./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product33.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_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/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_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/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_1a389c90-1b67-45de-aadc-d741dc631f75/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 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 --- 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 03:46:20,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:46:20,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:46:20,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:46:20,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:46:20,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:46:20,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:46:20,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:46:20,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:46:20,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:46:20,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:46:20,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:46:20,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:46:20,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:46:20,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:46:20,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:46:20,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:46:20,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:46:20,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:46:20,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:46:20,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:46:20,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:46:20,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:46:20,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:46:20,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:46:20,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:46:20,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:46:20,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:46:20,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:46:20,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:46:20,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:46:20,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:46:20,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:46:20,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:46:20,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:46:20,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:46:20,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:46:20,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:46:20,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:46:20,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:46:20,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:46:20,419 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:46:20,441 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:46:20,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:46:20,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:46:20,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:46:20,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:46:20,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:46:20,443 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:46:20,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:46:20,443 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:46:20,443 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:46:20,443 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:46:20,444 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:46:20,444 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:46:20,444 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:46:20,444 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:46:20,444 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:46:20,445 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:46:20,445 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:46:20,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:46:20,446 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:46:20,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:46:20,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:46:20,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:46:20,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:46:20,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:46:20,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:46:20,447 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:46:20,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:46:20,447 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:46:20,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:46:20,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:46:20,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:46:20,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:46:20,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:46:20,448 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:46:20,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:46:20,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:46:20,449 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:46:20,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:46:20,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:46:20,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:46:20,449 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_1a389c90-1b67-45de-aadc-d741dc631f75/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 [2022-11-03 03:46:20,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:46:20,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:46:20,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:46:20,758 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:46:20,758 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:46:20,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2022-11-03 03:46:20,832 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/data/ef4b4742e/99cbfd63619c4b77a022718ec7fafdf2/FLAGdaa126b64 [2022-11-03 03:46:21,552 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:46:21,553 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2022-11-03 03:46:21,572 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/data/ef4b4742e/99cbfd63619c4b77a022718ec7fafdf2/FLAGdaa126b64 [2022-11-03 03:46:21,736 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/data/ef4b4742e/99cbfd63619c4b77a022718ec7fafdf2 [2022-11-03 03:46:21,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:46:21,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:46:21,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:46:21,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:46:21,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:46:21,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:21" (1/1) ... [2022-11-03 03:46:21,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e84b360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:21, skipping insertion in model container [2022-11-03 03:46:21,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:21" (1/1) ... [2022-11-03 03:46:21,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:46:21,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:46:22,159 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_1a389c90-1b67-45de-aadc-d741dc631f75/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2022-11-03 03:46:22,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:46:22,593 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:46:22,636 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_1a389c90-1b67-45de-aadc-d741dc631f75/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2022-11-03 03:46:22,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:46:22,782 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:46:22,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22 WrapperNode [2022-11-03 03:46:22,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:46:22,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:46:22,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:46:22,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:46:22,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:22,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:22,924 INFO L138 Inliner]: procedures = 134, calls = 228, calls flagged for inlining = 65, calls inlined = 60, statements flattened = 1070 [2022-11-03 03:46:22,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:46:22,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:46:22,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:46:22,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:46:22,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:22,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:22,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:22,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:22,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:22,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:23,000 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:23,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:23,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:46:23,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:46:23,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:46:23,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:46:23,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (1/1) ... [2022-11-03 03:46:23,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:46:23,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:23,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:46:23,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:46:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 03:46:23,109 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 03:46:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-03 03:46:23,110 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-03 03:46:23,110 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-03 03:46:23,110 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-03 03:46:23,110 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 03:46:23,110 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 03:46:23,110 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 03:46:23,111 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 03:46:23,111 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 03:46:23,111 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 03:46:23,111 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 03:46:23,111 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 03:46:23,111 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-03 03:46:23,112 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-03 03:46:23,112 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 03:46:23,112 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 03:46:23,112 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 03:46:23,112 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 03:46:23,112 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 03:46:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 03:46:23,113 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 03:46:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2022-11-03 03:46:23,113 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2022-11-03 03:46:23,113 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 03:46:23,113 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 03:46:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:46:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 03:46:23,114 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 03:46:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-03 03:46:23,114 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-03 03:46:23,114 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 03:46:23,115 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 03:46:23,115 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 03:46:23,115 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 03:46:23,115 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 03:46:23,116 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 03:46:23,116 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 03:46:23,116 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 03:46:23,116 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 03:46:23,117 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 03:46:23,117 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-03 03:46:23,117 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-03 03:46:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 03:46:23,118 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 03:46:23,119 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 03:46:23,119 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 03:46:23,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:46:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 03:46:23,120 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 03:46:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:46:23,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:46:23,431 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:46:23,434 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:46:24,401 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:46:24,897 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:46:24,897 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:46:24,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:24 BoogieIcfgContainer [2022-11-03 03:46:24,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:46:24,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:46:24,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:46:24,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:46:24,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:46:21" (1/3) ... [2022-11-03 03:46:24,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436f694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:46:24, skipping insertion in model container [2022-11-03 03:46:24,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:22" (2/3) ... [2022-11-03 03:46:24,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436f694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:46:24, skipping insertion in model container [2022-11-03 03:46:24,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:24" (3/3) ... [2022-11-03 03:46:24,909 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec4_product33.cil.c [2022-11-03 03:46:24,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:46:24,929 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:46:25,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:46:25,008 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;@7908be8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:46:25,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:46:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 