./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V --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 80e9bbe10488e38c848fee2c8f87fc84d027f309ec95e867f80c828929ca07a3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:47:52,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:47:52,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:47:52,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:47:52,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:47:52,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:47:52,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:47:52,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:47:52,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:47:52,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:47:52,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:47:52,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:47:52,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:47:52,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:47:52,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:47:52,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:47:52,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:47:52,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:47:52,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:47:52,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:47:52,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:47:52,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:47:52,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:47:52,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:47:52,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:47:52,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:47:52,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:47:52,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:47:52,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:47:52,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:47:52,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:47:52,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:47:52,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:47:52,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:47:52,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:47:52,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:47:52,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:47:52,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:47:52,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:47:52,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:47:52,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:47:52,820 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:47:52,876 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:47:52,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:47:52,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:47:52,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:47:52,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:47:52,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:47:52,879 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:47:52,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:47:52,880 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:47:52,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:47:52,882 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:47:52,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:47:52,882 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:47:52,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:47:52,883 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:47:52,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:47:52,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:47:52,884 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:47:52,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:47:52,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:47:52,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:47:52,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:47:52,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:47:52,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:47:52,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:47:52,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:47:52,889 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:47:52,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:47:52,890 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:47:52,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:47:52,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:47:52,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:47:52,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:52,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:47:52,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:47:52,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:47:52,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:47:52,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:47:52,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:47:52,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:47:52,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:47:52,894 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80e9bbe10488e38c848fee2c8f87fc84d027f309ec95e867f80c828929ca07a3 [2021-11-23 03:47:53,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:47:53,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:47:53,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:47:53,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:47:53,335 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:47:53,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c [2021-11-23 03:47:53,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/data/ea4323746/800d4a092f784f7c822bad0736b4124f/FLAGcc39e7f6f [2021-11-23 03:47:54,097 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:47:54,098 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c [2021-11-23 03:47:54,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/data/ea4323746/800d4a092f784f7c822bad0736b4124f/FLAGcc39e7f6f [2021-11-23 03:47:54,300 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/data/ea4323746/800d4a092f784f7c822bad0736b4124f [2021-11-23 03:47:54,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:47:54,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:47:54,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:54,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:47:54,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:47:54,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:54" (1/1) ... [2021-11-23 03:47:54,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb0ed9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:54, skipping insertion in model container [2021-11-23 03:47:54,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:54" (1/1) ... [2021-11-23 03:47:54,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:47:54,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:47:55,028 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c[64112,64125] [2021-11-23 03:47:55,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:55,046 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:47:55,211 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c[64112,64125] [2021-11-23 03:47:55,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:55,270 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:47:55,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55 WrapperNode [2021-11-23 03:47:55,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:55,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:47:55,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:47:55,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:47:55,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (1/1) ... [2021-11-23 03:47:55,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (1/1) ... [2021-11-23 03:47:55,433 INFO L137 Inliner]: procedures = 131, calls = 218, calls flagged for inlining = 60, calls inlined = 50, statements flattened = 909 [2021-11-23 03:47:55,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:47:55,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:47:55,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:47:55,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:47:55,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (1/1) ... [2021-11-23 03:47:55,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (1/1) ... [2021-11-23 03:47:55,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (1/1) ... [2021-11-23 03:47:55,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (1/1) ... [2021-11-23 03:47:55,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (1/1) ... [2021-11-23 03:47:55,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (1/1) ... [2021-11-23 03:47:55,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (1/1) ... [2021-11-23 03:47:55,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:47:55,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:47:55,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:47:55,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:47:55,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (1/1) ... [2021-11-23 03:47:55,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:55,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:47:55,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:47:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-23 03:47:55,681 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-23 03:47:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-23 03:47:55,682 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-23 03:47:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-23 03:47:55,682 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-23 03:47:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-23 03:47:55,682 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-23 03:47:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-23 03:47:55,683 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-23 03:47:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-23 03:47:55,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-23 03:47:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-23 03:47:55,683 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-23 03:47:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-23 03:47:55,684 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-23 03:47:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-23 03:47:55,684 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-23 03:47:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-23 03:47:55,684 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-23 03:47:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 03:47:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-23 03:47:55,685 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-23 