./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7 --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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:01:58,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:01:58,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:01:58,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:01:58,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:01:58,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:01:58,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:01:58,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:01:58,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:01:58,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:01:58,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:01:58,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:01:58,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:01:58,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:01:58,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:01:58,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:01:58,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:01:58,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:01:58,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:01:58,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:01:58,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:01:58,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:01:58,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:01:58,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:01:58,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:01:58,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:01:58,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:01:58,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:01:58,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:01:58,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:01:58,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:01:58,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:01:58,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:01:58,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:01:58,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:01:58,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:01:58,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:01:58,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:01:58,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:01:58,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:01:58,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:01:58,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:01:58,577 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:01:58,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:01:58,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:01:58,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:01:58,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:01:58,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:01:58,586 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:01:58,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:01:58,587 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:01:58,587 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:01:58,588 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:01:58,588 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:01:58,588 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:01:58,589 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:01:58,589 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:01:58,589 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:01:58,589 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:01:58,590 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:01:58,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:01:58,591 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:01:58,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:01:58,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:01:58,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:01:58,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:01:58,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:01:58,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:01:58,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:01:58,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:01:58,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:01:58,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:01:58,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:01:58,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:01:58,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:01:58,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:01:58,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:01:58,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:01:58,597 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:01:58,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:01:58,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:01:58,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:01:58,598 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:01:58,598 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2021-11-25 20:01:58,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:01:58,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:01:58,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:01:58,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:01:58,937 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:01:58,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-25 20:01:59,005 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/data/aaae462b8/5a6437c3168c4c028ef6729793832c2e/FLAGffb1e5a62 [2021-11-25 20:01:59,730 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:01:59,731 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-25 20:01:59,752 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/data/aaae462b8/5a6437c3168c4c028ef6729793832c2e/FLAGffb1e5a62 [2021-11-25 20:01:59,940 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/data/aaae462b8/5a6437c3168c4c028ef6729793832c2e [2021-11-25 20:01:59,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:01:59,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:01:59,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:01:59,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:01:59,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:01:59,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:01:59" (1/1) ... [2021-11-25 20:01:59,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d289d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:01:59, skipping insertion in model container [2021-11-25 20:01:59,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:01:59" (1/1) ... [2021-11-25 20:01:59,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:02:00,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:02:00,659 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-25 20:02:00,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:02:00,696 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:02:00,841 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-25 20:02:00,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:02:00,886 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:02:00,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00 WrapperNode [2021-11-25 20:02:00,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:02:00,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:02:00,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:02:00,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:02:00,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (1/1) ... [2021-11-25 20:02:00,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (1/1) ... [2021-11-25 20:02:01,038 INFO L137 Inliner]: procedures = 92, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 850 [2021-11-25 20:02:01,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:02:01,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:02:01,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:02:01,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:02:01,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (1/1) ... [2021-11-25 20:02:01,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (1/1) ... [2021-11-25 20:02:01,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (1/1) ... [2021-11-25 20:02:01,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (1/1) ... [2021-11-25 20:02:01,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (1/1) ... [2021-11-25 20:02:01,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (1/1) ... [2021-11-25 20:02:01,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (1/1) ... [2021-11-25 20:02:01,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:02:01,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:02:01,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:02:01,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:02:01,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (1/1) ... [2021-11-25 20:02:01,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:02:01,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:01,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:02:01,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:02:01,252 