./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW --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 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:15:41,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:15:41,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:15:41,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:15:41,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:15:41,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:15:41,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:15:41,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:15:41,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:15:41,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:15:41,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:15:41,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:15:41,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:15:41,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:15:41,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:15:41,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:15:41,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:15:41,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:15:41,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:15:41,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:15:41,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:15:41,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:15:41,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:15:41,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:15:41,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:15:41,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:15:41,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:15:41,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:15:41,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:15:41,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:15:41,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:15:41,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:15:41,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:15:41,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:15:41,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:15:41,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:15:41,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:15:41,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:15:41,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:15:41,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:15:41,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:15:41,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:15:41,599 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:15:41,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:15:41,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:15:41,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:15:41,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:15:41,601 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:15:41,602 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:15:41,602 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:15:41,602 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:15:41,602 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:15:41,603 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:15:41,603 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:15:41,603 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:15:41,603 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:15:41,604 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:15:41,604 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:15:41,604 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:15:41,604 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:15:41,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:15:41,606 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:15:41,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:15:41,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:15:41,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:15:41,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:15:41,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:15:41,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:15:41,607 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:15:41,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:15:41,608 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:15:41,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:15:41,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:15:41,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:15:41,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:15:41,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:15:41,610 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:15:41,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:15:41,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:15:41,610 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:15:41,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:15:41,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:15:41,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:15:41,611 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d [2022-11-23 15:15:41,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:15:41,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:15:41,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:15:41,890 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:15:41,891 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:15:41,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2022-11-23 15:15:45,032 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:15:45,376 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:15:45,377 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2022-11-23 15:15:45,408 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/data/9331ec75f/1e2fc787db774ff59dedeff8e1493620/FLAGf62537180 [2022-11-23 15:15:45,425 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/data/9331ec75f/1e2fc787db774ff59dedeff8e1493620 [2022-11-23 15:15:45,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:15:45,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:15:45,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:15:45,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:15:45,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:15:45,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:15:45" (1/1) ... [2022-11-23 15:15:45,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f862f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:45, skipping insertion in model container [2022-11-23 15:15:45,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:15:45" (1/1) ... [2022-11-23 15:15:45,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:15:45,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:15:46,037 WARN L237 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_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2022-11-23 15:15:46,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:15:46,103 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:15:46,240 WARN L237 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_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2022-11-23 15:15:46,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:15:46,328 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:15:46,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46 WrapperNode [2022-11-23 15:15:46,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:15:46,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:15:46,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:15:46,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:15:46,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,495 INFO L138 Inliner]: procedures = 94, calls = 341, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1108 [2022-11-23 15:15:46,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:15:46,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:15:46,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:15:46,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:15:46,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,598 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:15:46,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:15:46,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:15:46,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:15:46,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (1/1) ... [2022-11-23 15:15:46,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:15:46,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:46,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:15:46,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:15:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-23 15:15:46,722 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-23 15:15:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:15:46,723 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 15:15:46,723 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 15:15:46,723 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 15:15:46,723 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 15:15:46,723 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-23 15:15:46,723 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-23 15:15:46,724 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:15:46,724 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:15:46,724 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-23 15:15:46,724 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-23 15:15:46,724 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:15:46,725 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:15:46,725 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:15:46,725 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:15:46,725 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:15:46,725 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:15:46,726 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:15:46,726 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:15:46,726 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-23 15:15:46,726 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-23 15:15:46,726 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:15:46,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:15:46,727 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:15:46,727 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:15:46,727 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:15:46,727 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:15:46,728 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:15:46,728 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:15:46,728 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 15:15:46,728 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 15:15:46,728 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:15:46,729 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:15:46,729 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:15:46,729 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:15:46,729 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:15:46,729 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:15:46,730 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:15:46,730 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:15:46,730 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:15:46,730 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:15:46,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:15:46,731 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:15:46,731 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:15:46,731 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:15:46,731 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:15:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:15:46,734 