123 states have (on average 1.3089430894308942) internal successors, (161), 127 states have internal predecessors, (161), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-11-03 03:46:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 03:46:25,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:25,026 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] [2022-11-03 03:46:25,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:25,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:25,032 INFO L85 PathProgramCache]: Analyzing trace with hash 615482972, now seen corresponding path program 1 times [2022-11-03 03:46:25,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:25,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038934844] [2022-11-03 03:46:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:25,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:46:25,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:25,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038934844] [2022-11-03 03:46:25,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038934844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:25,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:25,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:46:25,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802357007] [2022-11-03 03:46:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:25,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:46:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:46:25,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:46:25,517 INFO L87 Difference]: Start difference. First operand has 212 states, 123 states have (on average 1.3089430894308942) internal successors, (161), 127 states have internal predecessors, (161), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 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 03:46:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:25,673 INFO L93 Difference]: Finished difference Result 341 states and 452 transitions. [2022-11-03 03:46:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:46:25,676 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 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 03:46:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:25,688 INFO L225 Difference]: With dead ends: 341 [2022-11-03 03:46:25,689 INFO L226 Difference]: Without dead ends: 209 [2022-11-03 03:46:25,694 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 03:46:25,697 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:25,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 244 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-03 03:46:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-11-03 03:46:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 121 states have (on average 1.28099173553719) internal successors, (155), 124 states have internal predecessors, (155), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-03 03:46:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 280 transitions. [2022-11-03 03:46:25,788 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 280 transitions. Word has length 68 [2022-11-03 03:46:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:25,790 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 280 transitions. [2022-11-03 03:46:25,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 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 03:46:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 280 transitions. [2022-11-03 03:46:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 03:46:25,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:25,795 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] [2022-11-03 03:46:25,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:46:25,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:25,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:25,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1507969483, now seen corresponding path program 1 times [2022-11-03 03:46:25,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:25,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638233925] [2022-11-03 03:46:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:25,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:46:26,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:26,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638233925] [2022-11-03 03:46:26,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638233925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:26,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:26,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:46:26,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104556561] [2022-11-03 03:46:26,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:26,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:46:26,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:26,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:46:26,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:26,154 INFO L87 Difference]: Start difference. First operand 209 states and 280 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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 03:46:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:26,343 INFO L93 Difference]: Finished difference Result 337 states and 440 transitions. [2022-11-03 03:46:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:46:26,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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 69 [2022-11-03 03:46:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:26,355 INFO L225 Difference]: With dead ends: 337 [2022-11-03 03:46:26,355 INFO L226 Difference]: Without dead ends: 211 [2022-11-03 03:46:26,362 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 03:46:26,363 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 0 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:26,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 481 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-03 03:46:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-11-03 03:46:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 123 states have (on average 1.2764227642276422) internal successors, (157), 126 states have internal predecessors, (157), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-03 03:46:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 282 transitions. [2022-11-03 03:46:26,405 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 282 transitions. Word has length 69 [2022-11-03 03:46:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:26,406 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 282 transitions. [2022-11-03 03:46:26,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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 03:46:26,407 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 282 transitions. [2022-11-03 03:46:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 03:46:26,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:26,412 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:26,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:46:26,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1250259340, now seen corresponding path program 1 times [2022-11-03 03:46:26,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:26,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340201890] [2022-11-03 03:46:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:26,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:46:26,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:26,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340201890] [2022-11-03 03:46:26,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340201890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:26,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:26,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:46:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109194269] [2022-11-03 03:46:26,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:26,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:46:26,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:26,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:46:26,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:26,561 INFO L87 Difference]: Start difference. First operand 211 states and 282 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 03:46:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:26,705 INFO L93 Difference]: Finished difference Result 452 states and 623 transitions. [2022-11-03 03:46:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:46:26,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 03:46:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:26,708 INFO L225 Difference]: With dead ends: 452 [2022-11-03 03:46:26,708 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 03:46:26,710 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 03:46:26,711 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 57 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:26,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 499 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 03:46:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 254. [2022-11-03 03:46:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 155 states have (on average 1.3548387096774193) internal successors, (210), 158 states have internal predecessors, (210), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-11-03 03:46:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 357 transitions. [2022-11-03 03:46:26,735 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 357 transitions. Word has length 74 [2022-11-03 03:46:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:26,736 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 357 transitions. [2022-11-03 03:46:26,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 03:46:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 357 transitions. [2022-11-03 03:46:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 03:46:26,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:26,754 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:26,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:46:26,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1843135173, now seen corresponding path program 1 times [2022-11-03 03:46:26,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:26,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899423071] [2022-11-03 03:46:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:26,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:46:26,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:26,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899423071] [2022-11-03 03:46:26,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899423071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:46:26,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78950703] [2022-11-03 03:46:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:26,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:26,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:26,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:46:26,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:46:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:27,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:46:27,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:46:27,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78950703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:27,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [654904690] [2022-11-03 03:46:27,537 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 03:46:27,538 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:46:27,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:46:27,549 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:46:27,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:47:12,480 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-03 03:47:12,807 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-03 03:47:13,141 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 476 for LOIs [2022-11-03 03:47:23,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:47:24,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:24,137 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 03:47:24,142 INFO L158 Benchmark]: Toolchain (without parser) took 62399.59ms. Allocated memory was 132.1MB in the beginning and 507.5MB in the end (delta: 375.4MB). Free memory was 100.1MB in the beginning and 339.9MB in the end (delta: -239.8MB). Peak memory consumption was 311.5MB. Max. memory is 16.1GB. [2022-11-03 03:47:24,142 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 83.9MB. Free memory is still 39.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:47:24,142 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1039.11ms. Allocated memory is still 132.1MB. Free memory was 99.8MB in the beginning and 81.2MB in the end (delta: 18.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-03 03:47:24,143 INFO L158 Benchmark]: Boogie Procedure Inliner took 141.22ms. Allocated memory is still 132.1MB. Free memory was 81.2MB in the beginning and 75.5MB in the end (delta: 5.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:47:24,143 INFO L158 Benchmark]: Boogie Preprocessor took 93.23ms. Allocated memory is still 132.1MB. Free memory was 74.9MB in the beginning and 70.1MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:47:24,144 INFO L158 Benchmark]: RCFGBuilder took 1881.34ms. Allocated memory was 132.1MB in the beginning and 161.5MB in the end (delta: 29.4MB). Free memory was 70.1MB in the beginning and 69.3MB in the end (delta: 850.5kB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. [2022-11-03 03:47:24,145 INFO L158 Benchmark]: TraceAbstraction took 59238.72ms. Allocated memory was 161.5MB in the beginning and 507.5MB in the end (delta: 346.0MB). Free memory was 68.2MB in the beginning and 339.9MB in the end (delta: -271.7MB). Peak memory consumption was 251.0MB. Max. memory is 16.1GB. [2022-11-03 03:47:24,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 83.9MB. Free memory is still 39.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1039.11ms. Allocated memory is still 132.1MB. Free memory was 99.8MB in the beginning and 81.2MB in the end (delta: 18.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 141.22ms. Allocated memory is still 132.1MB. Free memory was 81.2MB in the beginning and 75.5MB in the end (delta: 5.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 93.23ms. Allocated memory is still 132.1MB. Free memory was 74.9MB in the beginning and 70.1MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1881.34ms. Allocated memory was 132.1MB in the beginning and 161.5MB in the end (delta: 29.4MB). Free memory was 70.1MB in the beginning and 69.3MB in the end (delta: 850.5kB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. * TraceAbstraction took 59238.72ms. Allocated memory was 161.5MB in the beginning and 507.5MB in the end (delta: 346.0MB). Free memory was 68.2MB in the beginning and 339.9MB in the end (delta: -271.7MB). Peak memory consumption was 251.