./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW --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 cc83a32f8f5c6143265231752530a7f576faa355052cdad9509cfbce0d0adeb3 --- 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-4e7fbc6 [2022-11-23 14:07:29,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:07:29,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:07:29,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:07:29,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:07:29,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:07:29,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:07:29,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:07:29,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:07:29,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:07:29,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:07:29,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:07:29,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:07:29,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:07:29,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:07:29,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:07:29,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:07:29,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:07:29,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:07:29,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:07:29,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:07:29,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:07:29,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:07:29,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:07:29,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:07:29,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:07:29,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:07:29,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:07:29,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:07:29,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:07:29,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:07:29,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:07:29,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:07:29,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:07:29,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:07:29,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:07:29,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:07:29,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:07:29,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:07:29,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:07:29,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:07:29,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:07:29,788 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:07:29,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:07:29,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:07:29,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:07:29,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:07:29,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:07:29,789 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:07:29,790 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:07:29,790 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:07:29,790 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:07:29,790 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:07:29,790 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:07:29,790 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:07:29,791 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:07:29,791 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:07:29,791 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:07:29,791 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:07:29,791 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:07:29,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:07:29,792 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:07:29,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:07:29,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:07:29,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:07:29,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:07:29,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:07:29,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:07:29,793 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:07:29,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:07:29,794 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:07:29,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:07:29,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:07:29,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:07:29,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:07:29,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:07:29,795 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:07:29,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:07:29,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:07:29,795 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:07:29,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:07:29,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:07:29,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:07:29,796 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_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc83a32f8f5c6143265231752530a7f576faa355052cdad9509cfbce0d0adeb3 [2022-11-23 14:07:30,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:07:30,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:07:30,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:07:30,057 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:07:30,057 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:07:30,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/email_spec4_product24.cil.c [2022-11-23 14:07:33,128 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:07:33,535 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:07:33,535 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/sv-benchmarks/c/product-lines/email_spec4_product24.cil.c [2022-11-23 14:07:33,565 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/data/6fed160de/ab849eb91f96406589d25a9d60e22511/FLAG496c1cb30 [2022-11-23 14:07:33,581 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/data/6fed160de/ab849eb91f96406589d25a9d60e22511 [2022-11-23 14:07:33,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:07:33,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:07:33,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:07:33,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:07:33,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:07:33,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:33" (1/1) ... [2022-11-23 14:07:33,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ed3089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:33, skipping insertion in model container [2022-11-23 14:07:33,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:33" (1/1) ... [2022-11-23 14:07:33,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:07:33,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:07:34,093 WARN L237 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_556598c5-0daf-4e19-8021-ce428c1c66d2/sv-benchmarks/c/product-lines/email_spec4_product24.cil.c[33676,33689] [2022-11-23 14:07:34,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:07:34,360 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:07:34,441 WARN L237 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_556598c5-0daf-4e19-8021-ce428c1c66d2/sv-benchmarks/c/product-lines/email_spec4_product24.cil.c[33676,33689] [2022-11-23 14:07:34,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:07:34,555 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:07:34,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34 WrapperNode [2022-11-23 14:07:34,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:07:34,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:07:34,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:07:34,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:07:34,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,676 INFO L138 Inliner]: procedures = 130, calls = 209, calls flagged for inlining = 63, calls inlined = 58, statements flattened = 1034 [2022-11-23 14:07:34,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:07:34,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:07:34,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:07:34,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:07:34,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,781 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:07:34,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:07:34,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:07:34,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:07:34,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (1/1) ... [2022-11-23 