./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.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_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/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_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/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_1df54f66-b362-4f55-920a-64191497fbc0/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 4d2ad25966f5b06d930031b35708c7035a644982dad73f08910281a8c7df501a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:20:21,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:20:21,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:20:21,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:20:21,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:20:21,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:20:21,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:20:21,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:20:21,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:20:21,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:20:21,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:20:21,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:20:21,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:20:21,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:20:21,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:20:21,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:20:21,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:20:21,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:20:21,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:20:21,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:20:21,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:20:21,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:20:21,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:20:21,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:20:21,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:20:21,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:20:21,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:20:21,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:20:21,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:20:21,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:20:21,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:20:21,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:20:21,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:20:21,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:20:21,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:20:21,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:20:21,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:20:21,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:20:21,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:20:21,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:20:21,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:20:21,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:20:21,566 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:20:21,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:20:21,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:20:21,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:20:21,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:20:21,577 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:20:21,577 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:20:21,577 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:20:21,577 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:20:21,578 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:20:21,579 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:20:21,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:20:21,580 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:20:21,580 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:20:21,580 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:20:21,581 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:20:21,581 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:20:21,581 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:20:21,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:20:21,583 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:20:21,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:20:21,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:20:21,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:20:21,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:20:21,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:20:21,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:20:21,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:20:21,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:20:21,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:20:21,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:20:21,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:20:21,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:20:21,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:21,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:20:21,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:20:21,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:20:21,591 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:20:21,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:20:21,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:20:21,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:20:21,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:20:21,592 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_1df54f66-b362-4f55-920a-64191497fbc0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d2ad25966f5b06d930031b35708c7035a644982dad73f08910281a8c7df501a [2021-11-21 00:20:21,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:20:21,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:20:21,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:20:21,884 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:20:21,885 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:20:21,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-21 00:20:22,015 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/data/de26fdad5/ed054a106a714f9491fa34df161c77a8/FLAG73868984e [2021-11-21 00:20:22,556 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:20:22,557 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-21 00:20:22,568 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/data/de26fdad5/ed054a106a714f9491fa34df161c77a8/FLAG73868984e [2021-11-21 00:20:22,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/data/de26fdad5/ed054a106a714f9491fa34df161c77a8 [2021-11-21 00:20:22,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:20:22,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:20:22,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:22,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:20:22,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:20:22,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b9009b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22, skipping insertion in model container [2021-11-21 00:20:22,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:20:22,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:20:23,237 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_1df54f66-b362-4f55-920a-64191497fbc0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2021-11-21 00:20:23,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:23,277 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:20:23,325 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_1df54f66-b362-4f55-920a-64191497fbc0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2021-11-21 00:20:23,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:23,395 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:20:23,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23 WrapperNode [2021-11-21 00:20:23,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:23,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:23,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:20:23,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:20:23,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (1/1) ... [2021-11-21 00:20:23,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (1/1) ... [2021-11-21 00:20:23,452 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 320 [2021-11-21 00:20:23,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:23,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:20:23,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:20:23,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:20:23,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (1/1) ... [2021-11-21 00:20:23,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (1/1) ... [2021-11-21 00:20:23,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (1/1) ... [2021-11-21 00:20:23,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (1/1) ... [2021-11-21 00:20:23,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (1/1) ... [2021-11-21 00:20:23,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (1/1) ... [2021-11-21 00:20:23,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (1/1) ... [2021-11-21 00:20:23,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:20:23,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:20:23,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:20:23,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:20:23,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (1/1) ... [2021-11-21 