./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.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_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/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_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/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_528af0a8-d673-4fc2-a788-87e27b21bb40/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 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec --- 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 15:51:46,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:51:46,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:51:46,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:51:46,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:51:46,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:51:46,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:51:46,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:51:46,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:51:46,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:51:46,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:51:46,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:51:46,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:51:46,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:51:46,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:51:46,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:51:46,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:51:46,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:51:46,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:51:46,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:51:46,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:51:46,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:51:46,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:51:46,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:51:46,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:51:46,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:51:46,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:51:46,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:51:46,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:51:46,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:51:46,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:51:46,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:51:46,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:51:46,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:51:46,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:51:46,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:51:46,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:51:46,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:51:46,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:51:46,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:51:46,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:51:46,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:51:46,625 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:51:46,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:51:46,626 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:51:46,626 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:51:46,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:51:46,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:51:46,628 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:51:46,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:51:46,628 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:51:46,628 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:51:46,630 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:51:46,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:51:46,630 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:51:46,630 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:51:46,631 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:51:46,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:51:46,631 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:51:46,631 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:51:46,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:51:46,632 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:51:46,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:51:46,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:51:46,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:51:46,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:51:46,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:51:46,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:51:46,634 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:51:46,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:51:46,634 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:51:46,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:51:46,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:51:46,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:51:46,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:51:46,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:51:46,636 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:51:46,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:51:46,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:51:46,636 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:51:46,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:51:46,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:51:46,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:51:46,637 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_528af0a8-d673-4fc2-a788-87e27b21bb40/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec [2022-11-23 15:51:46,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:51:46,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:51:46,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:51:46,980 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:51:46,981 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:51:46,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2022-11-23 15:51:49,969 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:51:50,365 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:51:50,367 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2022-11-23 15:51:50,401 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/data/9fb2142bf/673022aee75049c38c0de407976ca661/FLAG2f85837e6 [2022-11-23 15:51:50,419 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/data/9fb2142bf/673022aee75049c38c0de407976ca661 [2022-11-23 15:51:50,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:51:50,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:51:50,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:51:50,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:51:50,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:51:50,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:51:50" (1/1) ... [2022-11-23 15:51:50,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f710da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:50, skipping insertion in model container [2022-11-23 15:51:50,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:51:50" (1/1) ... [2022-11-23 15:51:50,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:51:50,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:51:50,704 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_528af0a8-d673-4fc2-a788-87e27b21bb40/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2022-11-23 15:51:51,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:51:51,097 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:51:51,111 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_528af0a8-d673-4fc2-a788-87e27b21bb40/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2022-11-23 15:51:51,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:51:51,241 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:51:51,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51 WrapperNode [2022-11-23 15:51:51,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:51:51,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:51:51,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:51:51,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:51:51,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,357 INFO L138 Inliner]: procedures = 93, calls = 338, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1129 [2022-11-23 15:51:51,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:51:51,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:51:51,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:51:51,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:51:51,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,437 