14:07:34,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:07:34,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:34,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:07:34,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:07:34,899 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-23 14:07:34,899 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-23 14:07:34,899 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-23 14:07:34,899 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-23 14:07:34,899 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-23 14:07:34,900 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-23 14:07:34,900 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-23 14:07:34,900 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-23 14:07:34,900 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-23 14:07:34,900 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-23 14:07:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-23 14:07:34,901 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-23 14:07:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-23 14:07:34,901 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-23 14:07:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-23 14:07:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-23 14:07:34,902 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-23 14:07:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2022-11-23 14:07:34,902 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2022-11-23 14:07:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-23 14:07:34,902 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-23 14:07:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:07:34,903 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-23 14:07:34,904 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-23 14:07:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-23 14:07:34,904 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-23 14:07:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-23 14:07:34,905 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-23 14:07:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-23 14:07:34,905 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-23 14:07:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-23 14:07:34,906 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-23 14:07:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-23 14:07:34,906 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-23 14:07:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-23 14:07:34,906 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-23 14:07:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:07:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-23 14:07:34,907 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-23 14:07:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:07:34,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:07:35,196 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:07:35,198 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:07:36,151 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:07:36,717 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:07:36,718 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:07:36,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:36 BoogieIcfgContainer [2022-11-23 14:07:36,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:07:36,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:07:36,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:07:36,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:07:36,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:07:33" (1/3) ... [2022-11-23 14:07:36,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26bd5631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:36, skipping insertion in model container [2022-11-23 14:07:36,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:34" (2/3) ... [2022-11-23 14:07:36,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26bd5631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:36, skipping insertion in model container [2022-11-23 14:07:36,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:36" (3/3) ... [2022-11-23 14:07:36,737 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec4_product24.cil.c [2022-11-23 14:07:36,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:07:36,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:07:36,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:07:36,839 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;@b10a19e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:07:36,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:07:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 168 states, 100 states have (on average 1.34) internal successors, (134), 102 states have internal predecessors, (134), 48 states have call successors, (48), 18 states have call predecessors, (48), 18 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-23 14:07:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 14:07:36,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:36,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:36,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:36,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1854177568, now seen corresponding path program 1 times [2022-11-23 14:07:36,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:36,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774999336] [2022-11-23 14:07:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:36,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:07:37,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:37,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774999336] [2022-11-23 14:07:37,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774999336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:37,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:37,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:07:37,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58317290] [2022-11-23 14:07:37,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:37,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:07:37,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:07:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:07:37,314 INFO L87 Difference]: Start difference. First operand has 168 states, 100 states have (on average 1.34) internal successors, (134), 102 states have internal predecessors, (134), 48 states have call successors, (48), 18 states have call predecessors, (48), 18 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:07:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:37,441 INFO L93 Difference]: Finished difference Result 253 states and 338 transitions. [2022-11-23 14:07:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:07:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 58 [2022-11-23 14:07:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:37,454 INFO L225 Difference]: With dead ends: 253 [2022-11-23 14:07:37,454 INFO L226 Difference]: Without dead ends: 165 [2022-11-23 14:07:37,459 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 [2022-11-23 14:07:37,462 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:37,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 194 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:37,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-23 14:07:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-11-23 14:07:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 99 states have internal predecessors, (128), 48 states have call successors, (48), 18 states have call predecessors, (48), 18 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-23 14:07:37,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 223 transitions. [2022-11-23 14:07:37,524 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 223 transitions. Word has length 58 [2022-11-23 14:07:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:37,525 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 223 transitions. [2022-11-23 14:07:37,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:07:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 223 transitions. [2022-11-23 14:07:37,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-23 14:07:37,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:37,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:37,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:07:37,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash 527445080, now seen corresponding path program 1 times [2022-11-23 14:07:37,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:37,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486076544] [2022-11-23 14:07:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:37,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:07:37,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:37,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486076544] [2022-11-23 