./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 ceaa95778492e3bc285d343b26b58125dae05b4d97d6b8fbdf100b65fa491c48 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:47:34,348 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:47:34,415 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:47:34,420 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:47:34,421 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:47:34,445 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:47:34,446 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:47:34,446 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:47:34,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:47:34,448 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:47:34,448 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:47:34,449 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:47:34,449 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:47:34,450 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:47:34,450 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:47:34,451 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:47:34,451 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:47:34,452 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:47:34,452 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:47:34,453 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:47:34,453 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:47:34,457 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:47:34,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:47:34,458 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:47:34,459 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:47:34,459 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:47:34,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:47:34,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:47:34,460 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:47:34,460 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:47:34,461 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:47:34,461 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:47:34,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:47:34,462 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:47:34,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:47:34,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:47:34,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:47:34,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:47:34,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:47:34,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:47:34,463 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:47:34,464 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:47:34,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:47:34,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:47:34,464 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:47:34,465 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:47:34,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:47:34,465 INFO L153 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_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceaa95778492e3bc285d343b26b58125dae05b4d97d6b8fbdf100b65fa491c48 [2023-12-02 16:47:34,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:47:34,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:47:34,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:47:34,708 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:47:34,708 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:47:34,709 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/email_spec11_product03.cil.c [2023-12-02 16:47:37,474 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:47:37,732 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:47:37,733 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/sv-benchmarks/c/product-lines/email_spec11_product03.cil.c [2023-12-02 16:47:37,752 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/data/859d89976/8a4faa9b7e6f4651b27d503625e10029/FLAG51a7305ae [2023-12-02 16:47:37,765 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/data/859d89976/8a4faa9b7e6f4651b27d503625e10029 [2023-12-02 16:47:37,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:47:37,769 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:47:37,771 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:47:37,771 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:47:37,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:47:37,776 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:47:37" (1/1) ... [2023-12-02 16:47:37,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f5f9b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:37, skipping insertion in model container [2023-12-02 16:47:37,778 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:47:37" (1/1) ... [2023-12-02 16:47:37,841 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:47:38,138 WARN L240 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_59de0e77-4266-4fba-b36d-f11c007e806c/sv-benchmarks/c/product-lines/email_spec11_product03.cil.c[19915,19928] [2023-12-02 16:47:38,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:47:38,265 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:47:38,274 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2023-12-02 16:47:38,276 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [202] [2023-12-02 16:47:38,276 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [394] [2023-12-02 16:47:38,277 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"EmailLib.i","") [429] [2023-12-02 16:47:38,277 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Client.i","") [841] [2023-12-02 16:47:38,277 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"DecryptAutoResponder_spec.i","") [1003] [2023-12-02 16:47:38,277 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1024] [2023-12-02 16:47:38,277 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Util.i","") [1033] [2023-12-02 16:47:38,278 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1050] [2023-12-02 16:47:38,278 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"ClientLib.i","") [1416] [2023-12-02 16:47:38,278 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Email.i","") [2491] [2023-12-02 16:47:38,310 WARN L240 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_59de0e77-4266-4fba-b36d-f11c007e806c/sv-benchmarks/c/product-lines/email_spec11_product03.cil.c[19915,19928] [2023-12-02 16:47:38,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:47:38,386 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:38,394 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:47:38,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38 WrapperNode [2023-12-02 16:47:38,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:47:38,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:47:38,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:47:38,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:47:38,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,465 INFO L138 Inliner]: procedures = 107, calls = 125, calls flagged for inlining = 35, calls inlined = 27, statements flattened = 544 [2023-12-02 16:47:38,466 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:47:38,467 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:47:38,467 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:47:38,467 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:47:38,477 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,483 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,496 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,502 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,517 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,526 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:47:38,527 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:47:38,527 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:47:38,528 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:47:38,528 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (1/1) ... [2023-12-02 16:47:38,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:47:38,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:47:38,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:47:38,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:47:38,595 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2023-12-02 16:47:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2023-12-02 16:47:38,596 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2023-12-02 16:47:38,596 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2023-12-02 16:47:38,596 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2023-12-02 16:47:38,596 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2023-12-02 16:47:38,596 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2023-12-02 16:47:38,597 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2023-12-02 16:47:38,597 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2023-12-02 16:47:38,597 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2023-12-02 16:47:38,597 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2023-12-02 16:47:38,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:47:38,597 