./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product33.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/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_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/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_783131b4-a5fb-4d79-a251-ea53118faafb/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 f1bf577a04d9efa22571cde3b0a4348a8cf7d4cfe89b0abb5b80fa76df1bbd4f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:28:20,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:28:20,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:28:20,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:28:20,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:28:20,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:28:20,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:28:20,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:28:20,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:28:20,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:28:20,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:28:20,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:28:20,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:28:20,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:28:20,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:28:20,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:28:20,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:28:20,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:28:20,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:28:20,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:28:20,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:28:20,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:28:20,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:28:20,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:28:20,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:28:20,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:28:20,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:28:20,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:28:20,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:28:20,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:28:20,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:28:20,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:28:20,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:28:20,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:28:20,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:28:20,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:28:20,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:28:20,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:28:20,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:28:20,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:28:20,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:28:20,606 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:28:20,643 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:28:20,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:28:20,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:28:20,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:28:20,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:28:20,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:28:20,646 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:28:20,647 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:28:20,647 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:28:20,647 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:28:20,648 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:28:20,649 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:28:20,649 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:28:20,649 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:28:20,650 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:28:20,650 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:28:20,650 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:28:20,651 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:28:20,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:28:20,652 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:28:20,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:28:20,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:28:20,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:28:20,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:28:20,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:28:20,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:28:20,668 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:28:20,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:28:20,668 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:28:20,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:28:20,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:28:20,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:28:20,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:20,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:28:20,670 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:28:20,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:28:20,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:28:20,671 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:28:20,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:28:20,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:28:20,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:28:20,672 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_783131b4-a5fb-4d79-a251-ea53118faafb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1bf577a04d9efa22571cde3b0a4348a8cf7d4cfe89b0abb5b80fa76df1bbd4f [2022-11-03 03:28:20,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:28:20,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:28:20,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:28:20,983 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:28:20,984 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:28:20,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec7_product33.cil.c [2022-11-03 03:28:21,053 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/data/b79ac9043/5874a6abc77a4fb9b0baa746f4155b86/FLAG89c94d1b0 [2022-11-03 03:28:21,688 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:28:21,688 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/sv-benchmarks/c/product-lines/email_spec7_product33.cil.c [2022-11-03 03:28:21,730 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/data/b79ac9043/5874a6abc77a4fb9b0baa746f4155b86/FLAG89c94d1b0 [2022-11-03 03:28:21,937 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/data/b79ac9043/5874a6abc77a4fb9b0baa746f4155b86 [2022-11-03 03:28:21,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:28:21,941 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:28:21,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:21,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:28:21,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:28:21,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:21" (1/1) ... [2022-11-03 03:28:21,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64502dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:21, skipping insertion in model container [2022-11-03 03:28:21,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:21" (1/1) ... [2022-11-03 03:28:21,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:28:22,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:28:22,467 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_783131b4-a5fb-4d79-a251-ea53118faafb/sv-benchmarks/c/product-lines/email_spec7_product33.cil.c[20852,20865] [2022-11-03 03:28:22,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:22,701 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:28:22,772 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_783131b4-a5fb-4d79-a251-ea53118faafb/sv-benchmarks/c/product-lines/email_spec7_product33.cil.c[20852,20865] [2022-11-03 03:28:22,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:22,842 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:28:22,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22 WrapperNode [2022-11-03 03:28:22,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:22,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:22,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:28:22,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:28:22,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:22,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:23,026 INFO L138 Inliner]: procedures = 134, calls = 225, calls flagged for inlining = 65, calls inlined = 60, statements flattened = 1057 [2022-11-03 03:28:23,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:23,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:28:23,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:28:23,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:28:23,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:23,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:23,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:23,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:23,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:23,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:23,087 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:23,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:23,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:28:23,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:28:23,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:28:23,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:28:23,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (1/1) ... [2022-11-03 03:28:23,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:23,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:23,147 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:28:23,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:28:23,213 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 03:28:23,213 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 03:28:23,213 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-03 03:28:23,213 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-03 03:28:23,213 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-03 