03:47:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-23 03:47:55,685 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-23 03:47:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:47:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-23 03:47:55,686 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-23 03:47:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-23 03:47:55,686 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-23 03:47:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-23 03:47:55,687 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-23 03:47:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-23 03:47:55,687 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-23 03:47:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-23 03:47:55,687 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-23 03:47:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-23 03:47:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-23 03:47:55,688 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-23 03:47:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-23 03:47:55,688 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-23 03:47:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-23 03:47:55,688 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-23 03:47:55,689 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-23 03:47:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-23 03:47:55,689 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-23 03:47:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:47:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-23 03:47:55,691 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-23 03:47:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:47:55,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:47:56,058 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:47:56,060 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:47:57,080 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:47:57,581 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:47:57,582 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:47:57,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:57 BoogieIcfgContainer [2021-11-23 03:47:57,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:47:57,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:47:57,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:47:57,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:47:57,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:47:54" (1/3) ... [2021-11-23 03:47:57,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10185d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:57, skipping insertion in model container [2021-11-23 03:47:57,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:55" (2/3) ... [2021-11-23 03:47:57,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10185d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:57, skipping insertion in model container [2021-11-23 03:47:57,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:57" (3/3) ... [2021-11-23 03:47:57,599 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product30.cil.c [2021-11-23 03:47:57,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:47:57,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:47:57,699 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:47:57,711 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:47:57,712 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:47:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 111 states have (on average 1.3333333333333333) internal successors, (148), 115 states have internal predecessors, (148), 53 states have call successors, (53), 23 states have call predecessors, (53), 23 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-11-23 03:47:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 03:47:57,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:57,780 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:47:57,781 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:57,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:57,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1921470385, now seen corresponding path program 1 times [2021-11-23 03:47:57,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:57,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929586056] [2021-11-23 03:47:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:57,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:47:58,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:58,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929586056] [2021-11-23 03:47:58,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929586056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:58,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:58,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:47:58,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692367013] [2021-11-23 03:47:58,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:58,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:47:58,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:58,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:47:58,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:47:58,287 INFO L87 Difference]: Start difference. First operand has 189 states, 111 states have (on average 1.3333333333333333) internal successors, (148), 115 states have internal predecessors, (148), 53 states have call successors, (53), 23 states have call predecessors, (53), 23 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:47:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:58,505 INFO L93 Difference]: Finished difference Result 295 states and 386 transitions. [2021-11-23 03:47:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:47:58,508 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 68 [2021-11-23 03:47:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:58,532 INFO L225 Difference]: With dead ends: 295 [2021-11-23 03:47:58,532 INFO L226 Difference]: Without dead ends: 186 [2021-11-23 03:47:58,543 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:47:58,549 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:58,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 217 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:47:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-23 03:47:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-11-23 03:47:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 112 states have internal predecessors, (142), 53 states have call successors, (53), 23 states have call predecessors, (53), 23 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-23 03:47:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 247 transitions. [2021-11-23 03:47:58,663 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 247 transitions. Word has length 68 [2021-11-23 03:47:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:58,665 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 247 transitions. [2021-11-23 03:47:58,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:47:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 247 transitions. [2021-11-23 03:47:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 03:47:58,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:58,682 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:47:58,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:47:58,683 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash 694161, now seen corresponding path program 1 times [2021-11-23 03:47:58,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:58,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535155464] [2021-11-23 03:47:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:58,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:47:58,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:58,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535155464] [2021-11-23 03:47:58,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535155464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:58,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:58,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:47:58,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626841194] [2021-11-23 03:47:58,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:58,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:47:58,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:58,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:47:58,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:58,895 INFO L87 Difference]: Start difference. First operand 186 states and 247 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:47:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:59,082 INFO L93 Difference]: Finished difference Result 291 states and 374 transitions. [2021-11-23 03:47:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:47:59,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 69 [2021-11-23 03:47:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:59,088 INFO L225 Difference]: With dead ends: 291 [2021-11-23 03:47:59,088 INFO L226 Difference]: Without dead ends: 188 [2021-11-23 03:47:59,090 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:47:59,092 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 0 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:59,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 427 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:47:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-23 03:47:59,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-23 03:47:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 114 states have internal predecessors, (144), 53 states have call successors, (53), 23 states have call predecessors, (53), 23 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-23 03:47:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 249 transitions. [2021-11-23 03:47:59,122 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 249 transitions. Word has length 69 [2021-11-23 03:47:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:59,123 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 249 transitions. [2021-11-23 03:47:59,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:47:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 249 transitions. [2021-11-23 03:47:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 03:47:59,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:59,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:59,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:47:59,127 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 80934024, now seen corresponding path program 1 times [2021-11-23 03:47:59,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:59,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249884601] [2021-11-23 