./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 195d502e207cba6e22b4d3a0f1eab4288ed491325552159482eaed582ac159e0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:57:17,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:57:17,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:57:17,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:57:17,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:57:17,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:57:17,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:57:17,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:57:17,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:57:17,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:57:17,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:57:17,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:57:17,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:57:17,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:57:17,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:57:17,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:57:17,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:57:17,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:57:17,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:57:17,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:57:17,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:57:17,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:57:17,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:57:17,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:57:17,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:57:17,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:57:17,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:57:17,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:57:17,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:57:17,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:57:17,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:57:17,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:57:17,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:57:17,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:57:17,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:57:17,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:57:17,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:57:17,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:57:17,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:57:17,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:57:17,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:57:17,431 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:57:17,482 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:57:17,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:57:17,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:57:17,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:57:17,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:57:17,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:57:17,486 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:57:17,486 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:57:17,487 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:57:17,487 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:57:17,488 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:57:17,489 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:57:17,489 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:57:17,489 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:57:17,489 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:57:17,490 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:57:17,490 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:57:17,490 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:57:17,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:57:17,492 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:57:17,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:57:17,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:57:17,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:57:17,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:57:17,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:57:17,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:57:17,495 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:57:17,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:57:17,496 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:57:17,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:57:17,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:57:17,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:57:17,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:17,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:57:17,498 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:57:17,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:57:17,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:57:17,499 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:57:17,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:57:17,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:57:17,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:57:17,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 195d502e207cba6e22b4d3a0f1eab4288ed491325552159482eaed582ac159e0 [2022-11-03 01:57:17,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:57:17,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:57:17,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:57:17,943 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:57:17,944 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:57:17,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec27_product19.cil.c [2022-11-03 01:57:18,038 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/data/ea8c1d1a5/ce13f802dd2f46be898daf7ac98e9a55/FLAG232df5396 [2022-11-03 01:57:18,859 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:57:18,860 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/sv-benchmarks/c/product-lines/email_spec27_product19.cil.c [2022-11-03 01:57:18,899 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/data/ea8c1d1a5/ce13f802dd2f46be898daf7ac98e9a55/FLAG232df5396 [2022-11-03 01:57:19,001 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/data/ea8c1d1a5/ce13f802dd2f46be898daf7ac98e9a55 [2022-11-03 01:57:19,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:57:19,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:57:19,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:19,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:57:19,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:57:19,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@312a8bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:19, skipping insertion in model container [2022-11-03 01:57:19,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:19" (1/1) ... [2022-11-03 01:57:19,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:57:19,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:57:19,693 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/sv-benchmarks/c/product-lines/email_spec27_product19.cil.c[17762,17775] [2022-11-03 01:57:19,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:19,965 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:57:20,052 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/sv-benchmarks/c/product-lines/email_spec27_product19.cil.c[17762,17775] [2022-11-03 01:57:20,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:20,168 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:57:20,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20 WrapperNode [2022-11-03 01:57:20,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:20,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:20,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:57:20,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:57:20,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,355 INFO L138 Inliner]: procedures = 127, calls = 200, calls flagged for inlining = 58, calls inlined = 53, statements flattened = 949 [2022-11-03 01:57:20,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:20,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:57:20,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:57:20,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:57:20,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,442 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:57:20,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:57:20,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:57:20,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:57:20,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (1/1) ... [2022-11-03 