./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/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 bad89116a36bb46e02a3fc807805b2b6d03550190d8073d361f25c2754b15f25 --- 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 02:13:10,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:13:10,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:13:10,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:13:10,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:13:10,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:13:10,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:13:10,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:13:10,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:13:10,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:13:10,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:13:10,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:13:10,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:13:10,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:13:10,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:13:10,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:13:10,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:13:10,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:13:10,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:13:10,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:13:10,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:13:10,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:13:10,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:13:10,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:13:10,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:13:10,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:13:10,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:13:10,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:13:10,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:13:10,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:13:10,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:13:10,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:13:10,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:13:10,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:13:10,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:13:10,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:13:10,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:13:10,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:13:10,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:13:10,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:13:10,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:13:10,612 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:13:10,657 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:13:10,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:13:10,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:13:10,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:13:10,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:13:10,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:13:10,660 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:13:10,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:13:10,660 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:13:10,660 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:13:10,661 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:13:10,662 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:13:10,662 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:13:10,662 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:13:10,662 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:13:10,662 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:13:10,663 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:13:10,663 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:13:10,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:13:10,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:13:10,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:13:10,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:13:10,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:13:10,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:13:10,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:13:10,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:13:10,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:13:10,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:13:10,667 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:13:10,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:13:10,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:13:10,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:13:10,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:13:10,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:13:10,668 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:13:10,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:13:10,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:13:10,669 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:13:10,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:13:10,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:13:10,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:13:10,669 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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bad89116a36bb46e02a3fc807805b2b6d03550190d8073d361f25c2754b15f25 [2022-11-03 02:13:10,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:13:10,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:13:11,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:13:11,001 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:13:11,002 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:13:11,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec6_product31.cil.c [2022-11-03 02:13:11,070 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/data/e75e1f66c/6c868952d5c64b4182fb542c807b81f9/FLAGd4915bee0 [2022-11-03 02:13:11,770 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:13:11,771 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/sv-benchmarks/c/product-lines/email_spec6_product31.cil.c [2022-11-03 02:13:11,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/data/e75e1f66c/6c868952d5c64b4182fb542c807b81f9/FLAGd4915bee0 [2022-11-03 02:13:11,997 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/data/e75e1f66c/6c868952d5c64b4182fb542c807b81f9 [2022-11-03 02:13:12,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:13:12,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:13:12,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:13:12,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:13:12,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:13:12,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:13:11" (1/1) ... [2022-11-03 02:13:12,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bbf7010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12, skipping insertion in model container [2022-11-03 02:13:12,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:13:11" (1/1) ... [2022-11-03 02:13:12,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:13:12,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:13:12,451 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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/sv-benchmarks/c/product-lines/email_spec6_product31.cil.c[31008,31021] [2022-11-03 02:13:12,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:13:12,775 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:13:12,854 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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/sv-benchmarks/c/product-lines/email_spec6_product31.cil.c[31008,31021] [2022-11-03 02:13:12,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:13:12,931 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:13:12,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12 WrapperNode [2022-11-03 02:13:12,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:13:12,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:13:12,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:13:12,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:13:12,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:12,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:13,036 INFO L138 Inliner]: procedures = 132, calls = 225, calls flagged for inlining = 62, calls inlined = 57, statements flattened = 1045 [2022-11-03 02:13:13,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:13:13,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:13:13,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:13:13,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:13:13,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:13,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:13,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:13,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:13,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:13,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:13,138 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:13,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:13,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:13:13,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:13:13,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:13:13,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:13:13,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (1/1) ... [2022-11-03 02:13:13,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:13:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:13,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:13:13,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:13:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 02:13:13,247 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 02:13:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-03 02:13:13,247 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-03 02:13:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-03 02:13:13,247 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-03 02:13:13,248 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 02:13:13,248 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 02:13:13,248 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 02:13:13,248 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 02:13:13,248 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 02:13:13,249 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 02:13:13,249 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 02:13:13,249 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 02:13:13,249 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-03 02:13:13,249 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-03 02:13:13,250 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 02:13:13,251 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 02:13:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 02:13:13,251 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 02:13:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 02:13:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 02:13:13,251 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 02:13:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 02:13:13,252 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 02:13:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:13:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 02:13:13,252 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 02:13:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-03 02:13:13,253 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-03 02:13:13,253 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 02:13:13,253 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 02:13:13,253 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 02:13:13,254 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 02:13:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 02:13:13,254 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 02:13:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 02:13:13,255 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 02:13:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 02:13:13,255 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 02:13:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-03 02:13:13,255 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-03 02:13:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 02:13:13,256 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 02:13:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 02:13:13,257 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 02:13:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:13:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 02:13:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 02:13:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:13:13,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:13:13,570 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:13:13,573 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:13:14,626 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:13:15,166 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:13:15,167 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:13:15,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:13:15 BoogieIcfgContainer [2022-11-03 02:13:15,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:13:15,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:13:15,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:13:15,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:13:15,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:13:11" (1/3) ... [2022-11-03 02:13:15,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58803572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:13:15, skipping