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2023-12-02 16:47:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2023-12-02 16:47:38,598 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2023-12-02 16:47:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2023-12-02 16:47:38,598 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2023-12-02 16:47:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2023-12-02 16:47:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:47:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:47:38,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:47:38,756 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:47:38,758 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:47:39,144 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:47:39,291 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:47:39,292 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:47:39,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:47:39 BoogieIcfgContainer [2023-12-02 16:47:39,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:47:39,296 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:47:39,296 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:47:39,299 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:47:39,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:47:37" (1/3) ... [2023-12-02 16:47:39,300 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301c3977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:47:39, skipping insertion in model container [2023-12-02 16:47:39,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:38" (2/3) ... [2023-12-02 16:47:39,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301c3977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:47:39, skipping insertion in model container [2023-12-02 16:47:39,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:47:39" (3/3) ... [2023-12-02 16:47:39,302 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec11_product03.cil.c [2023-12-02 16:47:39,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:47:39,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:47:39,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:47:39,376 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@131f27e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:47:39,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:47:39,381 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), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-02 16:47:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 16:47:39,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:39,392 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 16:47:39,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:39,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:39,398 INFO L85 PathProgramCache]: Analyzing trace with hash -427663665, now seen corresponding path program 1 times [2023-12-02 16:47:39,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:39,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197847085] [2023-12-02 16:47:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:39,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:47:39,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:39,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197847085] [2023-12-02 16:47:39,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197847085] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:39,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:39,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:47:39,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128002489] [2023-12-02 16:47:39,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:39,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 16:47:39,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 16:47:39,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:47:39,746 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), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:47:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:39,810 INFO L93 Difference]: Finished difference Result 120 states and 160 transitions. [2023-12-02 16:47:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 16:47:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 42 [2023-12-02 16:47:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:39,821 INFO L225 Difference]: With dead ends: 120 [2023-12-02 16:47:39,821 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 16:47:39,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:47:39,828 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:47:39,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:47:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 16:47:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-12-02 16:47:39,866 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), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 16:47:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2023-12-02 16:47:39,870 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 42 [2023-12-02 16:47:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:39,872 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2023-12-02 16:47:39,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:47:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2023-12-02 16:47:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 16:47:39,875 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:39,875 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 16:47:39,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:47:39,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:39,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1690047142, now seen corresponding path program 1 times [2023-12-02 16:47:39,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:39,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327736022] [2023-12-02 16:47:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:47:40,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:40,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327736022] [2023-12-02 16:47:40,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327736022] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:40,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:40,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:47:40,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486017908] [2023-12-02 16:47:40,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:40,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:47:40,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:40,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:47:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:47:40,046 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:47:40,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:40,100 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2023-12-02 16:47:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:47:40,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 43 [2023-12-02 16:47:40,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:40,103 INFO L225 Difference]: With dead ends: 116 [2023-12-02 16:47:40,103 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 16:47:40,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:47:40,105 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:47:40,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:47:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 16:47:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-12-02 16:47:40,116 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), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 16:47:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 104 transitions. [2023-12-02 16:47:40,118 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 104 transitions. Word has length 43 [2023-12-02 16:47:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:40,118 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 104 transitions. [2023-12-02 16:47:40,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:47:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 104 transitions. [2023-12-02 16:47:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 16:47:40,121 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:40,121 INFO L195 NwaCegarLoop]: 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] [2023-12-02 16:47:40,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:47:40,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:40,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:40,122 INFO L85 PathProgramCache]: Analyzing trace with hash 208276200, now seen corresponding path program 1 times [2023-12-02 16:47:40,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:40,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118669783] [2023-12-02 16:47:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:40,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:47:40,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:40,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118669783] [2023-12-02 16:47:40,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118669783] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:47:40,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172577107] [2023-12-02 