01:57:20,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:20,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:20,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:57:20,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:57:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 01:57:20,575 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 01:57:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 01:57:20,577 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 01:57:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 01:57:20,577 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 01:57:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 01:57:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 01:57:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 01:57:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 01:57:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 01:57:20,579 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 01:57:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 01:57:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 01:57:20,580 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 01:57:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 01:57:20,581 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 01:57:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:57:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 01:57:20,583 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 01:57:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 01:57:20,583 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 01:57:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 01:57:20,584 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 01:57:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 01:57:20,584 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 01:57:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure isVerified [2022-11-03 01:57:20,585 INFO L138 BoogieDeclarations]: Found implementation of procedure isVerified [2022-11-03 01:57:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 01:57:20,585 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 01:57:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 01:57:20,588 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 01:57:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 01:57:20,589 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 01:57:20,589 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 01:57:20,589 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 01:57:20,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:57:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 01:57:20,590 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 01:57:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:57:20,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:57:20,951 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:57:20,954 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:57:22,076 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:57:22,633 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:57:22,633 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:57:22,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:57:22 BoogieIcfgContainer [2022-11-03 01:57:22,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:57:22,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:57:22,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:57:22,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:57:22,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:57:19" (1/3) ... [2022-11-03 01:57:22,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a4c89b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:57:22, skipping insertion in model container [2022-11-03 01:57:22,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:20" (2/3) ... [2022-11-03 01:57:22,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a4c89b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:57:22, skipping insertion in model container [2022-11-03 01:57:22,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:57:22" (3/3) ... [2022-11-03 01:57:22,654 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec27_product19.cil.c [2022-11-03 01:57:22,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:57:22,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:57:22,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:57:22,780 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a129f1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:57:22,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:57:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 163 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 99 states have internal predecessors, (130), 46 states have call successors, (46), 18 states have call predecessors, (46), 18 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 01:57:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 01:57:22,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:22,824 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:22,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:22,868 INFO L85 PathProgramCache]: Analyzing trace with hash 106465906, now seen corresponding path program 1 times [2022-11-03 01:57:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:22,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812552384] [2022-11-03 01:57:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:22,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:57:23,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812552384] [2022-11-03 01:57:23,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812552384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:23,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:23,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:57:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233280149] [2022-11-03 01:57:23,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:23,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:57:23,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:23,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:57:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:57:23,556 INFO L87 Difference]: Start difference. First operand has 163 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 99 states have internal predecessors, (130), 46 states have call successors, (46), 18 states have call predecessors, (46), 18 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:57:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:23,767 INFO L93 Difference]: Finished difference Result 243 states and 322 transitions. [2022-11-03 01:57:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:57:23,771 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 68 [2022-11-03 01:57:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:23,788 INFO L225 Difference]: With dead ends: 243 [2022-11-03 01:57:23,788 INFO L226 Difference]: Without dead ends: 160 [2022-11-03 01:57:23,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:57:23,807 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:23,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-03 01:57:23,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-11-03 01:57:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 95 states have (on average 1.305263157894737) internal successors, (124), 96 states have internal predecessors, (124), 46 states have call successors, (46), 18 states have call predecessors, (46), 18 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-03 01:57:23,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 215 transitions. [2022-11-03 01:57:23,915 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 215 transitions. Word has length 68 [2022-11-03 01:57:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:23,918 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 215 transitions. [2022-11-03 01:57:23,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:57:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 215 transitions. [2022-11-03 01:57:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 01:57:23,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:23,930 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:23,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:57:23,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash -766850154, now seen corresponding