insertion in model container [2022-11-03 02:13:15,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:12" (2/3) ... [2022-11-03 02:13:15,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58803572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:13:15, skipping insertion in model container [2022-11-03 02:13:15,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:13:15" (3/3) ... [2022-11-03 02:13:15,180 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec6_product31.cil.c [2022-11-03 02:13:15,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:13:15,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:13:15,258 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:13:15,266 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;@1f9951d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:13:15,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:13:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 119 states have (on average 1.3109243697478992) internal successors, (156), 123 states have internal predecessors, (156), 61 states have call successors, (61), 23 states have call predecessors, (61), 23 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-11-03 02:13:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:13:15,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:15,292 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, 1, 1, 1, 1, 1] [2022-11-03 02:13:15,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:15,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:15,299 INFO L85 PathProgramCache]: Analyzing trace with hash -371379297, now seen corresponding path program 1 times [2022-11-03 02:13:15,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:15,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374394026] [2022-11-03 02:13:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:15,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:13:15,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:15,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374394026] [2022-11-03 02:13:15,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374394026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:15,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:15,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:13:15,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317842941] [2022-11-03 02:13:15,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:15,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:13:15,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:13:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:13:15,824 INFO L87 Difference]: Start difference. First operand has 205 states, 119 states have (on average 1.3109243697478992) internal successors, (156), 123 states have internal predecessors, (156), 61 states have call successors, (61), 23 states have call predecessors, (61), 23 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:13:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:16,024 INFO L93 Difference]: Finished difference Result 327 states and 434 transitions. [2022-11-03 02:13:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:13:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 80 [2022-11-03 02:13:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:16,044 INFO L225 Difference]: With dead ends: 327 [2022-11-03 02:13:16,044 INFO L226 Difference]: Without dead ends: 202 [2022-11-03 02:13:16,054 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 02:13:16,059 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:16,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 237 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:13:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-03 02:13:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-11-03 02:13:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 117 states have (on average 1.2820512820512822) internal successors, (150), 120 states have internal predecessors, (150), 61 states have call successors, (61), 23 states have call predecessors, (61), 23 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-11-03 02:13:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 271 transitions. [2022-11-03 02:13:16,161 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 271 transitions. Word has length 80 [2022-11-03 02:13:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:16,162 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 271 transitions. [2022-11-03 02:13:16,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:13:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 271 transitions. [2022-11-03 02:13:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:13:16,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:16,167 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, 1, 1, 1, 1, 1, 1] [2022-11-03 02:13:16,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:13:16,168 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1238501977, now seen corresponding path program 1 times [2022-11-03 02:13:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:16,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726297549] [2022-11-03 02:13:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:16,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:13:16,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:16,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726297549] [2022-11-03 02:13:16,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726297549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:16,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:16,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:13:16,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163646234] [2022-11-03 02:13:16,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:16,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:13:16,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:16,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:13:16,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:13:16,471 INFO L87 Difference]: Start difference. First operand 202 states and 271 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:13:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:16,608 INFO L93 Difference]: Finished difference Result 323 states and 422 transitions. [2022-11-03 02:13:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:13:16,608 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 81 [2022-11-03 02:13:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:16,611 INFO L225 Difference]: With dead ends: 323 [2022-11-03 02:13:16,611 INFO L226 Difference]: Without dead ends: 204 [2022-11-03 02:13:16,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:13:16,614 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 0 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:16,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 467 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:13:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-03 02:13:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-11-03 02:13:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 122 states have internal predecessors, (152), 61 states have call successors, (61), 23 states have call predecessors, (61), 23 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-11-03 02:13:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 273 transitions. [2022-11-03 02:13:16,632 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 273 transitions. Word has length 81 [2022-11-03 02:13:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:16,633 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 273 transitions. [2022-11-03 02:13:16,633 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:13:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 273 transitions. [2022-11-03 02:13:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:13:16,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:16,636 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:13:16,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:13:16,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1933579366, now seen corresponding path program 1 times [2022-11-03 02:13:16,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:16,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295591407] [2022-11-03 02:13:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:16,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:13:16,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:16,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295591407] [2022-11-03 02:13:16,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295591407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:16,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:16,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:13:16,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723160441] [2022-11-03 02:13:16,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:16,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:13:16,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:16,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:13:16,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:13:16,866 INFO L87 Difference]: Start difference. First operand 204 states and 273 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:13:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:17,043 INFO L93 Difference]: Finished difference Result 438 states and 605 transitions. [2022-11-03 02:13:17,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:13:17,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 86 [2022-11-03 02:13:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:17,046 INFO L225 Difference]: With dead ends: 438 [2022-11-03 02:13:17,046 INFO L226 Difference]: Without dead ends: 252 [2022-11-03 02:13:17,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:13:17,049 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 57 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:17,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 486 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:13:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-03 02:13:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2022-11-03 02:13:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 151 states have (on average 1.3576158940397351) internal successors, (205), 154 states have internal predecessors, (205), 72 states have call successors, (72), 23 states have call predecessors, (72), 23 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-03 02:13:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 348 transitions. [2022-11-03 02:13:17,073 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 348 transitions. Word has length 86 [2022-11-03 02:13:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:17,073 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 348 transitions. [2022-11-03 02:13:17,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:13:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 348 transitions. [2022-11-03 02:13:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:13:17,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:17,076 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:13:17,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:13:17,077 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1100851635, now seen corresponding path program 1 times [2022-11-03 02:13:17,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:17,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735985563] [2022-11-03 02:13:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:17,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:13:17,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:17,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735985563] [2022-11-03 02:13:17,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735985563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:13:17,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978024753] [2022-11-03 02:13:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:17,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:17,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:17,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:17,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:13:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:17,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:13:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:13:17,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:13:17,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978024753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:17,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [464612241] [2022-11-03 02:13:17,974 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2022-11-03 02:13:17,975 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:13:17,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:13:17,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:13:17,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:13:56,739 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 443 for LOIs [2022-11-03 02:13:57,068 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 486 for LOIs [2022-11-03 02:14:08,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:14:08,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:08,407 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 02:14:08,414 INFO L158 Benchmark]: Toolchain (without parser) took 56412.13ms. Allocated memory was 96.5MB in the beginning and 486.5MB in the end (delta: 390.1MB). Free memory was 63.7MB in the beginning and 430.2MB in the end (delta: -366.5MB). Peak memory consumption was 300.0MB. Max. memory is 16.1GB. [2022-11-03 02:14:08,414 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 96.5MB. Free memory was 50.4MB in the beginning and 50.3MB in the end (delta: 47.