./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.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_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/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_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/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_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/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 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:46:20,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:46:20,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:46:20,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:46:20,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:46:20,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:46:20,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:46:21,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:46:21,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:46:21,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:46:21,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:46:21,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:46:21,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:46:21,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:46:21,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:46:21,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:46:21,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:46:21,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:46:21,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:46:21,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:46:21,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:46:21,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:46:21,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:46:21,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:46:21,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:46:21,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:46:21,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:46:21,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:46:21,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:46:21,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:46:21,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:46:21,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:46:21,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:46:21,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:46:21,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:46:21,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:46:21,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:46:21,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:46:21,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:46:21,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:46:21,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:46:21,063 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:46:21,107 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:46:21,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:46:21,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:46:21,108 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:46:21,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:46:21,115 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:46:21,116 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:46:21,116 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:46:21,116 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:46:21,116 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:46:21,118 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:46:21,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:46:21,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:46:21,118 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:46:21,119 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:46:21,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:46:21,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:46:21,119 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:46:21,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:46:21,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:46:21,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:46:21,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:46:21,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:46:21,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:46:21,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:46:21,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:46:21,124 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:46:21,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:46:21,124 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:46:21,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:46:21,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:46:21,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:46:21,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:46:21,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:46:21,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:46:21,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:46:21,127 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:46:21,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:46:21,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:46:21,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:46:21,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:46:21,128 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_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2021-11-21 01:46:21,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:46:21,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:46:21,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:46:21,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:46:21,430 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:46:21,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-21 01:46:21,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/data/848ba3323/ea7495b7b403400b8a5f9e36deafb227/FLAG55cb6e1ca [2021-11-21 01:46:22,115 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:46:22,116 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-21 01:46:22,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/data/848ba3323/ea7495b7b403400b8a5f9e36deafb227/FLAG55cb6e1ca [2021-11-21 01:46:22,364 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/data/848ba3323/ea7495b7b403400b8a5f9e36deafb227 [2021-11-21 01:46:22,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:46:22,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:46:22,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:46:22,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:46:22,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:46:22,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:46:22" (1/1) ... [2021-11-21 01:46:22,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22415149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:22, skipping insertion in model container [2021-11-21 01:46:22,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:46:22" (1/1) ... [2021-11-21 01:46:22,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:46:22,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:46:22,890 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_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-21 01:46:23,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:46:23,105 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:46:23,202 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_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-21 01:46:23,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:46:23,311 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:46:23,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23 WrapperNode [2021-11-21 01:46:23,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:46:23,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:46:23,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:46:23,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:46:23,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (1/1) ... [2021-11-21 01:46:23,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (1/1) ... [2021-11-21 01:46:23,454 INFO L137 Inliner]: procedures = 97, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1178 [2021-11-21 01:46:23,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:46:23,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:46:23,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:46:23,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:46:23,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (1/1) ... [2021-11-21 