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:15:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:15:46,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:15:46,735 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:15:46,735 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:15:46,933 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:15:46,935 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:15:48,217 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:15:49,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:15:49,074 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:15:49,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:15:49 BoogieIcfgContainer [2022-11-23 15:15:49,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:15:49,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:15:49,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:15:49,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:15:49,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:15:45" (1/3) ... [2022-11-23 15:15:49,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea22acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:15:49, skipping insertion in model container [2022-11-23 15:15:49,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:46" (2/3) ... [2022-11-23 15:15:49,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea22acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:15:49, skipping insertion in model container [2022-11-23 15:15:49,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:15:49" (3/3) ... [2022-11-23 15:15:49,095 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product19.cil.c [2022-11-23 15:15:49,116 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:15:49,116 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:15:49,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:15:49,211 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4fa44123, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:15:49,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:15:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 255 states have (on average 1.588235294117647) internal successors, (405), 276 states have internal predecessors, (405), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-23 15:15:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 15:15:49,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:49,258 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:15:49,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:15:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash -98102543, now seen corresponding path program 1 times [2022-11-23 15:15:49,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:49,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730581712] [2022-11-23 15:15:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:49,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:15:49,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:49,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730581712] [2022-11-23 15:15:49,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730581712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:49,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:49,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:15:49,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763230712] [2022-11-23 15:15:49,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:49,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:15:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:15:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:15:49,892 INFO L87 Difference]: Start difference. First operand has 381 states, 255 states have (on average 1.588235294117647) internal successors, (405), 276 states have internal predecessors, (405), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-23 15:15:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:50,037 INFO L93 Difference]: Finished difference Result 399 states and 630 transitions. [2022-11-23 15:15:50,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:15:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2022-11-23 15:15:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:50,056 INFO L225 Difference]: With dead ends: 399 [2022-11-23 15:15:50,056 INFO L226 Difference]: Without dead ends: 377 [2022-11-23 15:15:50,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:15:50,063 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:50,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 560 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:15:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-23 15:15:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-11-23 15:15:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 253 states have (on average 1.5770750988142292) internal successors, (399), 272 states have internal predecessors, (399), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-23 15:15:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 592 transitions. [2022-11-23 15:15:50,180 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 592 transitions. Word has length 88 [2022-11-23 15:15:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:50,183 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 592 transitions. [2022-11-23 15:15:50,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-23 15:15:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 592 transitions. [2022-11-23 15:15:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 15:15:50,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:50,198 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:15:50,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:15:50,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:15:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2091135567, now seen corresponding path program 1 times [2022-11-23 15:15:50,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:50,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599220671] [2022-11-23 15:15:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:50,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:15:50,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:50,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599220671] [2022-11-23 15:15:50,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599220671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:50,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:50,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:15:50,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660521713] [2022-11-23 15:15:50,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:50,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:15:50,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:50,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:15:50,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:15:50,948 INFO L87 Difference]: Start difference. First operand 377 states and 592 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 15:15:53,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:53,797 INFO L93 Difference]: Finished difference Result 1148 states and 1837 transitions. [2022-11-23 15:15:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:15:53,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-23 15:15:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:53,806 INFO L225 Difference]: With dead ends: 1148 [2022-11-23 15:15:53,806 INFO L226 Difference]: Without dead ends: 794 [2022-11-23 15:15:53,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:15:53,811 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1153 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:53,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 1608 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 15:15:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-11-23 15:15:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 745. [2022-11-23 15:15:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 510 states have (on average 1.592156862745098) internal successors, (812), 543 states have internal predecessors, (812), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2022-11-23 15:15:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1191 transitions. [2022-11-23 15:15:53,899 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1191 transitions. Word has length 89 [2022-11-23 15:15:53,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:53,900 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1191 transitions. [2022-11-23 15:15:53,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 15:15:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1191 transitions. [2022-11-23 15:15:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-23 15:15:53,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:53,904 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:15:53,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:15:53,904 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:15:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1892573109, now seen corresponding path program 1 times [2022-11-23 15:15:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:53,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138939657] [2022-11-23 15:15:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:53,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:15:54,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:54,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138939657] [2022-11-23 15:15:54,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138939657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:54,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:54,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:15:54,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463127682] [2022-11-23 15:15:54,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:54,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:15:54,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:54,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:15:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:15:54,368 INFO L87 Difference]: Start difference. First operand 745 states and 1191 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:15:55,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:55,143 INFO L93 Difference]: Finished difference Result 816 states and 1303 transitions. [2022-11-23 15:15:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:15:55,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2022-11-23 15:15:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:55,152 INFO L225 Difference]: With dead ends: 816 [2022-11-23 15:15:55,152 INFO L226 Difference]: Without dead ends: 801 [2022-11-23 15:15:55,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:15:55,155 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 685 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:55,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1832 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:15:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-11-23 15:15:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 749. [2022-11-23 15:15:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 514 states have (on average 1.5875486381322956) internal successors, (816), 547 states have internal predecessors, (816), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2022-11-23 15:15:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1195 transitions. [2022-11-23 15:15:55,239 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1195 transitions. Word has length 93 [2022-11-23 15:15:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:55,240 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1195 transitions. [2022-11-23 15:15:55,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:15:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1195 transitions. [2022-11-23 15:15:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 