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:14:08,415 INFO L158 Benchmark]: CACSL2BoogieTranslator took 929.62ms. Allocated memory was 96.5MB in the beginning and 132.1MB in the end (delta: 35.7MB). Free memory was 63.5MB in the beginning and 79.9MB in the end (delta: -16.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-03 02:14:08,416 INFO L158 Benchmark]: Boogie Procedure Inliner took 104.01ms. Allocated memory is still 132.1MB. Free memory was 79.9MB in the beginning and 74.1MB in the end (delta: 5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:14:08,416 INFO L158 Benchmark]: Boogie Preprocessor took 127.81ms. Allocated memory is still 132.1MB. Free memory was 74.1MB in the beginning and 102.9MB in the end (delta: -28.8MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. [2022-11-03 02:14:08,417 INFO L158 Benchmark]: RCFGBuilder took 2004.04ms. Allocated memory was 132.1MB in the beginning and 174.1MB in the end (delta: 41.9MB). Free memory was 102.9MB in the beginning and 113.8MB in the end (delta: -10.9MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. [2022-11-03 02:14:08,418 INFO L158 Benchmark]: TraceAbstraction took 53240.06ms. Allocated memory was 174.1MB in the beginning and 486.5MB in the end (delta: 312.5MB). Free memory was 112.8MB in the beginning and 430.2MB in the end (delta: -317.4MB). Peak memory consumption was 273.4MB. Max. memory is 16.1GB. [2022-11-03 02:14:08,421 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 96.5MB. Free memory was 50.4MB in the beginning and 50.3MB in the end (delta: 47.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 929.62ms. Allocated memory was 96.5MB in the beginning and 132.1MB in the end (delta: 35.7MB). Free memory was 63.5MB in the beginning and 79.9MB in the end (delta: -16.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 104.01ms. Allocated memory is still 132.1MB. Free memory was 79.9MB in the beginning and 74.1MB in the end (delta: 5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 127.81ms. Allocated memory is still 132.1MB. Free memory was 74.1MB in the beginning and 102.9MB in the end (delta: -28.8MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. * RCFGBuilder took 2004.04ms. Allocated memory was 132.1MB in the beginning and 174.1MB in the end (delta: 41.9MB). Free memory was 102.9MB in the beginning and 113.8MB in the end (delta: -10.9MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. * TraceAbstraction took 53240.06ms. Allocated memory was 174.1MB in the beginning and 486.5MB in the end (delta: 312.5MB). Free memory was 112.8MB in the beginning and 430.2MB in the end (delta: -317.4MB). Peak memory consumption was 273.4MB. 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 02:14:08,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/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 bad89116a36bb46e02a3fc807805b2b6d03550190d8073d361f25c2754b15f25 --- 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 02:14:10,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:14:10,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:14:10,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:14:10,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:14:10,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:14:10,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:14:10,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:14:10,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:14:10,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:14:10,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:14:10,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:14:10,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:14:10,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:14:10,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:14:10,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:14:10,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:14:10,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:14:10,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:14:10,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:14:10,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:14:10,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:14:10,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:14:10,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:14:10,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:14:10,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:14:10,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:14:10,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:14:10,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:14:10,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:14:10,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:14:10,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:14:10,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:14:10,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:14:10,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:14:10,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:14:10,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:14:10,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:14:10,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:14:10,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:14:10,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:14:10,793 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:14:10,822 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:14:10,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:14:10,822 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:14:10,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:14:10,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:14:10,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:14:10,824 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:14:10,824 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:14:10,825 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:14:10,825 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:14:10,825 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:14:10,826 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:14:10,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:14:10,827 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:14:10,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:14:10,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:14:10,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:14:10,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:14:10,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:14:10,828 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:14:10,829 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:14:10,829 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:14:10,829 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:14:10,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:14:10,830 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:14:10,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:14:10,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:14:10,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:14:10,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:14:10,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:14:10,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:14:10,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:14:10,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:14:10,834 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:14:10,835 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:10,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:14:10,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:14:10,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:14:10,837 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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bad89116a36bb46e02a3fc807805b2b6d03550190d8073d361f25c2754b15f25 [2022-11-03 02:14:11,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:14:11,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:14:11,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:14:11,232 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:14:11,233 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:14:11,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec6_product31.cil.c [2022-11-03 02:14:11,322 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/data/384778fd0/14023920e7774211acc203fcb99fa4d4/FLAG3daeb1e9c [2022-11-03 02:14:12,053 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:14:12,054 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/sv-benchmarks/c/product-lines/email_spec6_product31.cil.c [2022-11-03 02:14:12,073 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/data/384778fd0/14023920e7774211acc203fcb99fa4d4/FLAG3daeb1e9c [2022-11-03 02:14:12,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/data/384778fd0/14023920e7774211acc203fcb99fa4d4 [2022-11-03 02:14:12,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:14:12,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:14:12,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:14:12,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:14:12,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:14:12,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:14:12" (1/1) ... [2022-11-03 02:14:12,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1647215e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:12, skipping insertion in model container [2022-11-03 02:14:12,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:14:12" (1/1) ... [2022-11-03 02:14:12,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:14:12,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:14:12,826 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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/sv-benchmarks/c/product-lines/email_spec6_product31.cil.c[31008,31021] [2022-11-03 02:14:13,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:13,027 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:14:13,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:14:13,101 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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/sv-benchmarks/c/product-lines/email_spec6_product31.cil.c[31008,31021] [2022-11-03 02:14:13,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:13,159 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:14:13,196 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_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/sv-benchmarks/c/product-lines/email_spec6_product31.cil.c[31008,31021] [2022-11-03 02:14:13,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:13,277 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:14:13,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13 WrapperNode [2022-11-03 02:14:13,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:14:13,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:14:13,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:14:13,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:14:13,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,407 INFO L138 Inliner]: procedures = 134, calls = 225, calls flagged for inlining = 62, calls inlined = 57, statements flattened = 985 [2022-11-03 02:14:13,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:14:13,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:14:13,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:14:13,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:14:13,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,475 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:14:13,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:14:13,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:14:13,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:14:13,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (1/1) ... [2022-11-03 02:14:13,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:14:13,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:13,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:14:13,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:14:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 02:14:13,574 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 02:14:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-03 02:14:13,574 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-03 02:14:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-03 02:14:13,575 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-03 02:14:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 02:14:13,575 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 02:14:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 02:14:13,576 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 02:14:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 02:14:13,576 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 02:14:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 02:14:13,577 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 02:14:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-03 02:14:13,577 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-03 02:14:13,578 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 02:14:13,578 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 02:14:13,578 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 02:14:13,578 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 02:14:13,578 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 02:14:13,579 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 02:14:13,579 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 02:14:13,579 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 02:14:13,579 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 