./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/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_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:03:52,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:03:52,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:03:52,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:03:52,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:03:52,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:03:52,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:03:52,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:03:52,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:03:52,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:03:52,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:03:52,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:03:52,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:03:52,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:03:52,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:03:52,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:03:52,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:03:52,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:03:52,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:03:52,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:03:52,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:03:52,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:03:52,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:03:52,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:03:52,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:03:52,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:03:52,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:03:52,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:03:52,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:03:52,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:03:52,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:03:52,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:03:52,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:03:52,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:03:52,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:03:52,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:03:52,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:03:52,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:03:52,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:03:52,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:03:52,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:03:52,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:03:52,612 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:03:52,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:03:52,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:03:52,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:03:52,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:03:52,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:03:52,615 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:03:52,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:03:52,615 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:03:52,616 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:03:52,617 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:03:52,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:03:52,617 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:03:52,617 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:03:52,618 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:03:52,618 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:03:52,618 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:03:52,618 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:03:52,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:03:52,619 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:03:52,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:03:52,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:03:52,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:03:52,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:03:52,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:03:52,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:03:52,622 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:03:52,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:03:52,623 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:03:52,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:03:52,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:03:52,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:03:52,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:03:52,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:03:52,625 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:03:52,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:03:52,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:03:52,626 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:03:52,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:03:52,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:03:52,626 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:03:52,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80e9bbe10488e38c848fee2c8f87fc84d027f309ec95e867f80c828929ca07a3 [2022-11-19 08:03:52,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:03:52,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:03:52,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:03:52,961 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:03:52,962 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:03:52,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c [2022-11-19 08:03:53,021 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/data/0675564a5/3840cffd1ddd482ba35a27be2d6c64dc/FLAG673d1fb42 [2022-11-19 08:03:53,682 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:03:53,683 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c [2022-11-19 08:03:53,706 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/data/0675564a5/3840cffd1ddd482ba35a27be2d6c64dc/FLAG673d1fb42 [2022-11-19 08:03:53,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/data/0675564a5/3840cffd1ddd482ba35a27be2d6c64dc [2022-11-19 08:03:53,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:03:53,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:03:53,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:03:53,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:03:53,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:03:53,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:53" (1/1) ... [2022-11-19 08:03:53,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8a2454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:53, skipping insertion in model container [2022-11-19 08:03:53,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:53" (1/1) ... [2022-11-19 08:03:53,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:03:53,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:03:54,679 WARN L234 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_35ac51f3-5fd2-49c5-b967-89f14021bded/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c[64112,64125] [2022-11-19 08:03:54,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:03:54,696 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:03:54,849 WARN L234 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_35ac51f3-5fd2-49c5-b967-89f14021bded/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c[64112,64125] [2022-11-19 08:03:54,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:03:54,888 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:03:54,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54 WrapperNode [2022-11-19 08:03:54,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:03:54,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:03:54,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:03:54,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:03:54,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:54,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:55,000 INFO L138 Inliner]: procedures = 131, calls = 218, calls flagged for inlining = 60, calls inlined = 50, statements flattened = 909 [2022-11-19 08:03:55,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:03:55,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:03:55,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:03:55,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:03:55,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:55,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:55,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:55,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:55,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:55,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:55,040 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:55,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:55,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:03:55,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:03:55,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:03:55,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:03:55,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2022-11-19 