./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.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_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/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_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/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_69994fea-1aac-4dcc-86d4-f83c4cffd209/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 e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:15:54,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:15:54,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:15:54,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:15:54,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:15:54,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:15:54,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:15:54,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:15:54,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:15:54,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:15:54,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:15:54,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:15:54,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:15:54,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:15:54,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:15:54,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:15:54,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:15:54,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:15:54,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:15:54,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:15:54,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:15:54,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:15:54,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:15:54,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:15:54,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:15:54,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:15:54,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:15:54,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:15:54,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:15:54,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:15:54,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:15:54,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:15:54,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:15:54,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:15:54,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:15:54,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:15:54,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:15:54,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:15:54,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:15:54,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:15:54,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:15:54,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:15:54,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:15:54,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:15:54,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:15:54,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:15:54,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:15:54,894 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:15:54,894 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:15:54,894 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:15:54,895 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:15:54,895 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:15:54,896 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:15:54,896 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:15:54,897 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:15:54,897 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:15:54,897 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:15:54,898 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:15:54,898 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:15:54,899 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:15:54,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:15:54,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:15:54,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:15:54,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:15:54,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:15:54,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:15:54,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:15:54,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:15:54,902 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:15:54,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:15:54,902 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:15:54,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:15:54,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:15:54,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:15:54,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:15:54,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:15:54,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:15:54,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:15:54,904 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:15:54,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:15:54,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:15:54,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:15:54,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:15:54,905 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_69994fea-1aac-4dcc-86d4-f83c4cffd209/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 [2021-11-20 23:15:55,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:15:55,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:15:55,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:15:55,198 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:15:55,199 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:15:55,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-20 23:15:55,268 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/data/ea073fd98/20210e7d93c542c48288b6b7cde34f71/FLAGecf7d98e3 [2021-11-20 23:15:55,888 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:15:55,889 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-20 23:15:55,923 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/data/ea073fd98/20210e7d93c542c48288b6b7cde34f71/FLAGecf7d98e3 [2021-11-20 23:15:56,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/data/ea073fd98/20210e7d93c542c48288b6b7cde34f71 [2021-11-20 23:15:56,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:15:56,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:15:56,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:15:56,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:15:56,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:15:56,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:56,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5530476b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56, skipping insertion in model container [2021-11-20 23:15:56,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:56,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:15:56,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:15:56,380 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_69994fea-1aac-4dcc-86d4-f83c4cffd209/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-20 23:15:56,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:15:56,739 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:15:56,752 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_69994fea-1aac-4dcc-86d4-f83c4cffd209/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-20 23:15:56,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:15:56,910 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:15:56,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56 WrapperNode [2021-11-20 23:15:56,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:15:56,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:15:56,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:15:56,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:15:56,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:56,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:57,055 INFO L137 Inliner]: procedures = 89, calls = 331, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 801 [2021-11-20 23:15:57,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:15:57,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:15:57,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:15:57,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:15:57,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:57,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:57,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:57,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:57,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:57,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:57,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:57,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:15:57,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:15:57,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:15:57,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:15:57,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (1/1) ... [2021-11-20 23:15:57,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:15:57,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:57,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:15:57,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:15:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-20 23:15:57,328 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-20 23:15:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:15:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 23:15:57,329 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 23:15:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 23:15:57,329 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 23:15:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 23:15:57,330 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 23:15:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 23:15:57,330 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 23:15:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 23:15:57,331 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 23:15:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 23:15:57,331 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 23:15:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 