02:14:13,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:14:13,580 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 02:14:13,580 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 02:14:13,580 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-03 02:14:13,580 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-03 02:14:13,580 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 02:14:13,581 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 02:14:13,581 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 02:14:13,581 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 02:14:13,581 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 02:14:13,582 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 02:14:13,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:14:13,582 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 02:14:13,582 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 02:14:13,582 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 02:14:13,582 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 02:14:13,582 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-03 02:14:13,583 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-03 02:14:13,583 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 02:14:13,583 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 02:14:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 02:14:13,585 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 02:14:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 02:14:13,586 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 02:14:13,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:14:13,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:14:13,894 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:14:13,896 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:14:15,065 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:14:15,082 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:14:15,083 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:14:15,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:14:15 BoogieIcfgContainer [2022-11-03 02:14:15,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:14:15,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:14:15,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:14:15,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:14:15,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:14:12" (1/3) ... [2022-11-03 02:14:15,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be8bfde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:14:15, skipping insertion in model container [2022-11-03 02:14:15,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:13" (2/3) ... [2022-11-03 02:14:15,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be8bfde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:14:15, skipping insertion in model container [2022-11-03 02:14:15,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:14:15" (3/3) ... [2022-11-03 02:14:15,097 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec6_product31.cil.c [2022-11-03 02:14:15,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:14:15,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:14:15,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:14:15,235 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;@7e0ad3e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:14:15,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:14:15,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 288 states have (on average 1.4965277777777777) internal successors, (431), 292 states have internal predecessors, (431), 61 states have call successors, (61), 23 states have call predecessors, (61), 23 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-11-03 02:14:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:14:15,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:15,288 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 02:14:15,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash -937278279, now seen corresponding path program 1 times [2022-11-03 02:14:15,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:15,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904394925] [2022-11-03 02:14:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:15,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:15,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:15,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:15,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:14:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:14:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:14:15,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:15,832 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:15,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904394925] [2022-11-03 02:14:15,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904394925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:15,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:15,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:14:15,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456302469] [2022-11-03 02:14:15,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:15,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:14:15,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:14:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:14:15,871 INFO L87 Difference]: Start difference. First operand has 374 states, 288 states have (on average 1.4965277777777777) internal successors, (431), 292 states have internal predecessors, (431), 61 states have call successors, (61), 23 states have call predecessors, (61), 23 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Second operand has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:15,932 INFO L93 Difference]: Finished difference Result 594 states and 860 transitions. [2022-11-03 02:14:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:14:15,934 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 126 [2022-11-03 02:14:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:15,948 INFO L225 Difference]: With dead ends: 594 [2022-11-03 02:14:15,948 INFO L226 Difference]: Without dead ends: 367 [2022-11-03 02:14:15,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 125 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 02:14:15,958 INFO L413 NwaCegarLoop]: 549 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, 549 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 02:14:15,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-03 02:14:16,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2022-11-03 02:14:16,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 282 states have (on average 1.4893617021276595) internal successors, (420), 285 states have internal predecessors, (420), 61 states have call successors, (61), 23 states have call predecessors, (61), 23 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-11-03 02:14:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 541 transitions. [2022-11-03 02:14:16,028 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 541 transitions. Word has length 126 [2022-11-03 02:14:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:16,030 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 541 transitions. [2022-11-03 02:14:16,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 541 transitions. [2022-11-03 02:14:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 02:14:16,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:16,036 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 02:14:16,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:16,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:16,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:16,254 INFO L85 PathProgramCache]: Analyzing trace with hash -337301568, now seen corresponding path program 1 times [2022-11-03 02:14:16,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:16,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308677857] [2022-11-03 02:14:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:16,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:16,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:16,257 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:16,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:14:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:16,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:14:16,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:14:16,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:16,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:16,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308677857] [2022-11-03 02:14:16,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308677857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:16,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:16,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:16,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357744988] [2022-11-03 02:14:16,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:16,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:16,770 INFO L87 Difference]: Start difference. First operand 367 states and 541 transitions. Second operand has 5 states, 4 states have (on average 19.75) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:16,963 INFO L93 Difference]: Finished difference Result 725 states and 1072 transitions. [2022-11-03 02:14:16,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:16,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 19.75) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 127 [2022-11-03 02:14:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:16,968 INFO L225 Difference]: With dead ends: 725 [2022-11-03 02:14:16,976 INFO L226 Difference]: Without dead ends: 369 [2022-11-03 02:14:16,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 02:14:16,979 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 125 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1983 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:16,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1983 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-03 02:14:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2022-11-03 02:14:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 283 states have (on average 1.4876325088339222) internal successors, (421), 287 states have internal predecessors, (421), 61 states have call successors, (61), 23 states have call predecessors, (61), 24 states have return successors, (62), 60 states have call predecessors, (62), 60 states have call successors, (62) [2022-11-03 02:14:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 544 transitions. [2022-11-03 02:14:17,030 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 544 transitions. Word has length 127 [2022-11-03 02:14:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:17,032 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 544 transitions. [2022-11-03 02:14:17,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 19.75) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 544 transitions. [2022-11-03 02:14:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 02:14:17,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:17,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:17,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:17,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:17,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1052567231, now seen corresponding path program 1 times [2022-11-03 02:14:17,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:17,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118735553] [2022-11-03 02:14:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:17,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:17,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:17,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:17,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:14:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:17,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:14:17,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:14:17,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:17,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:17,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118735553] [2022-11-03 02:14:17,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118735553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:17,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:17,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:17,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133191901] [2022-11-03 02:14:17,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:17,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:17,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:17,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:17,694 INFO L87 Difference]: Start difference. First operand 369 states and 544 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:17,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:17,860 INFO L93 Difference]: Finished difference Result 727 states and 1076 transitions. [2022-11-03 02:14:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:17,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 128 [2022-11-03 02:14:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:17,864 INFO L225 Difference]: With dead ends: 727 [2022-11-03 02:14:17,867 INFO L226 Difference]: Without dead ends: 371 [2022-11-03 02:14:17,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 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 02:14:17,872 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 124 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1972 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 