00:20:23,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:23,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:23,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:20:23,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:20:23,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:20:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:20:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:20:23,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:20:23,690 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:20:23,691 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:20:24,077 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:20:24,321 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:20:24,326 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:20:24,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:24 BoogieIcfgContainer [2021-11-21 00:20:24,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:20:24,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:20:24,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:20:24,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:20:24,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:20:22" (1/3) ... [2021-11-21 00:20:24,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af05fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:24, skipping insertion in model container [2021-11-21 00:20:24,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:23" (2/3) ... [2021-11-21 00:20:24,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af05fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:24, skipping insertion in model container [2021-11-21 00:20:24,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:24" (3/3) ... [2021-11-21 00:20:24,341 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-21 00:20:24,354 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:20:24,354 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:20:24,411 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:20:24,420 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 00:20:24,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:20:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 58 states have internal predecessors, (96), 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) [2021-11-21 00:20:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:20:24,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:24,448 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] [2021-11-21 00:20:24,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1038232587, now seen corresponding path program 1 times [2021-11-21 00:20:24,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:24,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058165161] [2021-11-21 00:20:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:24,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:24,931 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 00:20:24,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:24,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058165161] [2021-11-21 00:20:24,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058165161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:24,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:24,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:24,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726882921] [2021-11-21 00:20:24,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:24,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:24,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:24,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:24,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:24,993 INFO L87 Difference]: Start difference. First operand has 59 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 58 states have internal predecessors, (96), 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 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2021-11-21 00:20:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:25,131 INFO L93 Difference]: Finished difference Result 133 states and 205 transitions. [2021-11-21 00:20:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:25,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) Word has length 28 [2021-11-21 00:20:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:25,153 INFO L225 Difference]: With dead ends: 133 [2021-11-21 00:20:25,153 INFO L226 Difference]: Without dead ends: 89 [2021-11-21 00:20:25,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:25,163 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 67 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:25,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 182 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:20:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-21 00:20:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-11-21 00:20:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 86 states have internal predecessors, (120), 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) [2021-11-21 00:20:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2021-11-21 00:20:25,223 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 28 [2021-11-21 00:20:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:25,224 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2021-11-21 00:20:25,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2021-11-21 00:20:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2021-11-21 00:20:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:20:25,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:25,226 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] [2021-11-21 00:20:25,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:20:25,227 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:25,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:25,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1349947809, now seen corresponding path program 1 times [2021-11-21 00:20:25,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:25,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334963158] [2021-11-21 00:20:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:25,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:25,346 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 00:20:25,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:25,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334963158] [2021-11-21 00:20:25,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334963158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:25,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:25,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:25,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447568169] [2021-11-21 00:20:25,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:25,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:25,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:25,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:25,351 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-11-21 00:20:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:25,455 INFO L93 Difference]: Finished difference Result 201 states and 288 transitions. [2021-11-21 00:20:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:25,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 30 [2021-11-21 00:20:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:25,461 INFO L225 Difference]: With dead ends: 201 [2021-11-21 00:20:25,461 INFO L226 Difference]: Without dead ends: 133 [2021-11-21 00:20:25,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:25,464 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 49 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:25,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:20:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-21 00:20:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2021-11-21 00:20:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4153846153846155) internal successors, (184), 130 states have internal predecessors, (184), 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) [2021-11-21 00:20:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 184 transitions. [2021-11-21 00:20:25,492 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 184 transitions. Word has length 30 [2021-11-21 00:20:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:25,493 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 184 transitions. [2021-11-21 00:20:25,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-11-21 00:20:25,493 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 184 transitions. [2021-11-21 00:20:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 00:20:25,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:25,495 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] [2021-11-21 00:20:25,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:20:25,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash 726546740, now seen corresponding path program 1 times [2021-11-21 00:20:25,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:25,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914037407] [2021-11-21 00:20:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:25,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:25,565 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 00:20:25,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:25,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914037407] [2021-11-21 00:20:25,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914037407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:25,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:25,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:25,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902938670] [2021-11-21 