14:07:37,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486076544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:37,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:37,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:07:37,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76282426] [2022-11-23 14:07:37,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:37,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:37,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:37,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:37,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:37,761 INFO L87 Difference]: Start difference. First operand 165 states and 223 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:07:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:37,939 INFO L93 Difference]: Finished difference Result 249 states and 326 transitions. [2022-11-23 14:07:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:37,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 59 [2022-11-23 14:07:37,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:37,942 INFO L225 Difference]: With dead ends: 249 [2022-11-23 14:07:37,945 INFO L226 Difference]: Without dead ends: 167 [2022-11-23 14:07:37,947 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 [2022-11-23 14:07:37,948 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:37,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 381 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-23 14:07:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-11-23 14:07:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 100 states have (on average 1.3) internal successors, (130), 101 states have internal predecessors, (130), 48 states have call successors, (48), 18 states have call predecessors, (48), 18 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-23 14:07:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2022-11-23 14:07:37,976 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 59 [2022-11-23 14:07:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:37,977 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2022-11-23 14:07:37,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:07:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2022-11-23 14:07:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 14:07:37,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:37,989 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] [2022-11-23 14:07:37,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:07:37,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:37,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:37,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1656620606, now seen corresponding path program 1 times [2022-11-23 14:07:37,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:37,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709746455] [2022-11-23 14:07:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:37,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:07:38,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:38,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709746455] [2022-11-23 14:07:38,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709746455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:38,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:38,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:07:38,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316618177] [2022-11-23 14:07:38,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:38,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:38,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:38,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:38,171 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:07:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:38,303 INFO L93 Difference]: Finished difference Result 364 states and 509 transitions. [2022-11-23 14:07:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:38,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 64 [2022-11-23 14:07:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:38,306 INFO L225 Difference]: With dead ends: 364 [2022-11-23 14:07:38,306 INFO L226 Difference]: Without dead ends: 215 [2022-11-23 14:07:38,307 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 [2022-11-23 14:07:38,308 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 57 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:38,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 398 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-23 14:07:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-11-23 14:07:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 132 states have (on average 1.3863636363636365) internal successors, (183), 133 states have internal predecessors, (183), 59 states have call successors, (59), 18 states have call predecessors, (59), 18 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-23 14:07:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 300 transitions. [2022-11-23 14:07:38,330 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 300 transitions. Word has length 64 [2022-11-23 14:07:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:38,331 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 300 transitions. [2022-11-23 14:07:38,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:07:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 300 transitions. [2022-11-23 14:07:38,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 14:07:38,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:38,336 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] [2022-11-23 14:07:38,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:07:38,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:38,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:38,338 INFO L85 PathProgramCache]: Analyzing trace with hash 79702992, now seen corresponding path program 1 times [2022-11-23 14:07:38,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:38,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897945516] [2022-11-23 14:07:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:38,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:07:38,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897945516] [2022-11-23 14:07:38,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897945516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303879633] [2022-11-23 14:07:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:38,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:38,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:38,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:38,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:07:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:07:38,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:07:39,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:07:39,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303879633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:39,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175734854] [2022-11-23 14:07:39,160 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-23 14:07:39,160 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:07:39,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:07:39,170 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:07:39,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:08:28,967 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-23 14:08:29,283 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-23 14:08:29,693 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 469 for LOIs [2022-11-23 14:09:04,781 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 447 for LOIs [2022-11-23 14:09:05,084 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 467 for LOIs [2022-11-23 14:09:26,072 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 437 for LOIs [2022-11-23 14:09:26,352 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 249 for LOIs [2022-11-23 14:09:26,486 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 247 for LOIs [2022-11-23 14:09:26,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:46,172 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 467 DAG size of output: 264 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:04,386 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 476 DAG size of output: 340 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:12,101 WARN L233 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 486 DAG size of output: 340 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:17,490 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 498 DAG size of output: 313 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:27,123 WARN L233 SmtUtils]: Spent 8.30s on a formula simplification. DAG size of input: 508 DAG size of output: 384 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:38,186 WARN L233 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 