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:51:51,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:51:51,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:51:51,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:51:51,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (1/1) ... [2022-11-23 15:51:51,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:51:51,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:51:51,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:51:51,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:51:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:51:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 15:51:51,532 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 15:51:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:51:51,533 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:51:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-23 15:51:51,533 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-23 15:51:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:51:51,533 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:51:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:51:51,534 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:51:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:51:51,534 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:51:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:51:51,534 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:51:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-23 15:51:51,535 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-23 15:51:51,535 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:51:51,535 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:51:51,535 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:51:51,535 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:51:51,535 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:51:51,536 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:51:51,536 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:51:51,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:51:51,536 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 15:51:51,536 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 15:51:51,536 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:51:51,537 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:51:51,537 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-23 15:51:51,537 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-23 15:51:51,537 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:51:51,537 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:51:51,537 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:51:51,537 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:51:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:51:51,538 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:51:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:51:51,538 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:51:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:51:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:51:51,539 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:51:51,539 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:51:51,539 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:51:51,539 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:51:51,539 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:51:51,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:51:51,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:51:51,540 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:51:51,540 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:51:51,705 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:51:51,708 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:51:53,027 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:51:53,947 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:51:53,948 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:51:53,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:51:53 BoogieIcfgContainer [2022-11-23 15:51:53,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:51:53,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:51:53,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:51:53,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:51:53,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:51:50" (1/3) ... [2022-11-23 15:51:53,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569199a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:51:53, skipping insertion in model container [2022-11-23 15:51:53,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:51" (2/3) ... [2022-11-23 15:51:53,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569199a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:51:53, skipping insertion in model container [2022-11-23 15:51:53,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:51:53" (3/3) ... [2022-11-23 15:51:53,979 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product11.cil.c [2022-11-23 15:51:54,002 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:51:54,003 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:51:54,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:51:54,094 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;@2e3161c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:51:54,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:51:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-23 15:51:54,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 15:51:54,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:51:54,142 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:51:54,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:51:54,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:51:54,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1444079820, now seen corresponding path program 1 times [2022-11-23 15:51:54,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:51:54,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712409790] [2022-11-23 15:51:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:54,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:51:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:51:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:51:54,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:51:54,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712409790] [2022-11-23 15:51:54,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712409790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:51:54,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:51:54,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:51:54,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128158250] [2022-11-23 15:51:54,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:51:54,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:51:54,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:54,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:51:54,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:51:54,817 INFO L87 Difference]: Start difference. First operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-23 15:51:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:51:55,071 INFO L93 Difference]: Finished difference Result 386 states and 614 transitions. [2022-11-23 15:51:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:51:55,075 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2022-11-23 15:51:55,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:51:55,102 INFO L225 Difference]: With dead ends: 386 [2022-11-23 15:51:55,103 INFO L226 Difference]: Without dead ends: 364 [2022-11-23 15:51:55,112 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 15:51:55,117 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:51:55,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 547 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:51:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-23 15:51:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-11-23 15:51:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 247 states have (on average 1.591093117408907) internal successors, (393), 266 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-23 15:51:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 576 transitions. [2022-11-23 15:51:55,246 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 576 transitions. Word has length 77 [2022-11-23 15:51:55,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:51:55,250 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 576 transitions. [2022-11-23 15:51:55,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-23 15:51:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 576 transitions. [2022-11-23 