./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P --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 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:32:50,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:32:50,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:32:50,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:32:50,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:32:50,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:32:50,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:32:50,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:32:50,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:32:50,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:32:50,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:32:50,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:32:50,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:32:50,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:32:50,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:32:50,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:32:50,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:32:50,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:32:50,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:32:50,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:32:50,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:32:50,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:32:50,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:32:50,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:32:50,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:32:50,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:32:50,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:32:50,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:32:50,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:32:50,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:32:50,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:32:50,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:32:50,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:32:50,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:32:50,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:32:50,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:32:50,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:32:50,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:32:50,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:32:50,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:32:50,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:32:50,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:32:50,760 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:32:50,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:32:50,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:32:50,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:32:50,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:32:50,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:32:50,763 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:32:50,763 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:32:50,764 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:32:50,764 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:32:50,764 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:32:50,765 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:32:50,765 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:32:50,765 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:32:50,766 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:32:50,766 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:32:50,766 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:32:50,767 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:32:50,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:32:50,768 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:32:50,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:32:50,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:32:50,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:32:50,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:32:50,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:32:50,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:32:50,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:32:50,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:32:50,771 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:32:50,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:32:50,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:32:50,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:32:50,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:32:50,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:32:50,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:32:50,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:32:50,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:32:50,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:32:50,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:32:50,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:32:50,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:32:50,774 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2021-11-21 01:32:51,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:32:51,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:32:51,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:32:51,033 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:32:51,033 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:32:51,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-21 01:32:51,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/data/e2c92f194/c176fd955e7e4589bbe4c88fd07e370f/FLAG5f7686db4 [2021-11-21 01:32:51,813 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:32:51,814 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-21 01:32:51,844 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/data/e2c92f194/c176fd955e7e4589bbe4c88fd07e370f/FLAG5f7686db4 [2021-11-21 01:32:51,951 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/data/e2c92f194/c176fd955e7e4589bbe4c88fd07e370f [2021-11-21 01:32:51,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:32:51,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:32:51,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:32:51,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:32:51,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:32:51,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:32:51" (1/1) ... [2021-11-21 01:32:51,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de58641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:51, skipping insertion in model container [2021-11-21 01:32:51,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:32:51" (1/1) ... [2021-11-21 01:32:51,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:32:52,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:32:52,554 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-21 01:32:52,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:32:52,673 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:32:52,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-21 01:32:52,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:32:52,811 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:32:52,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52 WrapperNode [2021-11-21 01:32:52,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:32:52,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:32:52,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:32:52,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:32:52,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (1/1) ... [2021-11-21 01:32:52,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (1/1) ... [2021-11-21 01:32:52,909 INFO L137 Inliner]: procedures = 99, calls = 355, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 981 [2021-11-21 01:32:52,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:32:52,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:32:52,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:32:52,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:32:52,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (1/1) ... [2021-11-21 01:32:52,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (1/1) ... [2021-11-21 01:32:52,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (1/1) ... [2021-11-21 01:32:52,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (1/1) ... [2021-11-21 01:32:52,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (1/1) ... [2021-11-21 01:32:52,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (1/1) ... [2021-11-21 