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-25 20:02:01,253 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-25 20:02:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:02:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:02:01,254 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:02:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 20:02:01,254 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 20:02:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:02:01,254 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:02:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:02:01,255 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:02:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:02:01,255 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:02:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:02:01,255 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:02:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:02:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:02:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 20:02:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 20:02:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 20:02:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 20:02:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:02:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:02:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:02:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:02:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:02:01,258 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:02:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:02:01,258 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:02:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:02:01,258 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:02:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:02:01,259 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:02:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:02:01,259 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:02:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:02:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:02:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:02:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:02:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:02:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 20:02:01,261 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 20:02:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:02:01,261 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:02:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:02:01,262 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:02:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:02:01,263 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:02:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 20:02:01,264 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 20:02:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:02:01,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:02:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:02:01,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:02:01,499 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:02:01,504 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:02:02,507 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:02:03,182 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:02:03,183 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:02:03,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:02:03 BoogieIcfgContainer [2021-11-25 20:02:03,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:02:03,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:02:03,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:02:03,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:02:03,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:01:59" (1/3) ... [2021-11-25 20:02:03,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a953299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:02:03, skipping insertion in model container [2021-11-25 20:02:03,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:00" (2/3) ... [2021-11-25 20:02:03,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a953299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:02:03, skipping insertion in model container [2021-11-25 20:02:03,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:02:03" (3/3) ... [2021-11-25 20:02:03,196 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2021-11-25 20:02:03,201 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:02:03,201 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:02:03,277 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:02:03,286 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:02:03,286 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:02:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-25 20:02:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:02:03,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:03,369 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:02:03,371 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:03,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1790014537, now seen corresponding path program 1 times [2021-11-25 20:02:03,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:03,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748736922] [2021-11-25 20:02:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:03,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:02:03,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:03,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748736922] [2021-11-25 20:02:03,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748736922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:03,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:03,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:02:03,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989360085] [2021-11-25 20:02:03,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:03,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:02:03,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:02:03,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:02:03,973 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-25 20:02:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:04,481 INFO L93 Difference]: Finished difference Result 851 states and 1377 transitions. [2021-11-25 20:02:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:02:04,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2021-11-25 20:02:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:04,512 INFO L225 Difference]: With dead ends: 851 [2021-11-25 20:02:04,513 INFO L226 Difference]: Without dead ends: 490 [2021-11-25 20:02:04,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:04,530 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 282 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:04,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 2344 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:02:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-25 20:02:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 380. [2021-11-25 20:02:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 257 states have (on average 1.5719844357976653) internal successors, (404), 276 states have internal predecessors, (404), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 20:02:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 595 transitions. [2021-11-25 20:02:04,664 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 595 transitions. Word has length 76 [2021-11-25 20:02:04,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:04,665 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 595 transitions. [2021-11-25 20:02:04,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-25 20:02:04,671 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 595 transitions. [2021-11-25 20:02:04,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 20:02:04,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:04,680 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:02:04,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:02:04,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash -798954435, now seen corresponding path program 1 times [2021-11-25 20:02:04,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:04,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411865365] [2021-11-25 20:02:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:04,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:02:05,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:05,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411865365] [2021-11-25 20:02:05,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411865365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:05,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:05,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:02:05,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368713994] [2021-11-25 