590 DAG size of output: 344 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:50,327 WARN L233 SmtUtils]: Spent 9.15s on a formula simplification. DAG size of input: 564 DAG size of output: 424 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:57,056 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 558 DAG size of output: 321 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:14,805 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 523 DAG size of output: 336 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:27,316 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 519 DAG size of output: 284 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:35,131 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 532 DAG size of output: 362 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:41,788 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 467 DAG size of output: 347 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:48,678 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 479 DAG size of output: 359 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:54,458 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 437 DAG size of output: 323 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:12:00,519 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 463 DAG size of output: 331 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:12:18,631 WARN L233 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 567 DAG size of output: 394 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:12:26,061 WARN L233 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 567 DAG size of output: 394 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:12:33,533 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 569 DAG size of output: 396 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:12:36,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2895#(and (= ~__ste_Client_Keyring1_User2~0 0) (= ~__GUIDSL_NON_TERMINAL_main~0 0) (<= |outgoing_getClientId_~retValue_acc~16#1| 2147483647) (= 0 |old(~__ste_email_isSignatureVerified1~0)|) (= ~__ste_email_isEncrypted1~0 0) (= ~__ste_email_subject0~0.offset 0) (= ~__SELECTED_FEATURE_Sign~0 0) (= 0 ~__ste_Client_AddressBook0_Address2~0) (= ~__ste_client_outbuffer3~0 0) (<= 1 |outgoing___utac_acc__SignForward_spec__1_~client#1|) (<= |outgoing___utac_acc__SignForward_spec__1_~msg#1| 1) (<= 1 |outgoing_mail_#in~client#1|) (<= |outgoing_mail_#in~msg#1| 1) (<= 0 (+ 2147483648 |outgoing_getClientId_#res#1|)) (= ~__ste_Client_counter~0 0) (= ~__ste_Client_Keyring1_PublicKey2~0 0) (= |outgoing___utac_acc__SignForward_spec__1_~tmp~9#1| 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_mail_~__utac__ad__arg2~0#1| 1) (= ~__ste_client_name2~0.offset 0) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_~client#1|) (= ~__ste_client_name1~0.base 0) (<= |outgoing___utac_acc__SignForward_spec__1_~client#1| 1) (<= 0 ~__ste_client_autoResponse1~0) (= ~__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)|) (<= ~__ste_client_idCounter2~0 3) (<= ~queued_message~0 0) (<= ~__ste_email_isSignatureVerified0~0 0) (<= 0 (+ |outgoing_sign_~privkey~0#1| 2147483648)) (= ~__ste_email_body1~0.offset 0) (= ~__SELECTED_FEATURE_Encrypt~0 0) (= ~__ste_Client_AddressBook1_Address2~0 0) (<= ~__ste_email_from0~0 2147483647) (= ~__ste_ClientAddressBook_size1~0 0) (= ~__ste_Client_Keyring0_PublicKey0~0 0) (<= 0 (+ |outgoing_getClientId_~retValue_acc~16#1| 2147483648)) (<= |outgoing_sign_~privkey~0#1| 2147483647) (= ~__ste_Email_counter~0 0) (<= 1 |outgoing___utac_acc__SignForward_spec__1_#in~client#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) (<= |outgoing___utac_acc__SignForward_spec__1_#in~client#1| 1) (= ~head~0.offset 0) (= ~__ste_client_name0~0.offset 0) (= |outgoing_#in~msg#1| 1) (<= |outgoing_sign_~tmp~20#1| 2147483647) (<= ~__ste_client_autoResponse1~0 1) (= ~__ste_Client_Keyring0_PublicKey2~0 0) (= |old(~queue_empty~0)| 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) (= ~__SELECTED_FEATURE_Decrypt~0 0) (<= 1 |outgoing_getClientId_~handle#1|) (<= 0 (+ ~__ste_email_signKey0~0 2147483648)) (= ~__ste_email_encryptionKey0~0 0) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1|) (<= 0 (+ 2147483648 |outgoing_sign_~tmp~20#1|)) (= ~__SELECTED_FEATURE_Keys~0 0) (<= ~__ste_email_signKey0~0 2147483647) (= |old(~__ste_email_isSigned0~0)| 0) (<= 1 |outgoing___utac_acc__SignForward_spec__1_~msg#1|) (= ~__SELECTED_FEATURE_AddressBook~0 0) (= ~__ste_client_forwardReceiver2~0 0) (= ~__ste_Client_Keyring0_PublicKey1~0 0) (= ~__SELECTED_FEATURE_Forward~0 0) (<= |outgoing___utac_acc__SignForward_spec__1_#in~msg#1| 1) (= ~__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) (= ~__ste_Client_AddressBook0_Alias0~0 0) (= ~__ste_email_id0~0 0) (<= ~__ste_client_autoResponse0~0 0) (= ~__ste_Client_Keyring2_User1~0 0) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_#in~client#1|) (<= |outgoing_mail_~__utac__ad__arg1~0#1| 1) (<= 1 |outgoing_mail_~__utac__ad__arg1~0#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) (<= 0 ~queued_message~0) (= ~__ste_Client_AddressBook1_Alias2~0 0) (<= 0 ~__ste_email_isSignatureVerified1~0) (= ~__ste_client_outbuffer0~0 0) (<= 789 ~__ste_client_privateKey2~0) (<= 1 |outgoing_sign_#in~client#1|) (<= |outgoing_getClientId_#in~handle#1| 1) (<= 1 |outgoing_sign_~msg#1|) (<= 1 |outgoing___utac_acc__SignForward_spec__1_#in~msg#1|) (<= 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) (= ~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___utac_acc__SignForward_spec__1_~tmp___0~3#1| 1) (= ~__ste_email_subject1~0.base 0) (= ~__ste_Client_AddressBook1_Alias0~0 0) (<= |outgoing_mail_#in~client#1| 1) (= ~__ste_Client_Keyring2_User2~0 0) (= ~head~0.base 0) (= ~__ste_Client_Keyring1_User1~0 0) (= |#NULL.offset| 0) (<= |outgoing_sign_#in~msg#1| 1) (= ~__ste_Client_AddressBook2_Alias2~0 0) (<= |outgoing_#in~client#1| 1) (<= 0 ~__ste_email_isSigned0~0) (<= 0 ~__ste_client_autoResponse2~0) (= ~__ste_email_subject1~0.offset 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp~14#1| 2147483647) (= ~__ste_Client_AddressBook0_Alias2~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1| 1) (= ~__ste_ClientKeyring_size0~0 0) (= ~__ste_email_isEncrypted0~0 0) (<= |outgoing_~msg#1| 1) (<= |outgoing_outgoing__wrappee__AutoResponder_~client#1| 1) (= ~__ste_Client_AddressBook1_Address1~0 0) (<= 0 (+ |outgoing_outgoing__wrappee__AutoResponder_~tmp~14#1| 2147483648)) (= 0 ~__ste_Client_AddressBook0_Address0~0) (= ~__ste_client_outbuffer1~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~msg#1| 1) (= |old(~__ste_email_isSigned1~0)| 0) (= ~__ste_Client_AddressBook0_Alias1~0 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) (<= 1 |outgoing_mail_~__utac__ad__arg2~0#1|) (= ~__ste_client_name0~0.base 0) (= ~__ste_email_id1~0 0) (= ~__ste_client_outbuffer2~0 0) (<= 0 (+ ~__ste_client_idCounter0~0 2147483648)) (<= 2 ~__ste_email_to0~0) (<= 0 |#StackHeapBarrier|) (<= ~__ste_email_to0~0 2) (<= 1 |outgoing_mail_~client#1|) (= ~__ste_ClientAddressBook_size2~0 0) (= ~__SELECTED_FEATURE_AutoResponder~0 0) (<= ~__ste_client_autoResponse2~0 0) (= ~__ste_email_encryptionKey1~0 0) (= ~__ste_email_body1~0.base 0) (= ~__ste_ClientKeyring_size2~0 0) (<= 0 |outgoing___utac_acc__SignForward_spec__1_~tmp___0~3#1|) (= |#NULL.base| 0) (<= ~queued_client~0 0))' at error location [2022-11-23 14:12:36,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:12:36,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:12:36,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:12:36,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273139151] [2022-11-23 14:12:36,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:36,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:12:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:36,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:12:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 14:12:36,163 INFO L87 Difference]: Start difference. First operand 210 states and 300 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 14:12:36,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:36,516 INFO L93 Difference]: Finished difference Result 542 states and 828 transitions. [2022-11-23 14:12:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:12:36,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 65 [2022-11-23 14:12:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:36,521 INFO L225 Difference]: With dead ends: 542 [2022-11-23 14:12:36,522 INFO L226 Difference]: Without dead ends: 460 [2022-11-23 14:12:36,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 189.6s TimeCoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 14:12:36,525 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 218 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:36,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 755 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:12:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-23 