16:47:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:40,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:47:40,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:47:40,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:47:40,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:47:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:40,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:47:40,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:47:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:47:40,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:47:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:47:40,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172577107] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:47:40,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763985706] [2023-12-02 16:47:40,693 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-12-02 16:47:40,693 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:47:40,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:47:40,702 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:47:40,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:47:57,919 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 232 for LOIs [2023-12-02 16:47:58,090 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:48:24,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1763985706] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:48:24,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:48:24,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 4, 4] total 19 [2023-12-02 16:48:24,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185712661] [2023-12-02 16:48:24,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:48:24,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 16:48:24,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:48:24,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 16:48:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:48:24,553 INFO L87 Difference]: Start difference. First operand 76 states and 104 transitions. Second operand has 14 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:48:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:48:27,470 INFO L93 Difference]: Finished difference Result 188 states and 287 transitions. [2023-12-02 16:48:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:48:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 47 [2023-12-02 16:48:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:48:27,474 INFO L225 Difference]: With dead ends: 188 [2023-12-02 16:48:27,474 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 16:48:27,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:48:27,477 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 44 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:48:27,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1125 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 16:48:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 16:48:27,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2023-12-02 16:48:27,504 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), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 16:48:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2023-12-02 16:48:27,506 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 47 [2023-12-02 16:48:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:48:27,506 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2023-12-02 16:48:27,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:48:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2023-12-02 16:48:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 16:48:27,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:48:27,509 INFO L195 NwaCegarLoop]: 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, 1] [2023-12-02 16:48:27,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:48:27,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:48:27,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:48:27,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:48:27,710 INFO L85 PathProgramCache]: Analyzing trace with hash 700307726, now seen corresponding path program 1 times [2023-12-02 16:48:27,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:48:27,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254485601] [2023-12-02 16:48:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:48:27,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:48:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:48:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:48:27,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:48:27,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254485601] [2023-12-02 16:48:27,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254485601] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:48:27,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:48:27,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:48:27,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572623712] [2023-12-02 16:48:27,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:48:27,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:48:27,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:48:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:48:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:48:27,786 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:48:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:48:27,854 INFO L93 Difference]: Finished difference Result 230 states and 337 transitions. [2023-12-02 16:48:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:48:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-12-02 16:48:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:48:27,856 INFO L225 Difference]: With dead ends: 230 [2023-12-02 16:48:27,856 INFO L226 Difference]: Without dead ends: 147 [2023-12-02 16:48:27,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:48:27,858 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 46 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 165 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 [2023-12-02 16:48:27,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 165 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:48:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-12-02 16:48:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2023-12-02 16:48:27,890 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), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 16:48:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 211 transitions. [2023-12-02 16:48:27,892 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 211 transitions. Word has length 48 [2023-12-02 16:48:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:48:27,893 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 211 transitions. [2023-12-02 16:48:27,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:48:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 211 transitions. [2023-12-02 16:48:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 16:48:27,895 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:48:27,895 INFO L195 NwaCegarLoop]: 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, 1, 1] [2023-12-02 16:48:27,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:48:27,896 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:48:27,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:48:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2043985614, now seen corresponding path program 1 times [2023-12-02 16:48:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:48:27,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133264860] [2023-12-02 16:48:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:48:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:48:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:48:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:48:28,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:48:28,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133264860] [2023-12-02 16:48:28,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133264860] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:48:28,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215016341] [2023-12-02 16:48:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:48:28,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:48:28,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:48:28,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:48:28,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:48:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:48:28,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:48:28,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:48:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:48:28,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:48:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:48:28,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215016341] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:48:28,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909846866] [2023-12-02 