03:28:23,214 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-03 03:28:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 03:28:23,214 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 03:28:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 03:28:23,214 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 03:28:23,215 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 03:28:23,215 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 03:28:23,215 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 03:28:23,215 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 03:28:23,215 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-03 03:28:23,215 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-03 03:28:23,216 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 03:28:23,216 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 03:28:23,216 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 03:28:23,216 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 03:28:23,216 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 03:28:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 03:28:23,217 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 03:28:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2022-11-03 03:28:23,217 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2022-11-03 03:28:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 03:28:23,217 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 03:28:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:28:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 03:28:23,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 03:28:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-03 03:28:23,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-03 03:28:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 03:28:23,219 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 03:28:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 03:28:23,219 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 03:28:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 03:28:23,219 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 03:28:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 03:28:23,220 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 03:28:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 03:28:23,220 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 03:28:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-03 03:28:23,221 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-03 03:28:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 03:28:23,221 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 03:28:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 03:28:23,221 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 03:28:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:28:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 03:28:23,222 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 03:28:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:28:23,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:28:23,445 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:28:23,448 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:28:24,532 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:28:25,096 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:28:25,096 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:28:25,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:25 BoogieIcfgContainer [2022-11-03 03:28:25,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:28:25,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:28:25,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:28:25,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:28:25,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:28:21" (1/3) ... [2022-11-03 03:28:25,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d8b7d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:25, skipping insertion in model container [2022-11-03 03:28:25,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:22" (2/3) ... [2022-11-03 03:28:25,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d8b7d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:25, skipping insertion in model container [2022-11-03 03:28:25,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:25" (3/3) ... [2022-11-03 03:28:25,125 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec7_product33.cil.c [2022-11-03 03:28:25,145 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:28:25,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:28:25,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:28:25,246 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;@7710bd97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:28:25,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:28:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 209 states, 121 states have (on average 1.3057851239669422) internal successors, (158), 125 states have internal predecessors, (158), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-03 03:28:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:28:25,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:25,275 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] [2022-11-03 03:28:25,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:25,284 INFO L85 PathProgramCache]: Analyzing trace with hash -460361428, now seen corresponding path program 1 times [2022-11-03 03:28:25,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:25,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935125014] [2022-11-03 03:28:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:25,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:25,705 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 03:28:25,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:25,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935125014] [2022-11-03 03:28:25,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935125014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:25,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:25,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:28:25,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427323903] [2022-11-03 03:28:25,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:25,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:28:25,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:25,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:28:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:28:25,759 INFO L87 Difference]: Start difference. First operand has 209 states, 121 states have (on average 1.3057851239669422) internal successors, (158), 125 states have internal predecessors, (158), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:28:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:25,974 INFO L93 Difference]: Finished difference Result 335 states and 442 transitions. [2022-11-03 03:28:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:28:25,977 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 77 [2022-11-03 03:28:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:25,996 INFO L225 Difference]: With dead ends: 335 [2022-11-03 03:28:25,996 INFO L226 Difference]: Without dead ends: 206 [2022-11-03 03:28:26,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:28:26,019 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:26,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 239 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-03 03:28:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-11-03 03:28:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 122 states have internal predecessors, (152), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-11-03 03:28:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 275 transitions. [2022-11-03 03:28:26,120 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 275 transitions. Word has length 77 [2022-11-03 03:28:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:26,122 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 275 transitions. [2022-11-03 03:28:26,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:28:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 275 transitions. [2022-11-03 03:28:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 03:28:26,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:26,139 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] [2022-11-03 03:28:26,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:28:26,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:26,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1923992268, now seen corresponding path program 1 times [2022-11-03 03:28:26,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:26,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397544762] [2022-11-03 03:28:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:26,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:26,519 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 03:28:26,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:26,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397544762] [2022-11-03 03:28:26,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397544762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:26,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:26,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:26,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458805182] [2022-11-03 03:28:26,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:26,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:28:26,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:28:26,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:28:26,523 INFO L87 Difference]: Start difference. First operand 206 states and 275 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:28:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:26,660 INFO L93 Difference]: Finished difference Result 331 states and 430 transitions. [2022-11-03 03:28:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:28:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 78 [2022-11-03 03:28:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:26,670 INFO L225 Difference]: With dead ends: 331 [2022-11-03 03:28:26,670 INFO L226 Difference]: Without dead ends: 208 [2022-11-03 03:28:26,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:28:26,677 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 0 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:26,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 471 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-03 03:28:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-11-03 03:28:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 124 states have internal predecessors, (154), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-11-03 03:28:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 277 transitions. [2022-11-03 03:28:26,700 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 277 transitions. Word has length 78 [2022-11-03 03:28:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:26,700 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 277 transitions. [2022-11-03 03:28:26,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:28:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 277 transitions. [2022-11-03 03:28:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 03:28:26,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:26,704 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] [2022-11-03 03:28:26,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:28:26,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:26,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1111025042, now seen corresponding path program 1 times [2022-11-03 03:28:26,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:26,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978675298] [2022-11-03 03:28:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:26,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:26,826 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 03:28:26,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978675298] [2022-11-03 03:28:26,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978675298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:26,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:26,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:26,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139004943] [2022-11-03 03:28:26,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:26,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:28:26,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:28:26,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:28:26,829 INFO L87 Difference]: Start difference. First operand 208 states and 277 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:28:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:27,003 INFO L93 Difference]: Finished difference Result 446 states and 613 transitions. [2022-11-03 03:28:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:28:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 83 [2022-11-03 03:28:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:27,006 INFO L225 Difference]: With dead ends: 446 [2022-11-03 03:28:27,007 INFO L226 Difference]: Without dead ends: 256 [2022-11-03 03:28:27,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:28:27,009 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 57 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:27,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 485 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-03 03:28:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 251. [2022-11-03 03:28:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 153 states have (on average 1.3529411764705883) internal successors, (207), 156 states have internal predecessors, (207), 73 states have call successors, (73), 24 states have call predecessors, (73), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-03 03:28:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 352 transitions. [2022-11-03 03:28:27,030 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 352 transitions. Word has length 83 [2022-11-03 03:28:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:27,031 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 352 transitions. [2022-11-03 03:28:27,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:28:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 352 transitions. [2022-11-03 03:28:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 03:28:27,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:27,033 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] [2022-11-03 03:28:27,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:28:27,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash 309841505, now seen corresponding path program 1 times [2022-11-03 03:28:27,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:27,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677102218] [2022-11-03 03:28:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:27,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:27,295 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 03:28:27,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:27,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677102218] [2022-11-03 03:28:27,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677102218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788657120] [2022-11-03 03:28:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:27,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:27,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:27,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:27,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:28:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:28:27,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:27,788 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 03:28:27,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:27,917 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 03:28:27,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788657120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:27,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156192523] [2022-11-03 03:28:27,945 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 03:28:27,946 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:27,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:27,955 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:27,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:07,307 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-03 03:29:07,632 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-03 03:29:07,979 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 266 for LOIs [2022-11-03 03:29:10,333 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 236 for LOIs [2022-11-03 03:29:10,375 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 268 for LOIs [2022-11-03 03:29:39,033 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 250 for LOIs [2022-11-03 03:29:39,760 INFO L197 IcfgInterpreter]: Interpreting procedure isEncrypted with input of size 250 for LOIs [2022-11-03 03:29:39,813 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 451 for LOIs [2022-11-03 03:29:40,482 INFO L197 IcfgInterpreter]: Interpreting procedure findPublicKey with input of size 248 for LOIs [2022-11-03 03:29:40,559 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 422 for LOIs [2022-11-03 03:29:40,809 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 472 for LOIs [2022-11-03 03:29:42,856 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:00,865 WARN L234 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 444 DAG size of output: 244 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:30:07,079 WARN L234 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 467 DAG size of output: 264 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:30:40,574 WARN L234 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 508 DAG size of output: 293 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:30:54,261 WARN L234 SmtUtils]: Spent 12.13s on a formula simplification. DAG size of input: 591 DAG size of output: 346 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:31:06,431 WARN L234 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 562 DAG size of output: 373 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:31:11,955 WARN L234 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 564 DAG size of output: 328 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:31:37,312 WARN L234 SmtUtils]: Spent 13.98s on a formula simplification. DAG size of input: 472 DAG size of output: 363 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:32:10,500 WARN L234 SmtUtils]: Spent 12.53s on a formula simplification. DAG size of input: 451 DAG size of output: 345 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:32:26,129 WARN L234 SmtUtils]: Spent 13.40s on a formula simplification. DAG size of input: 477 DAG size of output: 361 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:33:19,741 WARN L234 SmtUtils]: Spent 9.77s on a formula simplification. DAG size of input: 585 DAG size of output: 479 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:12,018 WARN L234 SmtUtils]: Spent 21.77s on a formula simplification. DAG size of input: 656 DAG size of output: 456 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:23,631 WARN L234 SmtUtils]: Spent 9.81s on a formula simplification. DAG size of input: 653 DAG size of output: 424 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:23,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3617#(and (= ~__ste_Client_Keyring1_User2~0 0) (= ~__GUIDSL_NON_TERMINAL_main~0 0) (= |old(~__ste_email_encryptionKey0~0)| 0) (= 0 |old(~__ste_email_isSignatureVerified1~0)|) (<= 1 |outgoing_outgoing__wrappee__Keys_~msg#1|) (<= |outgoing_outgoing__wrappee__AutoResponder_~receiver~0#1| 2) (= ~__ste_email_subject0~0.offset 0) (<= 0 ~__ste_email_encryptionKey1~0) (= ~__SELECTED_FEATURE_Sign~0 0) (= 0 ~__ste_Client_AddressBook0_Address2~0) (= ~__ste_client_outbuffer3~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp~17#1| 2) (<= 1 |outgoing_mail_#in~client#1|) (<= |outgoing_mail_#in~msg#1| 1) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_~tmp~16#1| 2147483648)) (<= 0 (+ 2147483648 |outgoing_getClientId_#res#1|)) (= ~__ste_Client_counter~0 0) (= ~__ste_Client_Keyring1_PublicKey2~0 0) (<= ~__ste_email_encryptionKey1~0 0) (<= ~__ste_email_isSignatureVerified1~0 0) (<= |old(~__ste_email_to0~0)| 2) (= ~__ste_Client_AddressBook2_Alias0~0 0) (= 0 ~__ste_email_subject0~0.base) (<= 1 |outgoing_sign_~client#1|) (<= 1 |outgoing_mail_~msg#1|) (= ~__ste_Client_AddressBook2_Alias1~0 0) (= ~__ste_Client_Keyring2_PublicKey2~0 0) (= ~__ste_client_forwardReceiver3~0 0) (<= |outgoing_sign_~privkey~1#1| 2147483647) (= ~__ste_client_name2~0.offset 0) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_~client#1|) (= ~__ste_client_name1~0.base 0) (<= 0 ~__ste_client_autoResponse1~0) (= |outgoing___utac_acc__EncryptVerify_spec__1_~tmp~8#1| 0) (= |outgoing_verify_~__utac__ad__arg1~0#1| |outgoing_verify_~msg#1|) (<= 2 |outgoing_mail_~tmp~15#1|) (= ~__SELECTED_FEATURE_Verify~0 0) (= ~__ste_Client_Keyring1_User0~0 0) (= 0 |old(~__ste_email_isSignatureVerified0~0)|) (<= |outgoing_sign_~msg#1| 1) (<= 2 |old(~__ste_email_to0~0)|) (<= |outgoing_sign_~tmp~24#1| 2147483647) (<= ~__ste_client_idCounter2~0 3) (<= ~queued_message~0 0) (<= ~__ste_email_isSignatureVerified0~0 0) (= ~__ste_email_body1~0.offset 0) (= ~__SELECTED_FEATURE_Encrypt~0 0) (= |outgoing___utac_acc__EncryptVerify_spec__1_~msg#1| |outgoing___utac_acc__EncryptVerify_spec__1_#in~msg#1|) (= ~__ste_Client_AddressBook1_Address2~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp___0~6#1| 0) (<= 1 |outgoing___utac_acc__EncryptVerify_spec__1_#in~msg#1|) (<= ~__ste_email_from0~0 2147483647) (= ~__ste_ClientAddressBook_size1~0 0) (= ~__ste_Client_Keyring0_PublicKey0~0 0) (= ~__ste_Email_counter~0 0) (<= |outgoing_incoming_#in~msg#1| 1) (<= |outgoing_sign_~client#1| 1) (= ~__ste_ClientKeyring_size1~0 0) (= |old(~__ste_email_signKey0~0)| 0) (= ~__ste_email_body0~0.offset 0) (<= 1 |outgoing_~client#1|) (<= 0 ~__ste_email_isSigned1~0) (<= 0 (+ ~__ste_email_from0~0 2147483648)) (= ~__ste_Client_Keyring0_User2~0 0) (= ~__ste_ClientAddressBook_size0~0 0) (= ~__ste_Client_Keyring0_User1~0 0) (= ~__ste_Client_AddressBook1_Alias1~0 0) (= ~__ste_client_name1~0.offset 0) (<= |outgoing_getClientId_#res#1| 2147483647) (= ~head~0.offset 0) (= ~__ste_client_name0~0.offset 0) (= |outgoing_#in~msg#1| 1) (<= 1 |outgoing_outgoing__wrappee__Keys_~client#1|) (<= 0 |outgoing_outgoing__wrappee__AutoResponder_~tmp___0~6#1|) (= ~__ste_Client_Keyring0_PublicKey2~0 0) (= |old(~queue_empty~0)| 1) (<= 1 |outgoing_verify_#in~msg#1|) (<= ~__ste_client_privateKey2~0 789) (= ~__ste_Client_Keyring1_PublicKey0~0 0) (= |old(~__ste_email_from0~0)| 0) (<= |outgoing_sign_#in~client#1| 1) (<= ~queue_empty~0 1) (<= 1 |outgoing_incoming_#in~msg#1|) (= ~__SELECTED_FEATURE_Decrypt~0 0) (<= 1 |outgoing_getClientId_~handle#1|) (<= 0 (+ ~__ste_email_signKey0~0 2147483648)) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1|) (<= 0 ~__ste_email_isEncrypted1~0) (= ~__SELECTED_FEATURE_Keys~0 0) (<= ~__ste_email_signKey0~0 2147483647) (= |old(~__ste_email_isSigned0~0)| 0) (= ~__SELECTED_FEATURE_AddressBook~0 0) (= ~__ste_client_forwardReceiver2~0 0) (= ~__ste_Client_Keyring0_PublicKey1~0 0) (= ~__SELECTED_FEATURE_Forward~0 0) (<= 0 ~__ste_email_isEncrypted0~0) (= ~__ste_Client_Keyring0_User0~0 0) (<= 1 |outgoing_mail_#in~msg#1|) (<= ~__ste_client_idCounter0~0 2147483647) (= ~__ste_Client_Keyring2_PublicKey1~0 0) (= ~__ste_email_body0~0.base 0) (<= ~__ste_email_isSigned0~0 1) (<= |outgoing_outgoing__wrappee__Keys_~tmp~16#1| 2147483647) (<= ~__ste_email_isEncrypted0~0 0) (= ~__ste_Client_AddressBook0_Alias0~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~msg#1|) (= ~__ste_email_id0~0 0) (<= ~__ste_client_autoResponse0~0 0) (= ~__ste_Client_Keyring2_User1~0 0) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_#in~client#1|) (<= 3 ~__ste_client_idCounter2~0) (= ~__ste_Client_AddressBook2_Address2~0 0) (= 3 ~chuck~0) (= ~__ste_Client_AddressBook2_Address1~0 0) (<= 0 ~__ste_email_signKey1~0) (<= 1 ~queue_empty~0) (<= ~__ste_email_signKey1~0 0) (<= ~__ste_email_isSigned1~0 0) (= ~bob~0 1) (= ~__ste_client_forwardReceiver1~0 0) (<= 0 ~__ste_client_autoResponse0~0) (= |outgoing_incoming_~privkey~0#1| 0) (<= 0 ~queued_message~0) (= ~__ste_Client_AddressBook1_Alias2~0 0) (<= 0 ~__ste_email_isSignatureVerified1~0) (= |old(~__ste_email_isEncrypted0~0)| 0) (= ~__ste_client_outbuffer0~0 0) (<= |outgoing_outgoing__wrappee__Keys_~client#1| 1) (<= 789 ~__ste_client_privateKey2~0) (<= 1 |outgoing_sign_#in~client#1|) (<= |outgoing_getClientId_#in~handle#1| 1) (<= |outgoing_getClientId_~retValue_acc~26#1| 2147483647) (<= 1 |outgoing_sign_~msg#1|) (<= |outgoing_mail_~tmp~15#1| 2) (<= 1 |outgoing_~msg#1|) (= ~__SELECTED_FEATURE_Base~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~client#1| 1) (= |old(~__ste_email_signKey1~0)| 0) (= ~__ste_client_forwardReceiver0~0 0) (<= |outgoing_mail_~client#1| 1) (= ~__ste_Client_Keyring2_User0~0 0) (= |outgoing_outgoing__wrappee__AutoResponder_~pubkey~0#1| 0) (= ~rjh~0 2) (= 0 ~__ste_Client_AddressBook0_Address1~0) (= ~__ste_Client_AddressBook2_Address0~0 0) (= ~__ste_Client_Keyring1_PublicKey1~0 0) (<= 0 ~queued_client~0) (= |old(~queued_message~0)| 0) (= ~__ste_Client_Keyring2_PublicKey0~0 0) (<= 0 ~__ste_email_isSignatureVerified0~0) (= ~__ste_Client_AddressBook1_Address0~0 0) (= ~__ste_client_name2~0.base 0) (<= |outgoing_mail_~msg#1| 1) (= |old(~queued_client~0)| 0) (<= |outgoing_incoming__wrappee__Verify_#in~client#1| 2) (= |outgoing_incoming_~msg#1| |outgoing_incoming__wrappee__Verify_#in~msg#1|) (<= ~__ste_email_encryptionKey0~0 0) (= |outgoing_incoming__wrappee__Verify_~client#1| |outgoing_verify_#in~client#1|) (= ~__ste_email_subject1~0.base 0) (= ~__ste_Client_AddressBook1_Alias0~0 0) (<= |outgoing_mail_#in~client#1| 1) (<= |outgoing_outgoing__wrappee__Keys_#in~client#1| 1) (= ~__ste_Client_Keyring2_User2~0 0) (= |outgoing_incoming__wrappee__Verify_~msg#1| |outgoing_verify_#in~msg#1|) (<= 0 (+ 2147483648 |outgoing_sign_~tmp~24#1|)) (= ~head~0.base 0) (<= 2 |outgoing_outgoing__wrappee__AutoResponder_~receiver~0#1|) (= ~__ste_Client_Keyring1_User1~0 0) (= |#NULL.offset| 0) (<= |outgoing_incoming_~msg#1| 1) (<= |outgoing_sign_#in~msg#1| 1) (= ~__ste_Client_AddressBook2_Alias2~0 0) (<= |outgoing_#in~client#1| 1) (<= 1 |outgoing_incoming_~msg#1|) (<= 0 (+ |outgoing_sign_~privkey~1#1| 2147483648)) (<= 0 ~__ste_email_isSigned0~0) (= |outgoing_incoming_~client#1| |outgoing_incoming__wrappee__Verify_#in~client#1|) (<= 0 ~__ste_client_autoResponse2~0) (= ~__ste_email_subject1~0.offset 0) (= ~__ste_Client_AddressBook0_Alias2~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1| 1) (= ~__ste_ClientKeyring_size0~0 0) (<= |outgoing___utac_acc__EncryptVerify_spec__1_~msg#1| 1) (<= |outgoing_~msg#1| 1) (<= |outgoing_outgoing__wrappee__AutoResponder_~client#1| 1) (= ~__ste_Client_AddressBook1_Address1~0 0) (<= |outgoing_outgoing__wrappee__Keys_~msg#1| 1) (= 0 ~__ste_Client_AddressBook0_Address0~0) (= ~__ste_client_outbuffer1~0 0) (<= |outgoing_incoming__wrappee__Verify_~msg#1| 1) (<= |outgoing_outgoing__wrappee__AutoResponder_~msg#1| 1) (= |old(~__ste_email_isSigned1~0)| 0) (= ~__ste_Client_AddressBook0_Alias1~0 0) (<= ~__ste_email_isEncrypted1~0 0) (= |old(~__ste_email_isEncrypted1~0)| 0) (<= 1 |outgoing_getClientId_#in~handle#1|) (= ~__GUIDSL_ROOT_PRODUCTION~0 0) (<= |outgoing_getClientId_~handle#1| 1) (<= 1 |outgoing_sign_#in~msg#1|) (<= 1 |outgoing_#in~client#1|) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_~msg#1|) (<= |outgoing_~client#1| 1) (= |old(~__ste_email_encryptionKey1~0)| 0) (<= 2 |outgoing_incoming_#in~client#1|) (= ~__ste_client_name0~0.base 0) (= ~__ste_email_id1~0 0) (= |outgoing_verify_~client#1| |outgoing_verify_#in~client#1|) (= ~__ste_client_outbuffer2~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~client#1|) (<= 0 (+ ~__ste_client_idCounter0~0 2147483648)) (<= 2 ~__ste_email_to0~0) (<= 0 |#StackHeapBarrier|) (<= ~__ste_email_to0~0 2) (<= 1 |outgoing_mail_~client#1|) (<= 2 |outgoing_outgoing__wrappee__AutoResponder_~tmp~17#1|) (= ~__ste_ClientAddressBook_size2~0 0) (<= 2 |outgoing_incoming__wrappee__Verify_~client#1|) (= ~__SELECTED_FEATURE_AutoResponder~0 0) (<= ~__ste_client_autoResponse2~0 0) (= ~__ste_email_body1~0.base 0) (= |outgoing_verify_~msg#1| |outgoing_verify_#in~msg#1|) (= ~__ste_ClientKeyring_size2~0 0) (= |outgoing_incoming_~tmp~20#1| |outgoing_incoming_~privkey~0#1|) (<= |outgoing_verify_~client#1| 2) (<= 2 |outgoing_incoming__wrappee__Verify_#in~client#1|) (<= 0 (+ |outgoing_getClientId_~retValue_acc~26#1| 2147483648)) (<= 0 ~__ste_email_encryptionKey0~0) (= |#NULL.base| 0) (<= |outgoing_incoming_#in~client#1| 2) (<= |outgoing_outgoing__wrappee__Keys_#in~msg#1| 1) (<= ~queued_client~0 0))' at error location [2022-11-03 03:34:23,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:34:23,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:23,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-03 03:34:23,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636001664] [2022-11-03 03:34:23,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:23,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:34:23,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:34:23,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4344, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 03:34:23,641 INFO L87 Difference]: Start difference. First operand 251 states and 352 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 03:34:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:24,034 INFO L93 Difference]: Finished difference Result 624 states and 932 transitions. [2022-11-03 03:34:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:34:24,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 84 [2022-11-03 03:34:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:24,039 INFO L225 Difference]: With dead ends: 624 [2022-11-03 03:34:24,039 INFO L226 Difference]: Without dead ends: 501 [2022-11-03 03:34:24,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 280.7s TimeCoverageRelationStatistics Valid=212, Invalid=4344, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 03:34:24,043 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 216 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:24,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1096 