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 03:47:24,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/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_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/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 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 --- 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 03:47:26,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:47:26,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:47:26,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:47:26,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:47:26,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:47:26,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:47:26,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:47:26,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:47:26,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:47:26,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:47:26,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:47:26,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:47:26,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:47:26,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:47:26,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:47:26,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:47:26,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:47:26,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:47:26,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:47:26,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:47:26,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:47:26,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:47:26,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:47:26,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:47:26,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:47:26,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:47:26,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:47:26,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:47:26,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:47:26,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:47:26,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:47:26,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:47:26,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:47:26,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:47:26,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:47:26,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:47:26,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:47:26,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:47:26,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:47:26,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:47:26,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 03:47:26,716 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:47:26,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:47:26,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:47:26,719 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:47:26,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:47:26,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:47:26,721 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:47:26,721 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:47:26,722 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:47:26,722 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:47:26,723 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:47:26,723 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:47:26,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:47:26,725 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:47:26,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:47:26,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:47:26,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:47:26,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:47:26,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:47:26,727 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:47:26,727 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:47:26,727 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:47:26,727 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:47:26,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:47:26,728 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:47:26,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:47:26,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:47:26,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:47:26,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:47:26,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:26,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:47:26,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:47:26,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:47:26,730 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:47:26,730 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:26,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:47:26,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:47:26,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:47:26,731 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1a389c90-1b67-45de-aadc-d741dc631f75/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 [2022-11-03 03:47:27,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:47:27,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:47:27,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:47:27,195 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:47:27,196 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:47:27,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2022-11-03 03:47:27,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/data/178001519/bba49a0d30804b7f897e27690c9a95be/FLAGb7868d54e [2022-11-03 03:47:27,941 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:47:27,942 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2022-11-03 03:47:27,961 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/data/178001519/bba49a0d30804b7f897e27690c9a95be/FLAGb7868d54e [2022-11-03 03:47:28,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/data/178001519/bba49a0d30804b7f897e27690c9a95be [2022-11-03 03:47:28,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:47:28,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:47:28,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:28,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:47:28,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:47:28,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:28" (1/1) ... [2022-11-03 03:47:28,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6251b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:28, skipping insertion in model container [2022-11-03 03:47:28,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:28" (1/1) ... [2022-11-03 03:47:28,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:47:28,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:47:28,597 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_1a389c90-1b67-45de-aadc-d741dc631f75/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2022-11-03 03:47:28,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:28,982 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 03:47:29,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:47:29,042 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_1a389c90-1b67-45de-aadc-d741dc631f75/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2022-11-03 03:47:29,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:29,165 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:47:29,189 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_1a389c90-1b67-45de-aadc-d741dc631f75/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2022-11-03 03:47:29,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:29,266 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:47:29,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29 WrapperNode [2022-11-03 03:47:29,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:29,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:29,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:47:29,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:47:29,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,379 INFO L138 Inliner]: procedures = 136, calls = 228, calls flagged for inlining = 65, calls inlined = 60, statements flattened = 1010 [2022-11-03 03:47:29,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:29,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:47:29,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:47:29,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:47:29,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,460 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:47:29,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:47:29,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:47:29,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:47:29,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (1/1) ... [2022-11-03 03:47:29,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:29,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:29,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:47:29,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:47:29,578 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 03:47:29,578 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 03:47:29,578 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-03 03:47:29,579 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-03 03:47:29,579 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-03 03:47:29,579 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-03 03:47:29,579 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 03:47:29,579 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 03:47:29,580 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 03:47:29,580 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 03:47:29,580 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 03:47:29,580 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 03:47:29,580 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 03:47:29,581 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 03:47:29,581 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-03 03:47:29,581 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-03 03:47:29,581 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 03:47:29,581 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 03:47:29,582 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 03:47:29,582 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 03:47:29,582 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 03:47:29,582 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 03:47:29,583 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 03:47:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2022-11-03 03:47:29,583 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2022-11-03 03:47:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 03:47:29,584 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 03:47:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:47:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 03:47:29,587 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 03:47:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-03 03:47:29,587 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-03 03:47:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 03:47:29,587 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 03:47:29,588 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 03:47:29,588 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 03:47:29,588 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 03:47:29,588 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 03:47:29,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 03:47:29,589 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 03:47:29,589 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 03:47:29,589 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 03:47:29,589 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 03:47:29,590 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-03 03:47:29,590 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-03 03:47:29,591 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 03:47:29,591 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 03:47:29,592 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 03:47:29,593 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 03:47:29,594 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 03:47:29,594 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 03:47:29,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:47:29,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:47:29,891 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:47:29,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:47:31,116 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:47:31,129 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:47:31,130 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:47:31,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:31 BoogieIcfgContainer [2022-11-03 03:47:31,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:47:31,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:47:31,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:47:31,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:47:31,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:28" (1/3) ... [2022-11-03 03:47:31,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18669f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:31, skipping insertion in model container [2022-11-03 03:47:31,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:29" (2/3) ... [2022-11-03 03:47:31,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18669f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:31, skipping insertion in model container [2022-11-03 03:47:31,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:31" (3/3) ... [2022-11-03 03:47:31,142 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec4_product33.cil.c [2022-11-03 03:47:31,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:47:31,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:47:31,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:47:31,248 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;@3bb169be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:47:31,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:47:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 388 states, 299 states have (on average 1.5016722408026757) internal successors, (449), 303 states have internal predecessors, (449), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-11-03 03:47:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 