20:02:05,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:05,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:02:05,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:05,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:02:05,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:02:05,054 INFO L87 Difference]: Start difference. First operand 380 states and 595 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-25 20:02:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:08,095 INFO L93 Difference]: Finished difference Result 1287 states and 2054 transitions. [2021-11-25 20:02:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 20:02:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 79 [2021-11-25 20:02:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:08,109 INFO L225 Difference]: With dead ends: 1287 [2021-11-25 20:02:08,109 INFO L226 Difference]: Without dead ends: 930 [2021-11-25 20:02:08,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:02:08,113 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 1736 mSDsluCounter, 2453 mSDsCounter, 0 mSdLazyCounter, 3410 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 4007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 3410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:08,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1801 Valid, 3101 Invalid, 4007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 3410 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 20:02:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-11-25 20:02:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 874. [2021-11-25 20:02:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 614 states have (on average 1.5944625407166124) internal successors, (979), 645 states have internal predecessors, (979), 206 states have call successors, (206), 49 states have call predecessors, (206), 53 states have return successors, (213), 204 states have call predecessors, (213), 201 states have call successors, (213) [2021-11-25 20:02:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1398 transitions. [2021-11-25 20:02:08,205 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1398 transitions. Word has length 79 [2021-11-25 20:02:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:08,207 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1398 transitions. [2021-11-25 20:02:08,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-25 20:02:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1398 transitions. [2021-11-25 20:02:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 20:02:08,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:08,221 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:02:08,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:02:08,222 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:08,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2051632693, now seen corresponding path program 1 times [2021-11-25 20:02:08,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:08,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615464528] [2021-11-25 20:02:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:08,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:02:08,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:08,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615464528] [2021-11-25 20:02:08,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615464528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:08,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:08,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:02:08,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580669695] [2021-11-25 20:02:08,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:08,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:02:08,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:08,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:02:08,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:08,383 INFO L87 Difference]: Start difference. First operand 874 states and 1398 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:02:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:08,618 INFO L93 Difference]: Finished difference Result 1477 states and 2374 transitions. [2021-11-25 20:02:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:02:08,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2021-11-25 20:02:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:08,628 INFO L225 Difference]: With dead ends: 1477 [2021-11-25 20:02:08,629 INFO L226 Difference]: Without dead ends: 963 [2021-11-25 20:02:08,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:08,633 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 42 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3538 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:08,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3538 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:02:08,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-25 20:02:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 895. [2021-11-25 20:02:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 660 states have internal predecessors, (994), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 210 states have call predecessors, (228), 201 states have call successors, (228) [2021-11-25 20:02:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1428 transitions. [2021-11-25 20:02:08,705 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1428 transitions. Word has length 83 [2021-11-25 20:02:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:08,705 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1428 transitions. [2021-11-25 20:02:08,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:02:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1428 transitions. [2021-11-25 20:02:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 20:02:08,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:08,709 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:02:08,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:02:08,709 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:08,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:08,710 INFO L85 PathProgramCache]: Analyzing trace with hash 492286256, now seen corresponding path program 1 times [2021-11-25 20:02:08,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:08,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543863812] [2021-11-25 20:02:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:08,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:02:09,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:09,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543863812] [2021-11-25 20:02:09,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543863812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:09,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:09,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:02:09,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141556161] [2021-11-25 20:02:09,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:09,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:02:09,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:02:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:09,053 INFO L87 Difference]: Start difference. First operand 895 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-25 20:02:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:12,746 INFO L93 Difference]: Finished difference Result 3647 states and 5917 transitions. [2021-11-25 20:02:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:02:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 84 [2021-11-25 20:02:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:12,771 INFO L225 Difference]: With dead ends: 3647 [2021-11-25 20:02:12,771 INFO L226 Difference]: Without dead ends: 2776 [2021-11-25 20:02:12,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:02:12,778 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 2153 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 955 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2225 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 3709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 955 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:12,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2225 Valid, 2143 Invalid, 3709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [955 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 20:02:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-11-25 20:02:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2572. [2021-11-25 20:02:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 1842 states have (on average 1.5808903365906624) internal successors, (2912), 1933 states have internal predecessors, (2912), 566 states have call successors, (566), 129 states have call predecessors, (566), 163 states have return successors, (656), 570 states have call predecessors, (656), 561 states have call successors, (656) [2021-11-25 20:02:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 4134 transitions. [2021-11-25 20:02:13,032 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 4134 transitions. Word has length 84 [2021-11-25 20:02:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:13,033 INFO L470 AbstractCegarLoop]: Abstraction has 2572 states and 4134 transitions. [2021-11-25 