02:14:17,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1972 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:14:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-03 02:14:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-11-03 02:14:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 284 states have (on average 1.4859154929577465) internal successors, (422), 289 states have internal predecessors, (422), 61 states have call successors, (61), 23 states have call predecessors, (61), 25 states have return successors, (66), 60 states have call predecessors, (66), 60 states have call successors, (66) [2022-11-03 02:14:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 549 transitions. [2022-11-03 02:14:17,930 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 549 transitions. Word has length 128 [2022-11-03 02:14:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:17,931 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 549 transitions. [2022-11-03 02:14:17,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 549 transitions. [2022-11-03 02:14:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:14:17,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:17,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:17,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:18,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:18,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:18,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash 437617665, now seen corresponding path program 1 times [2022-11-03 02:14:18,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:18,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163014862] [2022-11-03 02:14:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:18,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:18,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:18,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:18,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:14:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:18,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:14:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:14:18,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:18,536 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:18,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163014862] [2022-11-03 02:14:18,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163014862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:18,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:18,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291237191] [2022-11-03 02:14:18,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:18,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:18,539 INFO L87 Difference]: Start difference. First operand 371 states and 549 transitions. Second operand has 5 states, 4 states have (on average 20.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:18,642 INFO L93 Difference]: Finished difference Result 719 states and 1066 transitions. [2022-11-03 02:14:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 129 [2022-11-03 02:14:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:18,646 INFO L225 Difference]: With dead ends: 719 [2022-11-03 02:14:18,647 INFO L226 Difference]: Without dead ends: 371 [2022-11-03 02:14:18,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 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 02:14:18,649 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 123 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1986 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 02:14:18,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1986 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-03 02:14:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-11-03 02:14:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 284 states have (on average 1.4859154929577465) internal successors, (422), 289 states have internal predecessors, (422), 61 states have call successors, (61), 23 states have call predecessors, (61), 25 states have return successors, (65), 60 states have call predecessors, (65), 60 states have call successors, (65) [2022-11-03 02:14:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 548 transitions. [2022-11-03 02:14:18,694 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 548 transitions. Word has length 129 [2022-11-03 02:14:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:18,696 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 548 transitions. [2022-11-03 02:14:18,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 548 transitions. [2022-11-03 02:14:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:14:18,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:18,702 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:18,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:18,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:18,919 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1315007650, now seen corresponding path program 2 times [2022-11-03 02:14:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:18,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637252684] [2022-11-03 02:14:18,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:14:18,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:18,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:18,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:18,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:14:19,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-03 02:14:19,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:14:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:19,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:14:19,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:19,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:19,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637252684] [2022-11-03 02:14:19,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637252684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:19,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:19,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:14:19,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141321177] [2022-11-03 02:14:19,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:19,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:19,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:19,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:19,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:19,224 INFO L87 Difference]: Start difference. First operand 371 states and 548 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:19,257 INFO L93 Difference]: Finished difference Result 588 states and 848 transitions. [2022-11-03 02:14:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:19,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 130 [2022-11-03 02:14:19,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:19,261 INFO L225 Difference]: With dead ends: 588 [2022-11-03 02:14:19,261 INFO L226 Difference]: Without dead ends: 374 [2022-11-03 02:14:19,262 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 02:14:19,263 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 1 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1076 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 02:14:19,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1076 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:19,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-03 02:14:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 373. [2022-11-03 02:14:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 286 states have (on average 1.4825174825174825) internal successors, (424), 291 states have internal predecessors, (424), 61 states have call successors, (61), 23 states have call predecessors, (61), 25 states have return successors, (65), 60 states have call predecessors, (65), 60 states have call successors, (65) [2022-11-03 02:14:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 550 transitions. [2022-11-03 02:14:19,288 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 550 transitions. Word has length 130 [2022-11-03 02:14:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:19,289 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 550 transitions. [2022-11-03 02:14:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 550 transitions. [2022-11-03 02:14:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 02:14:19,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:19,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:19,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:19,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:19,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash 200202933, now seen corresponding path program 1 times [2022-11-03 02:14:19,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:19,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848203906] [2022-11-03 02:14:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:19,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:19,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:19,515 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:19,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:14:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:19,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:14:19,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:14:19,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:19,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:19,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848203906] [2022-11-03 02:14:19,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848203906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:19,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:19,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:19,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990639488] [2022-11-03 02:14:19,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:19,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:19,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:19,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:19,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:19,936 INFO L87 Difference]: Start difference. First operand 373 states and 550 transitions. Second operand has 5 states, 4 states have (on average 21.5) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:20,022 INFO L93 Difference]: Finished difference Result 725 states and 1073 transitions. [2022-11-03 02:14:20,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:20,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 21.5) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 136 [2022-11-03 02:14:20,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:20,026 INFO L225 Difference]: With dead ends: 725 [2022-11-03 02:14:20,026 INFO L226 Difference]: Without dead ends: 375 [2022-11-03 02:14:20,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 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 02:14:20,029 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 121 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1988 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 02:14:20,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1988 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-03 02:14:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2022-11-03 02:14:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 287 states have (on average 1.480836236933798) internal successors, (425), 293 states have internal predecessors, (425), 61 states have call successors, (61), 23 states have call predecessors, (61), 26 states have return successors, (67), 60 states have call predecessors, (67), 60 states have call successors, (67) [2022-11-03 02:14:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 553 transitions. [2022-11-03 02:14:20,053 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 553 transitions. Word has length 136 [2022-11-03 02:14:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:20,054 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 553 transitions. [2022-11-03 02:14:20,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 21.5) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 553 transitions. [2022-11-03 02:14:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:14:20,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:20,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:20,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:20,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:20,260 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:20,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:20,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1139585597, now seen corresponding path program 1 times [2022-11-03 02:14:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:20,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507175719] [2022-11-03 02:14:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:20,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:20,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:20,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:20,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:14:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:14:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:14:20,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:20,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:20,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507175719] [2022-11-03 02:14:20,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507175719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:20,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:20,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:20,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997961307] [2022-11-03 