01:32:52,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (1/1) ... [2021-11-21 01:32:52,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:32:53,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:32:53,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:32:53,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:32:53,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (1/1) ... [2021-11-21 01:32:53,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:32:53,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:53,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:32:53,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:32:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-21 01:32:53,075 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-21 01:32:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-21 01:32:53,076 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-21 01:32:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-21 01:32:53,076 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-21 01:32:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-21 01:32:53,076 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-21 01:32:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 01:32:53,077 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 01:32:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-21 01:32:53,077 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-21 01:32:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-21 01:32:53,077 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-21 01:32:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-21 01:32:53,077 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-21 01:32:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-21 01:32:53,078 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-21 01:32:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-21 01:32:53,078 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-21 01:32:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-21 01:32:53,078 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-21 01:32:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:32:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-21 01:32:53,079 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-21 01:32:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-21 01:32:53,079 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-21 01:32:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-21 01:32:53,079 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-21 01:32:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-21 01:32:53,079 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-21 01:32:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 01:32:53,080 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 01:32:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-21 01:32:53,080 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-21 01:32:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-21 01:32:53,080 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-21 01:32:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-21 01:32:53,080 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-21 01:32:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-21 01:32:53,081 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-21 01:32:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-21 01:32:53,081 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-21 01:32:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-21 01:32:53,081 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-21 01:32:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-21 01:32:53,081 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-21 01:32:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-21 01:32:53,082 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-21 01:32:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:32:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-21 01:32:53,082 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-21 01:32:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:32:53,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:32:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-21 01:32:53,083 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-21 01:32:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-21 01:32:53,083 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-21 01:32:53,225 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:32:53,227 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:32:54,442 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:32:55,137 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:32:55,138 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:32:55,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:32:55 BoogieIcfgContainer [2021-11-21 01:32:55,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:32:55,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:32:55,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:32:55,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:32:55,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:32:51" (1/3) ... [2021-11-21 01:32:55,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c8f7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:32:55, skipping insertion in model container [2021-11-21 01:32:55,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:52" (2/3) ... [2021-11-21 01:32:55,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c8f7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:32:55, skipping insertion in model container [2021-11-21 01:32:55,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:32:55" (3/3) ... [2021-11-21 01:32:55,156 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2021-11-21 01:32:55,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:32:55,162 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:32:55,230 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:32:55,240 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:32:55,240 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:32:55,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-21 01:32:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 01:32:55,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:55,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:55,296 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:55,301 INFO L85 PathProgramCache]: Analyzing trace with hash 188925223, now seen corresponding path program 1 times [2021-11-21 01:32:55,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:55,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190473717] [2021-11-21 01:32:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:55,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:55,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:55,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190473717] [2021-11-21 01:32:55,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190473717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:55,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:55,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:32:55,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485287834] [2021-11-21 01:32:55,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:55,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:32:55,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:55,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:32:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:32:55,716 INFO L87 Difference]: Start difference. First operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-21 01:32:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:55,945 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2021-11-21 01:32:55,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:32:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2021-11-21 01:32:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:55,988 INFO L225 Difference]: With dead ends: 424 [2021-11-21 01:32:55,989 INFO L226 Difference]: Without dead ends: 402 [2021-11-21 01:32:55,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:32:56,001 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:56,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 593 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:32:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-21 01:32:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2021-11-21 01:32:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 270 states have (on average 1.5629629629629629) internal successors, (422), 291 states have internal