03:47:31,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:31,274 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:31,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1753391489, now seen corresponding path program 1 times [2022-11-03 03:47:31,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:31,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216890441] [2022-11-03 03:47:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:31,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:31,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:31,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:31,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:47:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:31,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 03:47:31,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:47:31,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:31,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:31,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216890441] [2022-11-03 03:47:31,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216890441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:31,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:31,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:47:31,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653563751] [2022-11-03 03:47:31,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:31,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:47:31,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:47:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:47:31,853 INFO L87 Difference]: Start difference. First operand has 388 states, 299 states have (on average 1.5016722408026757) internal successors, (449), 303 states have internal predecessors, (449), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) Second operand has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:31,927 INFO L93 Difference]: Finished difference Result 617 states and 896 transitions. [2022-11-03 03:47:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:47:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 107 [2022-11-03 03:47:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:31,944 INFO L225 Difference]: With dead ends: 617 [2022-11-03 03:47:31,945 INFO L226 Difference]: Without dead ends: 381 [2022-11-03 03:47:31,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 106 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 03:47:31,955 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:31,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:47:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-03 03:47:32,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2022-11-03 03:47:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 293 states have (on average 1.4948805460750854) internal successors, (438), 296 states have internal predecessors, (438), 63 states have call successors, (63), 24 states have call predecessors, (63), 24 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-03 03:47:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 563 transitions. [2022-11-03 03:47:32,038 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 563 transitions. Word has length 107 [2022-11-03 03:47:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:32,039 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 563 transitions. [2022-11-03 03:47:32,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 563 transitions. [2022-11-03 03:47:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 03:47:32,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:32,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:32,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:32,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:32,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:32,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:32,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1713735028, now seen corresponding path program 1 times [2022-11-03 03:47:32,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:32,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982837630] [2022-11-03 03:47:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:32,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:32,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:32,273 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:32,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:47:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:32,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:47:32,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:47:32,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:32,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982837630] [2022-11-03 03:47:32,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982837630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:32,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:32,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:32,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329352989] [2022-11-03 03:47:32,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:32,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:32,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:32,757 INFO L87 Difference]: Start difference. First operand 381 states and 563 transitions. Second operand has 5 states, 4 states have (on average 17.25) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:32,938 INFO L93 Difference]: Finished difference Result 753 states and 1116 transitions. [2022-11-03 03:47:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:32,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.25) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) Word has length 108 [2022-11-03 03:47:32,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:32,951 INFO L225 Difference]: With dead ends: 753 [2022-11-03 03:47:32,952 INFO L226 Difference]: Without dead ends: 383 [2022-11-03 03:47:32,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:32,957 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 133 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:32,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 2063 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-03 03:47:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2022-11-03 03:47:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 294 states have (on average 1.4931972789115646) internal successors, (439), 298 states have internal predecessors, (439), 63 states have call successors, (63), 24 states have call predecessors, (63), 25 states have return successors, (64), 62 states have call predecessors, (64), 62 states have call successors, (64) [2022-11-03 03:47:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 566 transitions. [2022-11-03 03:47:32,993 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 566 transitions. Word has length 108 [2022-11-03 03:47:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:32,994 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 566 transitions. [2022-11-03 03:47:32,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.25) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 566 transitions. [2022-11-03 03:47:32,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 03:47:32,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:32,998 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:33,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:33,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:33,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:33,215 INFO L85 PathProgramCache]: Analyzing trace with hash -472137721, now seen corresponding path program 1 times [2022-11-03 03:47:33,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:33,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244725645] [2022-11-03 03:47:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:33,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:33,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:33,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:33,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:47:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:33,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:47:33,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:47:33,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:33,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:33,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244725645] [2022-11-03 03:47:33,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244725645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:33,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:33,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:33,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981171362] [2022-11-03 03:47:33,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:33,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:33,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:33,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:33,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:33,653 INFO L87 Difference]: Start difference. First operand 383 states and 566 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:33,762 INFO L93 Difference]: Finished difference Result 755 states and 1120 transitions. [2022-11-03 03:47:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:33,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 109 [2022-11-03 03:47:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:33,766 INFO L225 Difference]: With dead ends: 755 [2022-11-03 03:47:33,766 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 03:47:33,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:33,769 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 132 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 2052 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:33,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 2052 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:33,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 03:47:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2022-11-03 03:47:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 295 states have (on average 1.4915254237288136) internal successors, (440), 300 states have internal predecessors, (440), 63 states have call successors, (63), 24 states have call predecessors, (63), 26 states have return successors, (68), 62 states have call predecessors, (68), 62 states have call successors, (68) [2022-11-03 03:47:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 571 transitions. [2022-11-03 03:47:33,801 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 571 transitions. Word has length 109 [2022-11-03 03:47:33,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:33,802 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 571 transitions. [2022-11-03 03:47:33,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:33,802 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 571 transitions. [2022-11-03 03:47:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 03:47:33,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:33,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:33,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:34,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:34,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash -444898947, now seen corresponding path program 1 times [2022-11-03 03:47:34,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:34,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378041519] [2022-11-03 03:47:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:34,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:34,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:34,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:34,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:47:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:34,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:47:34,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:47:34,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:34,432 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:34,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378041519] [2022-11-03 03:47:34,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378041519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:34,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:34,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:34,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130093479] [2022-11-03 03:47:34,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:34,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:34,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:34,435 INFO L87 Difference]: Start difference. First operand 385 states and 571 transitions. Second operand has 5 states, 4 states have (on average 17.5) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:34,538 INFO L93 Difference]: Finished difference Result 747 states and 1110 transitions. [2022-11-03 03:47:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.5) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) Word has length 110 [2022-11-03 03:47:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:34,543 INFO L225 Difference]: With dead ends: 747 [2022-11-03 03:47:34,543 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 03:47:34,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:34,551 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 131 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:34,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 2066 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:47:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 03:47:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2022-11-03 03:47:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 295 states have (on average 1.4915254237288136) internal successors, (440), 300 states have internal predecessors, (440), 63 states have call successors, (63), 24 states have call predecessors, (63), 26 states have return successors, (67), 62 states have call predecessors, (67), 62 states have call successors, (67) [2022-11-03 03:47:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 570 transitions. [2022-11-03 03:47:34,596 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 570 transitions. Word has length 110 [2022-11-03 03:47:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:34,596 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 570 transitions. [2022-11-03 03:47:34,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.5) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 570 transitions. [2022-11-03 03:47:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 03:47:34,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:34,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:34,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-03 03:47:34,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:34,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash -538797990, now