08:03:55,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:03:55,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:55,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:03:55,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:03:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-19 08:03:55,195 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-19 08:03:55,196 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-19 08:03:55,196 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-19 08:03:55,196 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-19 08:03:55,197 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-19 08:03:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-19 08:03:55,197 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-19 08:03:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-19 08:03:55,197 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-19 08:03:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-19 08:03:55,198 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-19 08:03:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-19 08:03:55,198 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-19 08:03:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-19 08:03:55,199 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-19 08:03:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-19 08:03:55,200 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-19 08:03:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-19 08:03:55,200 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-19 08:03:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-19 08:03:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-19 08:03:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-19 08:03:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-19 08:03:55,202 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-19 08:03:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:03:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-19 08:03:55,203 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-19 08:03:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-19 08:03:55,203 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-19 08:03:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-19 08:03:55,206 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-19 08:03:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-19 08:03:55,207 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-19 08:03:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-19 08:03:55,207 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-19 08:03:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-19 08:03:55,208 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-19 08:03:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-19 08:03:55,208 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-19 08:03:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-19 08:03:55,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-19 08:03:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-19 08:03:55,209 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-19 08:03:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-19 08:03:55,210 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-19 08:03:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:03:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-19 08:03:55,212 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-19 08:03:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:03:55,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:03:55,502 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:03:55,505 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:03:56,443 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:03:56,891 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:03:56,892 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:03:56,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:56 BoogieIcfgContainer [2022-11-19 08:03:56,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:03:56,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:03:56,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:03:56,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:03:56,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:53" (1/3) ... [2022-11-19 08:03:56,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22cf1355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:56, skipping insertion in model container [2022-11-19 08:03:56,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (2/3) ... [2022-11-19 08:03:56,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22cf1355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:56, skipping insertion in model container [2022-11-19 08:03:56,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:56" (3/3) ... [2022-11-19 08:03:56,904 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec4_product30.cil.c [2022-11-19 08:03:56,924 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:03:56,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:03:56,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:03:56,989 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3cf1119b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:03:56,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:03:56,994 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) [2022-11-19 08:03:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-19 08:03:57,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:57,007 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:57,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:57,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1921470385, now seen corresponding path program 1 times [2022-11-19 08:03:57,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:57,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160633929] [2022-11-19 08:03:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:57,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:03:57,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:57,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160633929] [2022-11-19 08:03:57,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160633929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:57,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:57,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:03:57,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101796234] [2022-11-19 08:03:57,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:57,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:03:57,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:57,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:03:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:03:57,486 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) [2022-11-19 08:03:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:57,629 INFO L93 Difference]: Finished difference Result 295 states and 386 transitions. [2022-11-19 08:03:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:03:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 68 [2022-11-19 08:03:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:57,643 INFO L225 Difference]: With dead ends: 295 [2022-11-19 08:03:57,643 INFO L226 Difference]: Without dead ends: 186 [2022-11-19 08:03:57,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:03:57,651 INFO L413 NwaCegarLoop]: 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 [2022-11-19 08:03:57,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 217 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:57,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-19 08:03:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-11-19 08:03:57,720 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) [2022-11-19 08:03:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 247 transitions. [2022-11-19 08:03:57,733 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 247 transitions. Word has length 68 [2022-11-19 08:03:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:57,736 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 247 transitions. [2022-11-19 08:03:57,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:03:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 247 transitions. [2022-11-19 08:03:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:03:57,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:57,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:57,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:03:57,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:57,753 INFO L85 PathProgramCache]: Analyzing trace with hash 694161, now seen corresponding path program 1 times [2022-11-19 08:03:57,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:57,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375372012] [2022-11-19 