02:14:20,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:20,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:20,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:20,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:20,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:20,626 INFO L87 Difference]: Start difference. First operand 375 states and 553 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:20,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:20,720 INFO L93 Difference]: Finished difference Result 723 states and 1068 transitions. [2022-11-03 02:14:20,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 137 [2022-11-03 02:14:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:20,724 INFO L225 Difference]: With dead ends: 723 [2022-11-03 02:14:20,724 INFO L226 Difference]: Without dead ends: 375 [2022-11-03 02:14:20,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 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 02:14:20,726 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 122 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1975 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 02:14:20,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1975 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:14:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-03 02:14:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2022-11-03 02:14:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 287 states have (on average 1.480836236933798) internal successors, (425), 293 states have internal predecessors, (425), 61 states have call successors, (61), 23 states have call predecessors, (61), 26 states have return successors, (66), 60 states have call predecessors, (66), 60 states have call successors, (66) [2022-11-03 02:14:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 552 transitions. [2022-11-03 02:14:20,752 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 552 transitions. Word has length 137 [2022-11-03 02:14:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:20,753 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 552 transitions. [2022-11-03 02:14:20,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 552 transitions. [2022-11-03 02:14:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-03 02:14:20,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:20,756 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:20,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:20,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:20,973 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:20,973 INFO L85 PathProgramCache]: Analyzing trace with hash -405148659, now seen corresponding path program 2 times [2022-11-03 02:14:20,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:20,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040338382] [2022-11-03 02:14:20,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:14:20,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:20,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:20,975 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:20,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:14:21,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:14:21,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:14:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:14:21,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:14:21,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:21,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:21,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040338382] [2022-11-03 02:14:21,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040338382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:21,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:21,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:21,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787239794] [2022-11-03 02:14:21,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:21,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:21,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:21,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:21,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:21,374 INFO L87 Difference]: Start difference. First operand 375 states and 552 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:21,502 INFO L93 Difference]: Finished difference Result 725 states and 1073 transitions. [2022-11-03 02:14:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 138 [2022-11-03 02:14:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:21,506 INFO L225 Difference]: With dead ends: 725 [2022-11-03 02:14:21,506 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 02:14:21,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 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 02:14:21,512 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 120 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1977 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 02:14:21,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1977 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:14:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 02:14:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-11-03 02:14:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 288 states have (on average 1.4791666666666667) internal successors, (426), 295 states have internal predecessors, (426), 61 states have call successors, (61), 23 states have call predecessors, (61), 27 states have return successors, (70), 60 states have call predecessors, (70), 60 states have call successors, (70) [2022-11-03 02:14:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 557 transitions. [2022-11-03 02:14:21,548 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 557 transitions. Word has length 138 [2022-11-03 02:14:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:21,548 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 557 transitions. [2022-11-03 02:14:21,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:14:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 557 transitions. [2022-11-03 02:14:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 02:14:21,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:21,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:21,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:21,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:21,768 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1963774590, now seen corresponding path program 1 times [2022-11-03 02:14:21,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:21,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284102351] [2022-11-03 02:14:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:21,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:21,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:21,771 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:21,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:14:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:22,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:14:22,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:22,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:22,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284102351] [2022-11-03 02:14:22,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284102351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:22,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:22,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:14:22,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910905133] [2022-11-03 02:14:22,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:22,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:22,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:22,180 INFO L87 Difference]: Start difference. First operand 377 states and 557 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:22,225 INFO L93 Difference]: Finished difference Result 780 states and 1167 transitions. [2022-11-03 02:14:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:22,226 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 139 [2022-11-03 02:14:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:22,229 INFO L225 Difference]: With dead ends: 780 [2022-11-03 02:14:22,230 INFO L226 Difference]: Without dead ends: 434 [2022-11-03 02:14:22,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:22,232 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 107 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1057 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 02:14:22,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1057 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-03 02:14:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 426. [2022-11-03 02:14:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 326 states have (on average 1.4969325153374233) internal successors, (488), 333 states have internal predecessors, (488), 72 states have call successors, (72), 23 states have call predecessors, (72), 27 states have return successors, (83), 71 states have call predecessors, (83), 71 states have call successors, (83) [2022-11-03 02:14:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 643 transitions. [2022-11-03 02:14:22,269 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 643 transitions. Word has length 139 [2022-11-03 02:14:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:22,269 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 643 transitions. [2022-11-03 02:14:22,270 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 643 transitions. [2022-11-03 02:14:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:14:22,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:22,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:22,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:22,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:22,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash -903691641, now seen corresponding path program 1 times [2022-11-03 02:14:22,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:22,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460157824] [2022-11-03 02:14:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:22,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:22,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:22,492 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:22,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:14:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:22,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:14:22,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:14:22,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:14:23,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:23,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460157824] [2022-11-03 02:14:23,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460157824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:23,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [669261102] [2022-11-03 02:14:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:23,018 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:23,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:23,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:23,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:14:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:23,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:14:23,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:14:23,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:14:24,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [669261102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:24,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359244657] [2022-11-03 02:14:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:24,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:24,118 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:24,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:14:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:24,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:14:24,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:14:24,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:14:24,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359244657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:24,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:14:24,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 9, 9, 9, 9] total 20 [2022-11-03 02:14:24,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607322961] [2022-11-03 02:14:24,823 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:14:24,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:14:24,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:24,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:14:24,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:14:24,826 INFO L87 Difference]: Start difference. First operand 426 states and 643 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, (48), 6 states have call predecessors, (48), 9 states have return successors, (44), 6 states have call predecessors, (44), 4 states have call successors, (44) [2022-11-03 02:14:39,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:39,518 INFO L93 Difference]: Finished difference Result 2464 states and 3961 transitions. [2022-11-03 02:14:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:14:39,519 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, (48), 6 states have call predecessors, (48), 9 states have return successors, (44), 6 states have call predecessors, (44), 4 states have call successors, (44) Word has length 140 [2022-11-03 02:14:39,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:39,543 