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:34:24,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-03 03:34:24,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 486. [2022-11-03 03:34:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 324 states have (on average 1.4907407407407407) internal successors, (483), 327 states have internal predecessors, (483), 137 states have call successors, (137), 24 states have call predecessors, (137), 24 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2022-11-03 03:34:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 756 transitions. [2022-11-03 03:34:24,083 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 756 transitions. Word has length 84 [2022-11-03 03:34:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:24,084 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 756 transitions. [2022-11-03 03:34:24,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 03:34:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 756 transitions. [2022-11-03 03:34:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 03:34:24,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:24,088 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:24,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:24,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:24,308 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash -89367720, now seen corresponding path program 1 times [2022-11-03 03:34:24,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:24,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40570342] [2022-11-03 03:34:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:24,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:24,399 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 03:34:24,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:24,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40570342] [2022-11-03 03:34:24,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40570342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:24,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:24,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:34:24,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572972666] [2022-11-03 03:34:24,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:24,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:24,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:24,402 INFO L87 Difference]: Start difference. First operand 486 states and 756 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:24,535 INFO L93 Difference]: Finished difference Result 1177 states and 1870 transitions. [2022-11-03 03:34:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:24,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 90 [2022-11-03 03:34:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:24,541 INFO L225 Difference]: With dead ends: 1177 [2022-11-03 03:34:24,541 INFO L226 Difference]: Without dead ends: 723 [2022-11-03 03:34:24,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:24,544 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 55 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:24,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 490 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:24,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-11-03 03:34:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 718. [2022-11-03 03:34:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 492 states have (on average 1.516260162601626) internal successors, (746), 495 states have internal predecessors, (746), 201 states have call successors, (201), 24 states have call predecessors, (201), 24 states have return successors, (200), 200 states have call predecessors, (200), 200 states have call successors, (200) [2022-11-03 03:34:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1147 transitions. [2022-11-03 03:34:24,625 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1147 transitions. Word has length 90 [2022-11-03 03:34:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:24,627 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 1147 transitions. [2022-11-03 03:34:24,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1147 transitions. [2022-11-03 03:34:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 03:34:24,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:24,632 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:24,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:34:24,632 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:24,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1043153862, now seen corresponding path program 1 times [2022-11-03 03:34:24,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:24,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907345298] [2022-11-03 03:34:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:24,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:24,739 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 03:34:24,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:24,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907345298] [2022-11-03 03:34:24,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907345298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:24,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:24,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:34:24,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148427281] [2022-11-03 03:34:24,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:24,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:24,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:24,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:24,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:24,742 INFO L87 Difference]: Start difference. First operand 718 states and 1147 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:24,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:24,921 INFO L93 Difference]: Finished difference Result 1734 states and 2813 transitions. [2022-11-03 03:34:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:24,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 91 [2022-11-03 03:34:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:24,930 INFO L225 Difference]: With dead ends: 1734 [2022-11-03 03:34:24,930 INFO L226 Difference]: Without dead ends: 1078 [2022-11-03 03:34:24,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:24,934 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 53 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:24,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 480 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:24,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2022-11-03 03:34:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1073. [2022-11-03 03:34:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 752 states have (on average 1.5292553191489362) internal successors, (1150), 755 states have internal predecessors, (1150), 296 states have call successors, (296), 24 states have call predecessors, (296), 24 states have return successors, (295), 295 states have call predecessors, (295), 295 states have call successors, (295) [2022-11-03 03:34:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1741 transitions. [2022-11-03 03:34:25,001 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1741 transitions. Word has length 91 [2022-11-03 03:34:25,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:25,002 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 1741 transitions. [2022-11-03 03:34:25,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1741 transitions. [2022-11-03 03:34:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 03:34:25,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:25,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:25,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:34:25,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:25,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:25,008 INFO L85 PathProgramCache]: Analyzing trace with hash -945807222, now seen corresponding path program 1 times [2022-11-03 03:34:25,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:25,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254937272] [2022-11-03 03:34:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:25,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:25,089 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 03:34:25,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:25,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254937272] [2022-11-03 03:34:25,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254937272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:25,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:25,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:34:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781214829] [2022-11-03 03:34:25,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:25,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:25,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:25,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:25,092 INFO L87 Difference]: Start difference. First operand 1073 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:25,277 INFO L93 Difference]: Finished difference Result 2532 states and 4157 transitions. [2022-11-03 03:34:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:25,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-11-03 03:34:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:25,287 INFO L225 Difference]: With dead ends: 2532 [2022-11-03 03:34:25,288 INFO L226 Difference]: Without dead ends: 1601 [2022-11-03 03:34:25,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:25,292 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 51 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:25,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 474 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2022-11-03 03:34:25,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1596. [2022-11-03 03:34:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1152 states have (on average 1.5381944444444444) internal successors, (1772), 1155 states