seen corresponding path program 2 times [2022-11-03 03:47:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:34,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212403670] [2022-11-03 03:47:34,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:47:34,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:34,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:34,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:34,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:47:35,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-03 03:47:35,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:47:35,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:47:35,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:47:35,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:35,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:35,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212403670] [2022-11-03 03:47:35,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212403670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:35,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:35,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:47:35,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613377584] [2022-11-03 03:47:35,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:35,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:47:35,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:35,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:47:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:35,299 INFO L87 Difference]: Start difference. First operand 385 states and 570 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:36,297 INFO L93 Difference]: Finished difference Result 840 states and 1252 transitions. [2022-11-03 03:47:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:47:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 111 [2022-11-03 03:47:36,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:36,320 INFO L225 Difference]: With dead ends: 840 [2022-11-03 03:47:36,320 INFO L226 Difference]: Without dead ends: 838 [2022-11-03 03:47:36,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:47:36,322 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 593 mSDsluCounter, 3807 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 4535 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:36,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 4535 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:47:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-11-03 03:47:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 745. [2022-11-03 03:47:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 574 states have (on average 1.5) internal successors, (861), 581 states have internal predecessors, (861), 120 states have call successors, (120), 47 states have call predecessors, (120), 50 states have return successors, (130), 120 states have call predecessors, (130), 118 states have call successors, (130) [2022-11-03 03:47:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1111 transitions. [2022-11-03 03:47:36,412 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1111 transitions. Word has length 111 [2022-11-03 03:47:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:36,412 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1111 transitions. [2022-11-03 03:47:36,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1111 transitions. [2022-11-03 03:47:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 03:47:36,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:36,417 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:36,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:36,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:36,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:36,631 INFO L85 PathProgramCache]: Analyzing trace with hash 612022276, now seen corresponding path program 1 times [2022-11-03 03:47:36,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:36,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811877539] [2022-11-03 03:47:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:36,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:36,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:36,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:36,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:47:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:36,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:47:36,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:47:36,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:36,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:36,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811877539] [2022-11-03 03:47:36,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811877539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:36,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:36,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564914002] [2022-11-03 03:47:36,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:36,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:36,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:36,998 INFO L87 Difference]: Start difference. First operand 745 states and 1111 transitions. Second operand has 5 states, 4 states have (on average 18.25) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:37,126 INFO L93 Difference]: Finished difference Result 1469 states and 2195 transitions. [2022-11-03 03:47:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:37,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 18.25) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) Word has length 112 [2022-11-03 03:47:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:37,136 INFO L225 Difference]: With dead ends: 1469 [2022-11-03 03:47:37,136 INFO L226 Difference]: Without dead ends: 747 [2022-11-03 03:47:37,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:37,145 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 129 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:37,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 2068 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:47:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-11-03 03:47:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 747. [2022-11-03 03:47:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 575 states have (on average 1.4991304347826087) internal successors, (862), 583 states have internal predecessors, (862), 120 states have call successors, (120), 47 states have call predecessors, (120), 51 states have return successors, (132), 120 states have call predecessors, (132), 118 states have call successors, (132) [2022-11-03 03:47:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1114 transitions. [2022-11-03 03:47:37,216 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1114 transitions. Word has length 112 [2022-11-03 03:47:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:37,217 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1114 transitions. [2022-11-03 03:47:37,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 18.25) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1114 transitions. [2022-11-03 03:47:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 03:47:37,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:37,224 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:37,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:37,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:37,445 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash 637019174, now seen corresponding path program 1 times [2022-11-03 03:47:37,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:37,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005996784] [2022-11-03 03:47:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:37,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:37,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:37,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:47:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:37,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:47:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:47:37,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:37,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:37,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005996784] [2022-11-03 03:47:37,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005996784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:37,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:37,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:37,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043276849] [2022-11-03 03:47:37,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:37,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:37,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:37,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:37,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:37,892 INFO L87 Difference]: Start difference. First operand 747 states and 1114 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:38,003 INFO L93 Difference]: Finished difference Result 1105 states and 1647 transitions. [2022-11-03 03:47:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:38,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 113 [2022-11-03 03:47:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:38,007 INFO L225 Difference]: With dead ends: 1105 [2022-11-03 03:47:38,007 INFO L226 Difference]: Without dead ends: 387 [2022-11-03 03:47:38,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:38,012 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 130 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:38,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 2055 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:38,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-03 03:47:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-11-03 03:47:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 296 states have (on average 1.489864864864865) internal successors, (441), 302 states have internal predecessors, (441), 63 states have call successors, (63), 24 states have call predecessors, (63), 27 states have return successors, (68), 62 states have call predecessors, (68), 62 states have call successors, (68) [2022-11-03 03:47:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 572 transitions. [2022-11-03 03:47:38,040 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 572 transitions. Word has length 113 [2022-11-03 03:47:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:38,041 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 572 transitions. [2022-11-03 03:47:38,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 572 transitions. [2022-11-03 03:47:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 03:47:38,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:38,044 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:38,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:38,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:38,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:38,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:38,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2027819500, now seen corresponding path program 1 times [2022-11-03 03:47:38,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:38,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768843735] [2022-11-03 03:47:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:38,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:38,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:38,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:38,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:47:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:47:38,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:47:38,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:38,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:38,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768843735] [2022-11-03 03:47:38,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768843735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:38,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:38,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145043315] [2022-11-03 03:47:38,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:38,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:38,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:38,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:38,659 INFO L87 Difference]: Start difference. First operand 387 states and 572 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:38,769 INFO L93 Difference]: Finished difference Result 749 states and 1113 transitions. [2022-11-03 03:47:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:38,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 113 [2022-11-03 03:47:38,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:38,772 INFO L225 Difference]: With dead ends: 749 [2022-11-03 03:47:38,773 INFO L226 Difference]: Without dead ends: 389 [2022-11-03 03:47:38,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:38,775 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 128 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2057 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:38,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 2057 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-11-03 03:47:38,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2022-11-03 03:47:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 297 states have (on average 1.4882154882154883) internal successors, (442), 304 states have internal predecessors, (442), 63 states have call successors, (63), 24 states have call predecessors, (63), 28 states have return successors, (72), 62 states have call predecessors, (72), 62 states have call successors, (72) [2022-11-03 03:47:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 577 transitions. [2022-11-03 03:47:38,800 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 577 transitions. Word has length 113 [2022-11-03 03:47:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:38,800 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 577 transitions. [2022-11-03 03:47:38,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 577 transitions. [2022-11-03 03:47:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:47:38,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:38,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:38,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:39,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:39,019 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash -491665773, now seen corresponding path program 1 times [2022-11-03 03:47:39,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:39,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462709771] [2022-11-03 