08:03:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:57,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:03:58,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:58,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375372012] [2022-11-19 08:03:58,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375372012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:58,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:58,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:03:58,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702004777] [2022-11-19 08:03:58,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:58,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:58,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:58,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:58,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:58,118 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) [2022-11-19 08:03:58,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:58,305 INFO L93 Difference]: Finished difference Result 291 states and 374 transitions. [2022-11-19 08:03:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:58,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 69 [2022-11-19 08:03:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:58,311 INFO L225 Difference]: With dead ends: 291 [2022-11-19 08:03:58,311 INFO L226 Difference]: Without dead ends: 188 [2022-11-19 08:03:58,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:58,314 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 0 mSDsluCounter, 213 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 [2022-11-19 08:03:58,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 427 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-19 08:03:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-11-19 08:03:58,343 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) [2022-11-19 08:03:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 249 transitions. [2022-11-19 08:03:58,345 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 249 transitions. Word has length 69 [2022-11-19 08:03:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:58,346 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 249 transitions. [2022-11-19 08:03:58,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:03:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 249 transitions. [2022-11-19 08:03:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 08:03:58,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:58,348 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:58,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:03:58,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash 80934024, now seen corresponding path program 1 times [2022-11-19 08:03:58,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:58,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321555740] [2022-11-19 08:03:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:58,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:03:58,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321555740] [2022-11-19 08:03:58,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321555740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:58,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:58,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:03:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33673865] [2022-11-19 08:03:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:58,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:58,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:58,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:58,488 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) [2022-11-19 08:03:58,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:58,631 INFO L93 Difference]: Finished difference Result 406 states and 557 transitions. [2022-11-19 08:03:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 74 [2022-11-19 08:03:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:58,637 INFO L225 Difference]: With dead ends: 406 [2022-11-19 08:03:58,637 INFO L226 Difference]: Without dead ends: 236 [2022-11-19 08:03:58,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:58,647 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 57 mSDsluCounter, 207 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 [2022-11-19 08:03:58,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 439 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-19 08:03:58,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 231. [2022-11-19 08:03:58,690 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) [2022-11-19 08:03:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 324 transitions. [2022-11-19 08:03:58,692 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 324 transitions. Word has length 74 [2022-11-19 08:03:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:58,693 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 324 transitions. [2022-11-19 08:03:58,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:03:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 324 transitions. [2022-11-19 08:03:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 08:03:58,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:58,695 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:58,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:03:58,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:58,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2121245715, now seen corresponding path program 1 times [2022-11-19 08:03:58,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:58,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545375245] [2022-11-19 08:03:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:58,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:03:58,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:58,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545375245] [2022-11-19 08:03:58,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545375245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:58,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178920110] [2022-11-19 08:03:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:58,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:58,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:58,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:58,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:03:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:59,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:03:59,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:03:59,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:03:59,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178920110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:59,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2007800567] [2022-11-19 08:03:59,500 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-19 08:03:59,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:59,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:59,510 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:59,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:38,492 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 439 for LOIs [2022-11-19 08:04:38,848 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-19 08:04:39,201 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 267 for LOIs [2022-11-19 08:04:41,570 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 237 for LOIs [2022-11-19 08:04:41,632 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 269 for LOIs [2022-11-19 08:05:07,480 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 450 for LOIs [2022-11-19 08:05:08,149 INFO L197 IcfgInterpreter]: Interpreting procedure findPublicKey with input of size 249 for LOIs [2022-11-19 08:05:08,223 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 254 for LOIs [2022-11-19 08:05:08,267 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 473 for LOIs [2022-11-19 08:05:11,758 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 251 for LOIs [2022-11-19 08:05:11,805 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:20,115 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 611 DAG size of output: 438 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:05:57,060 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 486 DAG size of output: 290 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:06:11,762 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 508 DAG size of output: 385 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:06:32,251 WARN L233 SmtUtils]: Spent 20.14s on a formula simplification. DAG size of input: 590 DAG size of output: 462 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:06:44,369 WARN L233 SmtUtils]: Spent 11.75s on a formula simplification. DAG size of input: 592 DAG size of output: 345 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:06:51,079 WARN L233 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 565 DAG size of output: 356 