15:15:55,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:55,248 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:15:55,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:15:55,249 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:15:55,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:55,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1844224197, now seen corresponding path program 1 times [2022-11-23 15:15:55,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:55,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211418951] [2022-11-23 15:15:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:55,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:15:55,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211418951] [2022-11-23 15:15:55,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211418951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:55,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:55,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:15:55,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301672867] [2022-11-23 15:15:55,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:55,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:15:55,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:55,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:15:55,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:15:55,623 INFO L87 Difference]: Start difference. First operand 749 states and 1195 transitions. Second operand has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-23 15:15:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:55,832 INFO L93 Difference]: Finished difference Result 768 states and 1219 transitions. [2022-11-23 15:15:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:15:55,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 98 [2022-11-23 15:15:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:55,844 INFO L225 Difference]: With dead ends: 768 [2022-11-23 15:15:55,846 INFO L226 Difference]: Without dead ends: 753 [2022-11-23 15:15:55,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:15:55,854 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 30 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:55,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2198 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:15:55,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-11-23 15:15:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 749. [2022-11-23 15:15:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 514 states have (on average 1.583657587548638) internal successors, (814), 547 states have internal predecessors, (814), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2022-11-23 15:15:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1193 transitions. [2022-11-23 15:15:55,930 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1193 transitions. Word has length 98 [2022-11-23 15:15:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:55,931 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1193 transitions. [2022-11-23 15:15:55,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-23 15:15:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1193 transitions. [2022-11-23 15:15:55,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-23 15:15:55,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:55,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:15:55,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:15:55,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:15:55,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:55,935 INFO L85 PathProgramCache]: Analyzing trace with hash -296829178, now seen corresponding path program 1 times [2022-11-23 15:15:55,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:55,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440497011] [2022-11-23 15:15:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:55,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:16:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:16:02,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:16:02,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440497011] [2022-11-23 15:16:02,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440497011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:16:02,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679394280] [2022-11-23 15:16:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:16:02,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:16:02,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:16:02,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:16:02,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:16:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:16:03,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:16:03,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:16:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 15:16:03,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:16:03,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679394280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:16:03,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:16:03,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [31] total 33 [2022-11-23 15:16:03,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465738641] [2022-11-23 15:16:03,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:16:03,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:16:03,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:16:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:16:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 15:16:03,220 INFO L87 Difference]: Start difference. First operand 749 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-23 15:16:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:16:03,501 INFO L93 Difference]: Finished difference Result 832 states and 1317 transitions. [2022-11-23 15:16:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:16:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 105 [2022-11-23 15:16:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:16:03,508 INFO L225 Difference]: With dead ends: 832 [2022-11-23 15:16:03,509 INFO L226 Difference]: Without dead ends: 817 [2022-11-23 15:16:03,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 15:16:03,512 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 44 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:16:03,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1729 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:16:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-23 15:16:03,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 753. [2022-11-23 15:16:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 518 states have (on average 1.579150579150579) internal successors, (818), 551 states have internal predecessors, (818), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2022-11-23 15:16:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1197 transitions. [2022-11-23 15:16:03,571 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1197 transitions. Word has length 105 [2022-11-23 15:16:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:16:03,572 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 1197 transitions. [2022-11-23 15:16:03,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-23 15:16:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1197 transitions. [2022-11-23 15:16:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 15:16:03,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:16:03,576 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:16:03,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:16:03,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:16:03,786 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:16:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:16:03,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1587849353, now seen corresponding path program 1 times [2022-11-23 15:16:03,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:16:03,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236937911] [2022-11-23 15:16:03,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:16:03,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:16:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:16:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-23 15:16:05,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:16:05,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236937911] [2022-11-23 15:16:05,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236937911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:16:05,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911236674] [2022-11-23 15:16:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:16:05,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:16:05,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:16:05,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:16:05,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:16:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:16:06,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1916 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-23 15:16:06,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:16:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:16:07,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:16:59,224 WARN L233 SmtUtils]: Spent 49.72s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 15:17:49,121 WARN L233 SmtUtils]: Spent 49.20s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 15:17:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-23 15:17:49,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911236674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:17:49,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193558019] [2022-11-23 15:17:49,825 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2022-11-23 15:17:49,826 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:17:49,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:17:49,835 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:17:49,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:17:58,081 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 435 for LOIs [2022-11-23 15:17:58,156 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 586 for LOIs [2022-11-23 15:18:01,538 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 586 for LOIs [2022-11-23 15:18:13,735 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 447 for LOIs [2022-11-23 15:18:16,016 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 501 for LOIs [2022-11-23 15:18:18,173 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2022-11-23 15:18:18,187 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 109 for LOIs [2022-11-23 15:18:18,201 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 593 for LOIs [2022-11-23 15:18:22,034 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 31 for LOIs [2022-11-23 15:18:22,037 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 455 for LOIs [2022-11-23 15:18:23,009 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 449 for LOIs [2022-11-23 15:18:23,117 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 556 for LOIs [2022-11-23 15:18:25,882 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 833 for LOIs [2022-11-23 15:18:34,545 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 660 for LOIs [2022-11-23 15:18:35,262 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:18:56,739 WARN L233 SmtUtils]: Spent 10.87s on a formula simplification. DAG size of input: 660 DAG size of output: 521 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:19:08,444 WARN L233 SmtUtils]: Spent 11.19s on a formula simplification. DAG size of input: 700 DAG size of output: 535 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:19:16,782 WARN L233 SmtUtils]: Spent 7.88s on a formula simplification. DAG size of input: 675 