03:47:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:59,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:47:59,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:59,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249884601] [2021-11-23 03:47:59,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249884601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:59,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:59,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:47:59,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768505779] [2021-11-23 03:47:59,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:59,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:47:59,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:59,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:47:59,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:59,289 INFO L87 Difference]: Start difference. First operand 188 states and 249 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:47:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:59,454 INFO L93 Difference]: Finished difference Result 406 states and 557 transitions. [2021-11-23 03:47:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:47:59,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 74 [2021-11-23 03:47:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:59,462 INFO L225 Difference]: With dead ends: 406 [2021-11-23 03:47:59,462 INFO L226 Difference]: Without dead ends: 236 [2021-11-23 03:47:59,463 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:47:59,472 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 57 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:59,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 439 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:47:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-23 03:47:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 231. [2021-11-23 03:47:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 143 states have (on average 1.3776223776223777) internal successors, (197), 146 states have internal predecessors, (197), 64 states have call successors, (64), 23 states have call predecessors, (64), 23 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2021-11-23 03:47:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 324 transitions. [2021-11-23 03:47:59,568 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 324 transitions. Word has length 74 [2021-11-23 03:47:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:59,569 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 324 transitions. [2021-11-23 03:47:59,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:47:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 324 transitions. [2021-11-23 03:47:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 03:47:59,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:59,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:59,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:47:59,573 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2121245715, now seen corresponding path program 1 times [2021-11-23 03:47:59,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:59,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465712136] [2021-11-23 03:47:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:59,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:47:59,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:59,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465712136] [2021-11-23 03:47:59,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465712136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:59,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550930783] [2021-11-23 03:47:59,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:59,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:59,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:59,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:59,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:48:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:00,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:48:00,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:48:00,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:48:00,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550930783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:48:00,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162933445] [2021-11-23 03:48:00,543 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2021-11-23 03:48:00,545 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:48:00,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:48:00,561 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:48:00,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:48:38,053 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 439 for LOIs [2021-11-23 03:48:38,347 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2021-11-23 03:48:38,594 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 267 for LOIs [2021-11-23 03:48:40,752 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 237 for LOIs [2021-11-23 03:48:40,794 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 269 for LOIs [2021-11-23 03:49:00,609 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 450 for LOIs [2021-11-23 03:49:01,100 INFO L197 IcfgInterpreter]: Interpreting procedure findPublicKey with input of size 249 for LOIs [2021-11-23 03:49:01,200 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 254 for LOIs [2021-11-23 03:49:01,279 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 473 for LOIs [2021-11-23 03:49:02,823 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 251 for LOIs [2021-11-23 03:49:02,899 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:49:09,842 WARN L227 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 611 DAG size of output: 438 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:49:51,195 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 508 DAG size of output: 385 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:49:56,780 WARN L227 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 561 DAG size of output: 365 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:50:02,445 WARN L227 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 563 DAG size of output: 367 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:50:21,253 WARN L227 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 554 DAG size of output: 353 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:50:30,565 WARN L227 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 473 DAG size of output: 279 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:50:56,953 WARN L227 SmtUtils]: Spent 10.20s on a formula simplification. DAG size of input: 450 DAG size of output: 344 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:51:09,527 WARN L227 SmtUtils]: Spent 10.64s on a formula simplification. DAG size of input: 476 DAG size of output: 353 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:51:46,584 WARN L227 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 604 DAG size of output: 421 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:51:53,737 WARN L227 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 600 DAG size of output: 427 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:04,740 WARN L227 SmtUtils]: Spent 7.75s on a formula simplification. DAG size of input: 611 DAG size of output: 415 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:11,316 WARN L227 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 614 DAG size of output: 419 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:11,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3210#(and (= ~__GUIDSL_NON_TERMINAL_main~0 0) (= |old(~__ste_email_encryptionKey0~0)| 0) (<= 1 |outgoing_outgoing__wrappee__Keys_~msg#1|) (<= |outgoing_outgoing__wrappee__AutoResponder_~receiver~0#1| 2) (<= 0 ~__ste_email_encryptionKey1~0) (= ~__SELECTED_FEATURE_Sign~0 0) (= ~__ste_client_outbuffer3~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp~2#1| 2) (<= 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_privateKey0~0 |outgoing___utac_acc__SignForward_spec__1_~tmp~23#1|) (<= ~__ste_email_encryptionKey1~0 0) (<= ~__ste_email_isSignatureVerified1~0 0) (<= |old(~__ste_email_to0~0)| 2) (= ~__ste_Client_AddressBook2_Alias0~0 0) (= 0 ~__ste_email_subject0~0.base) (<= |outgoing_outgoing__wrappee__Keys_~tmp~1#1| 2147483647) (<= 1 |outgoing_sign_~client#1|) (<= 1 |outgoing_mail_~msg#1|) (= ~__ste_Client_AddressBook2_Alias1~0 0) (= ~__ste_Client_Keyring2_PublicKey2~0 0) (<= |outgoing_mail_~__utac__ad__arg2~0#1| 1) (<= |outgoing_sign_~privkey~1#1| 2147483647) (= ~__ste_client_name2~0.offset 0) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_~client#1|) (<= |outgoing___utac_acc__SignForward_spec__1_~client#1| 1) (<= 0 ~__ste_client_autoResponse1~0) (<= |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) (= ~__SELECTED_FEATURE_Encrypt~0 0) (= ~__ste_Client_AddressBook1_Address2~0 0) (<= ~__ste_email_from0~0 2147483647) (= ~__ste_ClientAddressBook_size1~0 0) (<= 1 |outgoing___utac_acc__SignForward_spec__1_#in~client#1|) (<= |outgoing_sign_~client#1| 1) (= ~__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) (= |outgoing_#in~msg#1| 1) (<= 1 |outgoing_outgoing__wrappee__Keys_~client#1|) (<= ~__ste_client_autoResponse1~0 1) (= ~__ste_Client_Keyring0_PublicKey2~0 0) (<= ~__ste_Email_counter~0 0) (<= ~__ste_Client_Keyring2_User2~0 0) (<= ~__ste_email_body1~0.offset 0) (<= ~__ste_client_privateKey2~0 789) (= ~__ste_Client_Keyring1_PublicKey0~0 0) (= |old(~__ste_email_from0~0)| 0) (<= |outgoing_sign_#in~client#1| 1) (<= 0 |outgoing___utac_acc__SignForward_spec__1_~tmp___0~8#1|) (<= 1 |old(~queue_empty~0)|) (<= ~queue_empty~0 1) (<= 0 ~__ste_Client_Keyring2_User2~0) (= ~__SELECTED_FEATURE_Decrypt~0 0) (<= 1 |outgoing_getClientId_~handle#1|) (<= 0 ~__ste_Client_Keyring1_User2~0) (<= 0 (+ ~__ste_email_signKey0~0 2147483648)) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1|) (<= 0 |outgoing_outgoing__wrappee__AutoResponder_~tmp___0~0#1|) (<= 0 ~__ste_email_isEncrypted1~0) (= ~__SELECTED_FEATURE_Keys~0 0) (<= ~__ste_email_signKey0~0 2147483647) (= |old(~__ste_email_isSigned0~0)| 0) (<= |#NULL.offset| 0) (<= 0 ~__ste_Client_Keyring1_User0~0) (<= 1 |outgoing___utac_acc__SignForward_spec__1_~msg#1|) (<= 0 ~__SELECTED_FEATURE_AddressBook~0) (= ~__ste_Client_Keyring0_PublicKey1~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_~tmp___0~0#1| 0) (= ~__SELECTED_FEATURE_Forward~0 0) (<= |outgoing___utac_acc__SignForward_spec__1_#in~msg#1| 1) (<= 0 ~__ste_email_isEncrypted0~0) (= ~__ste_Client_Keyring0_User0~0 0) (<= 0 |old(~__ste_email_signKey0~0)|) (<= 1 |outgoing_mail_#in~msg#1|) (<= ~__ste_client_idCounter0~0 2147483647) (= ~__ste_Client_Keyring2_PublicKey1~0 0) (<= 0 ~__ste_email_id1~0) (<= ~__ste_Client_AddressBook0_Address1~0 0) (= ~__ste_email_body0~0.base 0) (<= ~__ste_email_isSigned0~0 1) (<= ~__ste_email_isEncrypted0~0 0) (<= 0 (+ |outgoing_sign_~tmp~8#1| 2147483648)) (= ~__ste_Client_AddressBook0_Alias0~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~msg#1|) (<= 0 ~__ste_Client_AddressBook2_Address1~0) (<= 0 ~__ste_client_name0~0.offset) (<= 0 (+ |outgoing_outgoing__wrappee__Keys_~tmp~1#1| 2147483648)) (<= ~__ste_Client_Keyring0_PublicKey0~0 0) (<= ~__ste_client_name1~0.base 0) (= ~__ste_email_id0~0 0) (<= ~__ste_client_autoResponse0~0 0) (<= ~__SELECTED_FEATURE_AddressBook~0 0) (<= ~__ste_Client_Keyring1_PublicKey2~0 0) (<= 0 ~__ste_Client_Keyring0_PublicKey0~0) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_#in~client#1|) (<= |outgoing_mail_~__utac__ad__arg1~0#1| 1) (<= 1 |outgoing_mail_~__utac__ad__arg1~0#1|) (<= ~__ste_client_forwardReceiver3~0 0) (<= 3 ~__ste_client_idCounter2~0) (= ~__ste_Client_AddressBook2_Address2~0 0) (<= 0 ~__ste_Client_Keyring1_PublicKey2~0) (<= ~__ste_Client_AddressBook0_Address0~0 0) (= 3 ~chuck~0) (<= 0 ~__ste_email_signKey1~0) (<= 0 ~__ste_email_body1~0.offset) (<= 1 ~queue_empty~0) (<= ~__ste_email_signKey1~0 0) (<= 0 ~__ste_client_forwardReceiver3~0) (<= ~__ste_email_isSigned1~0 0) (<= 0 ~__ste_Email_counter~0) (<= ~__ste_email_subject0~0.offset 0) (<= |old(~__ste_email_signKey0~0)| 0) (<= 0 ~__ste_client_autoResponse0~0) (<= 0 (+ |outgoing_getClientId_~retValue_acc~28#1| 2147483648)) (<= 0 ~__ste_Client_AddressBook0_Alias2~0) (<= 0 ~queued_message~0) (<= 0 |old(~__ste_email_isSignatureVerified0~0)|) (<= 0 ~__ste_email_isSignatureVerified1~0) (= |old(~__ste_email_isEncrypted0~0)| 0) (= ~__ste_client_outbuffer0~0 0) (<= |outgoing_outgoing__wrappee__Keys_~client#1| 1) (<= 789 ~__ste_client_privateKey2~0) (<= ~__SELECTED_FEATURE_Verify~0 0) (<= 1 |outgoing_sign_#in~client#1|) (<= |outgoing_getClientId_#in~handle#1| 1) (<= 1 |outgoing_sign_~msg#1|) (<= ~__ste_ClientKeyring_size1~0 0) (<= ~__ste_Client_Keyring1_User2~0 0) (<= |outgoing___utac_acc__SignForward_spec__1_~tmp___0~8#1| 1) (<= 1 |outgoing___utac_acc__SignForward_spec__1_#in~msg#1|) (<= 0 ~head~0.base) (<= 1 |outgoing_~msg#1|) (= ~__SELECTED_FEATURE_Base~0 0) (<= ~__ste_Client_AddressBook1_Alias2~0 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~client#1| 1) (<= 0 ~__ste_Client_AddressBook0_Address2~0) (= ~__ste_client_forwardReceiver0~0 0) (<= |outgoing_mail_~client#1| 1) (= ~__ste_Client_Keyring2_User0~0 0) (<= 0 ~__ste_email_subject0~0.offset) (= |outgoing_outgoing__wrappee__AutoResponder_~pubkey~0#1| 0) (= ~rjh~0 2) (<= 0 ~__ste_Client_AddressBook1_Alias0~0) (= ~__ste_Client_AddressBook2_Address0~0 0) (= ~__ste_Client_Keyring1_PublicKey1~0 0) (<= 0 ~queued_client~0) (= |old(~queued_message~0)| 0) (<= ~__ste_Client_AddressBook1_Alias0~0 0) (= ~__ste_Client_Keyring2_PublicKey0~0 0) (<= 0 ~__ste_email_isSignatureVerified0~0) (= ~__ste_Client_AddressBook1_Address0~0 0) (<= 0 ~__ste_ClientKeyring_size1~0) (<= |outgoing_sign_~tmp~8#1| 2147483647) (<= 0 ~__ste_client_forwardReceiver2~0) (= ~__ste_client_name2~0.base 0) (<= 0 ~__ste_Client_AddressBook0_Address1~0) (<= |outgoing_mail_~msg#1| 1) (= |old(~queued_client~0)| 0) (<= ~__ste_email_encryptionKey0~0 0) (= ~__ste_email_subject1~0.base 0) (<= ~__ste_ClientKeyring_size0~0 0) (<= ~__ste_email_id1~0 0) (<= |old(~queue_empty~0)| 1) (<= 0 ~__ste_Client_AddressBook0_Address0~0) (<= ~__ste_Client_Keyring1_User0~0 0) (<= |outgoing_mail_#in~client#1| 1) (<= ~__ste_Client_AddressBook0_Alias2~0 0) (<= |outgoing_outgoing__wrappee__Keys_#in~client#1| 1) (<= ~__ste_Client_AddressBook0_Address2~0 0) (not (= |outgoing___utac_acc__SignForward_spec__1_~tmp___0~8#1| 0)) (<= 2 |outgoing_outgoing__wrappee__AutoResponder_~receiver~0#1|) (<= ~head~0.base 0) (<= ~__ste_client_forwardReceiver1~0 0) (= ~__ste_Client_Keyring1_User1~0 0) (<= |outgoing_sign_#in~msg#1| 1) (<= |old(~__ste_email_isSigned1~0)| 0) (= ~__ste_Client_AddressBook2_Alias2~0 0) (<= |outgoing_#in~client#1| 1) (<= 0 (+ |outgoing_sign_~privkey~1#1| 2147483648)) (<= ~__ste_Client_Keyring2_User1~0 0) (<= 0 ~__ste_email_isSigned0~0) (<= 0 ~__SELECTED_FEATURE_Verify~0) (<= 0 ~__ste_Client_AddressBook1_Alias2~0) (<= 0 ~__ste_client_autoResponse2~0) (= ~__ste_email_subject1~0.offset 0) (<= |outgoing_outgoing__wrappee__AutoResponder_#in~msg#1| 1) (<= 0 ~__ste_Client_Keyring2_User1~0) (<= |outgoing_~msg#1| 1) (<= |outgoing_outgoing__wrappee__AutoResponder_~client#1| 1) (= ~__ste_Client_AddressBook1_Address1~0 0) (<= |outgoing_outgoing__wrappee__Keys_~msg#1| 1) (<= ~__ste_client_name0~0.offset 0) (= ~__ste_client_outbuffer1~0 0) (<= |outgoing_getClientId_~retValue_acc~28#1| 2147483647) (<= |outgoing_outgoing__wrappee__AutoResponder_~msg#1| 1) (= ~__ste_Client_AddressBook0_Alias1~0 0) (<= 0 ~__ste_ClientKeyring_size0~0) (<= ~__ste_email_isEncrypted1~0 0) (= |old(~__ste_email_isEncrypted1~0)| 0) (<= 1 |outgoing_getClientId_#in~handle#1|) (<= |old(~__ste_email_isSignatureVerified0~0)| 0) (= ~__GUIDSL_ROOT_PRODUCTION~0 0) (<= 0 |#NULL.offset|) (<= |old(~__ste_email_isSignatureVerified1~0)| 0) (<= |outgoing_getClientId_~handle#1| 1) (<= 1 |outgoing_sign_#in~msg#1|) (<= 1 |outgoing_#in~client#1|) (<= 1 |outgoing_outgoing__wrappee__AutoResponder_~msg#1|) (<= 2 |outgoing_outgoing__wrappee__AutoResponder_~tmp~2#1|) (<= |outgoing_~client#1| 1) (<= 0 ~__ste_client_forwardReceiver1~0) (<= 1 |outgoing_mail_~__utac__ad__arg2~0#1|) (= |old(~__ste_email_encryptionKey1~0)| 0) (= ~__ste_client_name0~0.base 0) (<= 0 |old(~__ste_email_isSignatureVerified1~0)|) (<= ~__ste_Client_AddressBook2_Address1~0 0) (= ~__ste_client_outbuffer2~0 0) (<= 1 |outgoing_outgoing__wrappee__Keys_#in~client#1|) (<= ~bob~0 1) (<= 0 |old(~__ste_email_isSigned1~0)|) (<= |old(~__ste_email_signKey1~0)| 0) (<= 0 (+ ~__ste_client_idCounter0~0 2147483648)) (<= ~__ste_client_forwardReceiver2~0 0) (<= 2 ~__ste_email_to0~0) (<= 0 |#StackHeapBarrier|) (<= ~__ste_email_to0~0 2) (<= 1 |outgoing_mail_~client#1|) (= ~__ste_ClientAddressBook_size2~0 0) (= |outgoing___utac_acc__SignForward_spec__1_~tmp~23#1| 0) (= ~__SELECTED_FEATURE_AutoResponder~0 0) (<= ~__ste_client_autoResponse2~0 0) (= ~__ste_email_body1~0.base 0) (<= 1 ~bob~0) (= ~__ste_ClientKeyring_size2~0 0) (<= 0 ~__ste_client_name1~0.base) (<= 0 |old(~__ste_email_signKey1~0)|) (<= 0 ~__ste_email_encryptionKey0~0) (= |#NULL.base| 0) (<= |outgoing_outgoing__wrappee__Keys_#in~msg#1| 1) (<= ~queued_client~0 0))' at error location [2021-11-23 03:52:11,319 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:52:11,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:52:11,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 03:52:11,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269660044] [2021-11-23 03:52:11,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:52:11,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:52:11,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:11,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:52:11,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3489, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 03:52:11,324 INFO L87 Difference]: Start difference. First operand 231 states and 324 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 03:52:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:11,585 INFO L93 Difference]: Finished difference Result 584 states and 876 transitions. [2021-11-23 03:52:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:52:11,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 75 [2021-11-23 03:52:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:11,590 INFO L225 Difference]: With dead ends: 584 [2021-11-23 03:52:11,590 INFO L226 Difference]: Without dead ends: 481 [2021-11-23 03:52:11,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 188.4s TimeCoverageRelationStatistics Valid=171, Invalid=3489, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 03:52:11,594 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 218 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:11,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 821 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:52:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-23 03:52:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 466. [2021-11-23 03:52:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 314 states have (on average 1.5063694267515924) internal successors, (473), 317 states have internal predecessors, (473), 128 states have call successors, (128), 23 states have call predecessors, (128), 23 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-11-23 03:52:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 728 transitions. [2021-11-23 03:52:11,628 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 728 transitions. Word has length 75 [2021-11-23 03:52:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:11,628 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 728 transitions. [2021-11-23 03:52:11,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 03:52:11,629 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 728 transitions. [2021-11-23 03:52:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 03:52:11,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:11,633 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:52:11,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:52:11,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:11,846 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:11,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:11,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1678074044, now seen corresponding path program 1 times [2021-11-23 03:52:11,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:11,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376986204] [2021-11-23 03:52:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:11,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:11,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376986204] [2021-11-23 03:52:11,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376986204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:11,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:11,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:11,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717325873] [2021-11-23 03:52:11,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:11,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:11,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:11,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:11,907 INFO L87 Difference]: Start difference. First operand 466 states and 728 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:12,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:12,006 INFO L93 Difference]: Finished difference Result 1137 states and 1814 transitions. [2021-11-23 03:52:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:12,007 