03:47:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:39,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:39,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:39,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:39,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:47:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:39,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:39,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:47:39,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:39,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:39,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462709771] [2022-11-03 03:47:39,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462709771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:39,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:39,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:39,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851180053] [2022-11-03 03:47:39,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:39,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:39,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:39,399 INFO L87 Difference]: Start difference. First operand 389 states and 577 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:39,434 INFO L93 Difference]: Finished difference Result 615 states and 891 transitions. [2022-11-03 03:47:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 114 [2022-11-03 03:47:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:39,438 INFO L225 Difference]: With dead ends: 615 [2022-11-03 03:47:39,438 INFO L226 Difference]: Without dead ends: 392 [2022-11-03 03:47:39,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 112 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 03:47:39,440 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 1 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:39,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1120 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:47:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-03 03:47:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 391. [2022-11-03 03:47:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 299 states have (on average 1.4849498327759196) internal successors, (444), 306 states have internal predecessors, (444), 63 states have call successors, (63), 24 states have call predecessors, (63), 28 states have return successors, (72), 62 states have call predecessors, (72), 62 states have call successors, (72) [2022-11-03 03:47:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 579 transitions. [2022-11-03 03:47:39,466 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 579 transitions. Word has length 114 [2022-11-03 03:47:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:39,467 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 579 transitions. [2022-11-03 03:47:39,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 579 transitions. [2022-11-03 03:47:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 03:47:39,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:39,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:39,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:39,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:39,686 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:39,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1128181701, now seen corresponding path program 1 times [2022-11-03 03:47:39,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:39,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198206887] [2022-11-03 03:47:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:39,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:39,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:39,688 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:39,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:47:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:40,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:47:40,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:40,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:40,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198206887] [2022-11-03 03:47:40,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198206887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:40,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:40,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242567683] [2022-11-03 03:47:40,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:40,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:40,024 INFO L87 Difference]: Start difference. First operand 391 states and 579 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:40,080 INFO L93 Difference]: Finished difference Result 813 states and 1219 transitions. [2022-11-03 03:47:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 123 [2022-11-03 03:47:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:40,084 INFO L225 Difference]: With dead ends: 813 [2022-11-03 03:47:40,084 INFO L226 Difference]: Without dead ends: 453 [2022-11-03 03:47:40,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 03:47:40,086 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 115 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:40,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1107 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:47:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-03 03:47:40,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2022-11-03 03:47:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 342 states have (on average 1.5029239766081872) internal successors, (514), 349 states have internal predecessors, (514), 74 states have call successors, (74), 24 states have call predecessors, (74), 28 states have return successors, (85), 73 states have call predecessors, (85), 73 states have call successors, (85) [2022-11-03 03:47:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 673 transitions. [2022-11-03 03:47:40,122 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 673 transitions. Word has length 123 [2022-11-03 03:47:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:40,122 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 673 transitions. [2022-11-03 03:47:40,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 673 transitions. [2022-11-03 03:47:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:47:40,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:40,126 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:40,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:40,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:40,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:40,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1846600416, now seen corresponding path program 1 times [2022-11-03 03:47:40,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:40,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783585367] [2022-11-03 03:47:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:40,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:40,344 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:40,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:47:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:40,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:47:40,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:47:40,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:40,762 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:40,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783585367] [2022-11-03 03:47:40,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783585367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:40,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:40,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:40,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663353431] [2022-11-03 03:47:40,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:40,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:40,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:40,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:40,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:40,765 INFO L87 Difference]: Start difference. First operand 445 states and 673 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:40,959 INFO L93 Difference]: Finished difference Result 1010 states and 1550 transitions. [2022-11-03 03:47:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:47:40,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 124 [2022-11-03 03:47:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:40,964 INFO L225 Difference]: With dead ends: 1010 [2022-11-03 03:47:40,964 INFO L226 Difference]: Without dead ends: 594 [2022-11-03 03:47:40,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:40,967 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 652 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:40,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1296 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-11-03 03:47:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 453. [2022-11-03 03:47:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 349 states have (on average 1.489971346704871) internal successors, (520), 355 states have internal predecessors, (520), 74 states have call successors, (74), 26 states have call predecessors, (74), 29 states have return successors, (81), 73 states have call predecessors, (81), 73 states have call successors, (81) [2022-11-03 03:47:41,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 675 transitions. [2022-11-03 03:47:41,021 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 675 transitions. Word has length 124 [2022-11-03 03:47:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:41,022 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 675 transitions. [2022-11-03 03:47:41,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:41,022 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 675 transitions. [2022-11-03 03:47:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 03:47:41,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:41,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:41,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:41,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:41,241 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:41,242 INFO L85 PathProgramCache]: Analyzing trace with hash 101936082, now seen corresponding path program 1 times [2022-11-03 03:47:41,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:41,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190061053] [2022-11-03 03:47:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:41,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:41,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:41,244 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:41,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:47:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:41,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:47:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:47:41,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:47:41,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:41,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190061053] [2022-11-03 03:47:41,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190061053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:41,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1984624241] [2022-11-03 03:47:41,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:41,743 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:41,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:47:41,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:47:41,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 03:47:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:42,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:47:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:47:42,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:47:42,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1984624241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:42,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179404016] [2022-11-03 03:47:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:42,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:42,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:42,838 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:42,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:47:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:43,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:47:43,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:47:43,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:47:43,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179404016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:43,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:47:43,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 9, 9, 9, 9] total 20 [2022-11-03 03:47:43,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090391606] [2022-11-03 03:47:43,531 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:47:43,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 03:47:43,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 03:47:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:47:43,533 INFO L87 Difference]: Start difference. First operand 453 states and 675 transitions. Second operand has 20 states, 20 states have (on average 9.85) internal successors, (197), 18 states have internal predecessors, (197), 4 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (38), 6 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-03 03:47:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:55,638 INFO L93 Difference]: Finished difference Result 2595 states and 4125 transitions. [2022-11-03 03:47:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 03:47:55,639 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.85) internal successors, (197), 18 states have internal predecessors, (197), 4 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (38), 6 states have call predecessors, (38), 4 states have call successors, (38) Word has length 125 [2022-11-03 03:47:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:55,653 INFO L225 Difference]: With dead ends: 2595 [2022-11-03 03:47:55,653 INFO L226 Difference]: Without dead ends: 2372 [2022-11-03 03:47:55,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 03:47:55,680 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 5006 mSDsluCounter, 3745 mSDsCounter, 0 mSdLazyCounter, 9593 mSolverCounterSat, 1767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5092 SdHoareTripleChecker+Valid, 4721 SdHoareTripleChecker+Invalid, 11360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1767 IncrementalHoareTripleChecker+Valid, 9593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:55,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5092 Valid, 4721 Invalid, 11360 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1767 Valid, 9593 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-11-03 03:47:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2022-11-03 