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:19:25,095 WARN L233 SmtUtils]: Spent 7.86s on a formula simplification. DAG size of input: 675 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:19:46,044 WARN L233 SmtUtils]: Spent 20.20s on a formula simplification. DAG size of input: 833 DAG size of output: 684 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:20:05,183 WARN L233 SmtUtils]: Spent 18.22s on a formula simplification. DAG size of input: 901 DAG size of output: 809 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:20:42,807 WARN L233 SmtUtils]: Spent 9.58s on a formula simplification. DAG size of input: 501 DAG size of output: 442 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:20:50,491 WARN L233 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 628 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:20:56,987 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 628 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:03,581 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 630 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:11,316 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 634 DAG size of output: 607 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:18,065 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 634 DAG size of output: 607 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:24,919 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 640 DAG size of output: 611 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:31,900 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 645 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:38,785 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 641 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:22:15,203 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 653 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:22:22,451 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 653 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:23:30,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11884#(and (= 30 (select |#length| 34)) (= (select (select |#memory_int| 23) 0) 32) (= 6 (select |#length| 18)) (= 116 (select (select |#memory_int| 7) 2)) (= (select |#valid| 30) 1) (= (select (select |#memory_int| 20) 1) 37) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (= (select |#length| 21) 4) (= (select (select |#memory_int| 21) 1) 37) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 23) 1) 37) (= (select (select |#memory_int| 20) 3) 0) (= (select (select |#memory_int| 22) 3) 0) (= (select (select |#memory_int| 5) 3) 0) (= 4 (select |#length| 16)) (= 3 (select |#length| 10)) (= ~floorButtons_3~0 0) (= (select (select |#memory_int| 22) 0) 32) (= (select (select |#memory_int| 13) 3) 0) (= (select |#valid| 26) 1) (= (select |#length| 4) 10) (<= ~currentHeading~0 1) (= (select |#length| 8) 3) (= (select |#length| 6) 4) (= (select (select |#memory_int| 13) 1) 37) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= 30 (select |#length| 25)) (= (select (select |#memory_int| 18) 5) 0) (= (select (select |#memory_int| 20) 0) 32) (= (select (select |#memory_int| 6) 0) 91) (= (select |#valid| 11) 1) (= (select |#length| 9) 10) (= (select |#valid| 27) 1) (= (select (select |#memory_int| 8) 0) 37) (= (select |#valid| 33) 1) (= 73 (select (select |#memory_int| 12) 1)) (= (select (select |#memory_int| 22) 1) 37) (<= ~currentFloorID~0 2147483647) (= (select (select |#memory_int| 23) 2) 105) (= (select (select |#memory_int| 10) 0) 117) (= ~calls_3~0 0) (= (select (select |#memory_int| 19) 2) 105) (= (select |#length| 15) 4) (= ~calls_0~0 0) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 19) 1) 37) (= ~head~0.offset 0) (= 7 (select |#length| 12)) (= (select (select |#memory_int| 22) 2) 105) (= 2 (select |#length| 1)) (= (select (select |#memory_int| 16) 2) 105) (= (select (select |#memory_int| 17) 2) 105) (= (select |#length| 19) 4) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= ~floorButtons_4~0 0) (= (select (select |#memory_int| 18) 4) 58) (= (select |#length| 35) 9) (= (select |#valid| 18) 1) (= ~calls_1~0 0) (= 91 (select (select |#memory_int| 5) 0)) (= (select |#valid| 22) 1) (= 70 (select (select |#memory_int| 18) 1)) (= 5 (select |#length| 7)) (= (select |#valid| 24) 1) (= (select (select |#memory_int| 19) 3) 0) (= 32 (select (select |#memory_int| 7) 0)) (not (= ~landingButtons_spc1_0~0 0)) (= (select (select |#memory_int| 17) 3) 0) (= (select (select |#memory_int| 5) 1) 95) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= ~floorButtons_2~0 0) (= (select |#valid| 28) 1) (= (select |#length| 17) 4) (= (select (select |#memory_int| 13) 2) 105) (= 112 (select (select |#memory_int| 12) 4)) (= (select |#valid| 4) 1) (= (select (select |#memory_int| 16) 1) 37) (= (select |#length| 32) 9) (= (select (select |#memory_int| 20) 2) 105) (= 112 (select (select |#memory_int| 10) 1)) (= (select (select |#memory_int| 8) 2) 0) (= (select (select |#memory_int| 21) 2) 105) (= 0 (select (select |#memory_int| 7) 4)) (= (select |#length| 13) 4) (= 5 (select |#length| 11)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 36) 25) (= ~floorButtons_1~0 0) (= (select |#length| 24) 2) (= (select (select |#memory_int| 12) 6) 0) (= (select |#valid| 21) 1) (= (select (select |#memory_int| 11) 0) 100) (= (select (select |#memory_int| 24) 0) 10) (= ~floorButtons_0~0 0) (= 97 (select (select |#memory_int| 7) 1)) (= (select (select |#memory_int| 15) 1) 37) (= (select |#length| 33) 25) (= (select |#length| 5) 4) (= (select |#valid| 14) 1) (= 21 (select |#length| 30)) (= 112 (select (select |#memory_int| 18) 3)) (= (select |#length| 27) 21) (= 119 (select (select |#memory_int| 11) 2)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 12) 5) 58) (= (select (select |#memory_int| 16) 0) 32) (= (select |#valid| 25) 1) (= ~head~0.base 0) (= (select (select |#memory_int| 14) 3) 0) (= (select (select |#memory_int| 23) 3) 0) (= 95 (select (select |#memory_int| 12) 3)) (= 105 (select (select |#memory_int| 14) 2)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 14) 1) 37) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= (select (select |#memory_int| 10) 2) 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 11) 1) 111) (= (select |#valid| 23) 1) (= 9 (select |#length| 29)) (= 32 (select (select |#memory_int| 7) 3)) (= 4 (select |#length| 23)) (= (select (select |#memory_int| 24) 1) 0) (= (select |#length| 20) 4) (= (select (select |#memory_int| 21) 3) 0) (<= 0 ~currentHeading~0) (= 76 (select (select |#memory_int| 12) 2)) (= (select |#valid| 19) 1) (= (select (select |#memory_int| 15) 0) 32) (= 32 (select (select |#memory_int| 13) 0)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 6) 3) 0) (= (select |#valid| 16) 1) (= (select (select |#memory_int| 15) 2) 105) (= 32 (select (select |#memory_int| 17) 0)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 15) 3) 0) (= (select (select |#memory_int| 1) 1) 0) (= 30 (select |#length| 28)) (= (select (select |#memory_int| 5) 2) 93) (= (select (select |#memory_int| 14) 0) 32) (= ~calls_2~0 0) (= ~calls_4~0 0) (= 30 (select |#length| 31)) (= (select |#valid| 29) 1) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 6) 2) 32) (= 32 (select (select |#memory_int| 12) 0)) (= (select |#valid| 17) 1) (= (select (select |#memory_int| 16) 3) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select (select |#memory_int| 11) 4) 0) (= 32 (select (select |#memory_int| 19) 0)) (= (select (select |#memory_int| 18) 2) 95) (= 4 (select |#length| 14)) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select |#length| 22) 4) (= 9 (select |#length| 26)) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 18) 0)) (= (select (select |#memory_int| 8) 1) 105) (= (select (select |#memory_int| 11) 3) 110) (= 32 (select (select |#memory_int| 21) 0)))' at error location [2022-11-23 15:23:30,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:23:30,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:23:30,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 34 [2022-11-23 15:23:30,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994960081] [2022-11-23 15:23:30,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:23:30,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 15:23:30,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 15:23:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=12888, Unknown=0, NotChecked=0, Total=14042 [2022-11-23 15:23:30,951 INFO L87 Difference]: Start difference. First operand 753 states and 1197 transitions. Second operand has 34 states, 24 states have (on average 6.916666666666667) internal successors, (166), 28 states have internal predecessors, (166), 14 states have call successors, (56), 7 states have call predecessors, (56), 20 states have return successors, (58), 20 states have call predecessors, (58), 13 states have call successors, (58) [2022-11-23 15:24:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:01,547 INFO L93 Difference]: Finished difference Result 3926 states and 6333 transitions. [2022-11-23 15:24:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-23 15:24:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 24 states have (on average 6.916666666666667) internal successors, (166), 28 states have internal predecessors, (166), 14 states have call successors, (56), 7 states have call predecessors, (56), 20 states have return successors, (58), 20 states have call predecessors, (58), 13 states have call successors, (58) Word has length 128 [2022-11-23 15:24:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:01,580 INFO L225 Difference]: With dead ends: 3926 [2022-11-23 15:24:01,580 INFO L226 Difference]: Without dead ends: 3202 [2022-11-23 15:24:01,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 300 SyntacticMatches, 4 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14151 ImplicationChecksByTransitivity, 304.1s TimeCoverageRelationStatistics Valid=2876, Invalid=34566, Unknown=0, NotChecked=0, Total=37442 [2022-11-23 15:24:01,598 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 7115 mSDsluCounter, 9278 mSDsCounter, 0 mSdLazyCounter, 24922 mSolverCounterSat, 4329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7163 SdHoareTripleChecker+Valid, 9918 SdHoareTripleChecker+Invalid, 29251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 4329 IncrementalHoareTripleChecker+Valid, 24922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:01,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7163 Valid, 9918 Invalid, 29251 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [4329 Valid, 24922 Invalid, 0 Unknown, 0 Unchecked, 21.3s Time] [2022-11-23 15:24:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2022-11-23 15:24:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2668. [2022-11-23 15:24:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 1876 states have (on average 1.5852878464818763) internal successors, (2974), 1989 states have internal predecessors, (2974), 628 states have call successors, (628), 149 states have call predecessors, (628), 163 states have return successors, (673), 604 states have call predecessors, (673), 623 states have call successors, (673) [2022-11-23 15:24:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 4275 transitions. [2022-11-23 15:24:01,922 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 4275 transitions. Word has length 128 [2022-11-23 15:24:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:01,923 INFO L495 AbstractCegarLoop]: Abstraction has 2668 states and 4275 transitions. [2022-11-23 15:24:01,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 24 states have (on average 6.916666666666667) internal successors, (166), 28 states have internal predecessors, (166), 14 states have call successors, (56), 7 states have call predecessors, (56), 20 states have return successors, (58), 20 states have call predecessors, (58), 13 states have call successors, (58) [2022-11-23 