14:12:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 445. [2022-11-23 14:12:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 303 states have (on average 1.5148514851485149) internal successors, (459), 304 states have internal predecessors, (459), 123 states have call successors, (123), 18 states have call predecessors, (123), 18 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-11-23 14:12:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 704 transitions. [2022-11-23 14:12:36,571 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 704 transitions. Word has length 65 [2022-11-23 14:12:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:36,572 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 704 transitions. [2022-11-23 14:12:36,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 14:12:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 704 transitions. [2022-11-23 14:12:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 14:12:36,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:36,576 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:36,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:36,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556598c5-0daf-4e19-8021-ce428c1c66d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:36,788 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:36,789 INFO L85 PathProgramCache]: Analyzing trace with hash -601885139, now seen corresponding path program 1 times [2022-11-23 14:12:36,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:36,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770641593] [2022-11-23 14:12:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:36,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:12:36,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:36,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770641593] [2022-11-23 14:12:36,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770641593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:36,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:36,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:36,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639096389] [2022-11-23 14:12:36,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:36,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:36,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:36,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:36,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:12:36,958 INFO L87 Difference]: Start difference. First operand 445 states and 704 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:37,127 INFO L93 Difference]: Finished difference Result 1095 states and 1766 transitions. [2022-11-23 14:12:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:37,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 71 [2022-11-23 14:12:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:37,138 INFO L225 Difference]: With dead ends: 1095 [2022-11-23 14:12:37,139 INFO L226 Difference]: Without dead ends: 682 [2022-11-23 14:12:37,140 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 [2022-11-23 14:12:37,145 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 55 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:37,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 399 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-23 14:12:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 677. [2022-11-23 14:12:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 471 states have (on average 1.5329087048832273) internal successors, (722), 472 states have internal predecessors, (722), 187 states have call successors, (187), 18 states have call predecessors, (187), 18 states have return successors, (186), 186 states have call predecessors, (186), 186 states have call successors, (186) [2022-11-23 14:12:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1095 transitions. [2022-11-23 14:12:37,238 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1095 transitions. Word has length 71 [2022-11-23 14:12:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:37,240 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 1095 transitions. [2022-11-23 14:12:37,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1095 transitions. [2022-11-23 14:12:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 14:12:37,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:37,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:37,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:12:37,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:37,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2125861730, now seen corresponding path program 1 times [2022-11-23 14:12:37,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:37,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102083770] [2022-11-23 14:12:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:37,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:12:37,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:37,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102083770] [2022-11-23 14:12:37,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102083770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:37,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:37,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:37,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785848221] [2022-11-23 14:12:37,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:37,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:37,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:37,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:37,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:12:37,345 INFO L87 Difference]: Start difference. First operand 677 states and 1095 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:37,506 INFO L93 Difference]: Finished difference Result 1652 states and 2709 transitions. [2022-11-23 14:12:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:37,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2022-11-23 14:12:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:37,515 INFO L225 Difference]: With dead ends: 1652 [2022-11-23 14:12:37,515 INFO L226 Difference]: Without dead ends: 1037 [2022-11-23 14:12:37,517 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 [2022-11-23 14:12:37,520 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 53 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:37,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 391 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-11-23 14:12:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1032. [2022-11-23 14:12:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 731 states have (on average 1.5403556771545828) internal successors, (1126), 732 states have internal predecessors, (1126), 282 states have call successors, (282), 18 states have call predecessors, (282), 18 states have return successors, (281), 281 states have call predecessors, (281), 281 states have call successors, (281) [2022-11-23 14:12:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1689 transitions. [2022-11-23 14:12:37,625 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1689 transitions. Word has length 72 [2022-11-23 14:12:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:37,625 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1689 transitions. [2022-11-23 14:12:37,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1689 transitions. [2022-11-23 14:12:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:12:37,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:37,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:37,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:12:37,633 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:37,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash -788740453, now seen corresponding path program 1 times [2022-11-23 14:12:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:37,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410875530] [2022-11-23 14:12:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:37,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:12:37,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:37,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410875530] [2022-11-23 14:12:37,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410875530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:37,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:37,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:37,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032182645] [2022-11-23 14:12:37,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:37,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:37,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:37,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:12:37,718 INFO L87 Difference]: Start difference. First operand 1032 states and 1689 