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:06:57,762 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 561 DAG size of output: 352 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:07:08,614 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 473 DAG size of output: 279 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:07:39,261 WARN L233 SmtUtils]: Spent 11.34s on a formula simplification. DAG size of input: 450 DAG size of output: 344 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:07:51,304 WARN L233 SmtUtils]: Spent 11.46s on a formula simplification. DAG size of input: 476 DAG size of output: 353 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:08:36,742 WARN L233 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 604 DAG size of output: 421 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:08:52,554 WARN L233 SmtUtils]: Spent 9.85s on a formula simplification. DAG size of input: 611 DAG size of output: 415 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:09:00,484 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 614 DAG size of output: 419 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:09:00,491 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 [2022-11-19 08:09:00,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:09:00,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:09:00,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 08:09:00,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479883890] [2022-11-19 08:09:00,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:09:00,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:09:00,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:00,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:09:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3491, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 08:09:00,497 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) [2022-11-19 08:09:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:00,772 INFO L93 Difference]: Finished difference Result 584 states and 876 transitions. [2022-11-19 08:09:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:09:00,773 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 [2022-11-19 08:09:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:00,779 INFO L225 Difference]: With dead ends: 584 [2022-11-19 08:09:00,779 INFO L226 Difference]: Without dead ends: 481 [2022-11-19 08:09:00,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 228.6s TimeCoverageRelationStatistics Valid=169, Invalid=3491, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 08:09:00,785 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 218 mSDsluCounter, 548 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 [2022-11-19 08:09:00,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 821 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:09:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-19 08:09:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 466. [2022-11-19 08:09:00,829 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) [2022-11-19 08:09:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 728 transitions. [2022-11-19 08:09:00,832 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 728 transitions. Word has length 75 [2022-11-19 08:09:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:00,833 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 728 transitions. [2022-11-19 08:09:00,833 INFO L496 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) [2022-11-19 08:09:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 728 transitions. [2022-11-19 08:09:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 08:09:00,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:00,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:00,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:09:01,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35ac51f3-5fd2-49c5-b967-89f14021bded/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:01,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:01,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1678074044, now seen corresponding path program 1 times [2022-11-19 08:09:01,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:01,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350605137] [2022-11-19 08:09:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:01,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:01,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:01,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350605137] [2022-11-19 08:09:01,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350605137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:01,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:01,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:09:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048467729] [2022-11-19 08:09:01,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:01,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:01,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:01,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:01,139 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) [2022-11-19 08:09:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:01,262 INFO L93 Difference]: Finished difference Result 1137 states and 1814 transitions. [2022-11-19 08:09:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:01,263 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 [2022-11-19 08:09:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:01,270 INFO L225 Difference]: With dead ends: 1137 [2022-11-19 08:09:01,270 INFO L226 Difference]: Without dead ends: 703 [2022-11-19 08:09:01,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:01,273 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 55 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-19 08:09:01,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 444 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-11-19 08:09:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 698. [2022-11-19 08:09:01,332 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) [2022-11-19 08:09:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1119 transitions. [2022-11-19 08:09:01,338 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1119 transitions. Word has length 81 [2022-11-19 08:09:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:01,340 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 1119 transitions. [2022-11-19 08:09:01,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:09:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1119 transitions. [2022-11-19 08:09:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 08:09:01,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:01,350 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:09:01,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1244315398, now seen corresponding path program 1 times [2022-11-19 08:09:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:01,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330958405] [2022-11-19 08:09:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:01,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:01,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:01,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330958405] [2022-11-19 08:09:01,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330958405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:01,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:01,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:09:01,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917410171] [2022-11-19 08:09:01,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:01,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:01,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:01,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:01,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:01,476 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) [2022-11-19 08:09:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:01,634 INFO L93 Difference]: Finished difference Result 1694 states and 2757 transitions. [2022-11-19 08:09:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:01,639 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 [2022-11-19 08:09:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:01,646 INFO L225 Difference]: With dead ends: 1694 [2022-11-19 08:09:01,646 INFO L226 Difference]: Without dead ends: 1058 [2022-11-19 08:09:01,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:01,649 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 53 mSDsluCounter, 208 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 [2022-11-19 08:09:01,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 436 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-11-19 08:09:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1053. [2022-11-19 08:09:01,723 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) [2022-11-19 08:09:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1713 