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 81 [2021-11-23 03:52:12,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:12,019 INFO L225 Difference]: With dead ends: 1137 [2021-11-23 03:52:12,020 INFO L226 Difference]: Without dead ends: 703 [2021-11-23 03:52:12,021 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:52:12,022 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 55 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:12,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 444 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-23 03:52:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 698. [2021-11-23 03:52:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 482 states have (on average 1.5269709543568464) internal successors, (736), 485 states have internal predecessors, (736), 192 states have call successors, (192), 23 states have call predecessors, (192), 23 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2021-11-23 03:52:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1119 transitions. [2021-11-23 03:52:12,089 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1119 transitions. Word has length 81 [2021-11-23 03:52:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:12,090 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1119 transitions. [2021-11-23 03:52:12,091 INFO L471 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1119 transitions. [2021-11-23 03:52:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 03:52:12,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:12,096 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:12,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:52:12,097 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:12,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1244315398, now seen corresponding path program 1 times [2021-11-23 03:52:12,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:12,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689629448] [2021-11-23 03:52:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:12,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:12,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:12,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689629448] [2021-11-23 03:52:12,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689629448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:12,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:12,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:12,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027139972] [2021-11-23 03:52:12,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:12,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:12,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:12,176 INFO L87 Difference]: Start difference. First operand 698 states and 1119 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:12,290 INFO L93 Difference]: Finished difference Result 1694 states and 2757 transitions. [2021-11-23 03:52:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:12,291 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2021-11-23 03:52:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:12,300 INFO L225 Difference]: With dead ends: 1694 [2021-11-23 03:52:12,300 INFO L226 Difference]: Without dead ends: 1058 [2021-11-23 03:52:12,303 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:52:12,305 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 53 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:12,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 436 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:12,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-11-23 03:52:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1053. [2021-11-23 03:52:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 742 states have (on average 1.536388140161725) internal successors, (1140), 745 states have internal predecessors, (1140), 287 states have call successors, (287), 23 states have call predecessors, (287), 23 states have return successors, (286), 286 states have call predecessors, (286), 286 states have call successors, (286) [2021-11-23 03:52:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1713 transitions. [2021-11-23 03:52:12,390 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1713 transitions. Word has length 82 [2021-11-23 03:52:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:12,390 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 1713 transitions. [2021-11-23 03:52:12,390 INFO L471 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1713 transitions. [2021-11-23 03:52:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 03:52:12,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:12,402 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:12,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:52:12,403 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1518130998, now seen corresponding path program 1 times [2021-11-23 03:52:12,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:12,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446686886] [2021-11-23 03:52:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:12,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:12,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:12,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446686886] [2021-11-23 03:52:12,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446686886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:12,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:12,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:12,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288474282] [2021-11-23 03:52:12,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:12,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:12,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:12,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:12,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:12,524 INFO L87 Difference]: Start difference. First operand 1053 states and 1713 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:12,661 INFO L93 Difference]: Finished difference Result 2492 states and 4101 transitions. [2021-11-23 03:52:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:12,662 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2021-11-23 03:52:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:12,675 INFO L225 Difference]: With dead ends: 2492 [2021-11-23 03:52:12,675 INFO L226 Difference]: Without dead ends: 1581 [2021-11-23 03:52:12,679 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:52:12,680 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 51 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:12,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 430 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-11-23 03:52:12,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1576. [2021-11-23 03:52:12,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1142 states have (on average 1.542907180385289) internal successors, (1762), 1145 states have internal predecessors, (1762), 410 states have call successors, (410), 23 states have call predecessors, (410), 23 states have return successors, (409), 409 states have call predecessors, (409), 409 states have call successors, (409) [2021-11-23 03:52:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2581 transitions. [2021-11-23 03:52:12,777 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2581 transitions. Word has length 83 [2021-11-23 03:52:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:12,778 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 2581 transitions. [2021-11-23 03:52:12,778 INFO L471 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2581 transitions. [2021-11-23 03:52:12,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 03:52:12,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:12,787 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:12,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:52:12,787 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:12,788 INFO L85 PathProgramCache]: Analyzing trace with hash 798179099, now seen corresponding path program 1 times [2021-11-23 03:52:12,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:12,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424379929] [2021-11-23 03:52:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:12,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:12,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:12,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424379929] [2021-11-23 03:52:12,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424379929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:12,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:12,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:12,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473388420] [2021-11-23 03:52:12,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:12,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:12,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:12,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:12,850 INFO L87 Difference]: Start difference. First operand 1576 states and 2581 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:13,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:13,040 INFO L93 Difference]: Finished difference Result 3702 states and 6129 transitions. [2021-11-23 03:52:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:13,041 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 84 [2021-11-23 03:52:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:13,063 INFO L225 Difference]: With dead ends: 3702 [2021-11-23 03:52:13,063 INFO L226 Difference]: Without dead ends: 2405 [2021-11-23 03:52:13,068 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:52:13,068 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 49 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:13,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 430 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:13,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-11-23 03:52:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2400. [2021-11-23 03:52:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 1787 states have (on average 1.5467263570229435) internal successors, (2764), 1790 states have internal predecessors, (2764), 589 states have call successors, (589), 23 states have call predecessors, (589), 23 states have return successors, (588), 588 states have call predecessors, (588), 588 states have call successors, (588) [2021-11-23 03:52:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3941 transitions. [2021-11-23 03:52:13,237 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3941 transitions. Word has length 84 [2021-11-23 03:52:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:13,237 