INFO L225 Difference]: With dead ends: 2464 [2022-11-03 02:14:39,543 INFO L226 Difference]: Without dead ends: 2248 [2022-11-03 02:14:39,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:14:39,551 INFO L413 NwaCegarLoop]: 1196 mSDtfsCounter, 3024 mSDsluCounter, 6839 mSDsCounter, 0 mSdLazyCounter, 10505 mSolverCounterSat, 1010 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3110 SdHoareTripleChecker+Valid, 8035 SdHoareTripleChecker+Invalid, 11515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1010 IncrementalHoareTripleChecker+Valid, 10505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:39,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3110 Valid, 8035 Invalid, 11515 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1010 Valid, 10505 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2022-11-03 02:14:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2022-11-03 02:14:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1505. [2022-11-03 02:14:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1179 states have (on average 1.57167090754877) internal successors, (1853), 1190 states have internal predecessors, (1853), 270 states have call successors, (270), 47 states have call predecessors, (270), 55 states have return successors, (337), 271 states have call predecessors, (337), 268 states have call successors, (337) [2022-11-03 02:14:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2460 transitions. [2022-11-03 02:14:39,835 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2460 transitions. Word has length 140 [2022-11-03 02:14:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:39,836 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2460 transitions. [2022-11-03 02:14:39,836 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, (48), 6 states have call predecessors, (48), 9 states have return successors, (44), 6 states have call predecessors, (44), 4 states have call successors, (44) [2022-11-03 02:14:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2460 transitions. [2022-11-03 02:14:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 02:14:39,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:39,845 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:39,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:40,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:40,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:40,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:40,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1103752410, now seen corresponding path program 1 times [2022-11-03 02:14:40,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:40,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295865486] [2022-11-03 02:14:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:40,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:40,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:40,464 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:40,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:14:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:14:40,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:40,810 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:40,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295865486] [2022-11-03 02:14:40,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295865486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:40,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:40,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:14:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896980524] [2022-11-03 02:14:40,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:40,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:40,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:40,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:40,813 INFO L87 Difference]: Start difference. First operand 1505 states and 2460 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:41,139 INFO L93 Difference]: Finished difference Result 3551 states and 5902 transitions. [2022-11-03 02:14:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:41,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 147 [2022-11-03 02:14:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:41,156 INFO L225 Difference]: With dead ends: 3551 [2022-11-03 02:14:41,156 INFO L226 Difference]: Without dead ends: 2171 [2022-11-03 02:14:41,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:41,163 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 105 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1105 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 02:14:41,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1105 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-11-03 02:14:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2155. [2022-11-03 02:14:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 1701 states have (on average 1.5890652557319225) internal successors, (2703), 1712 states have internal predecessors, (2703), 398 states have call successors, (398), 47 states have call predecessors, (398), 55 states have return successors, (505), 399 states have call predecessors, (505), 396 states have call successors, (505) [2022-11-03 02:14:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 3606 transitions. [2022-11-03 02:14:41,508 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 3606 transitions. Word has length 147 [2022-11-03 02:14:41,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:41,509 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 3606 transitions. [2022-11-03 02:14:41,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 3606 transitions. [2022-11-03 02:14:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-03 02:14:41,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:41,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:41,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:41,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:41,740 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:41,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:41,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1089250206, now seen corresponding path program 1 times [2022-11-03 02:14:41,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:41,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071637414] [2022-11-03 02:14:41,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:41,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:41,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:41,743 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:41,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:14:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:42,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:14:42,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:42,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:42,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071637414] [2022-11-03 02:14:42,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071637414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:42,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:42,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:14:42,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874112730] [2022-11-03 02:14:42,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:42,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:42,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:42,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:42,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:42,091 INFO L87 Difference]: Start difference. First operand 2155 states and 3606 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:42,507 INFO L93 Difference]: Finished difference Result 5111 states and 8620 transitions. [2022-11-03 02:14:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 148 [2022-11-03 02:14:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:42,526 INFO L225 Difference]: With dead ends: 5111 [2022-11-03 02:14:42,526 INFO L226 Difference]: Without dead ends: 3187 [2022-11-03 02:14:42,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:42,535 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 103 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1095 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 02:14:42,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1095 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2022-11-03 02:14:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3171. [2022-11-03 02:14:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 2527 states have (on average 1.6007123070834983) internal successors, (4045), 2538 states have internal predecessors, (4045), 588 states have call successors, (588), 47 states have call predecessors, (588), 55 states have return successors, (727), 589 states have call predecessors, (727), 586 states have call successors, (727) [2022-11-03 02:14:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 5360 transitions. [2022-11-03 02:14:43,033 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 5360 transitions. Word has length 148 [2022-11-03 02:14:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:43,035 INFO L495 AbstractCegarLoop]: Abstraction has 3171 states and 5360 transitions. [2022-11-03 02:14:43,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:43,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 5360 transitions. [2022-11-03 02:14:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-03 02:14:43,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:43,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:43,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:43,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:43,282 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:43,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1288350660, now seen corresponding path program 1 times [2022-11-03 02:14:43,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:43,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926113566] [2022-11-03 02:14:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:43,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:43,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:43,283 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:43,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:14:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:43,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:14:43,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:43,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:43,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926113566] [2022-11-03 02:14:43,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926113566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:43,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:43,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:14:43,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062247273] [2022-11-03 02:14:43,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:43,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:43,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:43,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:43,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:43,605 INFO L87 Difference]: Start difference. First operand 3171 states and 5360 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:44,199 INFO L93 Difference]: Finished difference Result 7415 states and 12654 transitions. [2022-11-03 02:14:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:44,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 149 [2022-11-03 02:14:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:44,225 INFO L225 Difference]: With dead ends: 7415 [2022-11-03 02:14:44,225 INFO L226 Difference]: Without dead ends: 4725 [2022-11-03 02:14:44,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:44,237 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 101 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1083 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 02:14:44,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1083 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4725 states. [2022-11-03 02:14:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4725 to 4709. [2022-11-03 02:14:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 3819 states have (on average 1.6095836606441476) internal successors, (6147), 3830 states have internal predecessors, (6147), 834 states have call successors, (834), 47 states have call predecessors, (834), 55 states have return successors, (1057), 835 states have call predecessors, (1057), 832 states have call successors, (1057) [2022-11-03 02:14:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 8038 transitions. [2022-11-03 02:14:45,185 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 8038 transitions. Word has length 149 [2022-11-03 02:14:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:45,185 INFO L495 AbstractCegarLoop]: Abstraction has 4709 states and 8038 transitions. [2022-11-03 02:14:45,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 8038 transitions. [2022-11-03 02:14:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-03 02:14:45,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:45,213 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:45,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:45,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:45,429 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:45,429 INFO L85 PathProgramCache]: Analyzing trace with hash -918707581, now seen corresponding path program 1 times [2022-11-03 02:14:45,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:45,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219647422] [2022-11-03 