transitions. [2022-11-19 08:09:01,728 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1713 transitions. Word has length 82 [2022-11-19 08:09:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:01,729 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 1713 transitions. [2022-11-19 08:09:01,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:09:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1713 transitions. [2022-11-19 08:09:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-19 08:09:01,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:01,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:01,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:09:01,737 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:01,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1518130998, now seen corresponding path program 1 times [2022-11-19 08:09:01,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:01,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340465379] [2022-11-19 08:09:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:01,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:01,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:01,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340465379] [2022-11-19 08:09:01,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340465379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:01,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:01,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:09:01,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757164250] [2022-11-19 08:09:01,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:01,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:01,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:01,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:01,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:01,868 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) [2022-11-19 08:09:02,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:02,027 INFO L93 Difference]: Finished difference Result 2492 states and 4101 transitions. [2022-11-19 08:09:02,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:02,028 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 [2022-11-19 08:09:02,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:02,037 INFO L225 Difference]: With dead ends: 2492 [2022-11-19 08:09:02,037 INFO L226 Difference]: Without dead ends: 1581 [2022-11-19 08:09:02,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:02,041 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 51 mSDsluCounter, 205 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 [2022-11-19 08:09:02,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 430 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:02,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2022-11-19 08:09:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1576. [2022-11-19 08:09:02,136 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) [2022-11-19 08:09:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2581 transitions. [2022-11-19 08:09:02,144 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2581 transitions. Word has length 83 [2022-11-19 08:09:02,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:02,145 INFO L495 AbstractCegarLoop]: Abstraction has 1576 states and 2581 transitions. [2022-11-19 08:09:02,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:09:02,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2581 transitions. [2022-11-19 08:09:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-19 08:09:02,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:02,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:02,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:09:02,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:02,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:02,153 INFO L85 PathProgramCache]: Analyzing trace with hash 798179099, now seen corresponding path program 1 times [2022-11-19 08:09:02,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:02,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939459599] [2022-11-19 08:09:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:02,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:02,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:02,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939459599] [2022-11-19 08:09:02,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939459599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:02,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:02,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:09:02,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67230188] [2022-11-19 08:09:02,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:02,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:02,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:02,266 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) [2022-11-19 08:09:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:02,484 INFO L93 Difference]: Finished difference Result 3702 states and 6129 transitions. [2022-11-19 08:09:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:02,485 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 [2022-11-19 08:09:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:02,499 INFO L225 Difference]: With dead ends: 3702 [2022-11-19 08:09:02,499 INFO L226 Difference]: Without dead ends: 2405 [2022-11-19 08:09:02,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:02,504 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 49 mSDsluCounter, 205 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 [2022-11-19 08:09:02,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 430 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2022-11-19 08:09:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2400. [2022-11-19 08:09:02,662 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) [2022-11-19 08:09:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3941 transitions. [2022-11-19 08:09:02,678 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3941 transitions. Word has length 84 [2022-11-19 08:09:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:02,680 INFO L495 AbstractCegarLoop]: Abstraction has 2400 states and 3941 transitions. [2022-11-19 08:09:02,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:09:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3941 transitions. [2022-11-19 08:09:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-19 08:09:02,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:02,690 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:02,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:09:02,690 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1848662278, now seen corresponding path program 1 times [2022-11-19 08:09:02,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:02,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788231613] [2022-11-19 08:09:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:02,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:02,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:02,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788231613] [2022-11-19 08:09:02,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788231613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:02,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:02,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:09:02,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420345392] [2022-11-19 08:09:02,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:02,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:02,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:02,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:02,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:02,798 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) [2022-11-19 08:09:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:03,138 INFO L93 Difference]: Finished difference Result 5913 states and 9801 transitions. [2022-11-19 08:09:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:03,138 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 [2022-11-19 08:09:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:03,161 INFO L225 Difference]: With dead ends: 5913 [2022-11-19 08:09:03,161 INFO L226 Difference]: Without dead ends: 3935 [2022-11-19 08:09:03,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:03,170 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 47 mSDsluCounter, 212 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 [2022-11-19 08:09:03,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 447 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2022-11-19 08:09:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3930. [2022-11-19 08:09:03,455 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) [2022-11-19 08:09:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 6448 transitions. [2022-11-19 08:09:03,482 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 