03:47:55,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 1591. [2022-11-03 03:47:55,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1257 states have (on average 1.5465393794749402) internal successors, (1944), 1268 states have internal predecessors, (1944), 274 states have call successors, (274), 51 states have call predecessors, (274), 59 states have return successors, (339), 275 states have call predecessors, (339), 272 states have call successors, (339) [2022-11-03 03:47:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2557 transitions. [2022-11-03 03:47:55,938 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2557 transitions. Word has length 125 [2022-11-03 03:47:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:55,938 INFO L495 AbstractCegarLoop]: Abstraction has 1591 states and 2557 transitions. [2022-11-03 03:47:55,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.85) internal successors, (197), 18 states have internal predecessors, (197), 4 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (38), 6 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-03 03:47:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2557 transitions. [2022-11-03 03:47:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 03:47:55,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:55,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:55,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:56,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:56,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:56,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:56,573 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:56,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1350949088, now seen corresponding path program 1 times [2022-11-03 03:47:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:56,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246668279] [2022-11-03 03:47:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:56,576 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:56,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:47:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:56,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:56,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:47:56,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:56,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:56,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246668279] [2022-11-03 03:47:56,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246668279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:56,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:56,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:56,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457678502] [2022-11-03 03:47:56,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:56,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:56,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:56,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:56,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:56,920 INFO L87 Difference]: Start difference. First operand 1591 states and 2557 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:57,271 INFO L93 Difference]: Finished difference Result 3695 states and 6067 transitions. [2022-11-03 03:47:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:57,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 128 [2022-11-03 03:47:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:57,285 INFO L225 Difference]: With dead ends: 3695 [2022-11-03 03:47:57,286 INFO L226 Difference]: Without dead ends: 2257 [2022-11-03 03:47:57,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 126 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 03:47:57,292 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 109 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:57,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1138 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:47:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2022-11-03 03:47:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2241. [2022-11-03 03:47:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 1779 states have (on average 1.5705452501405284) internal successors, (2794), 1790 states have internal predecessors, (2794), 402 states have call successors, (402), 51 states have call predecessors, (402), 59 states have return successors, (507), 403 states have call predecessors, (507), 400 states have call successors, (507) [2022-11-03 03:47:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 3703 transitions. [2022-11-03 03:47:57,633 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 3703 transitions. Word has length 128 [2022-11-03 03:47:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:57,633 INFO L495 AbstractCegarLoop]: Abstraction has 2241 states and 3703 transitions. [2022-11-03 03:47:57,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 3703 transitions. [2022-11-03 03:47:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 03:47:57,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:57,646 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:57,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:57,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:57,862 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:57,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1811958088, now seen corresponding path program 1 times [2022-11-03 03:47:57,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:57,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542358006] [2022-11-03 03:47:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:57,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:57,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:57,864 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:57,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:47:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:58,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:58,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:47:58,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:58,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542358006] [2022-11-03 03:47:58,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542358006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:58,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:58,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:58,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666135845] [2022-11-03 03:47:58,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:58,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:58,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:58,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:58,191 INFO L87 Difference]: Start difference. First operand 2241 states and 3703 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:58,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:58,765 INFO L93 Difference]: Finished difference Result 5295 states and 8825 transitions. [2022-11-03 03:47:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:58,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 129 [2022-11-03 03:47:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:58,783 INFO L225 Difference]: With dead ends: 5295 [2022-11-03 03:47:58,783 INFO L226 Difference]: Without dead ends: 3313 [2022-11-03 03:47:58,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 03:47:58,794 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 107 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:58,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1125 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:47:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2022-11-03 03:47:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 3297. [2022-11-03 03:47:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3297 states, 2645 states have (on average 1.57882797731569) internal successors, (4176), 2656 states have internal predecessors, (4176), 592 states have call successors, (592), 51 states have call predecessors, (592), 59 states have return successors, (729), 593 states have call predecessors, (729), 590 states have call successors, (729) [2022-11-03 03:47:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 5497 transitions. [2022-11-03 03:47:59,303 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 5497 transitions. Word has length 129 [2022-11-03 03:47:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:59,304 INFO L495 AbstractCegarLoop]: Abstraction has 3297 states and 5497 transitions. [2022-11-03 03:47:59,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 5497 transitions. [2022-11-03 03:47:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 03:47:59,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:59,321 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:59,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:59,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:59,537 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:59,537 INFO L85 PathProgramCache]: Analyzing trace with hash -893297710, now seen corresponding path program 1 times [2022-11-03 03:47:59,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:59,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952228754] [2022-11-03 03:47:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:59,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:59,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:59,539 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:59,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:47:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:59,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:59,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:47:59,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:59,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:59,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952228754] [2022-11-03 03:47:59,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952228754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:59,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:59,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:59,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386087177] [2022-11-03 03:47:59,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:59,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:59,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:59,860 INFO L87 Difference]: Start difference. First operand 3297 states and 5497 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:48:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:00,500 INFO L93 Difference]: Finished difference Result 7687 states and 12947 transitions. [2022-11-03 03:48:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2022-11-03 03:48:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:00,526 INFO L225 Difference]: With dead ends: 7687 [2022-11-03 03:48:00,526 INFO L226 Difference]: Without dead ends: 4915 [2022-11-03 03:48:00,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 128 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 03:48:00,536 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 105 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:00,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1119 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:48:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2022-11-03 03:48:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 4899. [2022-11-03 03:48:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4899 states, 4001 states have (on average 1.5851037240689827) internal successors, (6342), 4012 states have internal predecessors, (6342), 838 states have call successors, (838), 51 states have call predecessors, (838), 59 states have return successors, (1059), 839 states have call predecessors, (1059), 836 states have call successors, (1059) [2022-11-03 03:48:01,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4899 states to 4899 states and 8239 transitions. [2022-11-03 03:48:01,694 INFO L78 Accepts]: Start accepts. Automaton has 4899 states and 8239 transitions. Word has length 130 [2022-11-03 03:48:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:01,694 INFO L495 AbstractCegarLoop]: Abstraction has 4899 states and 8239 transitions. [2022-11-03 03:48:01,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:48:01,695 INFO L276 IsEmpty]: Start isEmpty. Operand 4899 states and 8239 transitions. [2022-11-03 03:48:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 03:48:01,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:01,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:01,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:01,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:01,946 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:01,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:01,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2038579383, now seen corresponding path program 1 times [2022-11-03 03:48:01,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:01,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493505270] [2022-11-03 03:48:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:01,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:01,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:01,948 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:01,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:48:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:48:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:48:02,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:02,256 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493505270] [2022-11-03 03:48:02,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493505270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:02,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:02,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:48:02,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419265445] [2022-11-03 03:48:02,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:02,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:02,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:02,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:02,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:48:02,259 INFO L87 Difference]: Start difference. First operand 4899 states and 8239 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:48:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:03,195 INFO L93 Difference]: Finished difference Result 11419 states and 19385 transitions. [2022-11-03 03:48:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 131 [2022-11-03 03:48:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:03,239 INFO L225 Difference]: With dead ends: 11419 [2022-11-03 03:48:03,239 INFO L226 Difference]: Without dead ends: 7477 [2022-11-03 03:48:03,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 03:48:03,252 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 103 