15:24:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 4275 transitions. [2022-11-23 15:24:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-23 15:24:01,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:01,937 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:01,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:24:02,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:02,149 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:02,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2035475755, now seen corresponding path program 1 times [2022-11-23 15:24:02,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:02,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786538183] [2022-11-23 15:24:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:02,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-23 15:24:02,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:02,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786538183] [2022-11-23 15:24:02,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786538183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:24:02,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877468137] [2022-11-23 15:24:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:02,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:02,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:24:02,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:24:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:03,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 2241 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:24:03,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:24:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-23 15:24:03,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:24:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-23 15:24:04,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877468137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:24:04,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [532390471] [2022-11-23 15:24:04,359 INFO L159 IcfgInterpreter]: Started Sifa with 92 locations of interest [2022-11-23 15:24:04,360 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:24:04,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:24:04,361 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:24:04,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:24:13,367 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 412 for LOIs [2022-11-23 15:24:13,465 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 586 for LOIs [2022-11-23 15:24:32,428 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 695 for LOIs [2022-11-23 15:24:37,882 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 40 for LOIs [2022-11-23 15:24:38,016 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 27 for LOIs [2022-11-23 15:24:38,050 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 54 for LOIs [2022-11-23 15:24:38,067 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 53 for LOIs [2022-11-23 15:24:38,075 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 593 for LOIs [2022-11-23 15:24:42,285 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 27 for LOIs [2022-11-23 15:24:42,286 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 50 for LOIs [2022-11-23 15:24:42,368 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 46 for LOIs [2022-11-23 15:24:42,371 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 556 for LOIs [2022-11-23 15:24:45,361 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 833 for LOIs [2022-11-23 15:24:51,838 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 660 for LOIs [2022-11-23 15:24:52,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:25:14,158 WARN L233 SmtUtils]: Spent 11.88s on a formula simplification. DAG size of input: 660 DAG size of output: 521 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:25:26,670 WARN L233 SmtUtils]: Spent 12.23s on a formula simplification. DAG size of input: 700 DAG size of output: 535 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:25:35,607 WARN L233 SmtUtils]: Spent 8.68s on a formula simplification. DAG size of input: 675 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:25:44,990 WARN L233 SmtUtils]: Spent 9.11s on a formula simplification. DAG size of input: 675 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:26:07,935 WARN L233 SmtUtils]: Spent 22.54s on a formula simplification. DAG size of input: 833 DAG size of output: 684 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:26:18,604 WARN L233 SmtUtils]: Spent 10.25s on a formula simplification that was a NOOP. DAG size: 836 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:26:33,581 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 564 DAG size of output: 559 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:26:59,111 WARN L233 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 695 DAG size of output: 608 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:27:37,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22336#(and (= 30 (select |#length| 34)) (= (select (select |#memory_int| 23) 0) 32) (= 6 (select |#length| 18)) (= 116 (select (select |#memory_int| 7) 2)) (= (select |#valid| 30) 1) (= (select (select |#memory_int| 20) 1) 37) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (= (select |#length| 21) 4) (= (select (select |#memory_int| 21) 1) 37) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 23) 1) 37) (= (select (select |#memory_int| 20) 3) 0) (= (select (select |#memory_int| 22) 3) 0) (= (select (select |#memory_int| 5) 3) 0) (= 4 (select |#length| 16)) (= 3 (select |#length| 10)) (= (select (select |#memory_int| 22) 0) 32) (= (select (select |#memory_int| 13) 3) 0) (= (select |#valid| 26) 1) (= (select |#length| 4) 10) (= (select |#length| 8) 3) (= (select |#length| 6) 4) (= (select (select |#memory_int| 13) 1) 37) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= 30 (select |#length| 25)) (= (select (select |#memory_int| 18) 5) 0) (= (select (select |#memory_int| 20) 0) 32) (= (select (select |#memory_int| 6) 0) 91) (= (select |#valid| 11) 1) (= (select |#length| 9) 10) (= (select |#valid| 27) 1) (= (select (select |#memory_int| 8) 0) 37) (= (select |#valid| 33) 1) (= 73 (select (select |#memory_int| 12) 1)) (= (select (select |#memory_int| 22) 1) 37) (<= ~currentFloorID~0 2147483647) (= (select (select |#memory_int| 23) 2) 105) (= (select (select |#memory_int| 10) 0) 117) (= (select (select |#memory_int| 19) 2) 105) (= (select |#length| 15) 4) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 19) 1) 37) (= ~head~0.offset 0) (= 7 (select |#length| 12)) (= (select (select |#memory_int| 22) 2) 105) (= 2 (select |#length| 1)) (= (select (select |#memory_int| 16) 2) 105) (= (select (select |#memory_int| 17) 2) 105) (= (select |#length| 19) 4) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select (select |#memory_int| 18) 4) 58) (= (select |#length| 35) 9) (= (select |#valid| 18) 1) (= 91 (select (select |#memory_int| 5) 0)) (= (select |#valid| 22) 1) (= 70 (select (select |#memory_int| 18) 1)) (= 5 (select |#length| 7)) (= (select |#valid| 24) 1) (= (select (select |#memory_int| 19) 3) 0) (= 32 (select (select |#memory_int| 7) 0)) (not (= ~landingButtons_spc1_0~0 0)) (= (select (select |#memory_int| 17) 3) 0) (= (select (select |#memory_int| 5) 1) 95) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select |#valid| 28) 1) (= (select |#length| 17) 4) (= (select (select |#memory_int| 13) 2) 105) (= 112 (select (select |#memory_int| 12) 4)) (= (select |#valid| 4) 1) (= (select (select |#memory_int| 16) 1) 37) (= (select |#length| 32) 9) (= (select (select |#memory_int| 20) 2) 105) (= 112 (select (select |#memory_int| 10) 1)) (= (select (select |#memory_int| 8) 2) 0) (= (select (select |#memory_int| 21) 2) 105) (= 0 (select (select |#memory_int| 7) 4)) (= (select |#length| 13) 4) (= 5 (select |#length| 11)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 36) 25) (= (select |#length| 24) 2) (= (select (select |#memory_int| 12) 6) 0) (= (select |#valid| 21) 1) (= (select (select |#memory_int| 11) 0) 100) (= (select (select |#memory_int| 24) 0) 10) (= 97 (select (select |#memory_int| 7) 1)) (= (select (select |#memory_int| 15) 1) 37) (= (select |#length| 33) 25) (= (select |#length| 5) 4) (= (select |#valid| 14) 1) (= 21 (select |#length| 30)) (= 112 (select (select |#memory_int| 18) 3)) (= (select |#length| 27) 21) (= 119 (select (select |#memory_int| 11) 2)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 12) 5) 58) (= (select (select |#memory_int| 16) 0) 32) (= (select |#valid| 25) 1) (= ~head~0.base 0) (= (select (select |#memory_int| 14) 3) 0) (= (select (select |#memory_int| 23) 3) 0) (= 95 (select (select |#memory_int| 12) 3)) (= 105 (select (select |#memory_int| 14) 2)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 14) 1) 37) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= (select (select |#memory_int| 10) 2) 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 11) 1) 111) (= (select |#valid| 23) 1) (= 9 (select |#length| 29)) (= 32 (select (select |#memory_int| 7) 3)) (= 4 (select |#length| 23)) (= (select (select |#memory_int| 24) 1) 0) (= (select |#length| 20) 4) (= (select (select |#memory_int| 21) 3) 0) (= 76 (select (select |#memory_int| 12) 2)) (= (select |#valid| 19) 1) (= (select (select |#memory_int| 15) 0) 32) (= 32 (select (select |#memory_int| 13) 0)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 6) 3) 0) (= (select |#valid| 16) 1) (= (select (select |#memory_int| 15) 2) 105) (= 32 (select (select |#memory_int| 17) 0)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 15) 3) 0) (= (select (select |#memory_int| 1) 1) 0) (= 30 (select |#length| 28)) (= (select (select |#memory_int| 5) 2) 93) (= (select (select |#memory_int| 14) 0) 32) (= 30 (select |#length| 31)) (= (select |#valid| 29) 1) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 6) 2) 32) (= 32 (select (select |#memory_int| 12) 0)) (= (select |#valid| 17) 1) (= (select (select |#memory_int| 16) 3) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select (select |#memory_int| 11) 4) 0) (= 32 (select (select |#memory_int| 19) 0)) (= (select (select |#memory_int| 18) 2) 95) (= 4 (select |#length| 14)) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select |#length| 22) 4) (= 9 (select |#length| 26)) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 18) 0)) (= (select (select |#memory_int| 8) 1) 105) (= (select (select |#memory_int| 11) 3) 110) (= 32 (select (select |#memory_int| 21) 0)))' at error location [2022-11-23 15:27:37,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:27:37,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:27:37,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 7] total 16 [2022-11-23 15:27:37,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221923584] [2022-11-23 15:27:37,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:27:37,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 15:27:37,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 15:27:37,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=7239, Unknown=0, NotChecked=0, Total=8010 [2022-11-23 15:27:37,866 INFO L87 Difference]: Start difference. First operand 2668 states and 4275 transitions. Second operand has 16 states, 16 states have (on average 8.25) internal successors, (132), 16 states have internal predecessors, (132), 8 states have call successors, (47), 3 states have call predecessors, (47), 5 states have return successors, (46), 8 states have call predecessors, (46), 7 states have call successors, (46) [2022-11-23 15:27:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:40,698 INFO L93 Difference]: Finished difference Result 3353 states and 5418 transitions. [2022-11-23 15:27:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:27:40,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.25) internal successors, (132), 16 states have internal predecessors, (132), 8 states