01:46:23,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (1/1) ... [2021-11-21 01:46:23,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (1/1) ... [2021-11-21 01:46:23,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (1/1) ... [2021-11-21 01:46:23,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (1/1) ... [2021-11-21 01:46:23,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (1/1) ... [2021-11-21 01:46:23,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (1/1) ... [2021-11-21 01:46:23,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:46:23,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:46:23,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:46:23,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:46:23,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (1/1) ... [2021-11-21 01:46:23,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:46:23,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:23,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:46:23,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:46:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-21 01:46:23,668 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-21 01:46:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-21 01:46:23,669 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-21 01:46:23,669 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-21 01:46:23,669 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-21 01:46:23,669 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 01:46:23,669 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 01:46:23,670 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-21 01:46:23,670 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-21 01:46:23,670 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-21 01:46:23,670 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-21 01:46:23,670 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-21 01:46:23,670 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-21 01:46:23,671 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-21 01:46:23,671 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-21 01:46:23,671 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-21 01:46:23,671 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-21 01:46:23,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:46:23,671 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-21 01:46:23,672 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-21 01:46:23,672 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-21 01:46:23,672 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-21 01:46:23,672 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-21 01:46:23,672 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-21 01:46:23,672 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 01:46:23,673 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 01:46:23,673 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-21 01:46:23,673 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-21 01:46:23,673 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-21 01:46:23,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-21 01:46:23,674 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-21 01:46:23,674 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-21 01:46:23,674 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-21 01:46:23,674 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-21 01:46:23,675 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-21 01:46:23,675 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-21 01:46:23,675 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-21 01:46:23,675 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-21 01:46:23,675 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-21 01:46:23,675 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-21 01:46:23,676 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-21 01:46:23,676 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-21 01:46:23,676 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-21 01:46:23,677 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-21 01:46:23,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:46:23,677 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-21 01:46:23,678 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-21 01:46:23,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:46:23,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:46:23,679 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-21 01:46:23,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-21 01:46:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-21 01:46:23,680 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-21 01:46:23,891 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:46:23,905 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:46:25,028 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:46:25,602 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:46:25,602 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:46:25,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:46:25 BoogieIcfgContainer [2021-11-21 01:46:25,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:46:25,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:46:25,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:46:25,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:46:25,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:46:22" (1/3) ... [2021-11-21 01:46:25,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b924fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:46:25, skipping insertion in model container [2021-11-21 01:46:25,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:23" (2/3) ... [2021-11-21 01:46:25,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b924fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:46:25, skipping insertion in model container [2021-11-21 01:46:25,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:46:25" (3/3) ... [2021-11-21 01:46:25,614 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product28.cil.c [2021-11-21 01:46:25,620 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:46:25,620 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:46:25,687 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:46:25,695 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:46:25,696 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:46:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-21 01:46:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 01:46:25,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:25,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:25,761 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:25,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1587334211, now seen corresponding path program 1 times [2021-11-21 01:46:25,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:25,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960395904] [2021-11-21 01:46:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:25,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:26,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960395904] [2021-11-21 01:46:26,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960395904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:26,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:26,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:46:26,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436661943] [2021-11-21 01:46:26,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:26,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:46:26,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:46:26,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:46:26,322 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-21 01:46:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:26,470 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2021-11-21 01:46:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:46:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2021-11-21 01:46:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:26,494 INFO L225 Difference]: With dead ends: 401 [2021-11-21 01:46:26,494 INFO L226 Difference]: Without dead ends: 379 [2021-11-21 01:46:26,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:46:26,502 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:26,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:46:26,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-21 01:46:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2021-11-21 01:46:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 255 states have (on average 1.580392156862745) internal successors, (403), 276 states have internal predecessors, (403), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-21 01:46:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2021-11-21 01:46:26,667 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2021-11-21 01:46:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:26,669 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2021-11-21 01:46:26,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-21 01:46:26,669 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2021-11-21 01:46:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:46:26,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:26,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:26,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:46:26,674 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1461820053, now seen corresponding path program 1 times [2021-11-21 01:46:26,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:26,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536418948] [2021-11-21 01:46:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:26,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:26,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:26,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536418948] [2021-11-21 01:46:26,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536418948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:26,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:26,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:46:26,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54078575] [2021-11-21 01:46:26,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:26,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:46:26,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:26,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:46:26,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:46:26,955 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 01:46:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:29,133 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2021-11-21 01:46:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:46:29,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2021-11-21 01:46:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:29,147 INFO L225 Difference]: With dead ends: 1243 [2021-11-21 01:46:29,147 INFO L226 Difference]: Without dead ends: 880 [2021-11-21 01:46:29,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:46:29,154 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 1209 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:29,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 1394 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:46:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-21 01:46:29,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2021-11-21 01:46:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 556 states have (on average 1.6025179856115108) internal successors, (891), 586 states have internal predecessors, (891), 192 states have call successors, (192), 43 states have call predecessors, (192), 44 states have return successors, (194), 176 states have call predecessors, (194), 187 states have call successors, (194) [2021-11-21 01:46:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2021-11-21 01:46:29,306 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2021-11-21 01:46:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:29,307 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2021-11-21 01:46:29,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 01:46:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2021-11-21 01:46:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 01:46:29,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:29,322 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:29,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:46:29,323 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1378588201, now seen corresponding path program 1 times [2021-11-21 01:46:29,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:29,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466098352] [2021-11-21 01:46:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:29,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:46:29,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:29,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466098352] [2021-11-21 01:46:29,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466098352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:29,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:29,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:46:29,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104451349] [2021-11-21 01:46:29,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:29,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:46:29,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:29,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:46:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:46:29,547 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:46:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:32,549 INFO L93 Difference]: Finished difference Result 2747 states and 4462 transitions. [2021-11-21 01:46:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:46:32,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2021-11-21 01:46:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:32,572 INFO L225 Difference]: With dead ends: 2747 [2021-11-21 01:46:32,572 INFO L226 Difference]: Without dead ends: 1970 [2021-11-21 01:46:32,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:46:32,589 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 1340 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 4008 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 4727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 4008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:32,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1416 Valid, 2587 Invalid, 4727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 4008 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-21 01:46:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-11-21 01:46:32,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1783. [2021-11-21 01:46:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1211 states have (on average 1.5730800990916598) internal successors, (1905), 1283 states have internal predecessors, (1905), 479 states have call successors, (479), 80 states have call predecessors, (479), 92 states have return successors, (498), 452 states have call predecessors, (498), 474 states have call successors, (498) [2021-11-21 01:46:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2882 transitions. [2021-11-21 01:46:32,790 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2882 transitions. Word has length 87 [2021-11-21 01:46:32,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:32,793 INFO L470 AbstractCegarLoop]: Abstraction has 1783 states and 2882 transitions. [2021-11-21 01:46:32,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:46:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2882 transitions. [2021-11-21 01:46:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-21 01:46:32,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:32,799 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:32,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:46:32,799 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1652019250, now seen corresponding path program 1 times [2021-11-21 01:46:32,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:32,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395328161] [2021-11-21 01:46:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:32,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:46:33,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:33,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395328161] [2021-11-21 01:46:33,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395328161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:33,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:33,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:46:33,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996284109] [2021-11-21 01:46:33,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:33,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:46:33,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:33,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:46:33,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:46:33,014 INFO L87 Difference]: Start difference. First operand 1783 states and 2882 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:46:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:35,120 INFO L93 Difference]: Finished difference Result 4518 states and 7313 transitions. [2021-11-21 01:46:35,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:46:35,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2021-11-21 01:46:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:35,153 INFO L225 Difference]: With dead ends: 4518 [2021-11-21 01:46:35,154 INFO L226 Difference]: Without dead ends: 2753 [2021-11-21 01:46:35,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:46:35,170 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 1140 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:35,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 1936 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-21 01:46:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-11-21 01:46:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2635. [2021-11-21 01:46:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1815 states have (on average 1.5801652892561984) internal successors, (2868), 1914 states have internal predecessors, (2868), 669 states have call successors, (669), 130 states have call predecessors, (669), 150 states have return successors, (716), 634 states have call predecessors, (716), 664 states have call successors, (716) [2021-11-21 01:46:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4253 transitions. [2021-11-21 01:46:35,380 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4253 transitions. Word has length 88 [2021-11-21 01:46:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:35,381 INFO L470 AbstractCegarLoop]: Abstraction has 2635 states and 4253 transitions. [2021-11-21 01:46:35,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:46:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4253 transitions. [2021-11-21 01:46:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 01:46:35,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:35,385 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:35,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:46:35,386 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:35,386 INFO L85 PathProgramCache]: Analyzing trace with hash 762048878, now seen corresponding path program 1 times [2021-11-21 01:46:35,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:35,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483396252] [2021-11-21 01:46:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:35,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:46:35,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483396252] [2021-11-21 01:46:35,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483396252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:35,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:35,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:46:35,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882531528] [2021-11-21 01:46:35,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:35,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:46:35,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:35,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:46:35,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:46:35,540 INFO L87 Difference]: Start difference. First operand 2635 states and 4253 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:46:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:36,944 INFO L93 Difference]: Finished difference Result 7099 states and 11572 transitions. [2021-11-21 01:46:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:36,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2021-11-21 01:46:36,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:36,981 INFO L225 Difference]: With dead ends: 7099 [2021-11-21 01:46:36,981 INFO L226 Difference]: Without dead ends: 4480 [2021-11-21 01:46:36,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:36,998 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 1157 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:36,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1229 Valid, 966 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:46:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2021-11-21 01:46:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 4139. [2021-11-21 01:46:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 2859 states have (on average 1.5739769150052465) internal successors, (4500), 3022 states have internal predecessors, (4500), 1039 states have call successors, (1039), 195 states have call predecessors, (1039), 240 states have return successors, (1152), 981 states have call predecessors, (1152), 1034 states have call successors, (1152) [2021-11-21 01:46:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 6691 transitions. [2021-11-21 01:46:37,360 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 6691 transitions. Word has length 92 [2021-11-21 01:46:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:37,361 INFO L470 AbstractCegarLoop]: Abstraction has 4139 states and 6691 transitions. [2021-11-21 01:46:37,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:46:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 6691 transitions. [2021-11-21 01:46:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 01:46:37,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:37,368 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:37,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:46:37,369 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2146569476, now seen corresponding path program 1 times [2021-11-21 01:46:37,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:37,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077065818] [2021-11-21 01:46:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:37,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:46:37,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:37,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077065818] [2021-11-21 01:46:37,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077065818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:37,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:37,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:46:37,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775228953] [2021-11-21 01:46:37,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:37,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:46:37,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:46:37,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:46:37,483 INFO L87 Difference]: Start difference. First operand 4139 states and 6691 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:46:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:38,885 INFO L93 Difference]: Finished difference Result 11471 states and 18796 transitions. [2021-11-21 01:46:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:38,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2021-11-21 01:46:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:38,977 INFO L225 Difference]: With dead ends: 11471 [2021-11-21 01:46:38,978 INFO L226 Difference]: Without dead ends: 7349 [2021-11-21 01:46:39,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:39,003 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 1144 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:39,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 975 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:46:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-11-21 01:46:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 6954. [2021-11-21 01:46:39,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6954 states, 4818 states have (on average 1.5720215857202158) internal successors, (7574), 5121 states have internal predecessors, (7574), 1717 states have call successors, (1717), 325 states have call predecessors, (1717), 418 states have return successors, (2000), 1607 states have call predecessors, (2000), 1712 states have call successors, (2000) [2021-11-21 01:46:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6954 states to 6954 states and 11291 transitions. [2021-11-21 01:46:39,568 INFO L78 Accepts]: Start accepts. Automaton has 6954 states and 11291 transitions. Word has length 93 [2021-11-21 01:46:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:39,569 INFO L470 AbstractCegarLoop]: Abstraction has 6954 states and 11291 transitions. [2021-11-21 01:46:39,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:46:39,569 INFO L276 IsEmpty]: Start isEmpty. Operand 6954 states and 11291 transitions. [2021-11-21 01:46:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-21 01:46:39,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:39,573 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:39,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:46:39,574 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2119421328, now seen corresponding path program 1 times [2021-11-21 01:46:39,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:39,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622539412] [2021-11-21 01:46:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:39,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:46:39,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:39,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622539412] [2021-11-21 01:46:39,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622539412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:39,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:39,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:46:39,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706252742] [2021-11-21 01:46:39,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:39,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:46:39,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:46:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:46:39,682 INFO L87 Difference]: Start difference. First operand 6954 states and 11291 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:46:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:41,310 INFO L93 Difference]: Finished difference Result 19986 states and 33155 transitions. [2021-11-21 01:46:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:41,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2021-11-21 01:46:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:41,409 INFO L225 Difference]: With dead ends: 19986 [2021-11-21 01:46:41,409 INFO L226 Difference]: Without dead ends: 13051 [2021-11-21 01:46:41,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:41,461 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 1131 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:41,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 984 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:46:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13051 states. [2021-11-21 01:46:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13051 to 12519. [2021-11-21 01:46:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12519 states, 8681 states have (on average 1.5680221172675959) internal successors, (13612), 9276 states have internal predecessors, (13612), 3051 states have call successors, (3051), 585 states have call predecessors, (3051), 786 states have return successors, (3854), 2837 states have call predecessors, (3854), 3046 states have call successors, (3854) [2021-11-21 01:46:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12519 states to 12519 states and 20517 transitions. [2021-11-21 01:46:42,500 INFO L78 Accepts]: Start accepts. Automaton has 12519 states and 20517 transitions. Word has length 94 [2021-11-21 01:46:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:42,503 INFO L470 AbstractCegarLoop]: Abstraction has 12519 states and 20517 transitions. [2021-11-21 01:46:42,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:46:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 12519 states and 20517 transitions. [2021-11-21 01:46:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-21 01:46:42,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:42,507 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:42,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:46:42,508 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:42,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1277824834, now seen corresponding path program 1 times [2021-11-21 01:46:42,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:42,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483096260] [2021-11-21 01:46:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:42,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:46:42,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:42,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483096260] [2021-11-21 01:46:42,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483096260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:42,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:42,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:46:42,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587174264] [2021-11-21 01:46:42,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:42,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:46:42,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:42,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:46:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:46:42,628 INFO L87 Difference]: Start difference. First operand 12519 states and 20517 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:46:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:44,759 INFO L93 Difference]: Finished difference Result 36831 states and 62578 transitions. [2021-11-21 01:46:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2021-11-21 01:46:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:44,899 INFO L225 Difference]: With dead ends: 36831 [2021-11-21 01:46:44,899 INFO L226 Difference]: Without dead ends: 24335 [2021-11-21 01:46:44,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:44,948 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 1118 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:44,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 996 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:46:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24335 states. [2021-11-21 01:46:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24335 to 23500. [2021-11-21 01:46:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23500 states, 16284 states have (on average 1.5623925325472856) internal successors, (25442), 17487 states have internal predecessors, (25442), 5669 states have call successors, (5669), 1105 states have call predecessors, (5669), 1546 states have return successors, (8124), 5247 states have call predecessors, (8124), 5664 states have call successors, (8124) [2021-11-21 01:46:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23500 states to 23500 states and 39235 transitions. [2021-11-21 01:46:46,901 INFO L78 Accepts]: Start accepts. Automaton has 23500 states and 39235 transitions. Word has length 95 [2021-11-21 01:46:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:46,902 INFO L470 AbstractCegarLoop]: Abstraction has 23500 states and 39235 transitions. [2021-11-21 01:46:46,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:46:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 23500 states and 39235 transitions. [2021-11-21 01:46:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-21 01:46:46,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:46,908 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:46,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:46:46,909 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:46,909 INFO L85 PathProgramCache]: Analyzing trace with hash -958133390, now seen corresponding path program 1 times [2021-11-21 01:46:46,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:46,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790026838] [2021-11-21 01:46:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:46,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:46:47,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:47,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790026838] [2021-11-21 01:46:47,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790026838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:47,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:47,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:46:47,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375197067] [2021-11-21 01:46:47,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:47,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:46:47,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:47,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:46:47,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:46:47,023 INFO L87 Difference]: Start difference. First operand 23500 states and 39235 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:46:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:50,134 INFO L93 Difference]: Finished difference Result 70293 states and 124758 transitions. [2021-11-21 01:46:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:50,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2021-11-21 01:46:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:50,431 INFO L225 Difference]: With dead ends: 70293 [2021-11-21 01:46:50,431 INFO L226 Difference]: Without dead ends: 46814 [2021-11-21 01:46:50,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:50,557 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 1127 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:50,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1195 Valid, 990 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:46:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46814 states. [2021-11-21 01:46:53,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46814 to 44953. [2021-11-21 01:46:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44953 states, 31143 states have (on average 1.559194682593199) internal successors, (48558), 33514 states have internal predecessors, (48558), 10796 states have call successors, (10796), 2141 states have call predecessors, (10796), 3013 states have return successors, (17949), 9957 states have call predecessors, (17949), 10791 states have call successors, (17949) [2021-11-21 01:46:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44953 states to 44953 states and 77303 transitions. [2021-11-21 01:46:53,914 INFO L78 Accepts]: Start accepts. Automaton has 44953 states and 77303 transitions. Word has length 96 [2021-11-21 01:46:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:53,915 INFO L470 AbstractCegarLoop]: Abstraction has 44953 states and 77303 transitions. [2021-11-21 01:46:53,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:46:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 44953 states and 77303 transitions. [2021-11-21 01:46:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-21 01:46:53,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:53,926 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:53,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:46:53,926 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:53,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:53,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1386158495, now seen corresponding path program 1 times [2021-11-21 01:46:53,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:53,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595780885] [2021-11-21 01:46:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:53,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-21 01:46:54,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:54,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595780885] [2021-11-21 01:46:54,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595780885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:54,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:54,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:46:54,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861664752] [2021-11-21 01:46:54,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:54,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:46:54,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:54,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:46:54,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:46:54,378 INFO L87 Difference]: Start difference. First operand 44953 states and 77303 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 01:46:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:57,204 INFO L93 Difference]: Finished difference Result 91572 states and 162244 transitions. [2021-11-21 01:46:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:57,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 144 [2021-11-21 01:46:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:57,516 INFO L225 Difference]: With dead ends: 91572 [2021-11-21 01:46:57,517 INFO L226 Difference]: Without dead ends: 46636 [2021-11-21 01:46:57,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:57,772 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 30 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:57,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1672 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:46:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46636 states. [2021-11-21 01:47:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46636 to 45151. [2021-11-21 01:47:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45151 states, 31341 states have (on average 1.5556619125107687) internal successors, (48756), 33712 states have internal predecessors, (48756), 10796 states have call successors, (10796), 2141 states have call predecessors, (10796), 3013 states have return successors, (17949), 9957 states have call predecessors, (17949), 10791 states have call successors, (17949) [2021-11-21 01:47:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45151 states to 45151 states and 77501 transitions. [2021-11-21 01:47:00,994 INFO L78 Accepts]: Start accepts. Automaton has 45151 states and 77501 transitions. Word has length 144 [2021-11-21 01:47:00,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:00,995 INFO L470 AbstractCegarLoop]: Abstraction has 45151 states and 77501 transitions. [2021-11-21 01:47:00,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 01:47:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 45151 states and 77501 transitions. [2021-11-21 01:47:01,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-21 01:47:01,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:01,012 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:01,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:47:01,013 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:01,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1400713523, now seen corresponding path program 1 times [2021-11-21 01:47:01,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:01,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595269587] [2021-11-21 01:47:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:01,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-21 01:47:01,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:01,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595269587] [2021-11-21 01:47:01,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595269587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:01,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498598095] [2021-11-21 01:47:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:01,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:01,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:01,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:01,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:47:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:01,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:47:01,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:47:01,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:47:01,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498598095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:01,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:47:01,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-11-21 01:47:01,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799530192] [2021-11-21 01:47:01,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:01,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:47:01,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:01,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:47:01,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:47:01,990 INFO L87 Difference]: Start difference. First operand 45151 states and 77501 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:47:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:04,924 INFO L93 Difference]: Finished difference Result 92859 states and 165808 transitions. [2021-11-21 01:47:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:47:04,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 147 [2021-11-21 01:47:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:05,192 INFO L225 Difference]: With dead ends: 92859 [2021-11-21 01:47:05,192 INFO L226 Difference]: Without dead ends: 47725 [2021-11-21 01:47:05,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:47:05,410 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 213 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:05,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1461 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:47:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47725 states. [2021-11-21 01:47:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47725 to 47725. [2021-11-21 01:47:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47725 states, 33849 states have (on average 1.5827350881857662) internal successors, (53574), 36220 states have internal predecessors, (53574), 10796 states have call successors, (10796), 2207 states have call predecessors, (10796), 3079 states have return successors, (17949), 9957 states have call predecessors, (17949), 10791 states have call successors, (17949) [2021-11-21 01:47:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47725 states to 47725 states and 82319 transitions. [2021-11-21 01:47:08,480 INFO L78 Accepts]: Start accepts. Automaton has 47725 states and 82319 transitions. Word has length 147 [2021-11-21 01:47:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:08,481 INFO L470 AbstractCegarLoop]: Abstraction has 47725 states and 82319 transitions. [2021-11-21 01:47:08,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:47:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 47725 states and 82319 transitions. [2021-11-21 01:47:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-21 01:47:08,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:08,493 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:08,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:08,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:47:08,721 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1119585916, now seen corresponding path program 1 times [2021-11-21 01:47:08,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:08,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551969997] [2021-11-21 01:47:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:08,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:47:08,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551969997] [2021-11-21 01:47:08,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551969997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970813163] [2021-11-21 01:47:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:08,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:08,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:08,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:08,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:47:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:09,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:47:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:47:09,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:47:09,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970813163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:09,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:47:09,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-21 01:47:09,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773031732] [2021-11-21 01:47:09,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:09,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:47:09,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:09,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:47:09,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:47:09,571 INFO L87 Difference]: Start difference. First operand 47725 states and 82319 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:47:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:11,960 INFO L93 Difference]: Finished difference Result 98007 states and 175180 transitions. [2021-11-21 01:47:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:47:11,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 152 [2021-11-21 01:47:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:12,447 INFO L225 Difference]: With dead ends: 98007 [2021-11-21 01:47:12,448 INFO L226 Difference]: Without dead ends: 50299 [2021-11-21 01:47:12,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:47:12,671 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 211 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:12,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1461 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:47:12,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50299 states. [2021-11-21 01:47:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50299 to 50299. [2021-11-21 01:47:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50299 states, 36357 states have (on average 1.6060731083422726) internal successors, (58392), 38728 states have internal predecessors, (58392), 10796 states have call successors, (10796), 2273 states have call predecessors, (10796), 3145 states have return successors, (17949), 9957 states have call predecessors, (17949), 10791 states have call successors, (17949) [2021-11-21 01:47:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50299 states to 50299 states and 87137 transitions. [2021-11-21 01:47:15,566 INFO L78 Accepts]: Start accepts. Automaton has 50299 states and 87137 transitions. Word has length 152 [2021-11-21 01:47:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:15,566 INFO L470 AbstractCegarLoop]: Abstraction has 50299 states and 87137 transitions. [2021-11-21 01:47:15,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:47:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 50299 states and 87137 transitions. [2021-11-21 01:47:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-21 01:47:15,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:15,576 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:15,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:15,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:15,789 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:15,790 INFO L85 PathProgramCache]: Analyzing trace with hash -487946126, now seen corresponding path program 1 times [2021-11-21 01:47:15,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:15,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073005412] [2021-11-21 01:47:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:15,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-21 01:47:16,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:16,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073005412] [2021-11-21 01:47:16,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073005412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:16,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473075896] [2021-11-21 01:47:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:16,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:16,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:16,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:16,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a18033c-d3f4-4439-8c24-8a7d25cfeebf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:47:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:16,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 2074 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:47:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:47:17,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:47:17,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473075896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:17,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:47:17,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2021-11-21 01:47:17,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978210187] [2021-11-21 01:47:17,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:17,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:47:17,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:17,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:47:17,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:47:17,108 INFO L87 Difference]: Start difference. First operand 50299 states and 87137 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:47:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:19,717 INFO L93 Difference]: Finished difference Result 103155 states and 184552 transitions. [2021-11-21 01:47:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:47:19,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 156 [2021-11-21 01:47:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:19,991 INFO L225 Difference]: With dead ends: 103155 [2021-11-21 01:47:19,991 INFO L226 Difference]: Without dead ends: 52873 [2021-11-21 01:47:20,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:47:20,327 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 209 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:20,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1461 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:47:20,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52873 states.