15:51:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 15:51:55,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:51:55,259 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:51:55,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:51:55,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:51:55,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:51:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash -655749484, now seen corresponding path program 1 times [2022-11-23 15:51:55,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:51:55,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326528338] [2022-11-23 15:51:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:55,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:51:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:51:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:51:55,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:51:55,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326528338] [2022-11-23 15:51:55,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326528338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:51:55,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:51:55,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:51:55,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720455878] [2022-11-23 15:51:55,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:51:55,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:51:55,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:55,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:51:55,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:51:55,855 INFO L87 Difference]: Start difference. First operand 364 states and 576 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:51:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:51:58,520 INFO L93 Difference]: Finished difference Result 1123 states and 1807 transitions. [2022-11-23 15:51:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:51:58,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2022-11-23 15:51:58,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:51:58,530 INFO L225 Difference]: With dead ends: 1123 [2022-11-23 15:51:58,530 INFO L226 Difference]: Without dead ends: 775 [2022-11-23 15:51:58,541 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 15:51:58,543 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1135 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:51:58,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 1606 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 15:51:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-11-23 15:51:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 726. [2022-11-23 15:51:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 501 states have (on average 1.6027944111776447) internal successors, (803), 534 states have internal predecessors, (803), 182 states have call successors, (182), 42 states have call predecessors, (182), 42 states have return successors, (183), 174 states have call predecessors, (183), 177 states have call successors, (183) [2022-11-23 15:51:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1168 transitions. [2022-11-23 15:51:58,623 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1168 transitions. Word has length 78 [2022-11-23 15:51:58,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:51:58,624 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1168 transitions. [2022-11-23 15:51:58,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:51:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1168 transitions. [2022-11-23 15:51:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 15:51:58,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:51:58,628 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:51:58,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:51:58,629 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:51:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:51:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash 609540514, now seen corresponding path program 1 times [2022-11-23 15:51:58,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:51:58,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037691726] [2022-11-23 15:51:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:58,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:51:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:51:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:51:58,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:51:58,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037691726] [2022-11-23 15:51:58,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037691726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:51:58,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:51:58,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:51:58,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234032315] [2022-11-23 15:51:58,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:51:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:51:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:58,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:51:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:51:58,881 INFO L87 Difference]: Start difference. First operand 726 states and 1168 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:52:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:00,511 INFO L93 Difference]: Finished difference Result 2341 states and 3831 transitions. [2022-11-23 15:52:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 82 [2022-11-23 15:52:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:00,529 INFO L225 Difference]: With dead ends: 2341 [2022-11-23 15:52:00,529 INFO L226 Difference]: Without dead ends: 1631 [2022-11-23 15:52:00,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 15:52:00,537 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1157 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:00,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 710 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:52:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2022-11-23 15:52:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1465. [2022-11-23 15:52:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1033 states have (on average 1.611810261374637) internal successors, (1665), 1096 states have internal predecessors, (1665), 351 states have call successors, (351), 75 states have call predecessors, (351), 80 states have return successors, (369), 329 states have call predecessors, (369), 346 states have call successors, (369) [2022-11-23 15:52:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2385 transitions. [2022-11-23 15:52:00,753 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2385 transitions. Word has length 82 [2022-11-23 15:52:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:00,754 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 2385 transitions. [2022-11-23 15:52:00,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:52:00,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2385 transitions. [2022-11-23 15:52:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-23 15:52:00,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:00,759 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:52:00,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:52:00,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1715752045, now seen corresponding path program 1 times [2022-11-23 15:52:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:00,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807447512] [2022-11-23 15:52:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:00,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:52:01,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:01,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807447512] [2022-11-23 15:52:01,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807447512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:01,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:52:01,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:52:01,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127353160] [2022-11-23 15:52:01,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:01,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:52:01,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:52:01,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:52:01,113 INFO L87 Difference]: Start difference. First operand 1465 states and 2385 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:52:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:02,860 INFO L93 Difference]: Finished difference Result 4492 