16:48:28,298 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-12-02 16:48:28,299 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:48:28,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:48:28,299 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:48:28,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:48:47,125 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 232 for LOIs [2023-12-02 16:48:47,298 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:49:18,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [909846866] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:49:18,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:49:18,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 21 [2023-12-02 16:49:18,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862346863] [2023-12-02 16:49:18,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:49:18,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 16:49:18,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:49:18,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 16:49:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-12-02 16:49:18,594 INFO L87 Difference]: Start difference. First operand 142 states and 211 transitions. Second operand has 16 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:49:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:49:21,047 INFO L93 Difference]: Finished difference Result 295 states and 463 transitions. [2023-12-02 16:49:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 16:49:21,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2023-12-02 16:49:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:49:21,050 INFO L225 Difference]: With dead ends: 295 [2023-12-02 16:49:21,050 INFO L226 Difference]: Without dead ends: 208 [2023-12-02 16:49:21,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-12-02 16:49:21,052 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 80 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:49:21,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 785 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 16:49:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-12-02 16:49:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 150. [2023-12-02 16:49:21,081 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), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 16:49:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 223 transitions. [2023-12-02 16:49:21,082 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 223 transitions. Word has length 49 [2023-12-02 16:49:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:49:21,083 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 223 transitions. [2023-12-02 16:49:21,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:49:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 223 transitions. [2023-12-02 16:49:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 16:49:21,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:49:21,085 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1] [2023-12-02 16:49:21,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:49:21,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:49:21,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:49:21,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:49:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash -145464054, now seen corresponding path program 1 times [2023-12-02 16:49:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:49:21,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615496483] [2023-12-02 16:49:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:49:21,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:49:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:49:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:49:21,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:49:21,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615496483] [2023-12-02 16:49:21,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615496483] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:49:21,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955167213] [2023-12-02 16:49:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:49:21,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:49:21,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:49:21,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:49:21,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:49:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:49:21,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:49:21,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:49:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:49:21,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:49:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:49:21,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955167213] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:49:21,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071664857] [2023-12-02 16:49:21,660 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-12-02 16:49:21,661 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:49:21,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:49:21,661 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:49:21,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:49:42,980 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 232 for LOIs [2023-12-02 16:49:43,189 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:50:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2071664857] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:50:19,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:50:19,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [4, 4, 4] total 23 [2023-12-02 16:50:19,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052886736] [2023-12-02 16:50:19,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:50:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 16:50:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:50:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 16:50:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-12-02 16:50:19,968 INFO L87 Difference]: Start difference. First operand 150 states and 223 transitions. Second operand has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:50:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:50:22,694 INFO L93 Difference]: Finished difference Result 299 states and 468 transitions. [2023-12-02 16:50:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 16:50:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2023-12-02 16:50:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:50:22,696 INFO L225 Difference]: With dead ends: 299 [2023-12-02 16:50:22,696 INFO L226 Difference]: Without dead ends: 212 [2023-12-02 16:50:22,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-12-02 16:50:22,698 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 108 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:50:22,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 770 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 16:50:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-12-02 16:50:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2023-12-02 16:50:22,722 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), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 16:50:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2023-12-02 16:50:22,723 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 51 [2023-12-02 16:50:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:50:22,723 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2023-12-02 16:50:22,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:50:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2023-12-02 16:50:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 16:50:22,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:50:22,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:50:22,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:50:22,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:50:22,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:50:22,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:50:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash -281934784, now seen corresponding path program 1 times [2023-12-02 16:50:22,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:50:22,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684665645] [2023-12-02 16:50:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:50:22,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:50:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:50:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:50:23,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:50:23,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684665645] [2023-12-02 16:50:23,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684665645] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:50:23,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823821295] [2023-12-02 