00:20:25,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:25,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:25,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:25,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:25,569 INFO L87 Difference]: Start difference. First operand 131 states and 184 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2021-11-21 00:20:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:25,625 INFO L93 Difference]: Finished difference Result 311 states and 446 transitions. [2021-11-21 00:20:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:25,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 33 [2021-11-21 00:20:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:25,630 INFO L225 Difference]: With dead ends: 311 [2021-11-21 00:20:25,630 INFO L226 Difference]: Without dead ends: 199 [2021-11-21 00:20:25,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:25,634 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 44 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:25,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 119 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:20:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-21 00:20:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2021-11-21 00:20:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.4081632653061225) internal successors, (276), 196 states have internal predecessors, (276), 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) [2021-11-21 00:20:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 276 transitions. [2021-11-21 00:20:25,705 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 276 transitions. Word has length 33 [2021-11-21 00:20:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:25,706 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 276 transitions. [2021-11-21 00:20:25,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2021-11-21 00:20:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 276 transitions. [2021-11-21 00:20:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:20:25,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:25,709 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] [2021-11-21 00:20:25,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:20:25,709 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:25,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:25,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1106358226, now seen corresponding path program 1 times [2021-11-21 00:20:25,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:25,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446080909] [2021-11-21 00:20:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:25,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:25,914 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 00:20:25,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:25,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446080909] [2021-11-21 00:20:25,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446080909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:25,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:25,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:20:25,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976779141] [2021-11-21 00:20:25,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:25,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:20:25,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:25,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:20:25,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:20:25,919 INFO L87 Difference]: Start difference. First operand 197 states and 276 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-11-21 00:20:26,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:26,035 INFO L93 Difference]: Finished difference Result 643 states and 911 transitions. [2021-11-21 00:20:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:20:26,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 36 [2021-11-21 00:20:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:26,040 INFO L225 Difference]: With dead ends: 643 [2021-11-21 00:20:26,041 INFO L226 Difference]: Without dead ends: 465 [2021-11-21 00:20:26,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:20:26,045 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 126 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:26,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 218 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:20:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-21 00:20:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 461. [2021-11-21 00:20:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4086956521739131) internal successors, (648), 460 states have internal predecessors, (648), 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) [2021-11-21 00:20:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 648 transitions. [2021-11-21 00:20:26,114 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 648 transitions. Word has length 36 [2021-11-21 00:20:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:26,114 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 648 transitions. [2021-11-21 00:20:26,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-11-21 00:20:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 648 transitions. [2021-11-21 00:20:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 00:20:26,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:26,124 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] [2021-11-21 00:20:26,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:20:26,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash -91860297, now seen corresponding path program 1 times [2021-11-21 00:20:26,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:26,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305419093] [2021-11-21 00:20:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:26,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:26,238 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 00:20:26,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:26,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305419093] [2021-11-21 00:20:26,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305419093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:26,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:26,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:20:26,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316858590] [2021-11-21 00:20:26,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:26,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:20:26,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:26,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:20:26,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:20:26,242 INFO L87 Difference]: Start difference. First operand 461 states and 648 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-21 00:20:26,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:26,504 INFO L93 Difference]: Finished difference Result 1186 states and 1688 transitions. [2021-11-21 00:20:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:20:26,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 38 [2021-11-21 00:20:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:26,512 INFO L225 Difference]: With dead ends: 1186 [2021-11-21 00:20:26,512 INFO L226 Difference]: Without dead ends: 744 [2021-11-21 00:20:26,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:20:26,522 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 284 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:26,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 82 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:20:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-11-21 00:20:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 742. [2021-11-21 00:20:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 1.4062078272604588) internal successors, (1042), 741 states have internal predecessors, (1042), 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) [2021-11-21 00:20:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1042 transitions. [2021-11-21 00:20:26,646 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1042 transitions. Word has length 38 [2021-11-21 00:20:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:26,647 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1042 transitions. [2021-11-21 00:20:26,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-21 00:20:26,648 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1042 transitions. [2021-11-21 00:20:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 00:20:26,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:26,659 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] [2021-11-21 00:20:26,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:20:26,659 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:26,661 INFO L85 PathProgramCache]: Analyzing trace with hash -279226660, now seen corresponding path program 1 times [2021-11-21 00:20:26,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:26,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842278007] [2021-11-21 00:20:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:26,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:26,893 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 00:20:26,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:26,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842278007] [2021-11-21 00:20:26,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842278007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:26,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:26,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 