6448 transitions. Word has length 85 [2022-11-19 08:09:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:03,483 INFO L495 AbstractCegarLoop]: Abstraction has 3930 states and 6448 transitions. [2022-11-19 08:09:03,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:09:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 6448 transitions. [2022-11-19 08:09:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 08:09:03,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:03,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:03,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:09:03,496 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:03,496 INFO L85 PathProgramCache]: Analyzing trace with hash 819520223, now seen corresponding path program 1 times [2022-11-19 08:09:03,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:03,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759470324] [2022-11-19 08:09:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:03,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:03,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:03,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759470324] [2022-11-19 08:09:03,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759470324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:03,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:03,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:09:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667392320] [2022-11-19 08:09:03,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:03,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:03,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:03,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:03,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:03,607 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) [2022-11-19 08:09:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:04,060 INFO L93 Difference]: Finished difference Result 9774 states and 16198 transitions. [2022-11-19 08:09:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:04,061 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 [2022-11-19 08:09:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:04,098 INFO L225 Difference]: With dead ends: 9774 [2022-11-19 08:09:04,098 INFO L226 Difference]: Without dead ends: 6532 [2022-11-19 08:09:04,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:04,112 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 45 mSDsluCounter, 208 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 [2022-11-19 08:09:04,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 435 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2022-11-19 08:09:04,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6527. [2022-11-19 08:09:04,702 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) [2022-11-19 08:09:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 10701 transitions. [2022-11-19 08:09:04,728 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 10701 transitions. Word has length 86 [2022-11-19 08:09:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:04,729 INFO L495 AbstractCegarLoop]: Abstraction has 6527 states and 10701 transitions. [2022-11-19 08:09:04,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:09:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 10701 transitions. [2022-11-19 08:09:04,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 08:09:04,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:04,746 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:04,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:09:04,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:04,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1685649912, now seen corresponding path program 1 times [2022-11-19 08:09:04,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:04,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968541609] [2022-11-19 08:09:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:04,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:04,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:04,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968541609] [2022-11-19 08:09:04,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968541609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:04,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:04,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:09:04,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986630573] [2022-11-19 08:09:04,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:04,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:04,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:04,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:04,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:04,829 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) [2022-11-19 08:09:05,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:05,693 INFO L93 Difference]: Finished difference Result 17026 states and 28116 transitions. [2022-11-19 08:09:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:05,703 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 [2022-11-19 08:09:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:05,788 INFO L225 Difference]: With dead ends: 17026 [2022-11-19 08:09:05,788 INFO L226 Difference]: Without dead ends: 11476 [2022-11-19 08:09:05,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:05,806 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 43 mSDsluCounter, 212 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 [2022-11-19 08:09:05,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 451 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11476 states. [2022-11-19 08:09:06,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11476 to 11471. [2022-11-19 08:09:06,676 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) [2022-11-19 08:09:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11471 states to 11471 states and 18728 transitions. [2022-11-19 08:09:06,727 INFO L78 Accepts]: Start accepts. Automaton has 11471 states and 18728 transitions. Word has length 87 [2022-11-19 08:09:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:06,727 INFO L495 AbstractCegarLoop]: Abstraction has 11471 states and 18728 transitions. [2022-11-19 08:09:06,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:09:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 11471 states and 18728 transitions. [2022-11-19 08:09:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 08:09:06,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:06,750 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:06,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:09:06,750 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:06,751 INFO L85 PathProgramCache]: Analyzing trace with hash -717257568, now seen corresponding path program 1 times [2022-11-19 08:09:06,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:06,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648858676] [2022-11-19 08:09:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:06,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:06,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:06,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648858676] [2022-11-19 08:09:06,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648858676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:06,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:06,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:09:06,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489272177] [2022-11-19 08:09:06,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:06,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:06,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:06,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:06,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:06,941 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) [2022-11-19 08:09:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:08,679 INFO L93 Difference]: Finished difference Result 30345 states and 49882 transitions. [2022-11-19 08:09:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:08,679 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 [2022-11-19 08:09:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:08,763 INFO L225 Difference]: With dead ends: 30345 [2022-11-19 08:09:08,763 INFO L226 Difference]: Without dead ends: 20303 [2022-11-19 08:09:08,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:08,790 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 41 mSDsluCounter, 208 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 [2022-11-19 08:09:08,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 435 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20303 states. [2022-11-19 08:09:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20303 to 20298. [2022-11-19 08:09:10,526 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) [2022-11-19 08:09:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20298 