path program 1 times [2022-11-03 01:57:23,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:23,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098594305] [2022-11-03 01:57:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:23,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:57:24,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:24,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098594305] [2022-11-03 01:57:24,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098594305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:24,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:24,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:57:24,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144398179] [2022-11-03 01:57:24,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:24,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:24,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:24,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:24,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:24,383 INFO L87 Difference]: Start difference. First operand 160 states and 215 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:57:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:24,590 INFO L93 Difference]: Finished difference Result 239 states and 310 transitions. [2022-11-03 01:57:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:24,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 69 [2022-11-03 01:57:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:24,594 INFO L225 Difference]: With dead ends: 239 [2022-11-03 01:57:24,594 INFO L226 Difference]: Without dead ends: 162 [2022-11-03 01:57:24,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:24,597 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 0 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:24,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 369 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-03 01:57:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-03 01:57:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 97 states have (on average 1.2989690721649485) internal successors, (126), 98 states have internal predecessors, (126), 46 states have call successors, (46), 18 states have call predecessors, (46), 18 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-03 01:57:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 217 transitions. [2022-11-03 01:57:24,621 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 217 transitions. Word has length 69 [2022-11-03 01:57:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:24,623 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 217 transitions. [2022-11-03 01:57:24,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:57:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 217 transitions. [2022-11-03 01:57:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 01:57:24,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:24,631 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:24,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:57:24,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1805419571, now seen corresponding path program 1 times [2022-11-03 01:57:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:24,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445855001] [2022-11-03 01:57:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:57:24,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:24,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445855001] [2022-11-03 01:57:24,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445855001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:24,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:24,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:57:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163827057] [2022-11-03 01:57:24,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:24,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:24,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:24,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:24,805 INFO L87 Difference]: Start difference. First operand 162 states and 217 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:57:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:24,966 INFO L93 Difference]: Finished difference Result 354 states and 493 transitions. [2022-11-03 01:57:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:24,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 74 [2022-11-03 01:57:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:24,970 INFO L225 Difference]: With dead ends: 354 [2022-11-03 01:57:24,970 INFO L226 Difference]: Without dead ends: 210 [2022-11-03 01:57:24,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:24,973 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 57 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:24,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 379 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-03 01:57:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2022-11-03 01:57:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 129 states have (on average 1.3875968992248062) internal successors, (179), 130 states have internal predecessors, (179), 57 states have call successors, (57), 18 states have call predecessors, (57), 18 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-11-03 01:57:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 292 transitions. [2022-11-03 01:57:25,022 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 292 transitions. Word has length 74 [2022-11-03 01:57:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:25,024 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 292 transitions. [2022-11-03 01:57:25,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:57:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 292 transitions. [2022-11-03 01:57:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:57:25,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:25,032 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:25,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:57:25,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:25,034 INFO L85 PathProgramCache]: Analyzing trace with hash 267407983, now seen corresponding path program 1 times [2022-11-03 01:57:25,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:25,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839843909] [2022-11-03 01:57:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:25,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:57:25,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:25,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839843909] [2022-11-03 01:57:25,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839843909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:25,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198156560] [2022-11-03 01:57:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:25,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:25,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:25,438 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:25,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:57:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:25,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:25,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:57:25,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:57:26,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198156560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191437567] [2022-11-03 01:57:26,100 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-03 01:57:26,101 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:26,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:26,114 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:26,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:58:03,422 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-03 01:58:03,835 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-03 01:58:04,354 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 256 for LOIs [2022-11-03 01:58:07,169 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 234 for LOIs [2022-11-03 01:58:07,242 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 258 for LOIs [2022-11-03 01:58:21,000 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 248 for LOIs [2022-11-03 01:58:21,039 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 248 for LOIs [2022-11-03 01:58:21,087 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 