have internal predecessors, (1772), 419 states have call successors, (419), 24 states have call predecessors, (419), 24 states have return successors, (418), 418 states have call predecessors, (418), 418 states have call successors, (418) [2022-11-03 03:34:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2609 transitions. [2022-11-03 03:34:25,392 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2609 transitions. Word has length 92 [2022-11-03 03:34:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:25,393 INFO L495 AbstractCegarLoop]: Abstraction has 1596 states and 2609 transitions. [2022-11-03 03:34:25,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2609 transitions. [2022-11-03 03:34:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 03:34:25,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:25,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:25,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:34:25,401 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:25,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2095312197, now seen corresponding path program 1 times [2022-11-03 03:34:25,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:25,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117094348] [2022-11-03 03:34:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:25,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:25,481 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 03:34:25,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:25,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117094348] [2022-11-03 03:34:25,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117094348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:25,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:25,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:34:25,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740279425] [2022-11-03 03:34:25,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:25,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:25,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:25,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:25,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:25,484 INFO L87 Difference]: Start difference. First operand 1596 states and 2609 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:25,718 INFO L93 Difference]: Finished difference Result 3742 states and 6185 transitions. [2022-11-03 03:34:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2022-11-03 03:34:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:25,732 INFO L225 Difference]: With dead ends: 3742 [2022-11-03 03:34:25,732 INFO L226 Difference]: Without dead ends: 2425 [2022-11-03 03:34:25,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:25,737 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 49 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:25,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 476 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-11-03 03:34:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2420. [2022-11-03 03:34:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 1797 states have (on average 1.543683917640512) internal successors, (2774), 1800 states have internal predecessors, (2774), 598 states have call successors, (598), 24 states have call predecessors, (598), 24 states have return successors, (597), 597 states have call predecessors, (597), 597 states have call successors, (597) [2022-11-03 03:34:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 3969 transitions. [2022-11-03 03:34:25,907 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 3969 transitions. Word has length 93 [2022-11-03 03:34:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:25,908 INFO L495 AbstractCegarLoop]: Abstraction has 2420 states and 3969 transitions. [2022-11-03 03:34:25,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 3969 transitions. [2022-11-03 03:34:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 03:34:25,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:25,918 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:25,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:34:25,919 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:25,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1010142898, now seen corresponding path program 1 times [2022-11-03 03:34:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:25,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114748428] [2022-11-03 03:34:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:25,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:26,001 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 03:34:26,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:26,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114748428] [2022-11-03 03:34:26,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114748428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:26,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:26,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:34:26,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460285258] [2022-11-03 03:34:26,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:26,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:26,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:26,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:26,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:26,009 INFO L87 Difference]: Start difference. First operand 2420 states and 3969 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:26,349 INFO L93 Difference]: Finished difference Result 5953 states and 9857 transitions. [2022-11-03 03:34:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:26,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 94 [2022-11-03 03:34:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:26,370 INFO L225 Difference]: With dead ends: 5953 [2022-11-03 03:34:26,370 INFO L226 Difference]: Without dead ends: 3955 [2022-11-03 03:34:26,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:26,377 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 47 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:26,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 488 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2022-11-03 03:34:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3950. [2022-11-03 03:34:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 2951 states have (on average 1.5347339884784819) internal successors, (4529), 2954 states have internal predecessors, (4529), 974 states have call successors, (974), 24 states have call predecessors, (974), 24 states have return successors, (973), 973 states have call predecessors, (973), 973 states have call successors, (973) [2022-11-03 03:34:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 6476 transitions. [2022-11-03 03:34:26,654 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 6476 transitions. Word has length 94 [2022-11-03 03:34:26,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:26,655 INFO L495 AbstractCegarLoop]: Abstraction has 3950 states and 6476 transitions. [2022-11-03 03:34:26,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:26,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 6476 transitions. [2022-11-03 03:34:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 03:34:26,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:26,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:26,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:34:26,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:26,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:26,671 INFO L85 PathProgramCache]: Analyzing trace with hash 303364225, now seen corresponding path program 1 times [2022-11-03 03:34:26,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:26,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145240121] [2022-11-03 03:34:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:26,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:26,752 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 03:34:26,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145240121] [2022-11-03 03:34:26,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145240121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:26,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:26,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:34:26,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587215993] [2022-11-03 03:34:26,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:26,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:26,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:26,755 INFO L87 Difference]: Start difference. First operand 3950 states and 6476 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:27,194 INFO L93 Difference]: Finished difference Result 9814 states and 16254 transitions. [2022-11-03 03:34:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:27,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 95 [2022-11-03 03:34:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:27,235 INFO L225 Difference]: With dead ends: 9814 [2022-11-03 03:34:27,235 INFO L226 Difference]: Without dead ends: 6552 [2022-11-03 03:34:27,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:27,250 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 45 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:27,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 479 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2022-11-03 03:34:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 6547. [2022-11-03 03:34:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 4942 states have (on average 1.5317685147713476) internal successors, (7570), 4945 states have internal predecessors, (7570), 1580 states have call successors, (1580), 24 states have call predecessors, (1580), 24 states have return successors, (1579), 1579 states have call predecessors, (1579), 1579 states have call successors, (1579) [2022-11-03 03:34:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 10729 transitions. [2022-11-03 03:34:27,884 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 10729 transitions. Word has length 95 [2022-11-03 