states and 7429 transitions. [2022-11-23 15:52:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:02,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 83 [2022-11-23 15:52:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:02,898 INFO L225 Difference]: With dead ends: 4492 [2022-11-23 15:52:02,899 INFO L226 Difference]: Without dead ends: 3044 [2022-11-23 15:52:02,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 15:52:02,919 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 1148 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:02,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 714 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:52:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-11-23 15:52:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2831. [2022-11-23 15:52:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2019 states have (on average 1.6186230807330362) internal successors, (3268), 2149 states have internal predecessors, (3268), 652 states have call successors, (652), 141 states have call predecessors, (652), 159 states have return successors, (730), 602 states have call predecessors, (730), 647 states have call successors, (730) [2022-11-23 15:52:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 4650 transitions. [2022-11-23 15:52:03,197 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 4650 transitions. Word has length 83 [2022-11-23 15:52:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:03,197 INFO L495 AbstractCegarLoop]: Abstraction has 2831 states and 4650 transitions. [2022-11-23 15:52:03,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:52:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 4650 transitions. [2022-11-23 15:52:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 15:52:03,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:03,201 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:52:03,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:52:03,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:03,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1648575044, now seen corresponding path program 1 times [2022-11-23 15:52:03,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:03,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915619898] [2022-11-23 15:52:03,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:03,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:52:03,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:03,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915619898] [2022-11-23 15:52:03,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915619898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:03,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:52:03,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:52:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160883079] [2022-11-23 15:52:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:03,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:52:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:52:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:52:03,419 INFO L87 Difference]: Start difference. First operand 2831 states and 4650 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:52:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:05,511 INFO L93 Difference]: Finished difference Result 8636 states and 14501 transitions. [2022-11-23 15:52:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2022-11-23 15:52:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:05,557 INFO L225 Difference]: With dead ends: 8636 [2022-11-23 15:52:05,558 INFO L226 Difference]: Without dead ends: 5824 [2022-11-23 15:52:05,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 15:52:05,575 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1131 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:05,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 727 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 15:52:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5824 states. [2022-11-23 15:52:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5824 to 5508. [2022-11-23 15:52:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5508 states, 3946 states have (on average 1.6188545362392297) internal successors, (6388), 4216 states have internal predecessors, (6388), 1238 states have call successors, (1238), 273 states have call predecessors, (1238), 323 states have return successors, (1528), 1132 states have call predecessors, (1528), 1233 states have call successors, (1528) [2022-11-23 15:52:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5508 states to 5508 states and 9154 transitions. [2022-11-23 15:52:06,046 INFO L78 Accepts]: Start accepts. Automaton has 5508 states and 9154 transitions. Word has length 84 [2022-11-23 15:52:06,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:06,046 INFO L495 AbstractCegarLoop]: Abstraction has 5508 states and 9154 transitions. [2022-11-23 15:52:06,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:52:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 5508 states and 9154 transitions. [2022-11-23 15:52:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 15:52:06,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:06,050 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:52:06,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:52:06,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash -433908081, now seen corresponding path program 1 times [2022-11-23 15:52:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:06,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554416494] [2022-11-23 15:52:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:52:06,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:06,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554416494] [2022-11-23 15:52:06,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554416494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:06,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:52:06,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:52:06,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413379357] [2022-11-23 15:52:06,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:06,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:52:06,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:52:06,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:52:06,325 INFO L87 Difference]: Start difference. First operand 5508 states and 9154 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:52:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:08,663 INFO L93 Difference]: Finished difference Result 16777 states and 28932 transitions. [2022-11-23 15:52:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:08,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2022-11-23 15:52:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:08,772 INFO L225 Difference]: With dead ends: 16777 [2022-11-23 15:52:08,773 INFO L226 Difference]: Without dead ends: 11292 [2022-11-23 15:52:08,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 15:52:08,813 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1118 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:08,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 739 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:52:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11292 states. [2022-11-23 15:52:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11292 to 10761. [2022-11-23 15:52:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10761 states, 7717 states have (on average 1.6156537514578204) internal successors, (12468), 8279 states have internal predecessors, (12468), 2380 states have call successors, (2380), 537 states have call predecessors, (2380), 663 states have return successors, (3422), 2162 states have call predecessors, (3422), 2375 states have call successors, (3422) [2022-11-23 15:52:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10761 states to 10761 states and 18270 transitions. [2022-11-23 15:52:09,962 INFO L78 Accepts]: Start accepts. Automaton has 10761 states and 18270 transitions. Word has length 85 [2022-11-23 15:52:09,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:09,964 INFO L495 AbstractCegarLoop]: Abstraction has 10761 states and 18270 transitions. [2022-11-23 15:52:09,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:52:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 10761 states and 18270 transitions. [2022-11-23 15:52:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 15:52:09,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:09,969 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:52:09,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:52:09,969 