447 for LOIs [2022-11-03 01:58:22,038 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:58:38,314 WARN L234 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 444 DAG size of output: 244 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:45,909 WARN L234 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 467 DAG size of output: 264 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:06,552 WARN L234 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 476 DAG size of output: 293 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:14,147 WARN L234 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 486 DAG size of output: 324 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:21,080 WARN L234 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 498 DAG size of output: 344 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:27,938 WARN L234 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 508 DAG size of output: 290 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:40,432 WARN L234 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 563 DAG size of output: 328 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:47,063 WARN L234 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 559 DAG size of output: 324 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:53,956 WARN L234 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 565 DAG size of output: 330 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:06,269 WARN L234 SmtUtils]: Spent 7.97s on a formula simplification. DAG size of input: 447 DAG size of output: 306 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:14,934 WARN L234 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 462 DAG size of output: 309 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:57,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [191437567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:57,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:57,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [4, 4, 4] total 48 [2022-11-03 02:00:57,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626371202] [2022-11-03 02:00:57,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:57,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:00:57,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:57,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:00:57,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:00:57,473 INFO L87 Difference]: Start difference. First operand 205 states and 292 transitions. Second operand has 43 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 26 states have internal predecessors, (39), 14 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-03 02:01:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:32,147 INFO L93 Difference]: Finished difference Result 539 states and 816 transitions. [2022-11-03 02:01:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 02:01:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 26 states have internal predecessors, (39), 14 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 75 [2022-11-03 02:01:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:32,153 INFO L225 Difference]: With dead ends: 539 [2022-11-03 02:01:32,153 INFO L226 Difference]: Without dead ends: 352 [2022-11-03 02:01:32,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 167.4s TimeCoverageRelationStatistics Valid=173, Invalid=2479, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:01:32,157 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 247 mSDsluCounter, 4654 mSDsCounter, 0 mSdLazyCounter, 5335 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 4754 SdHoareTripleChecker+Invalid, 5374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 5335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:32,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 4754 Invalid, 5374 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [39 Valid, 5335 Invalid, 0 Unknown, 0 Unchecked, 22.0s Time] [2022-11-03 02:01:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-03 02:01:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 298. [2022-11-03 02:01:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 203 states have (on average 1.438423645320197) internal successors, (292), 205 states have internal predecessors, (292), 70 states have call successors, (70), 25 states have call predecessors, (70), 24 states have return successors, (70), 67 states have call predecessors, (70), 69 states have call successors, (70) [2022-11-03 02:01:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 432 transitions. [2022-11-03 02:01:32,375 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 432 transitions. Word has length 75 [2022-11-03 02:01:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:32,376 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 432 transitions. [2022-11-03 02:01:32,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 26 states have internal predecessors, (39), 14 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-03 02:01:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 432 transitions. [2022-11-03 02:01:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:01:32,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:32,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:32,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:32,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:32,584 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash 866655566, now seen corresponding path program 1 times [2022-11-03 02:01:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:32,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856542725] [2022-11-03 02:01:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:32,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:01:32,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856542725] [2022-11-03 02:01:32,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856542725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075874367] [2022-11-03 02:01:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:32,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:32,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:32,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:32,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:01:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:33,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:01:33,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:01:33,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:01:33,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075874367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:33,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288389333] [2022-11-03 02:01:33,219 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 02:01:33,219 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:33,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:33,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:33,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:01,807 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-03 02:02:02,159 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 256 for LOIs [2022-11-03 02:02:03,937 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 234 for LOIs [2022-11-03 02:02:03,977 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-03 02:02:04,330 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 256 for LOIs [2022-11-03 02:02:39,706 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 248 for LOIs [2022-11-03 02:02:39,737 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 248 for LOIs [2022-11-03 02:02:39,775 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 448 for LOIs [2022-11-03 02:02:40,533 INFO L197 IcfgInterpreter]: Interpreting procedure isVerified with input of size 440 for LOIs [2022-11-03 02:02:40,797 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 248 for LOIs [2022-11-03 02:02:40,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:54,064 WARN L234 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 444 DAG size of output: 244 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:03:00,123 WARN L234 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 467 DAG size of output: 264 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:03:24,505 WARN L234 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 486 DAG size of output: 324 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:03:30,843 WARN L234 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 