have call successors, (47), 3 states have call predecessors, (47), 5 states have return successors, (46), 8 states have call predecessors, (46), 7 states have call successors, (46) Word has length 162 [2022-11-23 15:27:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:40,734 INFO L225 Difference]: With dead ends: 3353 [2022-11-23 15:27:40,734 INFO L226 Difference]: Without dead ends: 3334 [2022-11-23 15:27:40,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 398 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3291 ImplicationChecksByTransitivity, 166.6s TimeCoverageRelationStatistics Valid=872, Invalid=8440, Unknown=0, NotChecked=0, Total=9312 [2022-11-23 15:27:40,743 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 1653 mSDsluCounter, 3249 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1657 SdHoareTripleChecker+Valid, 3797 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:40,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1657 Valid, 3797 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 15:27:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2022-11-23 15:27:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 3150. [2022-11-23 15:27:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 2242 states have (on average 1.5428189116859947) internal successors, (3459), 2353 states have internal predecessors, (3459), 744 states have call successors, (744), 149 states have call predecessors, (744), 163 states have return successors, (866), 722 states have call predecessors, (866), 739 states have call successors, (866) [2022-11-23 15:27:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 5069 transitions. [2022-11-23 15:27:41,129 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 5069 transitions. Word has length 162 [2022-11-23 15:27:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:41,130 INFO L495 AbstractCegarLoop]: Abstraction has 3150 states and 5069 transitions. [2022-11-23 15:27:41,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.25) internal successors, (132), 16 states have internal predecessors, (132), 8 states have call successors, (47), 3 states have call predecessors, (47), 5 states have return successors, (46), 8 states have call predecessors, (46), 7 states have call successors, (46) [2022-11-23 15:27:41,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 5069 transitions. [2022-11-23 15:27:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-23 15:27:41,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:41,141 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:41,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:27:41,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:27:41,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:41,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1563436116, now seen corresponding path program 1 times [2022-11-23 15:27:41,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:41,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321278711] [2022-11-23 15:27:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:41,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-23 15:27:41,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:41,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321278711] [2022-11-23 15:27:41,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321278711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:41,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:41,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:27:41,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360546339] [2022-11-23 15:27:41,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:41,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:27:41,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:41,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:27:41,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:27:41,605 INFO L87 Difference]: Start difference. First operand 3150 states and 5069 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:27:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:42,090 INFO L93 Difference]: Finished difference Result 5662 states and 9311 transitions. [2022-11-23 15:27:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:27:42,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 159 [2022-11-23 15:27:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:42,180 INFO L225 Difference]: With dead ends: 5662 [2022-11-23 15:27:42,180 INFO L226 Difference]: Without dead ends: 3518 [2022-11-23 15:27:42,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:27:42,198 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 98 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:42,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1743 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:27:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3518 states. [2022-11-23 15:27:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3518 to 3166. [2022-11-23 15:27:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3166 states, 2258 states have (on average 1.5389725420726306) internal successors, (3475), 2369 states have internal predecessors, (3475), 744 states have call successors, (744), 149 states have call predecessors, (744), 163 states have return successors, (866), 722 states have call predecessors, (866), 739 states have call successors, (866) [2022-11-23 15:27:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3166 states to 3166 states and 5085 transitions. [2022-11-23 15:27:42,539 INFO L78 Accepts]: Start accepts. Automaton has 3166 states and 5085 transitions. Word has length 159 [2022-11-23 15:27:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:42,539 INFO L495 AbstractCegarLoop]: Abstraction has 3166 states and 5085 transitions. [2022-11-23 15:27:42,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:27:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3166 states and 5085 transitions. [2022-11-23 15:27:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-23 15:27:42,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:42,553 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:42,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:27:42,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1409388186, now seen corresponding path program 1 times [2022-11-23 15:27:42,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:42,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122111132] [2022-11-23 15:27:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:42,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-23 15:27:42,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:42,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122111132] [2022-11-23 15:27:42,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122111132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:27:42,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934652851] [2022-11-23 15:27:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:42,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:42,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:42,756 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:27:42,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:27:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:43,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 2030 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:27:43,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-23 15:27:43,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:27:43,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934652851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:43,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:27:43,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:27:43,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445756839] [2022-11-23 15:27:43,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:43,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:27:43,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:43,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:27:43,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:27:43,281 INFO L87 Difference]: Start difference. First operand 3166 states and 5085 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:27:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:43,891 INFO L93 Difference]: Finished difference Result 5384 states and 8842 transitions. [2022-11-23 15:27:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:27:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 162 [2022-11-23 15:27:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:43,926 INFO L225 Difference]: With dead ends: 5384 [2022-11-23 15:27:43,926 INFO L226 Difference]: Without dead ends: 3400 [2022-11-23 15:27:43,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:27:43,947 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 213 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:43,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1446 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:27:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-11-23 15:27:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3400. [2022-11-23 15:27:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 2486 states have (on average 1.574014481094127) internal successors, (3913), 2597 states have internal predecessors, (3913), 744 states have call successors, (744), 155 states have call predecessors, (744), 169 states have return successors, (866), 722 states have call predecessors, (866), 739 states have call successors, (866) [2022-11-23 15:27:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 5523 transitions. [2022-11-23 15:27:44,321 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 5523 transitions. Word has length 162 [2022-11-23 15:27:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:44,324 INFO L495 AbstractCegarLoop]: Abstraction has 3400 states and 5523 transitions. [2022-11-23 15:27:44,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:27:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 5523 transitions. [2022-11-23 15:27:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-23 15:27:44,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:44,338 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:44,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:27:44,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:44,549 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:44,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1104769933, now seen corresponding path program 1 times [2022-11-23 15:27:44,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:44,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940687254] [2022-11-23 15:27:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:44,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-23 15:27:44,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:44,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940687254] [2022-11-23 15:27:44,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940687254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:27:44,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853159441] [2022-11-23 15:27:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:44,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:44,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:44,750 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:27:44,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:27:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:45,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 2035 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:27:45,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-23 15:27:45,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:27:45,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853159441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:45,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:27:45,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:27:45,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796793177] [2022-11-23 