02:14:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:45,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:45,432 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:45,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:14:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:45,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:14:45,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:45,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:45,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219647422] [2022-11-03 02:14:45,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219647422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:45,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:45,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:14:45,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825894270] [2022-11-03 02:14:45,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:45,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:45,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:45,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:45,742 INFO L87 Difference]: Start difference. First operand 4709 states and 8038 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:46,568 INFO L93 Difference]: Finished difference Result 11003 states and 18948 transitions. [2022-11-03 02:14:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 150 [2022-11-03 02:14:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:46,610 INFO L225 Difference]: With dead ends: 11003 [2022-11-03 02:14:46,610 INFO L226 Difference]: Without dead ends: 7183 [2022-11-03 02:14:46,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:46,624 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 99 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1083 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 02:14:46,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1083 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7183 states. [2022-11-03 02:14:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7183 to 7167. [2022-11-03 02:14:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 5919 states have (on average 1.6153066396350735) internal successors, (9561), 5930 states have internal predecessors, (9561), 1192 states have call successors, (1192), 47 states have call predecessors, (1192), 55 states have return successors, (1555), 1193 states have call predecessors, (1555), 1190 states have call successors, (1555) [2022-11-03 02:14:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 12308 transitions. [2022-11-03 02:14:47,982 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 12308 transitions. Word has length 150 [2022-11-03 02:14:47,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:47,983 INFO L495 AbstractCegarLoop]: Abstraction has 7167 states and 12308 transitions. [2022-11-03 02:14:47,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 12308 transitions. [2022-11-03 02:14:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 02:14:48,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:48,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:48,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:48,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:48,246 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:48,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:48,246 INFO L85 PathProgramCache]: Analyzing trace with hash 733093944, now seen corresponding path program 1 times [2022-11-03 02:14:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:48,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172157439] [2022-11-03 02:14:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:48,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:48,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:48,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:48,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:14:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:48,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:14:48,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:48,568 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:48,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172157439] [2022-11-03 02:14:48,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172157439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:48,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:48,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:14:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63072558] [2022-11-03 02:14:48,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:48,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:48,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:48,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:48,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:48,573 INFO L87 Difference]: Start difference. First operand 7167 states and 12308 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:49,559 INFO L93 Difference]: Finished difference Result 16899 states and 29286 transitions. [2022-11-03 02:14:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:49,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 151 [2022-11-03 02:14:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:49,612 INFO L225 Difference]: With dead ends: 16899 [2022-11-03 02:14:49,613 INFO L226 Difference]: Without dead ends: 11245 [2022-11-03 02:14:49,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:49,634 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 97 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1093 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 02:14:49,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1093 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11245 states. [2022-11-03 02:14:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11245 to 11229. [2022-11-03 02:14:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11229 states, 9229 states have (on average 1.6106837143785893) internal successors, (14865), 9240 states have internal predecessors, (14865), 1944 states have call successors, (1944), 47 states have call predecessors, (1944), 55 states have return successors, (2551), 1945 states have call predecessors, (2551), 1942 states have call successors, (2551) [2022-11-03 02:14:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11229 states to 11229 states and 19360 transitions. [2022-11-03 02:14:51,626 INFO L78 Accepts]: Start accepts. Automaton has 11229 states and 19360 transitions. Word has length 151 [2022-11-03 02:14:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:51,626 INFO L495 AbstractCegarLoop]: Abstraction has 11229 states and 19360 transitions. [2022-11-03 02:14:51,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 11229 states and 19360 transitions. [2022-11-03 02:14:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 02:14:51,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:51,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:51,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:51,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:51,893 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:51,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:51,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1163951481, now seen corresponding path program 1 times [2022-11-03 02:14:51,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:51,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135427847] [2022-11-03 02:14:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:51,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:51,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:51,896 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:51,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:14:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:52,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:52,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:14:52,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:52,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:52,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135427847] [2022-11-03 02:14:52,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135427847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:52,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:52,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:14:52,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313502093] [2022-11-03 02:14:52,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:52,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:52,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:52,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:52,297 INFO L87 Difference]: Start difference. First operand 11229 states and 19360 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:53,993 INFO L93 Difference]: Finished difference Result 27573 states and 47762 transitions. [2022-11-03 02:14:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:53,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 152 [2022-11-03 02:14:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:54,071 INFO L225 Difference]: With dead ends: 27573 [2022-11-03 02:14:54,071 INFO L226 Difference]: Without dead ends: 18611 [2022-11-03 02:14:54,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:54,100 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 95 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1088 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 02:14:54,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1088 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:54,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18611 states. [2022-11-03 02:14:56,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18611 to 18595. [2022-11-03 02:14:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18595 states, 15383 states have (on average 1.609373984268348) internal successors, (24757), 15394 states have internal predecessors, (24757), 3156 states have call successors, (3156), 47 states have call predecessors, (3156), 55 states have return successors, (4063), 3157 states have call predecessors, (4063), 3154 states have call successors, (4063) [2022-11-03 02:14:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18595 states to 18595 states and 31976 transitions. [2022-11-03 02:14:56,993 INFO L78 Accepts]: Start accepts. Automaton has 18595 states and 31976 transitions. Word has length 152 [2022-11-03 02:14:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:56,994 INFO L495 AbstractCegarLoop]: Abstraction has 18595 states and 31976 transitions. [2022-11-03 02:14:56,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:14:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 18595 states and 31976 transitions. [2022-11-03 02:14:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:14:57,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:57,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:57,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:57,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:57,273 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:57,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:57,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1608220646, now seen corresponding path program 1 times [2022-11-03 02:14:57,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:57,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569758366] [2022-11-03 02:14:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:57,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:57,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:57,276 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:57,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55384d7-5aa2-44fc-a1a0-bd7b1bbb4e71/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:14:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:57,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:57,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:14:57,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:57,674 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:57,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569758366] [2022-11-03 02:14:57,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569758366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:57,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:57,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:14:57,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41360220] [2022-11-03 02:14:57,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:57,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:57,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:57,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:57,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:57,677 INFO L87 Difference]: Start difference. First operand 18595 states and 31976 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:15:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:01,260 INFO L93 Difference]: Finished difference Result 47941 states and 82854 transitions. [2022-11-03 02:15:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:01,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 153 [2022-11-03 02:15:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:01,403 INFO L225 Difference]: With dead ends: 47941 [2022-11-03 02:15:01,403 INFO L226 Difference]: Without dead ends: 32517 [2022-11-03 02:15:01,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:15:01,449 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 93 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1103 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 02:15:01,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1103 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:01,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32517 states.