00:20:26,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434160870] [2021-11-21 00:20:26,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:26,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:20:26,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:20:26,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:20:26,898 INFO L87 Difference]: Start difference. First operand 742 states and 1042 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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) [2021-11-21 00:20:27,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:27,328 INFO L93 Difference]: Finished difference Result 1571 states and 2228 transitions. [2021-11-21 00:20:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:20:27,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2021-11-21 00:20:27,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:27,343 INFO L225 Difference]: With dead ends: 1571 [2021-11-21 00:20:27,343 INFO L226 Difference]: Without dead ends: 1569 [2021-11-21 00:20:27,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:20:27,353 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 463 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:27,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 597 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:20:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-11-21 00:20:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 853. [2021-11-21 00:20:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.4049295774647887) internal successors, (1197), 852 states have internal predecessors, (1197), 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) [2021-11-21 00:20:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1197 transitions. [2021-11-21 00:20:27,483 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1197 transitions. Word has length 38 [2021-11-21 00:20:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:27,484 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1197 transitions. [2021-11-21 00:20:27,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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) [2021-11-21 00:20:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1197 transitions. [2021-11-21 00:20:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 00:20:27,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:27,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:27,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:20:27,487 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:27,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1957048105, now seen corresponding path program 1 times [2021-11-21 00:20:27,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:27,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711185731] [2021-11-21 00:20:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:27,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:28,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711185731] [2021-11-21 00:20:28,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711185731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:20:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673910675] [2021-11-21 00:20:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:28,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:28,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:28,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:28,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:20:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:28,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-21 00:20:28,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:29,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:34,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673910675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:34,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61064863] [2021-11-21 00:20:34,800 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2021-11-21 00:20:34,800 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:20:34,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:20:34,816 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:20:34,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:20:35,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:35,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 00:20:35,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:35,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:35,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 00:24:32,558 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:24:47,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [61064863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:47,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:24:47,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [14, 15, 13] total 73 [2021-11-21 00:24:47,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233976919] [2021-11-21 00:24:47,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:47,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 00:24:47,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 00:24:47,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=4316, Unknown=0, NotChecked=0, Total=5256 [2021-11-21 00:24:47,512 INFO L87 Difference]: Start difference. First operand 853 states and 1197 transitions. Second operand has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 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) [2021-11-21 00:24:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:56,087 INFO L93 Difference]: Finished difference Result 2014 states and 2848 transitions. [2021-11-21 00:24:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-21 00:24:56,088 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 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 46 [2021-11-21 00:24:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:56,099 INFO L225 Difference]: With dead ends: 2014 [2021-11-21 00:24:56,099 INFO L226 Difference]: Without dead ends: 1192 [2021-11-21 00:24:56,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2878 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=1124, Invalid=5518, Unknown=0, NotChecked=0, Total=6642 [2021-11-21 00:24:56,105 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 120 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:56,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 202 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 00:24:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-11-21 00:24:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1131. [2021-11-21 00:24:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 1.3663716814159292) internal successors, (1544), 1130 states have internal predecessors, (1544), 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) [2021-11-21 00:24:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1544 transitions. [2021-11-21 00:24:56,337 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1544 transitions. Word has length 46 [2021-11-21 00:24:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:56,338 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1544 transitions. [2021-11-21 00:24:56,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 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) [2021-11-21 00:24:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1544 transitions. [2021-11-21 00:24:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 00:24:56,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:56,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:56,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:24:56,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:24:56,559 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:56,560 INFO L85 PathProgramCache]: Analyzing trace with hash 637167090, now seen corresponding path program 1 times [2021-11-21 00:24:56,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:56,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152381456] [2021-11-21 00:24:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:56,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:24:56,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:56,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152381456] [2021-11-21 00:24:56,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152381456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:56,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:24:56,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:24:56,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905723065] [2021-11-21 00:24:56,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:56,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:24:56,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:56,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:24:56,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:24:56,651 INFO L87 Difference]: Start difference. First operand 1131 states and 1544 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2021-11-21 00:24:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:57,012 INFO L93 Difference]: Finished difference Result 2375 states and 3323 transitions. [2021-11-21 00:24:57,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:24:57,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 46 [2021-11-21 00:24:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:57,024 INFO L225 Difference]: With dead ends: 2375 [2021-11-21 00:24:57,024 INFO L226 Difference]: Without dead ends: 1579 [2021-11-21 00:24:57,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:24:57,027 