498 DAG size of output: 344 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:03:37,357 WARN L234 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 508 DAG size of output: 290 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:03:49,144 WARN L234 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 563 DAG size of output: 328 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:03:54,579 WARN L234 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 559 DAG size of output: 324 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:04:00,102 WARN L234 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 565 DAG size of output: 330 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:05:03,338 WARN L234 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 612 DAG size of output: 471 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:05:12,116 WARN L234 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 612 DAG size of output: 417 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:05:19,081 WARN L234 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 610 DAG size of output: 382 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:05:26,480 WARN L234 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 646 DAG size of output: 418 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:05:39,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [288389333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:39,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:05:39,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [4, 4, 4] total 58 [2022-11-03 02:05:39,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657326078] [2022-11-03 02:05:39,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:39,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-03 02:05:39,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:39,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-03 02:05:39,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3114, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:05:39,748 INFO L87 Difference]: Start difference. First operand 298 states and 432 transitions. Second operand has 53 states, 35 states have (on average 1.2) internal successors, (42), 32 states have internal predecessors, (42), 16 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-03 02:06:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:14,777 INFO L93 Difference]: Finished difference Result 444 states and 637 transitions. [2022-11-03 02:06:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-03 02:06:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 35 states have (on average 1.2) internal successors, (42), 32 states have internal predecessors, (42), 16 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 80 [2022-11-03 02:06:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:14,781 INFO L225 Difference]: With dead ends: 444 [2022-11-03 02:06:14,781 INFO L226 Difference]: Without dead ends: 365 [2022-11-03 02:06:14,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 189.1s TimeCoverageRelationStatistics Valid=228, Invalid=3554, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 02:06:14,783 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 213 mSDsluCounter, 5503 mSDsCounter, 0 mSdLazyCounter, 6762 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 5567 SdHoareTripleChecker+Invalid, 6781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 6762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:14,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 5567 Invalid, 6781 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [19 Valid, 6762 Invalid, 0 Unknown, 0 Unchecked, 24.2s Time] [2022-11-03 02:06:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-03 02:06:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 306. [2022-11-03 02:06:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 208 states have (on average 1.4278846153846154) internal successors, (297), 210 states have internal predecessors, (297), 71 states have call successors, (71), 27 states have call predecessors, (71), 26 states have return successors, (71), 68 states have call predecessors, (71), 70 states have call successors, (71) [2022-11-03 02:06:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 439 transitions. [2022-11-03 02:06:14,933 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 439 transitions. Word has length 80 [2022-11-03 02:06:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:14,934 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 439 transitions. [2022-11-03 02:06:14,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 35 states have (on average 1.2) internal successors, (42), 32 states have internal predecessors, (42), 16 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-03 02:06:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 439 transitions. [2022-11-03 02:06:14,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:06:14,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:14,936 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:14,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:15,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:15,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:15,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1735431580, now seen corresponding path program 1 times [2022-11-03 02:06:15,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:15,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579701456] [2022-11-03 02:06:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:15,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:06:15,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:15,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579701456] [2022-11-03 02:06:15,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579701456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:15,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:15,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:06:15,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267798302] [2022-11-03 02:06:15,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:15,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:06:15,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:06:15,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:06:15,250 INFO L87 Difference]: Start difference. First operand 306 states and 439 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:06:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:15,595 INFO L93 Difference]: Finished difference Result 726 states and 1084 transitions. [2022-11-03 02:06:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:06:15,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 80 [2022-11-03 02:06:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:15,598 INFO L225 Difference]: With dead ends: 726 [2022-11-03 02:06:15,599 INFO L226 Difference]: Without dead ends: 446 [2022-11-03 02:06:15,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:06:15,601 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 55 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:15,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 395 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-03 02:06:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 439. [2022-11-03 02:06:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 316 states have (on average 1.5) internal successors, (474), 318 states have internal predecessors, (474), 96 states have call successors, (96), 27 states have call predecessors, (96), 26 states have return successors, (96), 93 states have call predecessors, (96), 95 states have call successors, (96) [2022-11-03 02:06:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 666 transitions. [2022-11-03 02:06:15,829 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 666 transitions. Word has length 80 [2022-11-03 02:06:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:15,829 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 666 transitions. [2022-11-03 02:06:15,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:06:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 666 transitions. [2022-11-03 02:06:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:06:15,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:15,832 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:15,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:06:15,833 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2109668581, now seen corresponding