23:15:57,331 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 23:15:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 23:15:57,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 23:15:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 23:15:57,332 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 23:15:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 23:15:57,332 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 23:15:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 23:15:57,333 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 23:15:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 23:15:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 23:15:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 23:15:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 23:15:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 23:15:57,334 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 23:15:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 23:15:57,336 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 23:15:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 23:15:57,337 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 23:15:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:15:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 23:15:57,337 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 23:15:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 23:15:57,338 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 23:15:57,338 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 23:15:57,338 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 23:15:57,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:15:57,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:15:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 23:15:57,339 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 23:15:57,536 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:15:57,538 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:15:58,610 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:15:59,220 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:15:59,220 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:15:59,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:59 BoogieIcfgContainer [2021-11-20 23:15:59,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:15:59,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:15:59,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:15:59,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:15:59,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:15:56" (1/3) ... [2021-11-20 23:15:59,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c0d143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:15:59, skipping insertion in model container [2021-11-20 23:15:59,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:56" (2/3) ... [2021-11-20 23:15:59,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c0d143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:15:59, skipping insertion in model container [2021-11-20 23:15:59,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:59" (3/3) ... [2021-11-20 23:15:59,232 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product09.cil.c [2021-11-20 23:15:59,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:15:59,238 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:15:59,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:15:59,308 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 [2021-11-20 23:15:59,308 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:15:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-20 23:15:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 23:15:59,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:59,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:59,356 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash 249778121, now seen corresponding path program 1 times [2021-11-20 23:15:59,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:59,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065387915] [2021-11-20 23:15:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:59,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:16:00,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065387915] [2021-11-20 23:16:00,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065387915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:00,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:00,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:16:00,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316534912] [2021-11-20 23:16:00,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:00,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:16:00,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:16:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:16:00,090 INFO L87 Difference]: Start difference. First operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-20 23:16:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:02,642 INFO L93 Difference]: Finished difference Result 1159 states and 1908 transitions. [2021-11-20 23:16:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 23:16:02,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2021-11-20 23:16:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:02,683 INFO L225 Difference]: With dead ends: 1159 [2021-11-20 23:16:02,684 INFO L226 Difference]: Without dead ends: 828 [2021-11-20 23:16:02,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:16:02,702 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 1623 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:02,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 2122 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 23:16:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-11-20 23:16:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 779. [2021-11-20 23:16:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 552 states have (on average 1.6431159420289856) internal successors, (907), 587 states have internal predecessors, (907), 184 states have call successors, (184), 40 states have call predecessors, (184), 42 states have return successors, (185), 176 states have call predecessors, (185), 179 states have call successors, (185) [2021-11-20 23:16:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1276 transitions. [2021-11-20 23:16:02,886 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1276 transitions. Word has length 62 [2021-11-20 23:16:02,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:02,887 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 1276 transitions. [2021-11-20 23:16:02,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-20 23:16:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1276 transitions. [2021-11-20 23:16:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 23:16:02,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:02,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:02,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:16:02,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1295504249, now seen corresponding path program 1 times [2021-11-20 23:16:02,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:02,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603649490] [2021-11-20 23:16:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:02,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:16:03,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:03,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603649490] [2021-11-20 23:16:03,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603649490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:03,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:03,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:16:03,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937249677] [2021-11-20 23:16:03,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:03,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:16:03,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:03,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:16:03,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:03,081 INFO L87 Difference]: Start difference. First operand 779 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 23:16:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:03,283 INFO L93 Difference]: Finished difference Result 1309 states and 2151 transitions. [2021-11-20 23:16:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:03,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2021-11-20 23:16:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:03,297 INFO L225 Difference]: With dead ends: 1309 [2021-11-20 23:16:03,297 INFO L226 Difference]: Without dead ends: 849 [2021-11-20 23:16:03,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:03,307 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 41 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:03,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 2179 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-11-20 23:16:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 791. [2021-11-20 23:16:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 561 states have (on average 1.6327985739750446) internal successors, (916), 596 states have internal predecessors, (916), 184 states have call successors, (184), 40 states have call predecessors, (184), 45 states have return successors, (191), 179 states have call predecessors, (191), 179 states have call successors, (191) [2021-11-20 23:16:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1291 transitions. [2021-11-20 23:16:03,431 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1291 transitions. Word has length 67 [2021-11-20 23:16:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:03,433 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 1291 transitions. [2021-11-20 23:16:03,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 23:16:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1291 transitions. [2021-11-20 23:16:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 23:16:03,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:03,441 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:16:03,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:16:03,443 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:03,443 INFO L85 PathProgramCache]: Analyzing trace with hash 153909345, now seen corresponding path program 1 times [2021-11-20 23:16:03,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:03,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595680692] [2021-11-20 