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash -566371610, now seen corresponding path program 1 times [2022-11-23 15:52:09,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:09,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920652849] [2022-11-23 15:52:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:09,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:52:10,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:10,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920652849] [2022-11-23 15:52:10,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920652849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:10,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:52:10,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:52:10,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762264368] [2022-11-23 15:52:10,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:10,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:52:10,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:52:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:52:10,229 INFO L87 Difference]: Start difference. First operand 10761 states and 18270 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:52:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:13,579 INFO L93 Difference]: Finished difference Result 32850 states and 59500 transitions. [2022-11-23 15:52:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-23 15:52:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:13,822 INFO L225 Difference]: With dead ends: 32850 [2022-11-23 15:52:13,823 INFO L226 Difference]: Without dead ends: 22110 [2022-11-23 15:52:13,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 15:52:13,895 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 1109 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:13,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1175 Valid, 753 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:52:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22110 states. [2022-11-23 15:52:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22110 to 21042. [2022-11-23 15:52:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21042 states, 15119 states have (on average 1.6141940604537337) internal successors, (24405), 16243 states have internal predecessors, (24405), 4604 states have call successors, (4604), 1063 states have call predecessors, (4604), 1318 states have return successors, (8041), 4161 states have call predecessors, (8041), 4599 states have call successors, (8041) [2022-11-23 15:52:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21042 states to 21042 states and 37050 transitions. [2022-11-23 15:52:16,354 INFO L78 Accepts]: Start accepts. Automaton has 21042 states and 37050 transitions. Word has length 86 [2022-11-23 15:52:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:16,355 INFO L495 AbstractCegarLoop]: Abstraction has 21042 states and 37050 transitions. [2022-11-23 15:52:16,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:52:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21042 states and 37050 transitions. [2022-11-23 15:52:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 15:52:16,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:16,361 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:52:16,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:52:16,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:16,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1596749731, now seen corresponding path program 1 times [2022-11-23 15:52:16,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:16,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860572310] [2022-11-23 15:52:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:16,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-23 15:52:16,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:16,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860572310] [2022-11-23 15:52:16,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860572310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:16,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:52:16,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:52:16,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35302511] [2022-11-23 15:52:16,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:16,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:52:16,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:52:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:52:16,604 INFO L87 Difference]: Start difference. First operand 21042 states and 37050 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 15:52:18,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:18,718 INFO L93 Difference]: Finished difference Result 45343 states and 83079 transitions. [2022-11-23 15:52:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 130 [2022-11-23 15:52:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:18,930 INFO L225 Difference]: With dead ends: 45343 [2022-11-23 15:52:18,930 INFO L226 Difference]: Without dead ends: 24318 [2022-11-23 15:52:19,072 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 15:52:19,073 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 126 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:19,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1708 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:52:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24318 states. [2022-11-23 15:52:20,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24318 to 21282. [2022-11-23 15:52:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21282 states, 15342 states have (on average 1.608330074305827) internal successors, (24675), 16450 states have internal predecessors, (24675), 4621 states have call successors, (4621), 1063 states have call predecessors, (4621), 1318 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-11-23 15:52:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21282 states to 21282 states and 37354 transitions. [2022-11-23 15:52:21,133 INFO L78 Accepts]: Start accepts. Automaton has 21282 states and 37354 transitions. Word has length 130 [2022-11-23 15:52:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:21,133 INFO L495 AbstractCegarLoop]: Abstraction has 21282 states and 37354 transitions. [2022-11-23 15:52:21,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 15:52:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 21282 states and 37354 transitions. [2022-11-23 15:52:21,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-23 15:52:21,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:21,139 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:52:21,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:52:21,140 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:21,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1692686386, now seen corresponding path program 1 times [2022-11-23 15:52:21,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:21,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952825213] [2022-11-23 15:52:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:21,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-23 15:52:21,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952825213] [2022-11-23 15:52:21,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952825213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982477980] [2022-11-23 15:52:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:21,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:21,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:21,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:21,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:52:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:21,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:52:21,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 15:52:21,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:21,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982477980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:21,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:21,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:52:21,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151603624] [2022-11-23 15:52:21,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:21,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:52:21,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:21,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:52:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:52:21,943 INFO L87 Difference]: Start difference. First operand 21282 states and 37354 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:52:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:24,537 