1742175376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:30,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:56:30,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [6, 5, 5] total 42 [2021-11-23 03:56:30,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869256809] [2021-11-23 03:56:30,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:30,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 03:56:30,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 03:56:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 03:56:30,113 INFO L87 Difference]: Start difference. First operand 160 states and 240 transitions. Second operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-23 03:56:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:37,757 INFO L93 Difference]: Finished difference Result 420 states and 673 transitions. [2021-11-23 03:56:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 03:56:37,758 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 56 [2021-11-23 03:56:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:37,761 INFO L225 Difference]: With dead ends: 420 [2021-11-23 03:56:37,761 INFO L226 Difference]: Without dead ends: 291 [2021-11-23 03:56:37,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 03:56:37,764 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 231 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 2370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:37,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1995 Invalid, 2370 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 03:56:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-23 03:56:37,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 229. [2021-11-23 03:56:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 197 states have (on average 1.598984771573604) internal successors, (315), 199 states have internal predecessors, (315), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-23 03:56:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 354 transitions. [2021-11-23 03:56:37,919 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 354 transitions. Word has length 56 [2021-11-23 03:56:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:37,920 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 354 transitions. [2021-11-23 03:56:37,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-23 03:56:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 354 transitions. [2021-11-23 03:56:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 03:56:37,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:37,922 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:37,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:56:38,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:56:38,137 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash 48270293, now seen corresponding path program 1 times [2021-11-23 03:56:38,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:38,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077869084] [2021-11-23 03:56:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:38,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:56:38,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:38,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077869084] [2021-11-23 03:56:38,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077869084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:56:38,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262254352] [2021-11-23 03:56:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:38,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:56:38,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:56:38,221 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:56:38,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:56:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:38,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:56:38,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:56:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:56:38,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:56:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:56:38,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262254352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:56:38,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249982817] [2021-11-23 03:56:38,707 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-23 03:56:38,707 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:56:38,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:56:38,709 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:56:38,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:56:58,051 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 03:56:58,318 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 460 for LOIs [2021-11-23 03:56:59,721 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 248 for LOIs [2021-11-23 03:57:08,362 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 242 for LOIs [2021-11-23 03:57:08,399 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 241 for LOIs [2021-11-23 03:57:08,443 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 477 for LOIs [2021-11-23 03:57:09,945 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 452 for LOIs [2021-11-23 03:57:10,500 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:57:57,409 WARN L227 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 559 DAG size of output: 339 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:03,166 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 557 DAG size of output: 337 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:19,552 WARN L227 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 555 DAG size of output: 385 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:27,163 WARN L227 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 553 DAG size of output: 383 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:33,770 WARN L227 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 553 DAG size of output: 353 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:53,554 WARN L227 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 477 DAG size of output: 250 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:59:41,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1249982817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:41,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:59:41,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [4, 4, 4] total 54 [2021-11-23 03:59:41,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232693349] [2021-11-23 03:59:41,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:41,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 03:59:41,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:59:41,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 03:59:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2645, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 03:59:41,062 INFO L87 Difference]: Start difference. First operand 229 states and 354 transitions. Second operand has 49 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 32 states have internal predecessors, (36), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 04:00:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:00:20,124 INFO L93 Difference]: Finished difference Result 406 states and 632 transitions. [2021-11-23 04:00:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-23 04:00:20,125 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 32 states have internal predecessors, (36), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 61 [2021-11-23 04:00:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:00:20,128 INFO L225 Difference]: With dead ends: 406 [2021-11-23 04:00:20,128 INFO L226 Difference]: Without dead ends: 319 [2021-11-23 04:00:20,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 183.7s TimeCoverageRelationStatistics Valid=440, Invalid=4116, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 04:00:20,131 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 310 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 04:00:20,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1212 Invalid, 2498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 04:00:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-23 04:00:20,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 288. [2021-11-23 04:00:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 243 states have (on average 1.559670781893004) internal successors, (379), 246 states have internal predecessors, (379), 28 states have call successors, (28), 18 states have call predecessors, (28), 16 states have return successors, (28), 23 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-23 04:00:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 435 transitions. [2021-11-23 04:00:20,271 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 435 transitions. Word has length 61 [2021-11-23 04:00:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:00:20,272 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 435 transitions. [2021-11-23 04:00:20,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 32 states have internal predecessors, (36), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 04:00:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 435 transitions. [2021-11-23 04:00:20,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 04:00:20,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:00:20,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 04:00:20,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 04:00:20,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:00:20,475 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:00:20,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:00:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash -541173377, now seen corresponding path program 1 times [2021-11-23 04:00:20,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:00:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023749619] [2021-11-23 04:00:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:20,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:00:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 04:00:20,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:00:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023749619] [2021-11-23 04:00:20,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023749619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 04:00:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952852515] [2021-11-23 04:00:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:20,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:00:20,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:00:20,566 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:00:20,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6b98ae-44a3-4ebb-9173-1fb8a6a50da4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 04:00:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:20,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 04:00:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:00:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 04:00:20,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:00:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 04:00:21,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952852515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:00:21,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [796580556] [2021-11-23 04:00:21,050 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-23 04:00:21,050 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 04:00:21,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 04:00:21,051 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 04:00:21,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 04:00:41,166 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 04:00:41,426 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 464 for LOIs [2021-11-23 04:00:58,547 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 462 for LOIs [2021-11-23 04:01:09,520 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 242 for LOIs [2021-11-23 04:01:09,556 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 241 for LOIs [2021-11-23 04:01:09,598 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 455 for LOIs [2021-11-23 04:01:10,195 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 445 for LOIs [2021-11-23 04:01:10,791 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 04:01:30,515 WARN L227 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 551 DAG size of output: 352 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:01:36,197 WARN L227 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 553 DAG size of output: 354 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:01:41,547 WARN L227 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 552 DAG size of output: 344 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:01:47,523 WARN L227 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 555 DAG size of output: 356 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:01:53,814 WARN L227 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 557 DAG size of output: 379 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:02:00,016 WARN L227 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 555 DAG size of output: 377 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:02:24,457 WARN L227 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 557 DAG size of output: 421 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:02:31,845 WARN L227 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 555 DAG size of output: 419 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:02:39,358 WARN L227 SmtUtils]: Spent 6.88s on a formula simplification. DAG size of input: 559 DAG size of output: 423 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:02:44,910 WARN L227 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 552 DAG size of output: 353 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:03:02,619 WARN L227 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 506 DAG size of output: 333 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)