states to 20298 states and 33005 transitions. [2022-11-19 08:09:10,594 INFO L78 Accepts]: Start accepts. Automaton has 20298 states and 33005 transitions. Word has length 88 [2022-11-19 08:09:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:10,595 INFO L495 AbstractCegarLoop]: Abstraction has 20298 states and 33005 transitions. [2022-11-19 08:09:10,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:09:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 20298 states and 33005 transitions. [2022-11-19 08:09:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-19 08:09:10,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:10,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:10,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:09:10,622 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1879876758, now seen corresponding path program 1 times [2022-11-19 08:09:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:10,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621464396] [2022-11-19 08:09:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:10,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:10,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:10,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621464396] [2022-11-19 08:09:10,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621464396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:10,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:10,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:09:10,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246953664] [2022-11-19 08:09:10,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:10,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:10,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:10,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:10,720 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) [2022-11-19 08:09:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:13,206 INFO L93 Difference]: Finished difference Result 55057 states and 89974 transitions. [2022-11-19 08:09:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:13,206 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 [2022-11-19 08:09:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:13,393 INFO L225 Difference]: With dead ends: 55057 [2022-11-19 08:09:13,393 INFO L226 Difference]: Without dead ends: 36743 [2022-11-19 08:09:13,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:13,461 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 39 mSDsluCounter, 208 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 [2022-11-19 08:09:13,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 436 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36743 states. [2022-11-19 08:09:16,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36743 to 36738. [2022-11-19 08:09:16,784 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) [2022-11-19 08:09:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36738 states to 36738 states and 59379 transitions. [2022-11-19 08:09:16,906 INFO L78 Accepts]: Start accepts. Automaton has 36738 states and 59379 transitions. Word has length 89 [2022-11-19 08:09:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:16,907 INFO L495 AbstractCegarLoop]: Abstraction has 36738 states and 59379 transitions. [2022-11-19 08:09:16,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:09:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 36738 states and 59379 transitions. [2022-11-19 08:09:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-19 08:09:16,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:16,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:16,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:09:16,934 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash -625701824, now seen corresponding path program 1 times [2022-11-19 08:09:16,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:16,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935114694] [2022-11-19 08:09:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:16,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:17,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:17,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935114694] [2022-11-19 08:09:17,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935114694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:17,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:17,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:09:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561529751] [2022-11-19 08:09:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:17,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:17,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:17,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:17,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:17,022 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) [2022-11-19 08:09:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:20,925 INFO L93 Difference]: Finished difference Result 67674 states and 109555 transitions. [2022-11-19 08:09:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:20,925 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 [2022-11-19 08:09:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:21,190 INFO L225 Difference]: With dead ends: 67674 [2022-11-19 08:09:21,190 INFO L226 Difference]: Without dead ends: 67571 [2022-11-19 08:09:21,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:09:21,212 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 37 mSDsluCounter, 208 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 [2022-11-19 08:09:21,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 435 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:09:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67571 states. [2022-11-19 08:09:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67571 to 67566. [2022-11-19 08:09:25,318 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) [2022-11-19 08:09:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67566 states to 67566 states and 108333 transitions. [2022-11-19 08:09:25,989 INFO L78 Accepts]: Start accepts. Automaton has 67566 states and 108333 transitions. Word has length 90 [2022-11-19 08:09:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:25,989 INFO L495 AbstractCegarLoop]: Abstraction has 67566 states and 108333 transitions. [2022-11-19 08:09:25,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:09:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 67566 states and 108333 transitions. [2022-11-19 08:09:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 08:09:26,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:26,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:26,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:09:26,025 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1994155305, now seen corresponding path program 1 times [2022-11-19 08:09:26,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:26,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080870986] [2022-11-19 08:09:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:26,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:09:27,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:27,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080870986] [2022-11-19 08:09:27,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080870986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:27,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:27,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-19 08:09:27,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798404959] [2022-11-19 08:09:27,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:27,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:09:27,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:27,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:09:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:09:27,736 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) [2022-11-19 08:09:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:33,431 INFO L93 Difference]: Finished difference Result 67713 states and 108551 transitions. [2022-11-19 08:09:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:09:33,432 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 [2022-11-19 08:09:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:33,690 INFO L225 Difference]: With dead ends: 67713 [2022-11-19 08:09:33,690 INFO L226 Difference]: Without dead ends: 67631 [2022-11-19 08:09:33,712 INFO L412 NwaCegarLoop]: 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 [2022-11-19 08:09:33,712 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 477 mSDsluCounter, 2985 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 3242 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:33,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 3242 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:09:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67631 states.