INFO L93 Difference]: Finished difference Result 45043 states and 82294 transitions. [2022-11-23 15:52:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 133 [2022-11-23 15:52:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:24,699 INFO L225 Difference]: With dead ends: 45043 [2022-11-23 15:52:24,699 INFO L226 Difference]: Without dead ends: 23778 [2022-11-23 15:52:24,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 133 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 15:52:24,799 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 213 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:24,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1410 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:52:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23778 states. [2022-11-23 15:52:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23778 to 23778. [2022-11-23 15:52:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23778 states, 17774 states have (on average 1.651119612917745) internal successors, (29347), 18882 states have internal predecessors, (29347), 4621 states have call successors, (4621), 1127 states have call predecessors, (4621), 1382 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-11-23 15:52:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23778 states to 23778 states and 42026 transitions. [2022-11-23 15:52:26,919 INFO L78 Accepts]: Start accepts. Automaton has 23778 states and 42026 transitions. Word has length 133 [2022-11-23 15:52:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:26,920 INFO L495 AbstractCegarLoop]: Abstraction has 23778 states and 42026 transitions. [2022-11-23 15:52:26,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:52:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 23778 states and 42026 transitions. [2022-11-23 15:52:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-23 15:52:26,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:26,928 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:52:26,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:52:27,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:27,136 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:27,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:27,137 INFO L85 PathProgramCache]: Analyzing trace with hash -863520034, now seen corresponding path program 1 times [2022-11-23 15:52:27,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:27,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044849857] [2022-11-23 15:52:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:27,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-23 15:52:27,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:27,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044849857] [2022-11-23 15:52:27,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044849857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:27,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616516315] [2022-11-23 15:52:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:27,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:27,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:27,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:27,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:52:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:28,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:52:28,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 15:52:28,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:28,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616516315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:28,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:28,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:52:28,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422964092] [2022-11-23 15:52:28,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:28,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:52:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:52:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:52:28,106 INFO L87 Difference]: Start difference. First operand 23778 states and 42026 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:52:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:29,952 INFO L93 Difference]: Finished difference Result 50035 states and 91572 transitions. [2022-11-23 15:52:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:29,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 138 [2022-11-23 15:52:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:30,066 INFO L225 Difference]: With dead ends: 50035 [2022-11-23 15:52:30,067 INFO L226 Difference]: Without dead ends: 26274 [2022-11-23 15:52:30,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 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 15:52:30,138 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 211 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:30,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1410 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:52:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26274 states. [2022-11-23 15:52:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26274 to 26274. [2022-11-23 15:52:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26274 states, 20206 states have (on average 1.683608829060675) internal successors, (34019), 21314 states have internal predecessors, (34019), 4621 states have call successors, (4621), 1191 states have call predecessors, (4621), 1446 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-11-23 15:52:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26274 states to 26274 states and 46698 transitions. [2022-11-23 15:52:32,051 INFO L78 Accepts]: Start accepts. Automaton has 26274 states and 46698 transitions. Word has length 138 [2022-11-23 15:52:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:32,052 INFO L495 AbstractCegarLoop]: Abstraction has 26274 states and 46698 transitions. [2022-11-23 15:52:32,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:52:32,053 INFO L276 IsEmpty]: Start isEmpty. Operand 26274 states and 46698 transitions. [2022-11-23 15:52:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 15:52:32,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:32,063 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:52:32,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 15:52:32,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:52:32,272 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2087132578, now seen corresponding path program 1 times [2022-11-23 15:52:32,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:32,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712992104] [2022-11-23 15:52:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:32,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-23 15:52:32,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:32,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712992104] [2022-11-23 15:52:32,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712992104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:32,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326708081] [2022-11-23 15:52:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:32,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:32,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:32,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:32,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:52:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:33,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:52:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:52:33,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:33,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326708081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:33,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:33,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:52:33,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652163043] [2022-11-23 15:52:33,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:33,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:52:33,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:52:33,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:52:33,103 INFO L87 Difference]: Start difference. First operand 26274 states and 46698 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:52:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:34,984 INFO L93 Difference]: Finished difference Result 55027 states and 100850 transitions. [2022-11-23 15:52:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 142 [2022-11-23 15:52:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:35,113 INFO L225 