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:37,910 INFO L93 Difference]: Finished difference Result 2450 states and 4053 transitions. [2022-11-23 14:12:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:37,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-23 14:12:37,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:37,921 INFO L225 Difference]: With dead ends: 2450 [2022-11-23 14:12:37,921 INFO L226 Difference]: Without dead ends: 1560 [2022-11-23 14:12:37,925 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 [2022-11-23 14:12:37,928 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 51 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:37,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 384 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:37,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-11-23 14:12:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1555. [2022-11-23 14:12:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1131 states have (on average 1.5455349248452697) internal successors, (1748), 1132 states have internal predecessors, (1748), 405 states have call successors, (405), 18 states have call predecessors, (405), 18 states have return successors, (404), 404 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-23 14:12:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2557 transitions. [2022-11-23 14:12:38,039 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2557 transitions. Word has length 73 [2022-11-23 14:12:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:38,039 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2557 transitions. [2022-11-23 14:12:38,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2557 transitions. [2022-11-23 14:12:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:12:38,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:38,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:38,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:12:38,052 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:38,053 INFO L85 PathProgramCache]: Analyzing trace with hash -650312733, now seen corresponding path program 1 times [2022-11-23 14:12:38,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:38,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631879488] [2022-11-23 14:12:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:38,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:12:38,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631879488] [2022-11-23 14:12:38,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631879488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:38,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:38,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:38,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594736640] [2022-11-23 14:12:38,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:38,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:12:38,179 INFO L87 Difference]: Start difference. First operand 1555 states and 2557 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:38,411 INFO L93 Difference]: Finished difference Result 3660 states and 6081 transitions. [2022-11-23 14:12:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:38,412 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 74 [2022-11-23 14:12:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:38,429 INFO L225 Difference]: With dead ends: 3660 [2022-11-23 14:12:38,429 INFO L226 Difference]: Without dead ends: 2384 [2022-11-23 14:12:38,435 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 [2022-11-23 14:12:38,435 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 49 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:38,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 384 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2022-11-23 14:12:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2379. [2022-11-23 14:12:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 1776 states have (on average 1.5484234234234233) internal successors, (2750), 1777 states have internal predecessors, (2750), 584 states have call successors, (584), 18 states have call predecessors, (584), 18 states have return successors, (583), 583 states have call predecessors, (583), 583 states have call successors, (583) [2022-11-23 14:12:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3917 transitions. [2022-11-23 14:12:38,658 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 3917 transitions. Word has length 74 [2022-11-23 14:12:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:38,658 INFO L495 AbstractCegarLoop]: Abstraction has 2379 states and 3917 transitions. [2022-11-23 14:12:38,659 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 3917 transitions. [2022-11-23 14:12:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 14:12:38,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:38,666 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:38,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:12:38,666 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash -139032393, now seen corresponding path program 1 times [2022-11-23 14:12:38,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:38,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679666835] [2022-11-23 14:12:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:38,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:12:38,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679666835] [2022-11-23 14:12:38,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679666835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:38,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:38,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:38,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295939909] [2022-11-23 14:12:38,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:38,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:38,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:12:38,749 INFO L87 Difference]: Start difference. First operand 2379 states and 3917 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:39,069 INFO L93 Difference]: Finished difference Result 5871 states and 9753 transitions. [2022-11-23 14:12:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:39,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 75 [2022-11-23 14:12:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:39,093 INFO L225 Difference]: With dead ends: 5871 [2022-11-23 14:12:39,094 INFO L226 Difference]: Without dead ends: 3914 [2022-11-23 14:12:39,102 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 [2022-11-23 14:12:39,102 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 47 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:39,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 399 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2022-11-23 14:12:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3909. [2022-11-23 14:12:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 2930 states have (on average 1.5375426621160408) internal successors, (4505), 2931 states have internal predecessors, (4505), 960 states have call successors, (960), 18 states have call predecessors, (960), 18 states have return successors, (959), 959 states have call predecessors, (959), 959 states have call successors, (959) [2022-11-23 14:12:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 6424 transitions. [2022-11-23 14:12:39,459 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 6424 transitions. Word has length 75 [2022-11-23 14:12:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:39,460 INFO L495 AbstractCegarLoop]: Abstraction has 3909 states and 6424 transitions. [2022-11-23 14:12:39,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 6424 transitions. [2022-11-23 14:12:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-23 14:12:39,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:39,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:39,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:12:39,471 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:39,471 INFO L85 PathProgramCache]: Analyzing trace with hash 348516807, now seen corresponding path program 1 times [2022-11-23 14:12:39,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:39,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418023627] [2022-11-23 14:12:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:39,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:12:39,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:39,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418023627] [2022-11-23 14:12:39,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418023627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:39,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:39,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:39,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856723401] [2022-11-23 