16:50:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:50:23,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:50:23,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:50:23,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:50:23,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:50:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:50:23,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:50:23,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:50:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:50:23,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:50:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:50:23,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823821295] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:50:23,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [16206212] [2023-12-02 16:50:23,385 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-12-02 16:50:23,386 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:50:23,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:50:23,386 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:50:23,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:50:42,275 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 232 for LOIs [2023-12-02 16:50:42,448 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 241 for LOIs [2023-12-02 16:50:45,765 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 229 for LOIs [2023-12-02 16:50:45,893 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 239 for LOIs [2023-12-02 16:50:51,013 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 233 for LOIs [2023-12-02 16:50:51,141 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 230 for LOIs [2023-12-02 16:50:51,294 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 248 for LOIs [2023-12-02 16:50:52,537 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:51:53,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [16206212] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:51:53,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:51:53,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [6, 5, 5] total 47 [2023-12-02 16:51:53,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695332309] [2023-12-02 16:51:53,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:51:53,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-02 16:51:53,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:51:53,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-02 16:51:53,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 16:51:53,960 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand has 39 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 16:52:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:52:02,701 INFO L93 Difference]: Finished difference Result 380 states and 582 transitions. [2023-12-02 16:52:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 16:52:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 52 [2023-12-02 16:52:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:52:02,704 INFO L225 Difference]: With dead ends: 380 [2023-12-02 16:52:02,704 INFO L226 Difference]: Without dead ends: 251 [2023-12-02 16:52:02,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=140, Invalid=2116, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 16:52:02,706 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 96 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 2749 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:52:02,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1674 Invalid, 2770 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [21 Valid, 2749 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-12-02 16:52:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-12-02 16:52:02,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 205. [2023-12-02 16:52:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 171 states have (on average 1.4970760233918128) internal successors, (256), 173 states have internal predecessors, (256), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (20), 17 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 16:52:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 296 transitions. [2023-12-02 16:52:02,750 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 296 transitions. Word has length 52 [2023-12-02 16:52:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:52:02,750 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 296 transitions. [2023-12-02 16:52:02,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 16:52:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 296 transitions. [2023-12-02 16:52:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 16:52:02,751 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:52:02,751 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2023-12-02 16:52:02,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:52:02,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:52:02,952 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:52:02,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:52:02,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1567916229, now seen corresponding path program 1 times [2023-12-02 16:52:02,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:52:02,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134185864] [2023-12-02 16:52:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:52:02,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:52:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:52:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:52:03,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:52:03,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134185864] [2023-12-02 16:52:03,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134185864] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:52:03,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642787203] [2023-12-02 16:52:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:52:03,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:52:03,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:52:03,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:52:03,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:52:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:52:03,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:52:03,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:52:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:52:03,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:52:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:52:03,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642787203] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:52:03,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150188038] [2023-12-02 16:52:03,287 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-12-02 16:52:03,287 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:52:03,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:52:03,288 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:52:03,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:52:28,596 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 232 for LOIs [2023-12-02 16:52:28,759 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:53:11,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [150188038] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:53:11,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:53:11,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [4, 4, 4] total 25 [2023-12-02 16:53:11,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826935012] [2023-12-02 16:53:11,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:53:11,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 16:53:11,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:53:11,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 16:53:11,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-12-02 16:53:11,082 INFO L87 Difference]: Start difference. First operand 205 states and 296 transitions. Second operand has 20 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:53:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:53:14,412 INFO L93 Difference]: Finished difference Result 352 states and 537 transitions. [2023-12-02 16:53:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 16:53:14,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2023-12-02 16:53:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:53:14,414 INFO L225 Difference]: With dead ends: 352 [2023-12-02 16:53:14,414 INFO L226 Difference]: Without dead ends: 265 [2023-12-02 16:53:14,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-12-02 16:53:14,415 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 96 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:53:14,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 767 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 16:53:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-12-02 16:53:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 217. [2023-12-02 16:53:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 183 states have (on average 1.4972677595628416) internal successors, (274), 185 states have internal predecessors, (274), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (20), 17 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 16:53:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 