predecessors, (422), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-21 01:32:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2021-11-21 01:32:56,132 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2021-11-21 01:32:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:56,134 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2021-11-21 01:32:56,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-21 01:32:56,134 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2021-11-21 01:32:56,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:32:56,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:56,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:56,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:32:56,139 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:56,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1788741007, now seen corresponding path program 1 times [2021-11-21 01:32:56,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:56,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339210428] [2021-11-21 01:32:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:56,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:56,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:56,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339210428] [2021-11-21 01:32:56,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339210428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:56,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:56,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:32:56,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56279796] [2021-11-21 01:32:56,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:56,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:32:56,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:56,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:32:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:32:56,461 INFO L87 Difference]: Start difference. First operand 402 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 01:32:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:58,729 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2021-11-21 01:32:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:32:58,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2021-11-21 01:32:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:58,739 INFO L225 Difference]: With dead ends: 1312 [2021-11-21 01:32:58,739 INFO L226 Difference]: Without dead ends: 926 [2021-11-21 01:32:58,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:32:58,747 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 1266 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:58,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 1414 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:32:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-11-21 01:32:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2021-11-21 01:32:58,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 586 states have (on average 1.5853242320819112) internal successors, (929), 616 states have internal predecessors, (929), 204 states have call successors, (204), 47 states have call predecessors, (204), 48 states have return successors, (206), 188 states have call predecessors, (206), 199 states have call successors, (206) [2021-11-21 01:32:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2021-11-21 01:32:58,841 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2021-11-21 01:32:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:58,842 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2021-11-21 01:32:58,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 01:32:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2021-11-21 01:32:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-21 01:32:58,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:58,852 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:58,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:32:58,852 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2139264353, now seen corresponding path program 1 times [2021-11-21 01:32:58,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:58,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698297720] [2021-11-21 01:32:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:58,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:32:59,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:59,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698297720] [2021-11-21 01:32:59,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698297720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:59,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:59,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:32:59,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816426030] [2021-11-21 01:32:59,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:59,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:32:59,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:32:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:32:59,078 INFO L87 Difference]: Start difference. First operand 839 states and 1339 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:33:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:01,243 INFO L93 Difference]: Finished difference Result 2617 states and 4223 transitions. [2021-11-21 01:33:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:33:01,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2021-11-21 01:33:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:01,262 INFO L225 Difference]: With dead ends: 2617 [2021-11-21 01:33:01,262 INFO L226 Difference]: Without dead ends: 1795 [2021-11-21 01:33:01,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:33:01,278 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 1198 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2416 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:01,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1281 Valid, 1969 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 2416 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:33:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-11-21 01:33:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1708. [2021-11-21 01:33:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1203 states have (on average 1.5901911886949294) internal successors, (1913), 1259 states have internal predecessors, (1913), 406 states have call successors, (406), 91 states have call predecessors, (406), 98 states have return successors, (433), 381 states have call predecessors, (433), 401 states have call successors, (433) [2021-11-21 01:33:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2752 transitions. [2021-11-21 01:33:01,445 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2752 transitions. Word has length 88 [2021-11-21 01:33:01,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:01,447 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 2752 transitions. [2021-11-21 01:33:01,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:33:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2752 transitions. [2021-11-21 01:33:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-21 01:33:01,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:01,455 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:01,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:33:01,456 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:01,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1333133073, now seen corresponding path program 1 times [2021-11-21 01:33:01,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:01,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040327716] [2021-11-21 01:33:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:01,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:33:01,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:01,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040327716] [2021-11-21 01:33:01,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040327716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:01,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:01,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:33:01,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008591781] [2021-11-21 01:33:01,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:01,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:33:01,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:33:01,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:33:01,670 INFO L87 Difference]: Start difference. First operand 1708 states and 2752 