14:12:39,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:39,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:39,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:12:39,551 INFO L87 Difference]: Start difference. First operand 3909 states and 6424 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:40,082 INFO L93 Difference]: Finished difference Result 9732 states and 16150 transitions. [2022-11-23 14:12:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:40,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 76 [2022-11-23 14:12:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:40,117 INFO L225 Difference]: With dead ends: 9732 [2022-11-23 14:12:40,117 INFO L226 Difference]: Without dead ends: 6511 [2022-11-23 14:12:40,127 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 [2022-11-23 14:12:40,128 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 45 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:40,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 389 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6511 states. [2022-11-23 14:12:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6511 to 6506. [2022-11-23 14:12:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6506 states, 4921 states have (on average 1.5334281650071124) internal successors, (7546), 4922 states have internal predecessors, (7546), 1566 states have call successors, (1566), 18 states have call predecessors, (1566), 18 states have return successors, (1565), 1565 states have call predecessors, (1565), 1565 states have call successors, (1565) [2022-11-23 14:12:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 10677 transitions. [2022-11-23 14:12:40,707 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 10677 transitions. Word has length 76 [2022-11-23 14:12:40,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:40,708 INFO L495 AbstractCegarLoop]: Abstraction has 6506 states and 10677 transitions. [2022-11-23 14:12:40,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 10677 transitions. [2022-11-23 14:12:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 14:12:40,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:40,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:40,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:12:40,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1803938693, now seen corresponding path program 1 times [2022-11-23 14:12:40,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:40,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20621171] [2022-11-23 14:12:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:40,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:12:40,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:40,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20621171] [2022-11-23 14:12:40,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20621171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:40,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:40,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:40,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081673509] [2022-11-23 14:12:40,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:40,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:40,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:40,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:40,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:12:40,832 INFO L87 Difference]: Start difference. First operand 6506 states and 10677 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:41,776 INFO L93 Difference]: Finished difference Result 16984 states and 28068 transitions. [2022-11-23 14:12:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 77 [2022-11-23 14:12:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:41,858 INFO L225 Difference]: With dead ends: 16984 [2022-11-23 14:12:41,858 INFO L226 Difference]: Without dead ends: 11455 [2022-11-23 14:12:41,878 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 [2022-11-23 14:12:41,879 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 43 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:41,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 401 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11455 states. [2022-11-23 14:12:42,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11455 to 11450. [2022-11-23 14:12:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11450 states, 8662 states have (on average 1.5200877395520664) internal successors, (13167), 8663 states have internal predecessors, (13167), 2769 states have call successors, (2769), 18 states have call predecessors, (2769), 18 states have return successors, (2768), 2768 states have call predecessors, (2768), 2768 states have call successors, (2768) [2022-11-23 14:12:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11450 states to 11450 states and 18704 transitions. [2022-11-23 14:12:42,920 INFO L78 Accepts]: Start accepts. Automaton has 11450 states and 18704 transitions. Word has length 77 [2022-11-23 14:12:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:42,920 INFO L495 AbstractCegarLoop]: Abstraction has 11450 states and 18704 transitions. [2022-11-23 14:12:42,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 11450 states and 18704 transitions. [2022-11-23 14:12:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 14:12:42,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:42,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:42,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:12:42,937 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1104442520, now seen corresponding path program 1 times [2022-11-23 14:12:42,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:42,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145817685] [2022-11-23 14:12:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:42,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:12:43,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:43,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145817685] [2022-11-23 14:12:43,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145817685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:43,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:43,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:43,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240493381] [2022-11-23 14:12:43,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:43,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:43,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:43,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:43,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:12:43,031 INFO L87 Difference]: Start difference. First operand 11450 states and 18704 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:44,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:44,737 INFO L93 Difference]: Finished difference Result 30303 states and 49834 transitions. [2022-11-23 14:12:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:44,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 78 [2022-11-23 14:12:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:44,836 INFO L225 Difference]: With dead ends: 30303 [2022-11-23 14:12:44,837 INFO L226 Difference]: Without dead ends: 20282 [2022-11-23 14:12:44,880 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 [2022-11-23 14:12:44,881 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 41 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:44,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 389 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20282 states. [2022-11-23 14:12:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20282 to 20277. [2022-11-23 14:12:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20277 states, 15450 states have (on average 1.5123624595469256) internal successors, (23366), 15451 states have internal predecessors, (23366), 4808 states have call successors, (4808), 18 states have call predecessors, (4808), 18 states have return successors, (4807), 4807 states have call predecessors, (4807), 4807 states have call successors, (4807) [2022-11-23 14:12:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20277 states to 20277 states and 32981 transitions. [2022-11-23 14:12:46,775 INFO L78 Accepts]: Start accepts. Automaton has 20277 states and 32981 transitions. Word has length 78 [2022-11-23 14:12:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:46,777 INFO L495 AbstractCegarLoop]: Abstraction has 20277 states and 32981 transitions. [2022-11-23 14:12:46,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20277 states and 32981 transitions. [2022-11-23 14:12:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 14:12:46,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:46,793 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:46,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:12:46,794 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:46,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2059508935, now