03:34:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:27,884 INFO L495 AbstractCegarLoop]: Abstraction has 6547 states and 10729 transitions. [2022-11-03 03:34:27,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 10729 transitions. [2022-11-03 03:34:27,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-03 03:34:27,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:27,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:27,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:34:27,909 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:27,909 INFO L85 PathProgramCache]: Analyzing trace with hash 902535200, now seen corresponding path program 1 times [2022-11-03 03:34:27,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:27,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752602718] [2022-11-03 03:34:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:27,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:28,031 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 03:34:28,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:28,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752602718] [2022-11-03 03:34:28,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752602718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:28,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:28,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:34:28,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428840269] [2022-11-03 03:34:28,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:28,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:28,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:28,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:28,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:28,035 INFO L87 Difference]: Start difference. First operand 6547 states and 10729 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:28,762 INFO L93 Difference]: Finished difference Result 17066 states and 28172 transitions. [2022-11-03 03:34:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 96 [2022-11-03 03:34:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:28,952 INFO L225 Difference]: With dead ends: 17066 [2022-11-03 03:34:28,952 INFO L226 Difference]: Without dead ends: 11496 [2022-11-03 03:34:28,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:28,971 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 43 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:28,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 485 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2022-11-03 03:34:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 11491. [2022-11-03 03:34:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 8683 states have (on average 1.5191754002073017) internal successors, (13191), 8686 states have internal predecessors, (13191), 2783 states have call successors, (2783), 24 states have call predecessors, (2783), 24 states have return successors, (2782), 2782 states have call predecessors, (2782), 2782 states have call successors, (2782) [2022-11-03 03:34:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 18756 transitions. [2022-11-03 03:34:30,030 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 18756 transitions. Word has length 96 [2022-11-03 03:34:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:30,030 INFO L495 AbstractCegarLoop]: Abstraction has 11491 states and 18756 transitions. [2022-11-03 03:34:30,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 18756 transitions. [2022-11-03 03:34:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 03:34:30,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:30,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:30,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:34:30,063 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1765430496, now seen corresponding path program 1 times [2022-11-03 03:34:30,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:30,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009184527] [2022-11-03 03:34:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:30,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:30,154 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 03:34:30,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:30,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009184527] [2022-11-03 03:34:30,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009184527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:30,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:30,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:34:30,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65343493] [2022-11-03 03:34:30,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:30,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:30,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:30,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:30,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:30,158 INFO L87 Difference]: Start difference. First operand 11491 states and 18756 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:31,550 INFO L93 Difference]: Finished difference Result 30385 states and 49938 transitions. [2022-11-03 03:34:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:31,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 97 [2022-11-03 03:34:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:31,634 INFO L225 Difference]: With dead ends: 30385 [2022-11-03 03:34:31,634 INFO L226 Difference]: Without dead ends: 20323 [2022-11-03 03:34:31,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:31,666 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 41 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:31,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 479 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:31,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20323 states. [2022-11-03 03:34:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20323 to 20318. [2022-11-03 03:34:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20318 states, 15471 states have (on average 1.5118609010406567) internal successors, (23390), 15474 states have internal predecessors, (23390), 4822 states have call successors, (4822), 24 states have call predecessors, (4822), 24 states have return successors, (4821), 4821 states have call predecessors, (4821), 4821 states have call successors, (4821) [2022-11-03 03:34:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20318 states to 20318 states and 33033 transitions. [2022-11-03 03:34:33,835 INFO L78 Accepts]: Start accepts. Automaton has 20318 states and 33033 transitions. Word has length 97 [2022-11-03 03:34:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:33,837 INFO L495 AbstractCegarLoop]: Abstraction has 20318 states and 33033 transitions. [2022-11-03 03:34:33,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:33,837 INFO L276 IsEmpty]: Start isEmpty. Operand 20318 states and 33033 transitions. [2022-11-03 03:34:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:34:33,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:33,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:34:33,881 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash -44680194, now seen corresponding path program 1 times [2022-11-03 03:34:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:33,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453146346] [2022-11-03 03:34:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:33,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:33,968 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 03:34:33,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:33,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453146346] [2022-11-03 03:34:33,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453146346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:33,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:33,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:34:33,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547153955] [2022-11-03 03:34:33,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:33,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:33,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:33,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:33,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:33,971 INFO L87 Difference]: Start difference. First operand 20318 states and 33033 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:36,384 INFO L93 Difference]: Finished difference Result 55097 states and 90030 transitions. [2022-11-03 03:34:36,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:36,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 98 [2022-11-03 03:34:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:36,547 INFO L225 Difference]: With dead ends: 55097 [2022-11-03 03:34:36,547 INFO L226 Difference]: Without dead ends: 36763 [2022-11-03 03:34:36,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:36,599 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 39 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:36,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 481 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36763 states. [2022-11-03 03:34:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36763 to 36758. [2022-11-03 03:34:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36758 states, 28196 states have (on average 1.5014186409419776) internal successors, (42334), 28199 states have internal predecessors, (42334), 8537 states have call successors, (8537), 24 states have call predecessors, (8537), 24 states have return successors, (8536), 8536 states have call predecessors, (8536), 8536 states have call successors, (8536) [2022-11-03 03:34:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36758 states to 36758 states and 59407 transitions. [2022-11-03 03:34:40,122 INFO L78 Accepts]: Start accepts. Automaton has 36758 states and 59407 transitions. Word has length 98 [2022-11-03 03:34:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:40,122 INFO L495 AbstractCegarLoop]: Abstraction has 36758 states and 59407 transitions. [2022-11-03 03:34:40,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 36758 states and 59407 transitions. [2022-11-03 