15:27:45,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:45,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:27:45,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:45,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:27:45,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:27:45,271 INFO L87 Difference]: Start difference. First operand 3400 states and 5523 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:27:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:45,904 INFO L93 Difference]: Finished difference Result 5763 states and 9541 transitions. [2022-11-23 15:27:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:27:45,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 167 [2022-11-23 15:27:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:45,933 INFO L225 Difference]: With dead ends: 5763 [2022-11-23 15:27:45,933 INFO L226 Difference]: Without dead ends: 3634 [2022-11-23 15:27:45,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:27:45,950 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 211 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:45,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1446 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:27:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2022-11-23 15:27:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 3634. [2022-11-23 15:27:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 2714 states have (on average 1.603168754605748) internal successors, (4351), 2825 states have internal predecessors, (4351), 744 states have call successors, (744), 161 states have call predecessors, (744), 175 states have return successors, (866), 722 states have call predecessors, (866), 739 states have call successors, (866) [2022-11-23 15:27:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5961 transitions. [2022-11-23 15:27:46,288 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5961 transitions. Word has length 167 [2022-11-23 15:27:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:46,289 INFO L495 AbstractCegarLoop]: Abstraction has 3634 states and 5961 transitions. [2022-11-23 15:27:46,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:27:46,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5961 transitions. [2022-11-23 15:27:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-23 15:27:46,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:46,300 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:46,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:27:46,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:46,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1818793469, now seen corresponding path program 1 times [2022-11-23 15:27:46,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:46,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126129383] [2022-11-23 15:27:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:46,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 15:27:46,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:46,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126129383] [2022-11-23 15:27:46,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126129383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:27:46,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757202197] [2022-11-23 15:27:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:46,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:46,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:46,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:27:46,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:27:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:47,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 2039 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:27:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-23 15:27:47,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:27:47,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757202197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:47,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:27:47,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:27:47,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497050503] [2022-11-23 15:27:47,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:47,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:27:47,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:47,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:27:47,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:27:47,182 INFO L87 Difference]: Start difference. First operand 3634 states and 5961 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:27:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:47,699 INFO L93 Difference]: Finished difference Result 6142 states and 10240 transitions. [2022-11-23 15:27:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:27:47,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 171 [2022-11-23 15:27:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:47,739 INFO L225 Difference]: With dead ends: 6142 [2022-11-23 15:27:47,739 INFO L226 Difference]: Without dead ends: 3868 [2022-11-23 15:27:47,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:27:47,756 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 209 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:47,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1446 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:27:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2022-11-23 15:27:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3868. [2022-11-23 15:27:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 2942 states have (on average 1.6278042148198504) internal successors, (4789), 3053 states have internal predecessors, (4789), 744 states have call successors, (744), 167 states have call predecessors, (744), 181 states have return successors, (866), 722 states have call predecessors, (866), 739 states have call successors, (866) [2022-11-23 15:27:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 6399 transitions. [2022-11-23 15:27:48,130 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 6399 transitions. Word has length 171 [2022-11-23 15:27:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:48,131 INFO L495 AbstractCegarLoop]: Abstraction has 3868 states and 6399 transitions. [2022-11-23 15:27:48,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:27:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 6399 transitions. [2022-11-23 15:27:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-23 15:27:48,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:48,145 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:48,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 15:27:48,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:48,355 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:48,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1844660666, now seen corresponding path program 1 times [2022-11-23 15:27:48,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:48,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897451332] [2022-11-23 15:27:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:48,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-23 15:27:48,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:48,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897451332] [2022-11-23 15:27:48,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897451332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:27:48,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733125753] [2022-11-23 15:27:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:48,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:48,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:48,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:27:48,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:27:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:49,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 2042 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:27:49,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-23 15:27:49,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:27:49,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733125753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:49,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:27:49,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:27:49,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029307224] [2022-11-23 15:27:49,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:49,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:27:49,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:27:49,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:27:49,044 INFO L87 Difference]: Start difference. First operand 3868 states and 6399 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:27:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:49,623 INFO L93 Difference]: Finished difference Result 6521 states and 10939 transitions. [2022-11-23 15:27:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:27:49,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 174 [2022-11-23 15:27:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:49,652 INFO L225 Difference]: With dead ends: 6521 [2022-11-23 15:27:49,652 INFO L226 Difference]: Without dead ends: 4102 [2022-11-23 15:27:49,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:27:49,669 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 207 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:49,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1446 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:27:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-11-23 15:27:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 4102. [2022-11-23 15:27:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4102 states, 3170 states have (on average 1.6488958990536278) internal successors, (5227), 3281 states have internal predecessors, (5227), 744 states have call successors, (744), 173 states have call predecessors, (744), 187 states have return successors, (866), 722 states have call predecessors, (866), 739 states have call successors, (866) [2022-11-23 15:27:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4102 states to 4102 states and 6837 transitions. [2022-11-23 15:27:50,008 INFO L78 Accepts]: Start accepts. Automaton has 4102 states and 6837 transitions. Word has length 174 [2022-11-23 15:27:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:50,009 INFO L495 AbstractCegarLoop]: Abstraction has 4102 states and 6837 transitions. [2022-11-23 15:27:50,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:27:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4102 states and 6837 transitions. [2022-11-23 15:27:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-23 15:27:50,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:50,022 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:50,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:27:50,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:27:50,233 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:50,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1938876406, now seen corresponding path program 1 times [2022-11-23 15:27:50,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:50,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827314513] [2022-11-23 15:27:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:50,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-23 15:27:50,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:50,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827314513] [2022-11-23 