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 3941 transitions. [2021-11-23 03:52:13,237 INFO L471 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3941 transitions. [2021-11-23 03:52:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:52:13,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:13,248 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:13,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:52:13,249 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:13,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1848662278, now seen corresponding path program 1 times [2021-11-23 03:52:13,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:13,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127856808] [2021-11-23 03:52:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:13,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:13,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:13,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127856808] [2021-11-23 03:52:13,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127856808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:13,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:13,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:13,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276886499] [2021-11-23 03:52:13,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:13,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:13,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:13,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:13,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:13,306 INFO L87 Difference]: Start difference. First operand 2400 states and 3941 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:13,539 INFO L93 Difference]: Finished difference Result 5913 states and 9801 transitions. [2021-11-23 03:52:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:13,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 85 [2021-11-23 03:52:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:13,573 INFO L225 Difference]: With dead ends: 5913 [2021-11-23 03:52:13,573 INFO L226 Difference]: Without dead ends: 3935 [2021-11-23 03:52:13,582 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:52:13,583 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 47 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:13,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 447 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-11-23 03:52:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3930. [2021-11-23 03:52:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3930 states, 2941 states have (on average 1.536552193131588) internal successors, (4519), 2944 states have internal predecessors, (4519), 965 states have call successors, (965), 23 states have call predecessors, (965), 23 states have return successors, (964), 964 states have call predecessors, (964), 964 states have call successors, (964) [2021-11-23 03:52:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 6448 transitions. [2021-11-23 03:52:13,905 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 6448 transitions. Word has length 85 [2021-11-23 03:52:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:13,906 INFO L470 AbstractCegarLoop]: Abstraction has 3930 states and 6448 transitions. [2021-11-23 03:52:13,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:13,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 6448 transitions. [2021-11-23 03:52:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 03:52:13,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:13,921 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:13,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:52:13,922 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:13,922 INFO L85 PathProgramCache]: Analyzing trace with hash 819520223, now seen corresponding path program 1 times [2021-11-23 03:52:13,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:13,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781910610] [2021-11-23 03:52:13,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:13,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:13,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:13,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781910610] [2021-11-23 03:52:13,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781910610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:13,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:13,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:13,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564249639] [2021-11-23 03:52:13,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:13,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:13,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:13,991 INFO L87 Difference]: Start difference. First operand 3930 states and 6448 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:14,306 INFO L93 Difference]: Finished difference Result 9774 states and 16198 transitions. [2021-11-23 03:52:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:14,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2021-11-23 03:52:14,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:14,360 INFO L225 Difference]: With dead ends: 9774 [2021-11-23 03:52:14,360 INFO L226 Difference]: Without dead ends: 6532 [2021-11-23 03:52:14,373 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:52:14,374 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 45 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:14,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 435 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:14,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2021-11-23 03:52:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6527. [2021-11-23 03:52:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 4932 states have (on average 1.532846715328467) internal successors, (7560), 4935 states have internal predecessors, (7560), 1571 states have call successors, (1571), 23 states have call predecessors, (1571), 23 states have return successors, (1570), 1570 states have call predecessors, (1570), 1570 states have call successors, (1570) [2021-11-23 03:52:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 10701 transitions. [2021-11-23 03:52:14,863 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 10701 transitions. Word has length 86 [2021-11-23 03:52:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:14,863 INFO L470 AbstractCegarLoop]: Abstraction has 6527 states and 10701 transitions. [2021-11-23 03:52:14,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 10701 transitions. [2021-11-23 03:52:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 03:52:14,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:14,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:14,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:52:14,884 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:14,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:14,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1685649912, now seen corresponding path program 1 times [2021-11-23 03:52:14,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:14,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427193132] [2021-11-23 03:52:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:14,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:14,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:14,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427193132] [2021-11-23 03:52:14,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427193132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:14,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:14,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:14,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670776274] [2021-11-23 03:52:14,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:14,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:14,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:14,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:14,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:14,939 INFO L87 Difference]: Start difference. First operand 6527 states and 10701 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:15,528 INFO L93 Difference]: Finished difference Result 17026 states and 28116 transitions. [2021-11-23 03:52:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:15,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2021-11-23 03:52:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:15,625 INFO L225 Difference]: With dead ends: 17026 [2021-11-23 03:52:15,625 INFO L226 Difference]: Without dead ends: 11476 [2021-11-23 03:52:15,647 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:52:15,648 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 43 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:15,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 451 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11476 states. [2021-11-23 03:52:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11476 to 11471. [2021-11-23 03:52:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11471 states, 8673 states have (on average 1.5197740112994351) internal successors, (13181), 8676 states have internal predecessors, (13181), 2774 states have call successors, (2774), 23 states have call predecessors, (2774), 23 states have return successors, (2773), 2773 states have call predecessors, (2773), 2773 states have call successors, (2773) [2021-11-23 03:52:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11471 states to 11471 states and 18728 transitions. [2021-11-23 03:52:16,484 INFO L78 Accepts]: Start accepts. Automaton has 11471 states and 18728 transitions. Word has length 87 [2021-11-23 03:52:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:16,484 INFO L470 AbstractCegarLoop]: Abstraction has 11471 states and 18728 transitions. [2021-11-23 03:52:16,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 11471 states and 18728 transitions. [2021-11-23 03:52:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 03:52:16,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:16,514 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:16,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:52:16,514 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:16,515 INFO L85 PathProgramCache]: Analyzing trace with hash -717257568, now seen corresponding path program 1 times [2021-11-23 03:52:16,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:16,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97231122] [2021-11-23 03:52:16,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:16,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:16,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:16,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97231122] [2021-11-23 