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-21 01:33:04,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:04,881 INFO L93 Difference]: Finished difference Result 4684 states and 7540 transitions. [2021-11-21 01:33:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:33:04,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2021-11-21 01:33:04,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:04,907 INFO L225 Difference]: With dead ends: 4684 [2021-11-21 01:33:04,907 INFO L226 Difference]: Without dead ends: 2992 [2021-11-21 01:33:04,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:33:04,926 INFO L933 BasicCegarLoop]: 985 mSDtfsCounter, 1408 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 4301 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 2633 SdHoareTripleChecker+Invalid, 5059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 4301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:04,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 2633 Invalid, 5059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 4301 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-21 01:33:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-11-21 01:33:05,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2797. [2021-11-21 01:33:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 1921 states have (on average 1.5627277459656428) internal successors, (3002), 2020 states have internal predecessors, (3002), 711 states have call successors, (711), 144 states have call predecessors, (711), 164 states have return successors, (758), 676 states have call predecessors, (758), 706 states have call successors, (758) [2021-11-21 01:33:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 4471 transitions. [2021-11-21 01:33:05,140 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 4471 transitions. Word has length 91 [2021-11-21 01:33:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:05,141 INFO L470 AbstractCegarLoop]: Abstraction has 2797 states and 4471 transitions. [2021-11-21 01:33:05,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-21 01:33:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 4471 transitions. [2021-11-21 01:33:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 01:33:05,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:05,144 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:05,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:33:05,145 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash -139030049, now seen corresponding path program 1 times [2021-11-21 01:33:05,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:05,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79486947] [2021-11-21 01:33:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:05,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:33:05,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:05,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79486947] [2021-11-21 01:33:05,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79486947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:05,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:05,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:33:05,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109744204] [2021-11-21 01:33:05,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:05,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:05,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:05,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:05,369 INFO L87 Difference]: Start difference. First operand 2797 states and 4471 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:33:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:06,758 INFO L93 Difference]: Finished difference Result 7504 states and 12117 transitions. [2021-11-21 01:33:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:06,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2021-11-21 01:33:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:06,797 INFO L225 Difference]: With dead ends: 7504 [2021-11-21 01:33:06,797 INFO L226 Difference]: Without dead ends: 4723 [2021-11-21 01:33:06,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:33:06,818 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 1214 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:06,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1292 Valid, 989 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:33:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2021-11-21 01:33:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4382. [2021-11-21 01:33:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 3018 states have (on average 1.5576540755467196) internal successors, (4701), 3181 states have internal predecessors, (4701), 1102 states have call successors, (1102), 216 states have call predecessors, (1102), 261 states have return successors, (1215), 1044 states have call predecessors, (1215), 1097 states have call successors, (1215) [2021-11-21 01:33:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 7018 transitions. [2021-11-21 01:33:07,132 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 7018 transitions. Word has length 92 [2021-11-21 01:33:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:07,134 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 7018 transitions. [2021-11-21 01:33:07,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:33:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 7018 transitions. [2021-11-21 01:33:07,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 01:33:07,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:07,137 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:07,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:33:07,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:07,139 INFO L85 PathProgramCache]: Analyzing trace with hash -15256274, now seen corresponding path program 1 times [2021-11-21 01:33:07,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:07,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029073069] [2021-11-21 01:33:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:07,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:33:07,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:07,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029073069] [2021-11-21 01:33:07,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029073069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:07,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:07,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:33:07,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940849959] [2021-11-21 01:33:07,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:07,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:07,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:07,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:07,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:07,340 INFO L87 Difference]: Start difference. First operand 4382 states and 7018 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:33:08,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:08,948 INFO L93 Difference]: Finished difference Result 12119 states and 19668 transitions. [2021-11-21 01:33:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:08,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2021-11-21 01:33:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:09,015 INFO L225 Difference]: With dead ends: 12119 [2021-11-21 01:33:09,016 INFO L226 Difference]: Without dead ends: 7754 [2021-11-21 01:33:09,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:33:09,051 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 1201 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:09,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 998 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:33:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7754 states. [2021-11-21 01:33:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7754 to 7359. [2021-11-21 01:33:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7359 states, 5083 states have (on average 1.5559708833366122) internal successors, (7909), 5386 states have internal predecessors, (7909), 1822 states have call successors, (1822), 360 states have call predecessors, (1822), 453 states have return successors, (2105), 1712 states have call predecessors, (2105), 1817 states have call successors, (2105) [2021-11-21 01:33:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7359 states to 7359 states and 11836 transitions. [2021-11-21 01:33:09,611 INFO L78 Accepts]: Start accepts. Automaton has 7359 states and 11836 transitions. Word has length 93 [2021-11-21 01:33:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:09,612 INFO L470 AbstractCegarLoop]: Abstraction has 7359 states and 11836 transitions. [2021-11-21 01:33:09,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:33:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7359 states and 11836 transitions. [2021-11-21 01:33:09,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-21 01:33:09,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:09,621 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:09,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:33:09,621 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:09,622 INFO L85 PathProgramCache]: Analyzing trace with hash -473232639, now seen corresponding path program 1 times [2021-11-21 01:33:09,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:09,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127744367] [2021-11-21 01:33:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:09,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:33:09,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127744367] [2021-11-21 01:33:09,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127744367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:09,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:09,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:33:09,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826666633] [2021-11-21 01:33:09,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:09,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:09,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:09,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:09,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:09,774 INFO L87 Difference]: Start difference. First operand 7359 states and 11836 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:33:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:11,614 INFO L93 Difference]: Finished difference Result 21120 states and 34681 transitions. [2021-11-21 01:33:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:11,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2021-11-21 01:33:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:11,738 INFO L225 Difference]: With dead ends: 21120 [2021-11-21 01:33:11,739 INFO L226 Difference]: Without dead ends: 13780 [2021-11-21 01:33:11,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:33:11,799 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 1188 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:11,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 1007 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:33:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13780 states. [2021-11-21 01:33:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13780 to 13248. [2021-11-21 01:33:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13248 states, 9158 states have (on average 1.5521948023585936) internal successors, (14215), 9753 states have internal predecessors, (14215), 3240 states have call successors, (3240), 648 states have call predecessors, (3240), 849 states have return successors, (4043), 3026 states have call predecessors, (4043), 3235 states have call successors, (4043) [2021-11-21 01:33:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13248 states to 13248 states and 21498 transitions. [2021-11-21 01:33:12,848 INFO L78 Accepts]: Start accepts. Automaton has 13248 states and 21498 transitions. Word has length 94 [2021-11-21 01:33:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:12,849 INFO L470 AbstractCegarLoop]: Abstraction has 13248 states and 21498 transitions. [2021-11-21 01:33:12,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:33:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 13248 states and 21498 transitions. [2021-11-21 01:33:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-21 01:33:12,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:12,853 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:12,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:33:12,853 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:12,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:12,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1785594160, now seen corresponding path program 1 times [2021-11-21 01:33:12,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:12,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728127827] [2021-11-21 01:33:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:33:12,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728127827] [2021-11-21 01:33:12,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728127827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:12,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:12,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:33:12,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549280181] [2021-11-21 01:33:12,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:12,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:12,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:12,981 INFO L87 Difference]: Start difference. First operand 13248 states and 21498 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:33:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:15,167 INFO L93 Difference]: Finished difference Result 38937 states and 65412 transitions. [2021-11-21 01:33:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2021-11-21 01:33:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:15,359 INFO L225 Difference]: With dead ends: 38937 [2021-11-21 01:33:15,359 INFO L226 Difference]: Without dead ends: 25712 [2021-11-21 01:33:15,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:33:15,434 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 1175 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:15,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 1019 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:33:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25712 states. [2021-11-21 01:33:17,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25712 to 24877. [2021-11-21 01:33:17,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24877 states, 17185 states have (on average 1.546755891766075) internal successors, (26581), 18388 states have internal predecessors, (26581), 6026 states have call successors, (6026), 1224 states have call predecessors, (6026), 1665 states have return successors, (8481), 5604 states have call predecessors, (8481), 6021 states have call successors, (8481) [2021-11-21 01:33:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24877 states to 24877 states and 41088 transitions. [2021-11-21 01:33:17,431 INFO L78 Accepts]: Start accepts. Automaton has 24877 states and 41088 transitions. Word has length 95 [2021-11-21 01:33:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:17,432 INFO L470 AbstractCegarLoop]: Abstraction has 24877 states and 41088 transitions. [2021-11-21 01:33:17,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:33:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 24877 states and 41088 transitions. [2021-11-21 01:33:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-21 01:33:17,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:17,438 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:17,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:33:17,438 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:17,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:17,439 INFO L85 PathProgramCache]: Analyzing trace with hash 480875555, now seen corresponding path program 1 times [2021-11-21 01:33:17,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:17,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995737712] [2021-11-21 01:33:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:17,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:33:17,750 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:17,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995737712] [2021-11-21 01:33:17,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995737712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:17,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:17,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:33:17,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157672551] [2021-11-21 01:33:17,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:17,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:17,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:17,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:17,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:17,753 INFO L87 