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:03,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1119 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:48:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7477 states. [2022-11-03 03:48:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7477 to 7461. [2022-11-03 03:48:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7461 states, 6205 states have (on average 1.5890410958904109) internal successors, (9860), 6216 states have internal predecessors, (9860), 1196 states have call successors, (1196), 51 states have call predecessors, (1196), 59 states have return successors, (1557), 1197 states have call predecessors, (1557), 1194 states have call successors, (1557) [2022-11-03 03:48:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7461 states to 7461 states and 12613 transitions. [2022-11-03 03:48:04,878 INFO L78 Accepts]: Start accepts. Automaton has 7461 states and 12613 transitions. Word has length 131 [2022-11-03 03:48:04,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:04,878 INFO L495 AbstractCegarLoop]: Abstraction has 7461 states and 12613 transitions. [2022-11-03 03:48:04,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:48:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 7461 states and 12613 transitions. [2022-11-03 03:48:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 03:48:04,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:04,904 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:04,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:05,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:05,120 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:05,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1812755158, now seen corresponding path program 1 times [2022-11-03 03:48:05,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:05,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167411236] [2022-11-03 03:48:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:05,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:05,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:05,122 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:05,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:48:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:05,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:48:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:48:05,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:05,419 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167411236] [2022-11-03 03:48:05,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167411236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:05,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:05,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:48:05,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832181829] [2022-11-03 03:48:05,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:05,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:05,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:48:05,429 INFO L87 Difference]: Start difference. First operand 7461 states and 12613 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:48:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:06,809 INFO L93 Difference]: Finished difference Result 17563 states and 29971 transitions. [2022-11-03 03:48:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 132 [2022-11-03 03:48:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:06,859 INFO L225 Difference]: With dead ends: 17563 [2022-11-03 03:48:06,859 INFO L226 Difference]: Without dead ends: 11715 [2022-11-03 03:48:06,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 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 03:48:06,878 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 101 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:06,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1123 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:48:06,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11715 states. [2022-11-03 03:48:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11715 to 11699. [2022-11-03 03:48:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11699 states, 9691 states have (on average 1.582911980187803) internal successors, (15340), 9702 states have internal predecessors, (15340), 1948 states have call successors, (1948), 51 states have call predecessors, (1948), 59 states have return successors, (2553), 1949 states have call predecessors, (2553), 1946 states have call successors, (2553) [2022-11-03 03:48:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11699 states to 11699 states and 19841 transitions. [2022-11-03 03:48:09,175 INFO L78 Accepts]: Start accepts. Automaton has 11699 states and 19841 transitions. Word has length 132 [2022-11-03 03:48:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:09,175 INFO L495 AbstractCegarLoop]: Abstraction has 11699 states and 19841 transitions. [2022-11-03 03:48:09,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:48:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 11699 states and 19841 transitions. [2022-11-03 03:48:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 03:48:09,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:09,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:09,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:09,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:09,432 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:09,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1986997683, now seen corresponding path program 1 times [2022-11-03 03:48:09,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:09,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170600278] [2022-11-03 03:48:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:09,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:09,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:09,435 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:09,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:48:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:09,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:48:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:48:09,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:09,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170600278] [2022-11-03 03:48:09,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170600278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:09,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:09,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:48:09,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340311346] [2022-11-03 03:48:09,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:09,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:09,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:09,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:09,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:48:09,799 INFO L87 Difference]: Start difference. First operand 11699 states and 19841 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:48:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:12,444 INFO L93 Difference]: Finished difference Result 28685 states and 48895 transitions. [2022-11-03 03:48:12,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:12,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 133 [2022-11-03 03:48:12,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:12,522 INFO L225 Difference]: With dead ends: 28685 [2022-11-03 03:48:12,522 INFO L226 Difference]: Without dead ends: 19393 [2022-11-03 03:48:12,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 03:48:12,549 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 99 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:12,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1124 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:48:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19393 states. [2022-11-03 03:48:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19393 to 19377. [2022-11-03 03:48:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19377 states, 16157 states have (on average 1.5809865692888532) internal successors, (25544), 16168 states have internal predecessors, (25544), 3160 states have call successors, (3160), 51 states have call predecessors, (3160), 59 states have return successors, (4065), 3161 states have call predecessors, (4065), 3158 states have call successors, (4065) [2022-11-03 03:48:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19377 states to 19377 states and 32769 transitions. [2022-11-03 03:48:16,359 INFO L78 Accepts]: Start accepts. Automaton has 19377 states and 32769 transitions. Word has length 133 [2022-11-03 03:48:16,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:16,360 INFO L495 AbstractCegarLoop]: Abstraction has 19377 states and 32769 transitions. [2022-11-03 03:48:16,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:48:16,360 INFO L276 IsEmpty]: Start isEmpty. Operand 19377 states and 32769 transitions. [2022-11-03 03:48:16,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:48:16,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:16,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:16,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:16,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:16,629 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:16,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:16,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1264148328, now seen corresponding path program 1 times [2022-11-03 03:48:16,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:16,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532888843] [2022-11-03 03:48:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:16,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:16,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:16,633 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:16,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:48:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:16,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:48:16,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:48:17,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:17,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532888843] [2022-11-03 03:48:17,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532888843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:17,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:17,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:48:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499158537] [2022-11-03 03:48:17,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:17,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:17,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:17,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:17,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:48:17,035 INFO L87 Difference]: Start difference. First operand 19377 states and 32769 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:48:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:20,859 INFO L93 Difference]: Finished difference Result 49893 states and 84827 transitions. [2022-11-03 03:48:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:20,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 134 [2022-11-03 03:48:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:21,010 INFO L225 Difference]: With dead ends: 49893 [2022-11-03 03:48:21,010 INFO L226 Difference]: Without dead ends: 33875 [2022-11-03 03:48:21,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 132 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 03:48:21,059 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 97 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:21,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1132 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:48:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33875 states. [2022-11-03 03:48:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33875 to 33859. [2022-11-03 03:48:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33859 states, 28233 states have (on average 1.5727694541848192) internal successors, (44404), 28244 states have internal predecessors, (44404), 5566 states have call successors, (5566), 51 states have call predecessors, (5566), 59 states have return successors, (7177), 5567 states have call predecessors, (7177), 5564 states have call successors, (7177) [2022-11-03 03:48:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33859 states to 33859 states and 57147 transitions. [2022-11-03 03:48:26,915 INFO L78 Accepts]: Start accepts. Automaton has 33859 states and 57147 transitions. Word has length 134 [2022-11-03 03:48:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:26,916 INFO L495 AbstractCegarLoop]: Abstraction has 33859 states and 57147 transitions. [2022-11-03 03:48:26,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:48:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 33859 states and 57147 transitions. [2022-11-03 03:48:26,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 03:48:26,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:26,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:26,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:27,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:27,196 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:27,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1229619858, now seen corresponding path program 1 times [2022-11-03 03:48:27,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:27,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608275061] [2022-11-03 03:48:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:27,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:27,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:27,199 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:27,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a389c90-1b67-45de-aadc-d741dc631f75/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:48:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:27,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:48:27,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:48:27,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:27,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:27,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608275061] [2022-11-03 03:48:27,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608275061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:27,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:27,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:48:27,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546683497] [2022-11-03 03:48:27,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:27,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:27,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:48:27,560 INFO L87 Difference]: Start difference. First operand 33859 states and 57147 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14)