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 265 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:57,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 92 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:24:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-11-21 00:24:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1577. [2021-11-21 00:24:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 1.3730964467005076) internal successors, (2164), 1576 states have internal predecessors, (2164), 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) [2021-11-21 00:24:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2164 transitions. [2021-11-21 00:24:57,279 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2164 transitions. Word has length 46 [2021-11-21 00:24:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:57,279 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 2164 transitions. [2021-11-21 00:24:57,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2021-11-21 00:24:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2164 transitions. [2021-11-21 00:24:57,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 00:24:57,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:57,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:57,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:24:57,282 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:57,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2031635539, now seen corresponding path program 1 times [2021-11-21 00:24:57,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:57,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460364196] [2021-11-21 00:24:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:57,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:24:57,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460364196] [2021-11-21 00:24:57,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460364196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:24:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372028269] [2021-11-21 00:24:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:57,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:57,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:57,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:24:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-21 00:24:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:24:58,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:25:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:03,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372028269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:25:03,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044258047] [2021-11-21 00:25:03,380 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2021-11-21 00:25:03,381 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:25:03,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:25:03,382 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:25:03,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:25:03,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:03,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:03,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:03,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 00:25:03,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:03,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:03,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 00:28:23,547 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:28:35,610 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:28:35,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:28:35,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 38 [2021-11-21 00:28:35,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537383884] [2021-11-21 00:28:35,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:28:35,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 00:28:35,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:28:35,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 00:28:35,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=4547, Unknown=0, NotChecked=0, Total=5256 [2021-11-21 00:28:35,615 INFO L87 Difference]: Start difference. First operand 1577 states and 2164 transitions. Second operand has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 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) [2021-11-21 00:29:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:29:00,245 INFO L93 Difference]: Finished difference Result 18624 states and 25872 transitions. [2021-11-21 00:29:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-11-21 00:29:00,248 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 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 46 [2021-11-21 00:29:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:29:00,362 INFO L225 Difference]: With dead ends: 18624 [2021-11-21 00:29:00,362 INFO L226 Difference]: Without dead ends: 17412 [2021-11-21 00:29:00,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15618 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=6224, Invalid=32782, Unknown=0, NotChecked=0, Total=39006 [2021-11-21 00:29:00,386 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 6511 mSDsluCounter, 2578 mSDsCounter, 0 mSdLazyCounter, 3243 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6511 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 3730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 3243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:29:00,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6511 Valid, 2720 Invalid, 3730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 3243 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-21 00:29:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17412 states. [2021-11-21 00:29:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17412 to 13052. [2021-11-21 00:29:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13051 states have (on average 1.3680177764156003) internal successors, (17854), 13051 states have internal predecessors, (17854), 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) [2021-11-21 00:29:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 17854 transitions. [2021-11-21 00:29:03,375 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 17854 transitions. Word has length 46 [2021-11-21 00:29:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:29:03,375 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 17854 transitions. [2021-11-21 00:29:03,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 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) [2021-11-21 00:29:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 17854 transitions. [2021-11-21 00:29:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:29:03,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:29:03,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:29:03,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 00:29:03,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:29:03,591 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:29:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:29:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1766888714, now seen corresponding path program 1 times [2021-11-21 00:29:03,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:29:03,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297588951] [2021-11-21 00:29:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:29:03,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:29:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:29:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:29:04,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:29:04,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297588951] [2021-11-21 00:29:04,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297588951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:29:04,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554041373] [2021-11-21 00:29:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:29:04,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:29:04,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:29:04,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:29:04,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df54f66-b362-4f55-920a-64191497fbc0/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:29:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:29:04,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-21 00:29:04,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:29:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:29:05,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:29:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:29:09,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554041373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:29:09,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464312398] [2021-11-21 00:29:09,519 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2021-11-21 00:29:09,519 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:29:09,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:29:09,520 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:29:09,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:29:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:29:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:29:09,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:29:09,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 00:29:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:29:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:29:09,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16