23:16:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:03,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:16:03,724 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:03,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595680692] [2021-11-20 23:16:03,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595680692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:03,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:03,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:16:03,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189366759] [2021-11-20 23:16:03,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:03,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:16:03,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:03,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:16:03,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:16:03,728 INFO L87 Difference]: Start difference. First operand 791 states and 1291 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 23:16:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:05,775 INFO L93 Difference]: Finished difference Result 1798 states and 2930 transitions. [2021-11-20 23:16:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:16:05,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2021-11-20 23:16:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:05,787 INFO L225 Difference]: With dead ends: 1798 [2021-11-20 23:16:05,787 INFO L226 Difference]: Without dead ends: 1230 [2021-11-20 23:16:05,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:16:05,792 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 2176 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 926 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:05,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2319 Valid, 1653 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 23:16:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-20 23:16:05,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1136. [2021-11-20 23:16:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5881612090680102) internal successors, (1261), 846 states have internal predecessors, (1261), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2021-11-20 23:16:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1817 transitions. [2021-11-20 23:16:05,876 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1817 transitions. Word has length 71 [2021-11-20 23:16:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:05,877 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1817 transitions. [2021-11-20 23:16:05,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 23:16:05,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1817 transitions. [2021-11-20 23:16:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 23:16:05,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:05,880 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:16:05,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:16:05,881 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:05,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1175148195, now seen corresponding path program 1 times [2021-11-20 23:16:05,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:05,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982289196] [2021-11-20 23:16:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:05,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:16:05,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982289196] [2021-11-20 23:16:05,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982289196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:05,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:05,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:16:05,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307694956] [2021-11-20 23:16:05,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:05,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:16:05,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:05,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:16:05,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:16:05,997 INFO L87 Difference]: Start difference. First operand 1136 states and 1817 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 23:16:06,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:06,227 INFO L93 Difference]: Finished difference Result 2193 states and 3564 transitions. [2021-11-20 23:16:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:16:06,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-11-20 23:16:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:06,238 INFO L225 Difference]: With dead ends: 2193 [2021-11-20 23:16:06,239 INFO L226 Difference]: Without dead ends: 1136 [2021-11-20 23:16:06,245 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 [2021-11-20 23:16:06,246 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 210 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:06,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 1407 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:06,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-20 23:16:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2021-11-20 23:16:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5478589420654911) internal successors, (1229), 846 states have internal predecessors, (1229), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2021-11-20 23:16:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1785 transitions. [2021-11-20 23:16:06,356 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1785 transitions. Word has length 74 [2021-11-20 23:16:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:06,357 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1785 transitions. [2021-11-20 23:16:06,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 23:16:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1785 transitions. [2021-11-20 23:16:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 23:16:06,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:06,361 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:16:06,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:16:06,368 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:06,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1504812747, now seen corresponding path program 1 times [2021-11-20 23:16:06,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:06,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147299135] [2021-11-20 23:16:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:06,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:16:06,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:06,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147299135] [2021-11-20 23:16:06,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147299135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:06,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:06,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:16:06,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495563965] [2021-11-20 23:16:06,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:06,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:16:06,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:16:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:16:06,565 INFO L87 Difference]: Start difference. First operand 1136 states and 1785 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 23:16:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:08,275 INFO L93 Difference]: Finished difference Result 2180 states and 3442 transitions. [2021-11-20 23:16:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:16:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2021-11-20 23:16:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:08,287 INFO L225 Difference]: With dead ends: 2180 [2021-11-20 23:16:08,287 INFO L226 Difference]: Without dead ends: 1324 [2021-11-20 23:16:08,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:16:08,292 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 900 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:08,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 1767 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 23:16:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-11-20 23:16:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1163. [2021-11-20 23:16:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 812 states have (on average 1.54064039408867) internal successors, (1251), 868 states have internal predecessors, (1251), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2021-11-20 23:16:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1819 transitions. [2021-11-20 23:16:08,372 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1819 transitions. Word has length 76 [2021-11-20 23:16:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:08,373 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 1819 transitions. [2021-11-20 23:16:08,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 23:16:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1819 transitions. [2021-11-20 23:16:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 23:16:08,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:08,376 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:16:08,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:16:08,376 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1352152075, now seen corresponding path program 1 times [2021-11-20 23:16:08,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:08,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528217951] [2021-11-20 23:16:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:08,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:16:08,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528217951] [2021-11-20 23:16:08,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528217951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:08,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:08,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:16:08,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723134893] [2021-11-20 23:16:08,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:08,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:16:08,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:16:08,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:08,510 INFO L87 Difference]: Start difference. First operand 1163 states and 1819 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 23:16:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:09,096 INFO L93 Difference]: Finished difference Result 1235 states and 1932 transitions. [2021-11-20 23:16:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2021-11-20 23:16:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:09,106 INFO L225 Difference]: With dead ends: 1235 [2021-11-20 23:16:09,107 INFO L226 Difference]: Without dead ends: 1220 [2021-11-20 23:16:09,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:16:09,109 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 632 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:09,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1680 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:16:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-11-20 23:16:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1167. [2021-11-20 23:16:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5379901960784315) internal successors, (1255), 872 states have internal predecessors, (1255), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2021-11-20 23:16:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1823 transitions. [2021-11-20 23:16:09,197 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1823 transitions. Word has length 80 [2021-11-20 23:16:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:09,197 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1823 transitions. [2021-11-20 23:16:09,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 23:16:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1823 transitions. [2021-11-20 23:16:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 23:16:09,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:09,200 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:16:09,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:16:09,201 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:09,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1690953911, now seen corresponding path program 1 times [2021-11-20 23:16:09,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:09,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479434613] [2021-11-20 23:16:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:09,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:16:09,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:09,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479434613] [2021-11-20 23:16:09,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479434613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:09,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:09,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:16:09,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602365723] [2021-11-20 23:16:09,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:09,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:16:09,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:09,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:16:09,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:16:09,347 INFO L87 Difference]: Start difference. First operand 1167 states and 1823 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 23:16:09,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:09,595 INFO L93 Difference]: Finished difference Result 1186 states and 1847 transitions. [2021-11-20 23:16:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:16:09,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 85 [2021-11-20 23:16:09,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:09,605 INFO L225 Difference]: With dead ends: 1186 [2021-11-20 23:16:09,605 INFO L226 Difference]: Without dead ends: 1171 [2021-11-20 23:16:09,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:16:09,607 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 257 mSDsluCounter, 2358 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:09,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 2714 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:16:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-11-20 23:16:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2021-11-20 23:16:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5343137254901962) internal successors, (1252), 872 states have internal predecessors, (1252), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2021-11-20 23:16:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1820 transitions. [2021-11-20 23:16:09,691 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1820 transitions. Word has length 85 [2021-11-20 23:16:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:09,692 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1820 transitions. [2021-11-20 23:16:09,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 23:16:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1820 transitions. [2021-11-20 23:16:09,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 23:16:09,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:09,695 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:09,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:16:09,696 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:09,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash -259486170, now seen corresponding path program 1 times [2021-11-20 23:16:09,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:09,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990684269] [2021-11-20 23:16:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:09,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:16:09,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990684269] [2021-11-20 23:16:09,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990684269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18706926] [2021-11-20 23:16:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:09,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:09,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:09,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:10,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69994fea-1aac-4dcc-86d4-f83c4cffd209/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:16:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:10,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 23:16:10,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:16:13,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:16:16,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18706926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:16,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570086927] [2021-11-20 23:16:16,090 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2021-11-20 23:16:16,091 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:16,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:16,101 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:16,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:17:09,260 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 578 for LOIs [2021-11-20 23:18:04,642 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2021-11-20 23:20:25,333 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 451 for LOIs [2021-11-20 23:21:10,619 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 30 for LOIs [2021-11-20 23:21:10,716 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2021-11-20 23:22:00,952 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 431 for LOIs [2021-11-20 23:22:02,576 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 461 for LOIs [2021-11-20 23:22:22,722 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 493 for LOIs [2021-11-20 23:22:25,774 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 550 for LOIs [2021-11-20 23:23:01,438 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 802 for LOIs [2021-11-20 23:23:38,111 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 648 for LOIs [2021-11-20 23:23:47,850 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:24:04,592 WARN L227 SmtUtils]: Spent 10.92s on a formula simplification. DAG size of input: 648 DAG size of output: 515 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:24:17,643 WARN L227 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 669 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:24:39,506 WARN L227 SmtUtils]: Spent 16.74s on a formula simplification. DAG size of input: 802 DAG size of output: 617 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:24:48,278 WARN L227 SmtUtils]: Spent 7.26s on a formula simplification that was a NOOP. DAG size: 638 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:25:57,565 WARN L227 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 662 DAG size of output: 622 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:26:40,068 WARN L227 SmtUtils]: Spent 23.16s on a formula simplification. DAG size of input: 701 DAG size of output: 648 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:26:47,815 WARN L227 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 662 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:26:55,208 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 664 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:27:02,953 WARN L227 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 666 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:27:11,201 WARN L227 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 668 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:27:50,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [570086927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:27:51,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:27:51,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [13, 12, 12] total 85 [2021-11-20 23:27:51,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500466827] [2021-11-20 23:27:51,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:27:51,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-20 23:27:51,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:27:51,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-20 23:27:51,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=778, Invalid=6362, Unknown=0, NotChecked=0, Total=7140 [2021-11-20 23:27:51,006 INFO L87 Difference]: Start difference. First operand 1167 states and 1820 transitions. Second operand has 57 states, 46 states have (on average 1.173913043478261) internal successors, (54), 36 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-20 23:28:00,545 WARN L227 SmtUtils]: Spent 8.60s on a formula simplification. DAG size of input: 636 DAG size of output: 590 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)