Difference]: With dead ends: 55027 [2022-11-23 15:52:35,113 INFO L226 Difference]: Without dead ends: 28770 [2022-11-23 15:52:35,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 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 15:52:35,200 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 209 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:35,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1410 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:52:35,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28770 states. [2022-11-23 15:52:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28770 to 28770. [2022-11-23 15:52:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28770 states, 22638 states have (on average 1.7091174131990459) internal successors, (38691), 23746 states have internal predecessors, (38691), 4621 states have call successors, (4621), 1255 states have call predecessors, (4621), 1510 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-11-23 15:52:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28770 states to 28770 states and 51370 transitions. [2022-11-23 15:52:37,211 INFO L78 Accepts]: Start accepts. Automaton has 28770 states and 51370 transitions. Word has length 142 [2022-11-23 15:52:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:37,211 INFO L495 AbstractCegarLoop]: Abstraction has 28770 states and 51370 transitions. [2022-11-23 15:52:37,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:52:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 28770 states and 51370 transitions. [2022-11-23 15:52:37,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-23 15:52:37,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:37,220 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 15:52:37,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:52:37,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:52:37,430 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:37,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1789605358, now seen corresponding path program 1 times [2022-11-23 15:52:37,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:37,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831725170] [2022-11-23 15:52:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:37,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-23 15:52:40,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831725170] [2022-11-23 15:52:40,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831725170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928719026] [2022-11-23 15:52:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:40,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:40,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:40,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:52:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:40,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:52:40,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:52:40,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:40,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928719026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:40,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:40,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-11-23 15:52:40,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961338649] [2022-11-23 15:52:40,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:40,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:52:40,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:40,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:52:40,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:52:40,845 INFO L87 Difference]: Start difference. First operand 28770 states and 51370 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:52:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:42,843 INFO L93 Difference]: Finished difference Result 60019 states and 110128 transitions. [2022-11-23 15:52:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:42,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 145 [2022-11-23 15:52:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:42,981 INFO L225 Difference]: With dead ends: 60019 [2022-11-23 15:52:42,982 INFO L226 Difference]: Without dead ends: 31266 [2022-11-23 15:52:43,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:52:43,067 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 207 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:43,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1410 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:52:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31266 states. [2022-11-23 15:52:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31266 to 31266. [2022-11-23 15:52:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31266 states, 25070 states have (on average 1.7296769046669327) internal successors, (43363), 26178 states have internal predecessors, (43363), 4621 states have call successors, (4621), 1319 states have call predecessors, (4621), 1574 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-11-23 15:52:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31266 states to 31266 states and 56042 transitions. [2022-11-23 15:52:44,688 INFO L78 Accepts]: Start accepts. Automaton has 31266 states and 56042 transitions. Word has length 145 [2022-11-23 15:52:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:44,689 INFO L495 AbstractCegarLoop]: Abstraction has 31266 states and 56042 transitions. [2022-11-23 15:52:44,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:52:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 31266 states and 56042 transitions. [2022-11-23 15:52:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 15:52:44,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:44,696 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 15:52:44,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:52:44,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:44,904 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1778802114, now seen corresponding path program 1 times [2022-11-23 15:52:44,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:44,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938643655] [2022-11-23 15:52:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:44,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-23 15:52:47,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938643655] [2022-11-23 15:52:47,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938643655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:47,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268554414] [2022-11-23 15:52:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:47,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:47,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:47,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:47,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:52:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:52:47,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 15:52:47,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:47,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268554414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:47,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:47,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-11-23 15:52:47,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816132109] [2022-11-23 15:52:47,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:47,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:52:47,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:52:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:52:47,911 INFO L87 Difference]: Start difference. First operand 31266 states and 56042 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:52:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:49,671 INFO L93 Difference]: Finished difference Result 65011 states and 119406 transitions. [2022-11-23 15:52:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 147 [2022-11-23 15:52:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:49,783 INFO L225 Difference]: With dead ends: 65011 [2022-11-23 15:52:49,783 INFO L226 Difference]: Without dead ends: 33762 [2022-11-23 15:52:49,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:52:49,841 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 205 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:49,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1410 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:52:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33762 states. [2022-11-23 15:52:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33762 to 33762. [2022-11-23 