./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH --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 827c6a0a903ee2dd9d6de5500eef639772e7bd12edc6080e253acc719dee066a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:19:00,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:19:00,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:19:00,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:19:00,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:19:00,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:19:00,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:19:00,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:19:00,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:19:00,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:19:00,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:19:00,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:19:00,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:19:00,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:19:00,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:19:00,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:19:00,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:19:00,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:19:00,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:19:00,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:19:00,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:19:00,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:19:00,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:19:00,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:19:00,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:19:00,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:19:00,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:19:00,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:19:00,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:19:00,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:19:00,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:19:00,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:19:00,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:19:00,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:19:00,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:19:00,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:19:00,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:19:00,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:19:00,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:19:00,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:19:00,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:19:00,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:19:00,535 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:19:00,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:19:00,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:19:00,537 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:19:00,537 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:19:00,538 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:19:00,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:19:00,538 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:19:00,539 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:19:00,539 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:19:00,539 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:19:00,539 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:19:00,540 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:19:00,540 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:19:00,540 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:19:00,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:19:00,548 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:19:00,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:19:00,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:19:00,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:19:00,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:19:00,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:19:00,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:19:00,550 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:19:00,551 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:19:00,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:19:00,551 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:19:00,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:19:00,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:19:00,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:19:00,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:19:00,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:19:00,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:19:00,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:19:00,558 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:19:00,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:19:00,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:19:00,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:19:00,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:19:00,561 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_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 827c6a0a903ee2dd9d6de5500eef639772e7bd12edc6080e253acc719dee066a [2021-11-03 04:19:00,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:19:00,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:19:00,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:19:00,930 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:19:00,931 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:19:00,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c [2021-11-03 04:19:01,054 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/data/7280cb8e8/af90f42c3e944e7a8826fd1faa382f06/FLAG65ea0f655 [2021-11-03 04:19:02,108 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:19:02,109 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c [2021-11-03 04:19:02,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/data/7280cb8e8/af90f42c3e944e7a8826fd1faa382f06/FLAG65ea0f655 [2021-11-03 04:19:02,468 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/data/7280cb8e8/af90f42c3e944e7a8826fd1faa382f06 [2021-11-03 04:19:02,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:19:02,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:19:02,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:19:02,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:19:02,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:19:02,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:02,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d60a181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02, skipping insertion in model container [2021-11-03 04:19:02,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:02,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:19:02,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:19:03,284 WARN L228 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_4b366819-b3af-4c70-b9d9-d09cfcc94adb/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c[20581,20594] [2021-11-03 04:19:03,389 WARN L228 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_4b366819-b3af-4c70-b9d9-d09cfcc94adb/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c[27628,27641] [2021-11-03 04:19:04,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:19:04,696 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:19:04,794 WARN L228 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_4b366819-b3af-4c70-b9d9-d09cfcc94adb/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c[20581,20594] [2021-11-03 04:19:04,857 WARN L228 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_4b366819-b3af-4c70-b9d9-d09cfcc94adb/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c[27628,27641] [2021-11-03 04:19:05,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:19:05,601 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:19:05,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05 WrapperNode [2021-11-03 04:19:05,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:19:05,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:19:05,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:19:05,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:19:05,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:05,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:06,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:19:06,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:19:06,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:19:06,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:19:06,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:06,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:06,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:06,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:07,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:07,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:07,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:07,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:19:07,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:19:07,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:19:07,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:19:07,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (1/1) ... [2021-11-03 04:19:07,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:19:07,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:07,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:19:07,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:19:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:19:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:19:07,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:19:07,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:32:36,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:32:36,865 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2021-11-03 04:32:36,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:32:36 BoogieIcfgContainer [2021-11-03 04:32:36,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:32:36,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:32:36,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:32:36,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:32:36,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:19:02" (1/3) ... [2021-11-03 04:32:36,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc76218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:32:36, skipping insertion in model container [2021-11-03 04:32:36,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:05" (2/3) ... [2021-11-03 04:32:36,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc76218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:32:36, skipping insertion in model container [2021-11-03 04:32:36,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:32:36" (3/3) ... [2021-11-03 04:32:36,911 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c [2021-11-03 04:32:36,924 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:32:36,924 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 04:32:37,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:32:37,063 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 [2021-11-03 04:32:37,063 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 04:32:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:32:37,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:37,132 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:32:37,133 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:37,145 INFO L85 PathProgramCache]: Analyzing trace with hash -466576549, now seen corresponding path program 1 times [2021-11-03 04:32:37,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:37,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341141371] [2021-11-03 04:32:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:37,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:37,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:37,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341141371] [2021-11-03 