03:52:16,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97231122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:16,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:16,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:16,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961097500] [2021-11-23 03:52:16,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:16,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:16,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:16,592 INFO L87 Difference]: Start difference. First operand 11471 states and 18728 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:17,608 INFO L93 Difference]: Finished difference Result 30345 states and 49882 transitions. [2021-11-23 03:52:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:17,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 88 [2021-11-23 03:52:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:17,703 INFO L225 Difference]: With dead ends: 30345 [2021-11-23 03:52:17,703 INFO L226 Difference]: Without dead ends: 20303 [2021-11-23 03:52:17,744 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:52:17,745 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 41 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:17,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 435 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20303 states. [2021-11-23 03:52:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20303 to 20298. [2021-11-23 03:52:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20298 states, 15461 states have (on average 1.5121919668844188) internal successors, (23380), 15464 states have internal predecessors, (23380), 4813 states have call successors, (4813), 23 states have call predecessors, (4813), 23 states have return successors, (4812), 4812 states have call predecessors, (4812), 4812 states have call successors, (4812) [2021-11-23 03:52:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20298 states to 20298 states and 33005 transitions. [2021-11-23 03:52:19,192 INFO L78 Accepts]: Start accepts. Automaton has 20298 states and 33005 transitions. Word has length 88 [2021-11-23 03:52:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:19,194 INFO L470 AbstractCegarLoop]: Abstraction has 20298 states and 33005 transitions. [2021-11-23 03:52:19,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 20298 states and 33005 transitions. [2021-11-23 03:52:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 03:52:19,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:19,356 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:19,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:52:19,357 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1879876758, now seen corresponding path program 1 times [2021-11-23 03:52:19,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:19,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492704591] [2021-11-23 03:52:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:19,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:19,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492704591] [2021-11-23 03:52:19,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492704591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:19,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:19,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:19,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706520414] [2021-11-23 03:52:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:19,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:19,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:19,462 INFO L87 Difference]: Start difference. First operand 20298 states and 33005 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:21,493 INFO L93 Difference]: Finished difference Result 55057 states and 89974 transitions. [2021-11-23 03:52:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 89 [2021-11-23 03:52:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:21,672 INFO L225 Difference]: With dead ends: 55057 [2021-11-23 03:52:21,672 INFO L226 Difference]: Without dead ends: 36743 [2021-11-23 03:52:21,729 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:52:21,729 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 39 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:21,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 436 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36743 states. [2021-11-23 03:52:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36743 to 36738. [2021-11-23 03:52:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36738 states, 28186 states have (on average 1.5015965372880153) internal successors, (42324), 28189 states have internal predecessors, (42324), 8528 states have call successors, (8528), 23 states have call predecessors, (8528), 23 states have return successors, (8527), 8527 states have call predecessors, (8527), 8527 states have call successors, (8527) [2021-11-23 03:52:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36738 states to 36738 states and 59379 transitions. [2021-11-23 03:52:24,501 INFO L78 Accepts]: Start accepts. Automaton has 36738 states and 59379 transitions. Word has length 89 [2021-11-23 03:52:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:24,502 INFO L470 AbstractCegarLoop]: Abstraction has 36738 states and 59379 transitions. [2021-11-23 03:52:24,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 36738 states and 59379 transitions. [2021-11-23 03:52:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 03:52:24,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:24,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:24,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:52:24,535 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash -625701824, now seen corresponding path program 1 times [2021-11-23 03:52:24,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:24,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922009974] [2021-11-23 03:52:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:24,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:24,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:24,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922009974] [2021-11-23 03:52:24,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922009974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:24,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:24,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:24,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234072757] [2021-11-23 03:52:24,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:24,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:24,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:24,595 INFO L87 Difference]: Start difference. First operand 36738 states and 59379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:27,034 INFO L93 Difference]: Finished difference Result 67674 states and 109555 transitions. [2021-11-23 03:52:27,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:27,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 90 [2021-11-23 03:52:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:27,332 INFO L225 Difference]: With dead ends: 67674 [2021-11-23 03:52:27,332 INFO L226 Difference]: Without dead ends: 67571 [2021-11-23 03:52:27,354 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:52:27,355 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 37 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:27,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 435 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67571 states. [2021-11-23 03:52:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67571 to 67566. [2021-11-23 03:52:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67566 states, 52215 states have (on average 1.4876951067700852) internal successors, (77680), 52218 states have internal predecessors, (77680), 15327 states have call successors, (15327), 23 states have call predecessors, (15327), 23 states have return successors, (15326), 15326 states have call predecessors, (15326), 15326 states have call successors, (15326) [2021-11-23 03:52:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67566 states to 67566 states and 108333 transitions. [2021-11-23 03:52:30,836 INFO L78 Accepts]: Start accepts. Automaton has 67566 states and 108333 transitions. Word has length 90 [2021-11-23 03:52:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:30,836 INFO L470 AbstractCegarLoop]: Abstraction has 67566 states and 108333 transitions. [2021-11-23 03:52:30,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:52:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 67566 states and 108333 transitions. [2021-11-23 03:52:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 03:52:31,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:31,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:31,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:52:31,219 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1994155305, now seen corresponding path program 1 times [2021-11-23 03:52:31,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:31,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098552134] [2021-11-23 03:52:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:31,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:52:31,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:31,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098552134] [2021-11-23 03:52:31,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098552134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:31,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:31,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-23 03:52:31,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950375506] [2021-11-23 03:52:31,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:31,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:52:31,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:31,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:52:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:52:31,703 INFO L87 Difference]: Start difference. First operand 67566 states and 108333 transitions. Second operand has 20 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 states have internal predecessors, (55), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-23 03:52:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:35,784 INFO L93 Difference]: Finished difference Result 67713 states and 108551 transitions. [2021-11-23 03:52:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:52:35,784 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 states have internal predecessors, (55), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 91 [2021-11-23 03:52:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:36,060 