314 transitions. [2023-12-02 16:53:14,462 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 314 transitions. Word has length 53 [2023-12-02 16:53:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:53:14,462 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 314 transitions. [2023-12-02 16:53:14,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:53:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 314 transitions. [2023-12-02 16:53:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 16:53:14,463 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:53:14,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:53:14,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:53:14,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:53:14,664 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:53:14,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:53:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash 968268952, now seen corresponding path program 1 times [2023-12-02 16:53:14,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:53:14,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479625169] [2023-12-02 16:53:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:53:14,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:53:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:53:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:53:14,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:53:14,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479625169] [2023-12-02 16:53:14,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479625169] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:53:14,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159164461] [2023-12-02 16:53:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:53:14,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:53:14,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:53:14,780 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:53:14,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:53:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:53:14,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:53:14,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:53:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:53:15,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:53:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:53:15,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159164461] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:53:15,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1203777408] [2023-12-02 16:53:15,086 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-12-02 16:53:15,086 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:53:15,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:53:15,087 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:53:15,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:53:36,849 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 232 for LOIs [2023-12-02 16:53:37,013 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 241 for LOIs [2023-12-02 16:53:40,318 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 229 for LOIs [2023-12-02 16:53:40,479 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 239 for LOIs [2023-12-02 16:53:44,075 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 230 for LOIs [2023-12-02 16:53:44,225 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 248 for LOIs [2023-12-02 16:53:45,473 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:54:43,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1203777408] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:54:43,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:54:43,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [6, 5, 5] total 44 [2023-12-02 16:54:43,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902959320] [2023-12-02 16:54:43,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:54:43,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 16:54:43,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:54:43,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 16:54:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 16:54:43,119 INFO L87 Difference]: Start difference. First operand 217 states and 314 transitions. Second operand has 36 states, 24 states have (on average 1.25) internal successors, (30), 22 states have internal predecessors, (30), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 16:54:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:54:53,637 INFO L93 Difference]: Finished difference Result 451 states and 680 transitions. [2023-12-02 16:54:53,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-02 16:54:53,638 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 1.25) internal successors, (30), 22 states have internal predecessors, (30), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 54 [2023-12-02 16:54:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:54:53,642 INFO L225 Difference]: With dead ends: 451 [2023-12-02 16:54:53,642 INFO L226 Difference]: Without dead ends: 359 [2023-12-02 16:54:53,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=140, Invalid=1930, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 16:54:53,644 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 94 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 2809 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:54:53,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 2147 Invalid, 2834 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 2809 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-12-02 16:54:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-12-02 16:54:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 277. [2023-12-02 16:54:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 233 states have (on average 1.4763948497854078) internal successors, (344), 236 states have internal predecessors, (344), 26 states have call successors, (26), 19 states have call predecessors, (26), 17 states have return successors, (26), 21 states have call predecessors, (26), 25 states have call successors, (26) [2023-12-02 16:54:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 396 transitions. [2023-12-02 16:54:53,729 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 396 transitions. Word has length 54 [2023-12-02 16:54:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:54:53,729 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 396 transitions. [2023-12-02 16:54:53,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 1.25) internal successors, (30), 22 states have internal predecessors, (30), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 16:54:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 396 transitions. [2023-12-02 16:54:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 16:54:53,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:54:53,731 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:54:53,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:54:53,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:54:53,932 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:54:53,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:54:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1090648000, now seen corresponding path program 1 times [2023-12-02 16:54:53,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:54:53,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829694975] [2023-12-02 16:54:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:54:53,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:54:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:54:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:54:54,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:54:54,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829694975] [2023-12-02 16:54:54,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829694975] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:54:54,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080836109] [2023-12-02 16:54:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:54:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:54:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:54:54,037 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:54:54,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:54:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:54:54,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:54:54,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:54:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:54:54,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:54:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:54:54,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080836109] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:54:54,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264221661] [2023-12-02 16:54:54,322 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-12-02 16:54:54,322 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:54:54,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:54:54,323 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:54:54,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:55:22,419 