04:32:37,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341141371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:37,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:37,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:32:37,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203363643] [2021-11-03 04:32:37,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:32:37,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:32:37,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:37,720 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:38,731 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-11-03 04:32:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:32:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:38,742 INFO L225 Difference]: With dead ends: 47 [2021-11-03 04:32:38,743 INFO L226 Difference]: Without dead ends: 22 [2021-11-03 04:32:38,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-03 04:32:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-03 04:32:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-03 04:32:38,806 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 6 [2021-11-03 04:32:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:38,807 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-03 04:32:38,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-03 04:32:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 04:32:38,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:38,809 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:38,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:32:38,810 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:38,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1022650430, now seen corresponding path program 1 times [2021-11-03 04:32:38,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:38,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250692375] [2021-11-03 04:32:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:38,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:39,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:39,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250692375] [2021-11-03 04:32:39,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250692375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:39,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:39,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:39,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189512727] [2021-11-03 04:32:39,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:32:39,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:32:39,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:39,434 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:39,606 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-03 04:32:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:32:39,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-03 04:32:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:39,608 INFO L225 Difference]: With dead ends: 42 [2021-11-03 04:32:39,608 INFO L226 Difference]: Without dead ends: 32 [2021-11-03 04:32:39,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:39,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-03 04:32:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-03 04:32:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-03 04:32:39,619 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2021-11-03 04:32:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:39,619 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-03 04:32:39,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-03 04:32:39,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:32:39,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:39,626 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:39,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:32:39,627 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:39,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash 788314710, now seen corresponding path program 1 times [2021-11-03 04:32:39,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:39,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407625397] [2021-11-03 04:32:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:39,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:39,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:39,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407625397] [2021-11-03 04:32:39,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407625397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:39,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:39,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:39,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737642516] [2021-11-03 04:32:39,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:32:39,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:39,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:32:39,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:39,899 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:40,040 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-11-03 04:32:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:32:40,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-03 04:32:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:40,043 INFO L225 Difference]: With dead ends: 42 [2021-11-03 04:32:40,043 INFO L226 Difference]: Without dead ends: 32 [2021-11-03 04:32:40,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-03 04:32:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-11-03 04:32:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-03 04:32:40,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-11-03 04:32:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:40,057 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-03 04:32:40,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-03 04:32:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:32:40,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:40,061 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:40,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:32:40,061 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:40,063 INFO L85 PathProgramCache]: Analyzing trace with hash 629469098, now seen corresponding path program 1 times [2021-11-03 04:32:40,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:40,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181363944] [2021-11-03 04:32:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:40,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:40,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:40,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181363944] [2021-11-03 04:32:40,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181363944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:40,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:40,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:32:40,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877812376] [2021-11-03 04:32:40,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:32:40,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:32:40,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:40,669 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:40,875 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-11-03 04:32:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:32:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-03 04:32:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:40,881 INFO L225 Difference]: With dead ends: 42 [2021-11-03 04:32:40,881 INFO L226 Difference]: Without dead ends: 32 [2021-11-03 04:32:40,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-03 04:32:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-11-03 04:32:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-03 04:32:40,891 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 9 [2021-11-03 04:32:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:40,892 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-03 04:32:40,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-03 04:32:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:32:40,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:40,893 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:40,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:32:40,894 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:40,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1929609742, now seen corresponding path program 1 times [2021-11-03 04:32:40,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:40,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562142506] [2021-11-03 04:32:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:40,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:41,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:41,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562142506] [2021-11-03 04:32:41,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562142506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:41,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:41,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 04:32:41,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807921597] [2021-11-03 04:32:41,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:41,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:41,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:41,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:41,107 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:41,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:41,336 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-03 04:32:41,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:32:41,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:32:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:41,338 INFO L225 Difference]: With dead ends: 46 [2021-11-03 04:32:41,339 INFO L226 Difference]: Without dead ends: 44 [2021-11-03 04:32:41,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:32:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-03 04:32:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2021-11-03 04:32:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-03 04:32:41,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2021-11-03 04:32:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:41,349 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-03 04:32:41,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-03 04:32:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:32:41,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:41,351 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:41,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:32:41,352 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:41,353 INFO L85 PathProgramCache]: Analyzing trace with hash -38443453, now seen corresponding path program 1 times [2021-11-03 04:32:41,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:41,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526066763] [2021-11-03 04:32:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:41,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:51,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:51,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526066763] [2021-11-03 04:32:51,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526066763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:32:51,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113994305] [2021-11-03 04:32:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:51,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:32:51,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:32:51,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:32:52,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b366819-b3af-4c70-b9d9-d09cfcc94adb/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:32:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:53,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:32:53,396 INFO L286 TraceCheckSpWp]: Computing forward predicates...