15:52:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33762 states, 27502 states have (on average 1.746600247254745) internal successors, (48035), 28610 states have internal predecessors, (48035), 4621 states have call successors, (4621), 1383 states have call predecessors, (4621), 1638 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-11-23 15:52:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33762 states to 33762 states and 60714 transitions. [2022-11-23 15:52:51,414 INFO L78 Accepts]: Start accepts. Automaton has 33762 states and 60714 transitions. Word has length 147 [2022-11-23 15:52:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:51,414 INFO L495 AbstractCegarLoop]: Abstraction has 33762 states and 60714 transitions. [2022-11-23 15:52:51,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:52:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 33762 states and 60714 transitions. [2022-11-23 15:52:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 15:52:51,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:51,423 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 15:52:51,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:52:51,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:52:51,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:51,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash -347566611, now seen corresponding path program 1 times [2022-11-23 15:52:51,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:51,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469920379] [2022-11-23 15:52:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:51,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 15:52:53,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:53,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469920379] [2022-11-23 15:52:53,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469920379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:53,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917298941] [2022-11-23 15:52:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:53,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:53,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:53,963 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:53,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:52:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:54,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:52:54,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-23 15:52:54,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:54,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917298941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:54,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:54,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 29 [2022-11-23 15:52:54,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100924087] [2022-11-23 15:52:54,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:54,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:52:54,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:54,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:52:54,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:52:54,711 INFO L87 Difference]: Start difference. First operand 33762 states and 60714 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-23 15:52:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:56,600 INFO L93 Difference]: Finished difference Result 34903 states and 64142 transitions. [2022-11-23 15:52:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 147 [2022-11-23 15:52:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:56,808 INFO L225 Difference]: With dead ends: 34903 [2022-11-23 15:52:56,808 INFO L226 Difference]: Without dead ends: 34746 [2022-11-23 15:52:56,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:52:56,832 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 520 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:56,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 900 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:52:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34746 states. [2022-11-23 15:52:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34746 to 33824. [2022-11-23 15:52:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33824 states, 27564 states have (on average 1.7449209113336235) internal successors, (48097), 28672 states have internal predecessors, (48097), 4621 states have call successors, (4621), 1383 states have call predecessors, (4621), 1638 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-11-23 15:52:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33824 states to 33824 states and 60776 transitions. [2022-11-23 15:52:58,540 INFO L78 Accepts]: Start accepts. Automaton has 33824 states and 60776 transitions. Word has length 147 [2022-11-23 15:52:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:58,541 INFO L495 AbstractCegarLoop]: Abstraction has 33824 states and 60776 transitions. [2022-11-23 15:52:58,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-23 15:52:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 33824 states and 60776 transitions. [2022-11-23 15:52:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-23 15:52:58,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:58,549 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 15:52:58,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:52:58,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:52:58,759 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:58,759 INFO L85 PathProgramCache]: Analyzing trace with hash -192993101, now seen corresponding path program 1 times [2022-11-23 15:52:58,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:58,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573262200] [2022-11-23 15:52:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:58,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 15:53:00,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:00,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573262200] [2022-11-23 15:53:00,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573262200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:53:00,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759560804] [2022-11-23 15:53:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:00,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:00,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:53:00,823 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:53:00,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528af0a8-d673-4fc2-a788-87e27b21bb40/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:53:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:01,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1801 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:53:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:53:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-23 15:53:01,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:53:01,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759560804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:01,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:53:01,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [26] total 29 [2022-11-23 15:53:01,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401555108] [2022-11-23 15:53:01,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:01,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:53:01,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:01,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:53:01,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:53:01,307 INFO L87 Difference]: Start difference. First operand 33824 states and 60776 transitions. Second operand has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-23 15:53:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:02,642 INFO L93 Difference]: Finished difference Result 34051 states and 61061 transitions. [2022-11-23 15:53:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:53:02,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 1 states have call successors, (23) Word has length 152 [2022-11-23 15:53:02,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:02,762 INFO L225 Difference]: With dead ends: 34051 [2022-11-23 15:53:02,762 INFO L226 Difference]: Without dead ends: 33894 [2022-11-23 15:53:02,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:53:02,776 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 30 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:02,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2146 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:53:02,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33894 states.