path program 1 times [2022-11-03 02:06:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:15,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976518008] [2022-11-03 02:06:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:06:15,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:15,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976518008] [2022-11-03 02:06:15,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976518008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:15,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230030491] [2022-11-03 02:06:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:15,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:15,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:15,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:06:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:16,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:06:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:06:16,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:06:16,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230030491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:16,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161811830] [2022-11-03 02:06:16,342 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 02:06:16,342 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:06:16,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:06:16,343 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:06:16,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:06:51,839 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 439 for LOIs [2022-11-03 02:06:52,137 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 442 for LOIs [2022-11-03 02:06:52,424 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:07:32,092 WARN L234 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 486 DAG size of output: 324 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:07:38,394 WARN L234 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 498 DAG size of output: 344 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:07:44,783 WARN L234 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 508 DAG size of output: 290 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:07:58,193 WARN L234 SmtUtils]: Spent 11.96s on a formula simplification. DAG size of input: 584 DAG size of output: 334 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:08:09,348 WARN L234 SmtUtils]: Spent 10.66s on a formula simplification. DAG size of input: 564 DAG size of output: 376 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:08:19,856 WARN L234 SmtUtils]: Spent 10.01s on a formula simplification. DAG size of input: 566 DAG size of output: 396 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:08:30,290 WARN L234 SmtUtils]: Spent 9.90s on a formula simplification. DAG size of input: 562 DAG size of output: 392 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:08:40,928 WARN L234 SmtUtils]: Spent 10.09s on a formula simplification. DAG size of input: 564 DAG size of output: 381 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:08:51,554 WARN L234 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 560 DAG size of output: 377 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:08:55,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [161811830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:55,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:08:55,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [4, 4, 4] total 30 [2022-11-03 02:08:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415849597] [2022-11-03 02:08:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:55,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:08:55,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:55,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:08:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:08:55,435 INFO L87 Difference]: Start difference. First operand 439 states and 666 transitions. Second operand has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-03 02:09:20,341 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 429 DAG size of output: 362 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:09:26,472 WARN L234 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 425 DAG size of output: 358 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:09:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:39,530 INFO L93 Difference]: Finished difference Result 824 states and 1285 transitions. [2022-11-03 02:09:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:09:39,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 81 [2022-11-03 02:09:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:39,534 INFO L225 Difference]: With dead ends: 824 [2022-11-03 02:09:39,535 INFO L226 Difference]: Without dead ends: 547 [2022-11-03 02:09:39,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 157.6s TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:09:39,537 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 188 mSDsluCounter, 2782 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:39,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 2883 Invalid, 2148 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [28 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-03 02:09:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-11-03 02:09:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 471. [2022-11-03 02:09:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 344 states have (on average 1.497093023255814) internal successors, (515), 348 states have internal predecessors, (515), 99 states have call successors, (99), 28 states have call predecessors, (99), 27 states have return successors, (99), 94 states have call predecessors, (99), 98 states have call successors, (99) [2022-11-03 02:09:39,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 713 transitions. [2022-11-03 02:09:39,833 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 713 transitions. Word has length 81 [2022-11-03 02:09:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:39,834 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 713 transitions. [2022-11-03 02:09:39,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-03 02:09:39,834 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 713 transitions. [2022-11-03 02:09:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 02:09:39,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:39,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:39,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:40,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:09:40,040 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2067488634, now seen corresponding path program 1 times [2022-11-03 02:09:40,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:40,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487496156] [2022-11-03 02:09:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:40,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:09:40,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:40,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487496156] [2022-11-03 02:09:40,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487496156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:09:40,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94422589] [2022-11-03 02:09:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:40,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:40,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:40,194 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:40,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdb6c0e-4a81-4238-b966-6950d2d5cfda/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:09:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:40,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:09:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:09:40,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:09:40,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94422589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:40,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [755857108] [2022-11-03 02:09:40,726 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-11-03 02:09:40,726 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:09:40,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:09:40,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:09:40,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs