./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.13.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_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/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_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/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_a7e210c1-800b-4b76-8a75-345a461a2a96/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 5975f0f3825b3a6653676f33bd69d14e1e58fcf0306bfb5508ab91dc8951d6c4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:05:23,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:05:23,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:05:23,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:05:23,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:05:23,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:05:23,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:05:23,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:05:23,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:05:23,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:05:23,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:05:23,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:05:23,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:05:23,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:05:23,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:05:23,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:05:23,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:05:23,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:05:23,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:05:23,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:05:23,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:05:23,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:05:23,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:05:23,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:05:23,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:05:23,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:05:23,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:05:23,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:05:23,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:05:23,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:05:23,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:05:23,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:05:23,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:05:23,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:05:23,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:05:23,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:05:23,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:05:23,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:05:23,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:05:23,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:05:23,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:05:23,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:05:23,354 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:05:23,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:05:23,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:05:23,355 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:05:23,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:05:23,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:05:23,364 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:05:23,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:05:23,364 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:05:23,364 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:05:23,365 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:05:23,365 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:05:23,365 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:05:23,365 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:05:23,366 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:05:23,366 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:05:23,366 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:05:23,366 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:05:23,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:05:23,367 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:05:23,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:05:23,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:05:23,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:05:23,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:05:23,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:05:23,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:05:23,369 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:05:23,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:05:23,369 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:05:23,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:05:23,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:05:23,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:05:23,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:05:23,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:05:23,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:05:23,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:05:23,371 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:05:23,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:05:23,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:05:23,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:05:23,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:05:23,372 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_a7e210c1-800b-4b76-8a75-345a461a2a96/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5975f0f3825b3a6653676f33bd69d14e1e58fcf0306bfb5508ab91dc8951d6c4 [2021-11-21 00:05:23,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:05:23,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:05:23,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:05:23,753 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:05:23,754 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:05:23,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/systemc/transmitter.13.cil.c [2021-11-21 00:05:23,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/data/c1a69dc89/4235c32a5f3d4c0d9de1617d6cbf4923/FLAG64ad76a7f [2021-11-21 00:05:24,441 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:05:24,442 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/sv-benchmarks/c/systemc/transmitter.13.cil.c [2021-11-21 00:05:24,469 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/data/c1a69dc89/4235c32a5f3d4c0d9de1617d6cbf4923/FLAG64ad76a7f [2021-11-21 00:05:24,746 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/data/c1a69dc89/4235c32a5f3d4c0d9de1617d6cbf4923 [2021-11-21 00:05:24,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:05:24,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:05:24,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:05:24,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:05:24,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:05:24,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:05:24" (1/1) ... [2021-11-21 00:05:24,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5635f8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:24, skipping insertion in model container [2021-11-21 00:05:24,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:05:24" (1/1) ... [2021-11-21 00:05:24,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:05:24,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:05:25,075 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_a7e210c1-800b-4b76-8a75-345a461a2a96/sv-benchmarks/c/systemc/transmitter.13.cil.c[706,719] [2021-11-21 00:05:25,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:05:25,385 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:05:25,403 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_a7e210c1-800b-4b76-8a75-345a461a2a96/sv-benchmarks/c/systemc/transmitter.13.cil.c[706,719] [2021-11-21 00:05:25,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:05:25,570 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:05:25,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25 WrapperNode [2021-11-21 00:05:25,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:05:25,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:05:25,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:05:25,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:05:25,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (1/1) ... [2021-11-21 00:05:25,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (1/1) ... [2021-11-21 00:05:25,696 INFO L137 Inliner]: procedures = 54, calls = 69, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 891 [2021-11-21 00:05:25,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:05:25,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:05:25,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:05:25,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:05:25,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (1/1) ... [2021-11-21 00:05:25,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (1/1) ... [2021-11-21 00:05:25,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (1/1) ... [2021-11-21 00:05:25,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (1/1) ... [2021-11-21 00:05:25,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (1/1) ... [2021-11-21 00:05:25,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (1/1) ... [2021-11-21 00:05:25,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (1/1) ... [2021-11-21 00:05:25,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:05:25,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:05:25,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:05:25,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:05:25,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (1/1) ... [2021-11-21 00:05:25,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:05:25,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:25,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:05:25,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e210c1-800b-4b76-8a75-345a461a2a96/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:05:25,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:05:25,914 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 00:05:25,914 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 00:05:25,915 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 00:05:25,915 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 00:05:25,916 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 00:05:25,916 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 00:05:25,916 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 00:05:25,916 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 00:05:25,917 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 00:05:25,917 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 00:05:25,917 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 00:05:25,917 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 00:05:25,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:05:25,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:05:25,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:05:26,101 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:05:26,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:05:27,117 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:05:27,646 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:05:27,647 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-21 00:05:27,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:05:27 BoogieIcfgContainer [2021-11-21 00:05:27,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:05:27,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:05:27,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:05:27,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:05:27,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:05:24" (1/3) ... [2021-11-21 00:05:27,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b14481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:05:27, skipping insertion in model container [2021-11-21 00:05:27,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:25" (2/3) ... [2021-11-21 00:05:27,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b14481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:05:27, skipping insertion in model container [2021-11-21 00:05:27,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:05:27" (3/3) ... [2021-11-21 00:05:27,675 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.13.cil.c [2021-11-21 00:05:27,681 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:05:27,681 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:05:27,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:05:27,761 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 00:05:27,761 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:05:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 163 states have (on average 1.5644171779141105) internal successors, (255), 165 states have internal predecessors, (255), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-21 00:05:27,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:05:27,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:27,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:27,825 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:27,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:27,830 INFO L85 PathProgramCache]: Analyzing trace with hash -383573431, now seen corresponding path program 1 times [2021-11-21 00:05:27,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:27,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555034632] [2021-11-21 00:05:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:27,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:28,366 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 00:05:28,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:28,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555034632] [2021-11-21 00:05:28,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555034632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:28,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:28,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:05:28,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007990384] [2021-11-21 00:05:28,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:28,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:05:28,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:28,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:05:28,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:05:28,424 INFO L87 Difference]: Start difference. First operand has 197 states, 163 states have (on average 1.5644171779141105) internal successors, (255), 165 states have internal predecessors, (255), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:29,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:29,059 INFO L93 Difference]: Finished difference Result 574 states and 925 transitions. [2021-11-21 00:05:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:05:29,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2021-11-21 00:05:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:29,089 INFO L225 Difference]: With dead ends: 574 [2021-11-21 00:05:29,089 INFO L226 Difference]: Without dead ends: 378 [2021-11-21 00:05:29,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:05:29,105 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 532 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:29,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 854 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:05:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-21 00:05:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 375. [2021-11-21 00:05:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 315 states have (on average 1.5238095238095237) internal successors, (480), 316 states have internal predecessors, (480), 47 states have call successors, (47), 12 states have call predecessors, (47), 12 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-21 00:05:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 574 transitions. [2021-11-21 00:05:29,231 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 574 transitions. Word has length 81 [2021-11-21 00:05:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:29,232 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 574 transitions. [2021-11-21 00:05:29,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 574 transitions. [2021-11-21 00:05:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:05:29,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:29,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:29,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:05:29,247 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:29,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1956072650, now seen corresponding path program 1 times [2021-11-21 00:05:29,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:29,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505151214] [2021-11-21 00:05:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:29,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:29,407 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 00:05:29,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:29,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505151214] [2021-11-21 00:05:29,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505151214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:29,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:29,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:05:29,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445353776] [2021-11-21 00:05:29,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:29,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:05:29,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:05:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:05:29,412 INFO L87 Difference]: Start difference. First operand 375 states and 574 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:30,192 INFO L93 Difference]: Finished difference Result 1287 states and 1995 transitions. [2021-11-21 00:05:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:05:30,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2021-11-21 00:05:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:30,202 INFO L225 Difference]: With dead ends: 1287 [2021-11-21 00:05:30,203 INFO L226 Difference]: Without dead ends: 890 [2021-11-21 00:05:30,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 00:05:30,207 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 1136 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:30,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1362 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:05:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-11-21 00:05:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 878. [2021-11-21 00:05:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 757 states have (on average 1.513870541611625) internal successors, (1146), 746 states have internal predecessors, (1146), 92 states have call successors, (92), 26 states have call predecessors, (92), 28 states have return successors, (106), 106 states have call predecessors, (106), 92 states have call successors, (106) [2021-11-21 00:05:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1344 transitions. [2021-11-21 00:05:30,271 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1344 transitions. Word has length 81 [2021-11-21 00:05:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:30,273 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1344 transitions. [2021-11-21 00:05:30,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1344 transitions. [2021-11-21 00:05:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:05:30,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:30,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:30,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:05:30,279 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1961251829, now seen corresponding path program 1 times [2021-11-21 00:05:30,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:30,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828713248] [2021-11-21 00:05:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:30,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:30,406 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 00:05:30,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:30,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828713248] [2021-11-21 00:05:30,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828713248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:30,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:30,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:05:30,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575222429] [2021-11-21 00:05:30,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:30,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:05:30,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:30,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:05:30,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:05:30,410 INFO L87 Difference]: Start difference. First operand 878 states and 1344 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:31,108 INFO L93 Difference]: Finished difference Result 3089 states and 4796 transitions. [2021-11-21 00:05:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:05:31,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2021-11-21 00:05:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:31,128 INFO L225 Difference]: With dead ends: 3089 [2021-11-21 00:05:31,129 INFO L226 Difference]: Without dead ends: 2165 [2021-11-21 00:05:31,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 00:05:31,136 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1136 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:31,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1124 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:05:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-11-21 00:05:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1681. [2021-11-21 00:05:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1452 states have (on average 1.5151515151515151) internal successors, (2200), 1442 states have internal predecessors, (2200), 172 states have call successors, (172), 50 states have call predecessors, (172), 56 states have return successors, (213), 189 states have call predecessors, (213), 172 states have call successors, (213) [2021-11-21 00:05:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 2585 transitions. [2021-11-21 00:05:31,321 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 2585 transitions. Word has length 81 [2021-11-21 00:05:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:31,324 INFO L470 AbstractCegarLoop]: Abstraction has 1681 states and 2585 transitions. [2021-11-21 00:05:31,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 2585 transitions. [2021-11-21 00:05:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:05:31,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:31,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:31,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:05:31,330 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash -141525910, now seen corresponding path program 1 times [2021-11-21 00:05:31,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:31,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88665999] [2021-11-21 00:05:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:31,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:31,503 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 00:05:31,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88665999] [2021-11-21 00:05:31,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88665999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:31,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:31,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:05:31,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169234478] [2021-11-21 00:05:31,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:31,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:05:31,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:31,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:05:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:05:31,506 INFO L87 Difference]: Start difference. First operand 1681 states and 2585 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:32,138 INFO L93 Difference]: Finished difference Result 5004 states and 7834 transitions. [2021-11-21 00:05:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:05:32,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2021-11-21 00:05:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:32,178 INFO L225 Difference]: With dead ends: 5004 [2021-11-21 00:05:32,178 INFO L226 Difference]: Without dead ends: 3328 [2021-11-21 00:05:32,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:05:32,203 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 547 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:32,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 852 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:05:32,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-11-21 00:05:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 3316. [2021-11-21 00:05:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 2871 states have (on average 1.507488679902473) internal successors, (4328), 2851 states have internal predecessors, (4328), 332 states have call successors, (332), 100 states have call predecessors, (332), 112 states have return successors, (411), 365 states have call predecessors, (411), 332 states have call successors, (411) [2021-11-21 00:05:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 5071 transitions. [2021-11-21 00:05:32,510 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 5071 transitions. Word has length 81 [2021-11-21 00:05:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:32,511 INFO L470 AbstractCegarLoop]: Abstraction has 3316 states and 5071 transitions. [2021-11-21 00:05:32,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 5071 transitions. [2021-11-21 00:05:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:05:32,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:32,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:32,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:05:32,515 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash -133775351, now seen corresponding path program 1 times [2021-11-21 00:05:32,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:32,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241138111] [2021-11-21 00:05:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:32,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:32,651 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 00:05:32,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:32,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241138111] [2021-11-21 00:05:32,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241138111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:32,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:32,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:05:32,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368336979] [2021-11-21 00:05:32,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:32,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:05:32,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:32,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:05:32,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:05:32,659 INFO L87 Difference]: Start difference. First operand 3316 states and 5071 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:33,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:33,474 INFO L93 Difference]: Finished difference Result 9881 states and 15377 transitions. [2021-11-21 00:05:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:05:33,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2021-11-21 00:05:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:33,550 INFO L225 Difference]: With dead ends: 9881 [2021-11-21 00:05:33,550 INFO L226 Difference]: Without dead ends: 6570 [2021-11-21 00:05:33,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:05:33,581 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 553 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:33,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 852 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:05:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6570 states. [2021-11-21 00:05:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6570 to 6548. [2021-11-21 00:05:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6548 states, 5679 states have (on average 1.4993836943123788) internal successors, (8515), 5640 states have internal predecessors, (8515), 644 states have call successors, (644), 200 states have call predecessors, (644), 224 states have return successors, (796), 708 states have call predecessors, (796), 644 states have call successors, (796) [2021-11-21 00:05:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6548 states to 6548 states and 9955 transitions. [2021-11-21 00:05:34,147 INFO L78 Accepts]: Start accepts. Automaton has 6548 states and 9955 transitions. Word has length 81 [2021-11-21 00:05:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:34,148 INFO L470 AbstractCegarLoop]: Abstraction has 6548 states and 9955 transitions. [2021-11-21 00:05:34,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6548 states and 9955 transitions. [2021-11-21 00:05:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:05:34,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:34,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:34,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:05:34,160 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:34,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1864112408, now seen corresponding path program 1 times [2021-11-21 00:05:34,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:34,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596743247] [2021-11-21 00:05:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:34,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:34,265 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 00:05:34,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:34,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596743247] [2021-11-21 00:05:34,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596743247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:34,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:34,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:05:34,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889661038] [2021-11-21 00:05:34,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:34,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:05:34,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:34,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:05:34,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:05:34,268 INFO L87 Difference]: Start difference. First operand 6548 states and 9955 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:35,612 INFO L93 Difference]: Finished difference Result 22369 states and 34638 transitions. [2021-11-21 00:05:35,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:05:35,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2021-11-21 00:05:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:35,798 INFO L225 Difference]: With dead ends: 22369 [2021-11-21 00:05:35,799 INFO L226 Difference]: Without dead ends: 15450 [2021-11-21 00:05:35,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 00:05:35,838 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1136 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:35,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1124 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:05:35,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15450 states. [2021-11-21 00:05:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15450 to 12664. [2021-11-21 00:05:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12664 states, 10979 states have (on average 1.498041716003279) internal successors, (16447), 10956 states have internal predecessors, (16447), 1236 states have call successors, (1236), 392 states have call predecessors, (1236), 448 states have return successors, (1580), 1316 states have call predecessors, (1580), 1236 states have call successors, (1580) [2021-11-21 00:05:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12664 states to 12664 states and 19263 transitions. [2021-11-21 00:05:37,011 INFO L78 Accepts]: Start accepts. Automaton has 12664 states and 19263 transitions. Word has length 81 [2021-11-21 00:05:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:37,013 INFO L470 AbstractCegarLoop]: Abstraction has 12664 states and 19263 transitions. [2021-11-21 00:05:37,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 12664 states and 19263 transitions. [2021-11-21 00:05:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:05:37,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:37,018 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:37,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:05:37,019 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1155752199, now seen corresponding path program 1 times [2021-11-21 00:05:37,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:37,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260336524] [2021-11-21 00:05:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:37,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:37,154 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 00:05:37,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:37,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260336524] [2021-11-21 00:05:37,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260336524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:37,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:37,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:05:37,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880979440] [2021-11-21 00:05:37,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:37,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:05:37,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:37,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:05:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:05:37,159 INFO L87 Difference]: Start difference. First operand 12664 states and 19263 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:38,996 INFO L93 Difference]: Finished difference Result 42621 states and 66146 transitions. [2021-11-21 00:05:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:05:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2021-11-21 00:05:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:39,270 INFO L225 Difference]: With dead ends: 42621 [2021-11-21 00:05:39,271 INFO L226 Difference]: Without dead ends: 29234 [2021-11-21 00:05:39,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 00:05:39,352 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1136 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:39,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1124 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:05:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29234 states. [2021-11-21 00:05:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29234 to 24736. [2021-11-21 00:05:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24736 states, 21451 states have (on average 1.4958277003403104) internal successors, (32087), 21460 states have internal predecessors, (32087), 2388 states have call successors, (2388), 776 states have call predecessors, (2388), 896 states have return successors, (3100), 2500 states have call predecessors, (3100), 2388 states have call successors, (3100) [2021-11-21 00:05:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24736 states to 24736 states and 37575 transitions. [2021-11-21 00:05:41,240 INFO L78 Accepts]: Start accepts. Automaton has 24736 states and 37575 transitions. Word has length 81 [2021-11-21 00:05:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:41,241 INFO L470 AbstractCegarLoop]: Abstraction has 24736 states and 37575 transitions. [2021-11-21 00:05:41,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 24736 states and 37575 transitions. [2021-11-21 00:05:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:05:41,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:41,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:41,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:05:41,245 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1679072870, now seen corresponding path program 1 times [2021-11-21 00:05:41,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:41,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735213872] [2021-11-21 00:05:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:41,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:41,330 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 00:05:41,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:41,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735213872] [2021-11-21 00:05:41,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735213872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:41,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:41,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:05:41,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785472791] [2021-11-21 00:05:41,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:41,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:05:41,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:05:41,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:05:41,337 INFO L87 Difference]: Start difference. First operand 24736 states and 37575 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:43,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:43,686 INFO L93 Difference]: Finished difference Result 73749 states and 114008 transitions. [2021-11-21 00:05:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:05:43,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2021-11-21 00:05:43,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:43,952 INFO L225 Difference]: With dead ends: 73749 [2021-11-21 00:05:43,953 INFO L226 Difference]: Without dead ends: 49018 [2021-11-21 00:05:44,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:05:44,034 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 568 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:44,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 852 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:05:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49018 states. [2021-11-21 00:05:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49018 to 48880. [2021-11-21 00:05:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48880 states, 42443 states have (on average 1.4862050279197982) internal successors, (63079), 42464 states have internal predecessors, (63079), 4644 states have call successors, (4644), 1552 states have call predecessors, (4644), 1792 states have return successors, (6008), 4864 states have call predecessors, (6008), 4644 states have call successors, (6008) [2021-11-21 00:05:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48880 states to 48880 states and 73731 transitions. [2021-11-21 00:05:47,204 INFO L78 Accepts]: Start accepts. Automaton has 48880 states and 73731 transitions. Word has length 81 [2021-11-21 00:05:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:47,205 INFO L470 AbstractCegarLoop]: Abstraction has 48880 states and 73731 transitions. [2021-11-21 00:05:47,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 48880 states and 73731 transitions. [2021-11-21 00:05:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:05:47,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:47,208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:47,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:05:47,210 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:47,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1564445337, now seen corresponding path program 1 times [2021-11-21 00:05:47,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:47,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381181824] [2021-11-21 00:05:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:47,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:47,360 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 00:05:47,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:47,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381181824] [2021-11-21 00:05:47,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381181824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:47,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:47,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:05:47,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839230647] [2021-11-21 00:05:47,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:47,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:05:47,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:05:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:05:47,365 INFO L87 Difference]: Start difference. First operand 48880 states and 73731 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:52,106 INFO L93 Difference]: Finished difference Result 154724 states and 233129 transitions. [2021-11-21 00:05:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:05:52,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2021-11-21 00:05:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:53,171 INFO L225 Difference]: With dead ends: 154724 [2021-11-21 00:05:53,172 INFO L226 Difference]: Without dead ends: 105850 [2021-11-21 00:05:53,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:05:53,369 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 1095 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:53,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1102 Valid, 964 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:05:53,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105850 states. [2021-11-21 00:05:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105850 to 82944. [2021-11-21 00:05:58,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82944 states, 72827 states have (on average 1.471693190712236) internal successors, (107179), 72868 states have internal predecessors, (107179), 7044 states have call successors, (7044), 2592 states have call predecessors, (7044), 3072 states have return successors, (9772), 7484 states have call predecessors, (9772), 7044 states have call successors, (9772) [2021-11-21 00:05:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82944 states to 82944 states and 123995 transitions. [2021-11-21 00:05:58,614 INFO L78 Accepts]: Start accepts. Automaton has 82944 states and 123995 transitions. Word has length 81 [2021-11-21 00:05:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:58,619 INFO L470 AbstractCegarLoop]: Abstraction has 82944 states and 123995 transitions. [2021-11-21 00:05:58,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:05:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 82944 states and 123995 transitions. [2021-11-21 00:05:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 00:05:58,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:58,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:58,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:05:58,625 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash 727492203, now seen corresponding path program 1 times [2021-11-21 00:05:58,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:58,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931135543] [2021-11-21 00:05:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:58,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:58,781 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 00:05:58,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931135543] [2021-11-21 00:05:58,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931135543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:58,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:58,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:05:58,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682910722] [2021-11-21 00:05:58,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:58,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:05:58,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:58,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:05:58,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:05:58,785 INFO L87 Difference]: Start difference. First operand 82944 states and 123995 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:06:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:08,183 INFO L93 Difference]: Finished difference Result 314516 states and 469494 transitions. [2021-11-21 00:06:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:06:08,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 82 [2021-11-21 00:06:08,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:09,689 INFO L225 Difference]: With dead ends: 314516 [2021-11-21 00:06:09,689 INFO L226 Difference]: Without dead ends: 231578 [2021-11-21 00:06:10,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:06:10,061 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 1154 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:10,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 854 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:06:10,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231578 states. [2021-11-21 00:06:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231578 to 163496. [2021-11-21 00:06:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163496 states, 143651 states have (on average 1.4672435277164795) internal successors, (210771), 143748 states have internal predecessors, (210771), 13700 states have call successors, (13700), 5184 states have call predecessors, (13700), 6144 states have return successors, (18916), 14564 states have call predecessors, (18916), 13700 states have call successors, (18916) [2021-11-21 00:06:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163496 states to 163496 states and 243387 transitions. [2021-11-21 00:06:21,827 INFO L78 Accepts]: Start accepts. Automaton has 163496 states and 243387 transitions. Word has length 82 [2021-11-21 00:06:21,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:21,828 INFO L470 AbstractCegarLoop]: Abstraction has 163496 states and 243387 transitions. [2021-11-21 00:06:21,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:06:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 163496 states and 243387 transitions. [2021-11-21 00:06:21,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-21 00:06:21,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:21,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:21,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:06:21,836 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:06:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash 490185776, now seen corresponding path program 1 times [2021-11-21 00:06:21,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:21,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127782303] [2021-11-21 00:06:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:21,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:21,958 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 00:06:21,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127782303] [2021-11-21 00:06:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127782303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:06:21,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:06:21,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:06:21,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674516336] [2021-11-21 00:06:21,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:06:21,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:06:21,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:06:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:06:21,963 INFO L87 Difference]: Start difference. First operand 163496 states and 243387 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)