03:34:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 03:34:40,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:40,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:40,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:34:40,171 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1155216960, now seen corresponding path program 1 times [2022-11-03 03:34:40,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:40,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018474567] [2022-11-03 03:34:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:40,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:40,260 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 03:34:40,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:40,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018474567] [2022-11-03 03:34:40,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018474567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:40,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:40,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:34:40,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280436939] [2022-11-03 03:34:40,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:40,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:40,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:40,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:40,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:40,263 INFO L87 Difference]: Start difference. First operand 36758 states and 59407 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:44,558 INFO L93 Difference]: Finished difference Result 67714 states and 109611 transitions. [2022-11-03 03:34:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:44,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 99 [2022-11-03 03:34:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:44,882 INFO L225 Difference]: With dead ends: 67714 [2022-11-03 03:34:44,882 INFO L226 Difference]: Without dead ends: 67591 [2022-11-03 03:34:44,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:44,905 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 37 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:44,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 479 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67591 states. [2022-11-03 03:34:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67591 to 67586. [2022-11-03 03:34:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67586 states, 52225 states have (on average 1.4876017233125898) internal successors, (77690), 52228 states have internal predecessors, (77690), 15336 states have call successors, (15336), 24 states have call predecessors, (15336), 24 states have return successors, (15335), 15335 states have call predecessors, (15335), 15335 states have call successors, (15335) [2022-11-03 03:34:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67586 states to 67586 states and 108361 transitions. [2022-11-03 03:34:49,978 INFO L78 Accepts]: Start accepts. Automaton has 67586 states and 108361 transitions. Word has length 99 [2022-11-03 03:34:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:49,979 INFO L495 AbstractCegarLoop]: Abstraction has 67586 states and 108361 transitions. [2022-11-03 03:34:49,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 67586 states and 108361 transitions. [2022-11-03 03:34:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 03:34:50,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:50,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:50,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:34:50,033 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:50,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1975911455, now seen corresponding path program 1 times [2022-11-03 03:34:50,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:50,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356077127] [2022-11-03 03:34:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:50,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:51,624 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 03:34:51,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:51,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356077127] [2022-11-03 03:34:51,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356077127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:51,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:51,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-03 03:34:51,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685392294] [2022-11-03 03:34:51,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:51,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 03:34:51,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:51,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 03:34:51,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:34:51,626 INFO L87 Difference]: Start difference. First operand 67586 states and 108361 transitions. Second operand has 19 states, 14 states have (on average 4.214285714285714) internal successors, (59), 16 states have internal predecessors, (59), 10 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-03 03:34:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:57,988 INFO L93 Difference]: Finished difference Result 67778 states and 108619 transitions. [2022-11-03 03:34:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:34:57,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 4.214285714285714) internal successors, (59), 16 states have internal predecessors, (59), 10 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) Word has length 100 [2022-11-03 03:34:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:58,343 INFO L225 Difference]: With dead ends: 67778 [2022-11-03 03:34:58,343 INFO L226 Difference]: Without dead ends: 67731 [2022-11-03 03:34:58,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 03:34:58,365 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 600 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 2982 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:58,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 2870 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 2982 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 03:34:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67731 states. [2022-11-03 03:35:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67731 to 67723. [2022-11-03 03:35:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67723 states, 52305 states have (on average 1.4871044833189944) internal successors, (77783), 52308 states have internal predecessors, (77783), 15377 states have call successors, (15377), 40 states have call predecessors, (15377), 40 states have return successors, (15377), 15376 states have call predecessors, (15377), 15375 states have call successors, (15377) [2022-11-03 03:35:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67723 states to 67723 states and 108537 transitions. [2022-11-03 03:35:04,317 INFO L78 Accepts]: Start accepts. Automaton has 67723 states and 108537 transitions. Word has length 100 [2022-11-03 03:35:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:04,317 INFO L495 AbstractCegarLoop]: Abstraction has 67723 states and 108537 transitions. [2022-11-03 03:35:04,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 4.214285714285714) internal successors, (59), 16 states have internal predecessors, (59), 10 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-03 03:35:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 67723 states and 108537 transitions. [2022-11-03 03:35:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 03:35:04,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:04,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:04,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 03:35:04,374 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:04,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:04,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1424480508, now seen corresponding path program 1 times [2022-11-03 03:35:04,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:04,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927279647] [2022-11-03 03:35:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:04,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:35:06,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:06,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927279647] [2022-11-03 03:35:06,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927279647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:06,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519624594] [2022-11-03 03:35:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:06,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:06,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:06,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:06,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783131b4-a5fb-4d79-a251-ea53118faafb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:35:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-03 03:35:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:35:08,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:35:08,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519624594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:08,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:35:08,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [25] total 43 [2022-11-03 03:35:08,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634202901] [2022-11-03 03:35:08,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:08,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 03:35:08,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 03:35:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1678, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 03:35:08,902 INFO L87 Difference]: Start difference. First operand 67723 states and 108537 transitions. Second operand has 20 states, 13 states have (on average 5.076923076923077) internal successors, (66), 14 states have internal predecessors, (66), 8 states have call successors, (20), 7 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18)