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 232 for LOIs [2023-12-02 16:55:22,589 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:56:14,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [264221661] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:56:14,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:56:14,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 27 [2023-12-02 16:56:14,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624564431] [2023-12-02 16:56:14,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:56:14,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 16:56:14,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:56:14,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 16:56:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-12-02 16:56:14,382 INFO L87 Difference]: Start difference. First operand 277 states and 396 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:56:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:56:18,440 INFO L93 Difference]: Finished difference Result 420 states and 630 transitions. [2023-12-02 16:56:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 16:56:18,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2023-12-02 16:56:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:56:18,443 INFO L225 Difference]: With dead ends: 420 [2023-12-02 16:56:18,443 INFO L226 Difference]: Without dead ends: 333 [2023-12-02 16:56:18,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-12-02 16:56:18,444 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 56 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:56:18,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 816 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-12-02 16:56:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-12-02 16:56:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 291. [2023-12-02 16:56:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 247 states have (on average 1.4777327935222673) internal successors, (365), 250 states have internal predecessors, (365), 26 states have call successors, (26), 19 states have call predecessors, (26), 17 states have return successors, (26), 21 states have call predecessors, (26), 25 states have call successors, (26) [2023-12-02 16:56:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 417 transitions. [2023-12-02 16:56:18,519 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 417 transitions. Word has length 55 [2023-12-02 16:56:18,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:56:18,520 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 417 transitions. [2023-12-02 16:56:18,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:56:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 417 transitions. [2023-12-02 16:56:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 16:56:18,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:56:18,521 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:56:18,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 16:56:18,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 16:56:18,722 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:56:18,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:56:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1876489005, now seen corresponding path program 1 times [2023-12-02 16:56:18,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:56:18,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109699727] [2023-12-02 16:56:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:18,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:56:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:56:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:56:18,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:56:18,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109699727] [2023-12-02 16:56:18,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109699727] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:56:18,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885640207] [2023-12-02 16:56:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:18,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:18,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:56:18,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:56:18,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:56:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:56:19,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:56:19,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:56:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:56:19,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:56:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:56:19,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885640207] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:56:19,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218105823] [2023-12-02 16:56:19,196 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-12-02 16:56:19,196 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:56:19,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:56:19,197 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:56:19,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:56:40,039 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 232 for LOIs [2023-12-02 16:56:40,201 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 241 for LOIs [2023-12-02 16:56:43,423 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 229 for LOIs [2023-12-02 16:56:43,586 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 239 for LOIs [2023-12-02 16:56:46,813 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 230 for LOIs [2023-12-02 16:56:46,966 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 248 for LOIs [2023-12-02 16:56:48,207 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:57:45,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [218105823] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:45,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:57:45,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [6, 5, 5] total 46 [2023-12-02 16:57:45,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146516505] [2023-12-02 16:57:45,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:45,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 16:57:45,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:45,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 16:57:45,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1928, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 16:57:45,139 INFO L87 Difference]: Start difference. First operand 291 states and 417 transitions. Second operand has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 24 states have internal predecessors, (32), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 16:57:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:54,795 INFO L93 Difference]: Finished difference Result 512 states and 761 transitions. [2023-12-02 16:57:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 16:57:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 24 states have internal predecessors, (32), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 56 [2023-12-02 16:57:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:54,799 INFO L225 Difference]: With dead ends: 512 [2023-12-02 16:57:54,799 INFO L226 Difference]: Without dead ends: 425 [2023-12-02 16:57:54,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 59.5s TimeCoverageRelationStatistics Valid=161, Invalid=2095, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 16:57:54,801 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 155 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:54,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1884 Invalid, 2558 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-12-02 16:57:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-12-02 16:57:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 300. [2023-12-02 16:57:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 256 states have (on average 1.48046875) internal successors, (379), 259 states have internal predecessors, (379), 26 states have call successors, (26), 19 states have call predecessors, (26), 17 states have return successors, (26), 21 states have call predecessors, (26), 25 states have call successors, (26) [2023-12-02 16:57:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 431 transitions. [2023-12-02 16:57:54,899 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 431 transitions. Word has length 56 [2023-12-02 16:57:54,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:54,899 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 431 transitions. [2023-12-02 16:57:54,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 24 states have internal predecessors, (32), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 16:57:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 431 transitions. [2023-12-02 16:57:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 16:57:54,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:54,901 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:57:54,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 