Difference]: Start difference. First operand 24877 states and 41088 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:33:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:21,465 INFO L93 Difference]: Finished difference Result 74343 states and 130208 transitions. [2021-11-21 01:33:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:21,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2021-11-21 01:33:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:21,765 INFO L225 Difference]: With dead ends: 74343 [2021-11-21 01:33:21,766 INFO L226 Difference]: Without dead ends: 49487 [2021-11-21 01:33:21,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:33:21,867 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 1184 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:21,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1258 Valid, 1013 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:33:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49487 states. [2021-11-21 01:33:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49487 to 47626. [2021-11-21 01:33:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47626 states, 32892 states have (on average 1.543506019700839) internal successors, (50769), 35263 states have internal predecessors, (50769), 11489 states have call successors, (11489), 2372 states have call predecessors, (11489), 3244 states have return successors, (18642), 10650 states have call predecessors, (18642), 11484 states have call successors, (18642) [2021-11-21 01:33:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47626 states to 47626 states and 80900 transitions. [2021-11-21 01:33:25,693 INFO L78 Accepts]: Start accepts. Automaton has 47626 states and 80900 transitions. Word has length 96 [2021-11-21 01:33:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:25,694 INFO L470 AbstractCegarLoop]: Abstraction has 47626 states and 80900 transitions. [2021-11-21 01:33:25,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:33:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 47626 states and 80900 transitions. [2021-11-21 01:33:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-21 01:33:25,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:25,704 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:25,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:33:25,705 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1711049652, now seen corresponding path program 1 times [2021-11-21 01:33:25,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:25,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298152626] [2021-11-21 01:33:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:25,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-21 01:33:25,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:25,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298152626] [2021-11-21 01:33:25,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298152626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:25,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:25,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:33:25,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423851401] [2021-11-21 01:33:25,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:25,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:25,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:25,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:25,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:25,832 INFO L87 Difference]: Start difference. First operand 47626 states and 80900 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 01:33:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:28,730 INFO L93 Difference]: Finished difference Result 96918 states and 169438 transitions. [2021-11-21 01:33:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:28,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 144 [2021-11-21 01:33:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:29,014 INFO L225 Difference]: With dead ends: 96918 [2021-11-21 01:33:29,014 INFO L226 Difference]: Without dead ends: 49309 [2021-11-21 01:33:29,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:33:29,258 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 30 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:29,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1759 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49309 states. [2021-11-21 01:33:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49309 to 47824. [2021-11-21 01:33:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47824 states, 33090 states have (on average 1.5402538531278331) internal successors, (50967), 35461 states have internal predecessors, (50967), 11489 states have call successors, (11489), 2372 states have call predecessors, (11489), 3244 states have return successors, (18642), 10650 states have call predecessors, (18642), 11484 states have call successors, (18642) [2021-11-21 01:33:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47824 states to 47824 states and 81098 transitions. [2021-11-21 01:33:32,043 INFO L78 Accepts]: Start accepts. Automaton has 47824 states and 81098 transitions. Word has length 144 [2021-11-21 01:33:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:32,045 INFO L470 AbstractCegarLoop]: Abstraction has 47824 states and 81098 transitions. [2021-11-21 01:33:32,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 01:33:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 47824 states and 81098 transitions. [2021-11-21 01:33:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 01:33:32,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:32,059 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:32,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:33:32,060 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:32,060 INFO L85 PathProgramCache]: Analyzing trace with hash 919613305, now seen corresponding path program 1 times [2021-11-21 01:33:32,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:32,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772347349] [2021-11-21 01:33:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:32,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-21 01:33:32,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:32,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772347349] [2021-11-21 01:33:32,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772347349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:32,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031189103] [2021-11-21 01:33:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:32,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:32,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:32,629 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:32,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:33:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:33:33,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:33:33,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:33:33,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031189103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:33,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:33:33,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-11-21 01:33:33,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632516027] [2021-11-21 01:33:33,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:33,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:33,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:33,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:33,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:33:33,514 INFO L87 Difference]: Start difference. First operand 47824 states and 81098 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:33:36,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:36,317 INFO L93 Difference]: Finished difference Result 98205 states and 173002 transitions. [2021-11-21 01:33:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:36,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 151 [2021-11-21 01:33:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:36,594 INFO L225 Difference]: With dead ends: 98205 [2021-11-21 01:33:36,594 INFO L226 Difference]: Without dead ends: 50398 [2021-11-21 01:33:36,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:33:36,832 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 213 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:36,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1548 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:33:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50398 