seen corresponding path program 1 times [2022-11-23 14:12:46,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:46,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336252095] [2022-11-23 14:12:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:46,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:12:46,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:46,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336252095] [2022-11-23 14:12:46,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336252095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:46,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:46,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:46,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246245537] [2022-11-23 14:12:46,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:46,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:46,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:46,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:46,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:12:46,892 INFO L87 Difference]: Start difference. First operand 20277 states and 32981 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:49,565 INFO L93 Difference]: Finished difference Result 55015 states and 89926 transitions. [2022-11-23 14:12:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:49,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 79 [2022-11-23 14:12:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:49,742 INFO L225 Difference]: With dead ends: 55015 [2022-11-23 14:12:49,743 INFO L226 Difference]: Without dead ends: 36722 [2022-11-23 14:12:49,800 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 [2022-11-23 14:12:49,801 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 39 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:49,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 389 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36722 states. [2022-11-23 14:12:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36722 to 36717. [2022-11-23 14:12:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36717 states, 28175 states have (on average 1.5016858917480036) internal successors, (42310), 28176 states have internal predecessors, (42310), 8523 states have call successors, (8523), 18 states have call predecessors, (8523), 18 states have return successors, (8522), 8522 states have call predecessors, (8522), 8522 states have call successors, (8522) [2022-11-23 14:12:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36717 states to 36717 states and 59355 transitions. [2022-11-23 14:12:53,650 INFO L78 Accepts]: Start accepts. Automaton has 36717 states and 59355 transitions. Word has length 79 [2022-11-23 14:12:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:53,651 INFO L495 AbstractCegarLoop]: Abstraction has 36717 states and 59355 transitions. [2022-11-23 14:12:53,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 36717 states and 59355 transitions. [2022-11-23 14:12:53,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 14:12:53,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:53,672 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:53,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:12:53,673 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2017698392, now seen corresponding path program 1 times [2022-11-23 14:12:53,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:53,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396585333] [2022-11-23 14:12:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:53,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:12:53,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:53,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396585333] [2022-11-23 14:12:53,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396585333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:53,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:53,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:53,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236507294] [2022-11-23 14:12:53,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:53,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:12:53,781 INFO L87 Difference]: Start difference. First operand 36717 states and 59355 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:12:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:57,632 INFO L93 Difference]: Finished difference Result 67632 states and 109507 transitions. [2022-11-23 14:12:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 80 [2022-11-23 14:12:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:57,930 INFO L225 Difference]: With dead ends: 67632 [2022-11-23 14:12:57,930 INFO L226 Difference]: Without dead ends: 67550 [2022-11-23 14:12:57,955 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 [2022-11-23 14:12:57,955 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 37 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:57,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 389 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67550 states. [2022-11-23 14:13:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67550 to 67545. [2022-11-23 14:13:02,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67545 states, 52204 states have (on average 1.4877404030342503) internal successors, (77666), 52205 states have internal predecessors, (77666), 15322 states have call successors, (15322), 18 states have call predecessors, (15322), 18 states have return successors, (15321), 15321 states have call predecessors, (15321), 15321 states have call successors, (15321) [2022-11-23 14:13:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67545 states to 67545 states and 108309 transitions. [2022-11-23 14:13:02,663 INFO L78 Accepts]: Start accepts. Automaton has 67545 states and 108309 transitions. Word has length 80 [2022-11-23 14:13:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:02,663 INFO L495 AbstractCegarLoop]: Abstraction has 67545 states and 108309 transitions. [2022-11-23 14:13:02,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:13:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 67545 states and 108309 transitions. [2022-11-23 14:13:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:13:02,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:02,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:02,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:13:02,683 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:13:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1832088922, now seen corresponding path program 1 times [2022-11-23 14:13:02,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:13:02,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156080615] [2022-11-23 14:13:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:02,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:13:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:13:04,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:13:04,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156080615] [2022-11-23 14:13:04,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156080615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:04,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:04,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-23 14:13:04,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153618112] [2022-11-23 14:13:04,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:04,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 14:13:04,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:13:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 14:13:04,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:13:04,126 INFO L87 Difference]: Start difference. First operand 67545 states and 108309 transitions. Second operand has 19 states, 13 states have (on average 3.769230769230769) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-23 14:13:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:10,553 INFO L93 Difference]: Finished difference Result 67681 states and 108505 transitions. [2022-11-23 14:13:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 14:13:10,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 3.769230769230769) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 81 [2022-11-23 14:13:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:11,124 INFO L225 Difference]: With dead ends: 67681 [2022-11-23 14:13:11,124 INFO L226 Difference]: Without dead ends: 67601 [2022-11-23 14:13:11,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:13:11,151 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 395 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 2199 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:11,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 2199 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 14:13:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67601 states.