16:57:55,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:57:55,102 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:55,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:55,103 INFO L85 PathProgramCache]: Analyzing trace with hash 974133676, now seen corresponding path program 1 times [2023-12-02 16:57:55,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:55,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409794499] [2023-12-02 16:57:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:55,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:57:55,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:55,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409794499] [2023-12-02 16:57:55,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409794499] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:57:55,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917536384] [2023-12-02 16:57:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:55,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:57:55,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:57:55,201 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:57:55,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:57:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:55,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:57:55,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:57:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:57:55,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:57:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:57:55,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917536384] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:57:55,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403749716] [2023-12-02 16:57:55,497 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-12-02 16:57:55,497 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:57:55,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:57:55,497 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:57:55,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:58:17,264 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 232 for LOIs [2023-12-02 16:58:17,443 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 242 for LOIs [2023-12-02 16:58:20,739 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 230 for LOIs [2023-12-02 16:58:20,885 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 240 for LOIs [2023-12-02 16:58:26,143 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 233 for LOIs [2023-12-02 16:58:26,277 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 231 for LOIs [2023-12-02 16:58:26,444 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 249 for LOIs [2023-12-02 16:58:27,779 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:34,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1403749716] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:34,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:59:34,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [6, 5, 5] total 49 [2023-12-02 16:59:34,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21335971] [2023-12-02 16:59:34,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:34,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 16:59:34,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 16:59:34,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2204, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 16:59:34,120 INFO L87 Difference]: Start difference. First operand 300 states and 431 transitions. Second operand has 41 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 25 states have internal predecessors, (30), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 16:59:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:44,990 INFO L93 Difference]: Finished difference Result 567 states and 836 transitions. [2023-12-02 16:59:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-02 16:59:44,991 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 25 states have internal predecessors, (30), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 56 [2023-12-02 16:59:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:44,994 INFO L225 Difference]: With dead ends: 567 [2023-12-02 16:59:44,994 INFO L226 Difference]: Without dead ends: 480 [2023-12-02 16:59:44,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 68.9s TimeCoverageRelationStatistics Valid=165, Invalid=2385, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 16:59:44,996 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 154 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 2834 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:44,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 2093 Invalid, 2866 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 2834 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-12-02 16:59:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-12-02 16:59:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 307. [2023-12-02 16:59:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 263 states have (on average 1.4866920152091254) internal successors, (391), 266 states have internal predecessors, (391), 26 states have call successors, (26), 19 states have call predecessors, (26), 17 states have return successors, (26), 21 states have call predecessors, (26), 25 states have call successors, (26) [2023-12-02 16:59:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 443 transitions. [2023-12-02 16:59:45,106 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 443 transitions. Word has length 56 [2023-12-02 16:59:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:45,106 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 443 transitions. [2023-12-02 16:59:45,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 25 states have internal predecessors, (30), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 16:59:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 443 transitions. [2023-12-02 16:59:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 16:59:45,108 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:45,108 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:45,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:59:45,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:45,309 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:45,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash -414905477, now seen corresponding path program 1 times [2023-12-02 16:59:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:45,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873404225] [2023-12-02 16:59:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:45,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:45,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873404225] [2023-12-02 16:59:45,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873404225] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:45,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606248411] [2023-12-02 16:59:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:45,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:45,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:45,383 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:45,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59de0e77-4266-4fba-b36d-f11c007e806c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 16:59:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:45,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:59:45,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:45,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:45,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606248411] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658607740] [2023-12-02 16:59:45,667 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-12-02 16:59:45,667 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:45,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:45,667 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:45,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:00:41,974 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 232 for LOIs [2023-12-02 17:00:42,154 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:01:09,822 WARN L293 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 447 DAG size of output: 447 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:01:17,901 WARN L293 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 448 DAG size of output: 447 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:01:26,275 WARN L293 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 454 DAG size of output: 453 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:01:34,688 WARN L293 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 452 DAG size of output: 451 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:01:43,313 WARN L293 SmtUtils]: Spent 8.32s on a formula simplification. DAG size of input: 456 DAG size of output: 455 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:01:51,833 WARN L293 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 454 DAG size of output: 453 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)