15:27:50,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827314513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:50,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:50,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:27:50,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778471924] [2022-11-23 15:27:50,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:50,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:27:50,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:50,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:27:50,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:27:50,460 INFO L87 Difference]: Start difference. First operand 4102 states and 6837 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:27:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:51,033 INFO L93 Difference]: Finished difference Result 7212 states and 12193 transitions. [2022-11-23 15:27:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:27:51,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 176 [2022-11-23 15:27:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:51,070 INFO L225 Difference]: With dead ends: 7212 [2022-11-23 15:27:51,070 INFO L226 Difference]: Without dead ends: 4306 [2022-11-23 15:27:51,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:27:51,090 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 99 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:51,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1459 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:27:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2022-11-23 15:27:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 4306. [2022-11-23 15:27:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 3368 states have (on average 1.5840261282660333) internal successors, (5335), 3479 states have internal predecessors, (5335), 744 states have call successors, (744), 179 states have call predecessors, (744), 193 states have return successors, (866), 722 states have call predecessors, (866), 739 states have call successors, (866) [2022-11-23 15:27:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 6945 transitions. [2022-11-23 15:27:51,502 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 6945 transitions. Word has length 176 [2022-11-23 15:27:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:51,503 INFO L495 AbstractCegarLoop]: Abstraction has 4306 states and 6945 transitions. [2022-11-23 15:27:51,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:27:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 6945 transitions. [2022-11-23 15:27:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-23 15:27:51,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:51,517 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:51,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:27:51,517 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1000876549, now seen corresponding path program 1 times [2022-11-23 15:27:51,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:51,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299130668] [2022-11-23 15:27:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:51,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-23 15:27:52,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:52,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299130668] [2022-11-23 15:27:52,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299130668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:52,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:52,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:27:52,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164912670] [2022-11-23 15:27:52,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:52,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:27:52,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:52,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:27:52,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:27:52,033 INFO L87 Difference]: Start difference. First operand 4306 states and 6945 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-23 15:27:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:55,809 INFO L93 Difference]: Finished difference Result 10555 states and 17143 transitions. [2022-11-23 15:27:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 15:27:55,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) Word has length 176 [2022-11-23 15:27:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:55,849 INFO L225 Difference]: With dead ends: 10555 [2022-11-23 15:27:55,849 INFO L226 Difference]: Without dead ends: 5962 [2022-11-23 15:27:55,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:27:55,870 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 1713 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 3628 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 4403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 3628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:55,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1750 Valid, 1597 Invalid, 4403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 3628 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-23 15:27:55,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2022-11-23 15:27:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 5618. [2022-11-23 15:27:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 4294 states have (on average 1.5223567768979973) internal successors, (6537), 4467 states have internal predecessors, (6537), 991 states have call successors, (991), 296 states have call predecessors, (991), 332 states have return successors, (1183), 946 states have call predecessors, (1183), 986 states have call successors, (1183) [2022-11-23 15:27:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 8711 transitions. [2022-11-23 15:27:56,442 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 8711 transitions. Word has length 176 [2022-11-23 15:27:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:56,443 INFO L495 AbstractCegarLoop]: Abstraction has 5618 states and 8711 transitions. [2022-11-23 15:27:56,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-23 15:27:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 8711 transitions. [2022-11-23 15:27:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-23 15:27:56,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:56,461 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:56,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:27:56,462 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash -771494637, now seen corresponding path program 1 times [2022-11-23 15:27:56,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:56,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344005645] [2022-11-23 15:27:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:56,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-23 15:27:56,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:56,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344005645] [2022-11-23 15:27:56,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344005645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:56,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:56,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:27:56,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881475389] [2022-11-23 15:27:56,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:56,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:27:56,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:27:56,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:27:56,927 INFO L87 Difference]: Start difference. First operand 5618 states and 8711 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 5 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 6 states have call predecessors, (26), 4 states have call successors, (26) [2022-11-23 15:28:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:00,291 INFO L93 Difference]: Finished difference Result 10436 states and 16312 transitions. [2022-11-23 15:28:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 15:28:00,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 5 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 6 states have call predecessors, (26), 4 states have call successors, (26) Word has length 177 [2022-11-23 15:28:00,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:00,332 INFO L225 Difference]: With dead ends: 10436 [2022-11-23 15:28:00,333 INFO L226 Difference]: Without dead ends: 7395 [2022-11-23 15:28:00,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:28:00,347 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 1137 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 3882 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 4393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 3882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:00,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 1268 Invalid, 4393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 3882 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 15:28:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7395 states. [2022-11-23 15:28:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7395 to 7117. [2022-11-23 15:28:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 5481 states have (on average 1.5201605546433132) internal successors, (8332), 5704 states have internal predecessors, (8332), 1217 states have call successors, (1217), 366 states have call predecessors, (1217), 418 states have return successors, (1489), 1174 states have call predecessors, (1489), 1212 states have call successors, (1489) [2022-11-23 15:28:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 11038 transitions. [2022-11-23 15:28:00,927 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 11038 transitions. Word has length 177 [2022-11-23 15:28:00,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:00,929 INFO L495 AbstractCegarLoop]: Abstraction has 7117 states and 11038 transitions. [2022-11-23 15:28:00,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 5 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 6 states have call predecessors, (26), 4 states have call successors, (26) [2022-11-23 15:28:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 11038 transitions. [2022-11-23 15:28:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-23 15:28:00,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:00,946 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:00,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:28:00,947 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:28:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:00,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1702737953, now seen corresponding path program 1 times [2022-11-23 15:28:00,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:00,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121928807] [2022-11-23 15:28:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:00,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-23 15:28:03,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121928807] [2022-11-23 15:28:03,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121928807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:28:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799095955] [2022-11-23 15:28:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:03,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:03,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:28:03,260 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:28:03,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ee1b13-fcc8-4932-85c0-fe95d7bdaa77/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:28:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 131 conjunts are in the unsatisfiable core [2022-11-23 15:28:03,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 84 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-23 15:28:07,459 INFO L328 TraceCheckSpWp]: Computing backward predicates...