INFO L225 Difference]: With dead ends: 67713 [2021-11-23 03:52:36,060 INFO L226 Difference]: Without dead ends: 67631 [2021-11-23 03:52:36,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:52:36,090 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 470 mSDsluCounter, 3497 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 3285 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:36,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 3285 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 03:52:36,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67631 states. [2021-11-23 03:52:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67631 to 67591. [2021-11-23 03:52:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67591 states, 52229 states have (on average 1.4875643799421778) internal successors, (77694), 52232 states have internal predecessors, (77694), 15335 states have call successors, (15335), 27 states have call predecessors, (15335), 26 states have return successors, (15334), 15334 states have call predecessors, (15334), 15334 states have call successors, (15334) [2021-11-23 03:52:40,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67591 states to 67591 states and 108363 transitions. [2021-11-23 03:52:40,699 INFO L78 Accepts]: Start accepts. Automaton has 67591 states and 108363 transitions. Word has length 91 [2021-11-23 03:52:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:40,699 INFO L470 AbstractCegarLoop]: Abstraction has 67591 states and 108363 transitions. [2021-11-23 03:52:40,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 states have internal predecessors, (55), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-23 03:52:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 67591 states and 108363 transitions. [2021-11-23 03:52:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 03:52:40,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:40,991 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:40,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:52:40,991 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash -74694406, now seen corresponding path program 1 times [2021-11-23 03:52:40,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:40,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082671305] [2021-11-23 03:52:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:40,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 03:52:41,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:41,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082671305] [2021-11-23 03:52:41,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082671305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:41,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:41,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:52:41,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568483727] [2021-11-23 03:52:41,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:41,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:52:41,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:52:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:52:41,130 INFO L87 Difference]: Start difference. First operand 67591 states and 108363 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 4 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-23 03:52:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:44,208 INFO L93 Difference]: Finished difference Result 67647 states and 108413 transitions. [2021-11-23 03:52:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:52:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 4 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 144 [2021-11-23 03:52:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:44,509 INFO L225 Difference]: With dead ends: 67647 [2021-11-23 03:52:44,509 INFO L226 Difference]: Without dead ends: 67605 [2021-11-23 03:52:44,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:52:44,535 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 186 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:44,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 396 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:52:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67605 states. [2021-11-23 03:52:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67605 to 67605. [2021-11-23 03:52:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67605 states, 52236 states have (on average 1.4874798989202849) internal successors, (77700), 52239 states have internal predecessors, (77700), 15335 states have call successors, (15335), 34 states have call predecessors, (15335), 33 states have return successors, (15334), 15334 states have call predecessors, (15334), 15334 states have call successors, (15334) [2021-11-23 03:52:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67605 states to 67605 states and 108369 transitions. [2021-11-23 03:52:48,819 INFO L78 Accepts]: Start accepts. Automaton has 67605 states and 108369 transitions. Word has length 144 [2021-11-23 03:52:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:48,819 INFO L470 AbstractCegarLoop]: Abstraction has 67605 states and 108369 transitions. [2021-11-23 03:52:48,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 4 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-23 03:52:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 67605 states and 108369 transitions. [2021-11-23 03:52:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 03:52:48,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:48,992 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:48,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 03:52:48,993 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1747743845, now seen corresponding path program 1 times [2021-11-23 03:52:48,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:48,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317816831] [2021-11-23 03:52:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:48,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:52:49,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:49,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317816831] [2021-11-23 03:52:49,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317816831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:49,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:49,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-23 03:52:49,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315897324] [2021-11-23 03:52:49,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:49,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:52:49,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:52:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:52:49,358 INFO L87 Difference]: Start difference. First operand 67605 states and 108369 transitions. Second operand has 20 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 12 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-11-23 03:52:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:54,371 INFO L93 Difference]: Finished difference Result 67780 states and 108563 transitions. [2021-11-23 03:52:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 03:52:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 12 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 152 [2021-11-23 03:52:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:54,657 INFO L225 Difference]: With dead ends: 67780 [2021-11-23 03:52:54,657 INFO L226 Difference]: Without dead ends: 67732 [2021-11-23 03:52:54,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1518, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 03:52:54,681 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 456 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:54,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 2024 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 2750 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 03:52:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67732 states. [2021-11-23 03:52:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67732 to 67673. [2021-11-23 03:52:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67673 states, 52276 states have (on average 1.4872216695998164) internal successors, (77746), 52279 states have internal predecessors, (77746), 15351 states have call successors, (15351), 46 states have call predecessors, (15351), 45 states have return successors, (15350), 15349 states have call predecessors, (15350), 15350 states have call successors, (15350) [2021-11-23 03:52:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67673 states to 67673 states and 108447 transitions. [2021-11-23 03:52:58,844 INFO L78 Accepts]: Start accepts. Automaton has 67673 states and 108447 transitions. Word has length 152 [2021-11-23 03:52:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:58,845 INFO L470 AbstractCegarLoop]: Abstraction has 67673 states and 108447 transitions. [2021-11-23 03:52:58,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 12 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-11-23 03:52:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 67673 states and 108447 transitions. [2021-11-23 03:52:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-23 03:52:59,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:59,035 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:59,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 03:52:59,036 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:59,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1755592344, now seen corresponding path program 1 times [2021-11-23 03:52:59,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:59,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560490537] [2021-11-23 03:52:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:59,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 03:52:59,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:59,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560490537] [2021-11-23 03:52:59,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560490537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:52:59,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541963181] [2021-11-23 03:52:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:59,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:59,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:59,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:52:59,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff76eff8-86ae-4296-b305-8fae793ce69e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:52:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:59,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1534 conjuncts, 210 conjunts are in the unsatisfiable core [2021-11-23 03:52:59,810 INFO L286 TraceCheckSpWp]: Computing forward predicates...