states. [2021-11-21 01:33:39,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50398 to 50398. [2021-11-21 01:33:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50398 states, 35598 states have (on average 1.5670824203606943) internal successors, (55785), 37969 states have internal predecessors, (55785), 11489 states have call successors, (11489), 2438 states have call predecessors, (11489), 3310 states have return successors, (18642), 10650 states have call predecessors, (18642), 11484 states have call successors, (18642) [2021-11-21 01:33:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50398 states to 50398 states and 85916 transitions. [2021-11-21 01:33:39,874 INFO L78 Accepts]: Start accepts. Automaton has 50398 states and 85916 transitions. Word has length 151 [2021-11-21 01:33:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:39,875 INFO L470 AbstractCegarLoop]: Abstraction has 50398 states and 85916 transitions. [2021-11-21 01:33:39,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:33:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 50398 states and 85916 transitions. [2021-11-21 01:33:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-21 01:33:39,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:39,887 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:39,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:33:40,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:40,101 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:40,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:40,102 INFO L85 PathProgramCache]: Analyzing trace with hash 945874961, now seen corresponding path program 1 times [2021-11-21 01:33:40,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:40,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564273795] [2021-11-21 01:33:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:40,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-21 01:33:40,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564273795] [2021-11-21 01:33:40,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564273795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299187280] [2021-11-21 01:33:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:40,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:40,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:40,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:40,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:33:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:40,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 2085 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:33:40,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 01:33:41,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:33:41,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299187280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:41,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:33:41,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2021-11-21 01:33:41,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467612421] [2021-11-21 01:33:41,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:41,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:41,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:41,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:41,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:33:41,201 INFO L87 Difference]: Start difference. First operand 50398 states and 85916 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:33:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:44,201 INFO L93 Difference]: Finished difference Result 103353 states and 182374 transitions. [2021-11-21 01:33:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 156 [2021-11-21 01:33:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:44,467 INFO L225 Difference]: With dead ends: 103353 [2021-11-21 01:33:44,468 INFO L226 Difference]: Without dead ends: 52972 [2021-11-21 01:33:44,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:33:44,691 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 211 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:44,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1548 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:33:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52972 states. [2021-11-21 01:33:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52972 to 52972. [2021-11-21 01:33:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52972 states, 38106 states have (on average 1.5903794678003464) internal successors, (60603), 40477 states have internal predecessors, (60603), 11489 states have call successors, (11489), 2504 states have call predecessors, (11489), 3376 states have return successors, (18642), 10650 states have call predecessors, (18642), 11484 states have call successors, (18642) [2021-11-21 01:33:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52972 states to 52972 states and 90734 transitions. [2021-11-21 01:33:47,717 INFO L78 Accepts]: Start accepts. Automaton has 52972 states and 90734 transitions. Word has length 156 [2021-11-21 01:33:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:47,718 INFO L470 AbstractCegarLoop]: Abstraction has 52972 states and 90734 transitions. [2021-11-21 01:33:47,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:33:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 52972 states and 90734 transitions. [2021-11-21 01:33:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-21 01:33:47,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:47,734 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:47,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:47,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:33:47,949 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:47,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:47,949 INFO L85 PathProgramCache]: Analyzing trace with hash -330908223, now seen corresponding path program 1 times [2021-11-21 01:33:47,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:47,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990076829] [2021-11-21 01:33:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:47,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:33:48,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990076829] [2021-11-21 01:33:48,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990076829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:48,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438092840] [2021-11-21 01:33:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:48,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:48,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:48,422 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:48,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69afb41e-f36a-46c2-b2e5-92b1488be73a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:33:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:48,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2089 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:33:48,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:33:49,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:33:49,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438092840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:49,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:33:49,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2021-11-21 01:33:49,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416574780] [2021-11-21 01:33:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:49,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:49,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:33:49,106 INFO L87 Difference]: Start difference. First operand 52972 states and 90734 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:33:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:51,860 INFO L93 Difference]: Finished difference Result 108501 states and 191746 transitions. [2021-11-21 01:33:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 160 [2021-11-21 01:33:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:52,182 INFO L225 Difference]: With dead ends: 108501 [2021-11-21 01:33:52,183 INFO L226 Difference]: Without dead ends: 55546 [2021-11-21 01:33:52,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:33:52,422 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 209 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:52,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1548 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:33:52,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55546 states.