20:02:13,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-25 20:02:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 4134 transitions. [2021-11-25 20:02:13,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 20:02:13,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:13,037 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:02:13,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:02:13,037 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:13,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1679655152, now seen corresponding path program 1 times [2021-11-25 20:02:13,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:13,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102036398] [2021-11-25 20:02:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:13,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:02:13,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:13,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102036398] [2021-11-25 20:02:13,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102036398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:13,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:13,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:02:13,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530678084] [2021-11-25 20:02:13,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:13,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:02:13,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:13,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:02:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:13,171 INFO L87 Difference]: Start difference. First operand 2572 states and 4134 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:02:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:13,508 INFO L93 Difference]: Finished difference Result 4397 states and 7078 transitions. [2021-11-25 20:02:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:02:13,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2021-11-25 20:02:13,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:13,531 INFO L225 Difference]: With dead ends: 4397 [2021-11-25 20:02:13,532 INFO L226 Difference]: Without dead ends: 2821 [2021-11-25 20:02:13,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:13,541 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 42 mSDsluCounter, 3121 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3543 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:13,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 3543 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:02:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-11-25 20:02:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2591. [2021-11-25 20:02:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 1857 states have (on average 1.57619816908993) internal successors, (2927), 1941 states have internal predecessors, (2927), 566 states have call successors, (566), 129 states have call predecessors, (566), 167 states have return successors, (664), 581 states have call predecessors, (664), 561 states have call successors, (664) [2021-11-25 20:02:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 4157 transitions. [2021-11-25 20:02:13,781 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 4157 transitions. Word has length 84 [2021-11-25 20:02:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:13,783 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 4157 transitions. [2021-11-25 20:02:13,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:02:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 4157 transitions. [2021-11-25 20:02:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 20:02:13,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:13,792 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:02:13,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:02:13,793 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:13,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash -216179254, now seen corresponding path program 1 times [2021-11-25 20:02:13,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:13,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175011221] [2021-11-25 20:02:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:13,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:02:13,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:13,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175011221] [2021-11-25 20:02:13,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175011221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:13,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:13,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:02:13,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635876404] [2021-11-25 20:02:13,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:13,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:02:13,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:13,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:02:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:02:13,991 INFO L87 Difference]: Start difference. First operand 2591 states and 4157 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-25 20:02:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:16,316 INFO L93 Difference]: Finished difference Result 5889 states and 9508 transitions. [2021-11-25 20:02:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:02:16,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 91 [2021-11-25 20:02:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:16,350 INFO L225 Difference]: With dead ends: 5889 [2021-11-25 20:02:16,351 INFO L226 Difference]: Without dead ends: 3943 [2021-11-25 20:02:16,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:02:16,366 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 1936 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2100 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 3262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:16,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2100 Valid, 1785 Invalid, 3262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 20:02:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-11-25 20:02:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3767. [2021-11-25 20:02:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 2653 states have (on average 1.5344892574444025) internal successors, (4071), 2786 states have internal predecessors, (4071), 850 states have call successors, (850), 211 states have call predecessors, (850), 263 states have return successors, (1018), 860 states have call predecessors, (1018), 845 states have call successors, (1018) [2021-11-25 20:02:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 5939 transitions. [2021-11-25 20:02:16,745 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 5939 transitions. Word has length 91 [2021-11-25 20:02:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:16,746 INFO L470 AbstractCegarLoop]: Abstraction has 3767 states and 5939 transitions. [2021-11-25 20:02:16,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-25 20:02:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 5939 transitions. [2021-11-25 20:02:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 20:02:16,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:16,750 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:02:16,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:02:16,750 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:16,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1195514453, now seen corresponding path program 1 times [2021-11-25 20:02:16,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:16,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106730096] [2021-11-25 20:02:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:16,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:02:16,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:16,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106730096] [2021-11-25 20:02:16,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106730096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:16,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:16,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:02:16,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209003291] [2021-11-25 20:02:16,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:16,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:02:16,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:16,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:02:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:16,932 INFO L87 Difference]: Start difference. First operand 3767 states and 5939 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:02:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:18,933 INFO L93 Difference]: Finished difference Result 7168 states and 11366 transitions. [2021-11-25 20:02:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:02:18,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 93 [2021-11-25 20:02:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:18,968 INFO L225 Difference]: With dead ends: 7168 [2021-11-25 20:02:18,969 INFO L226 Difference]: Without dead ends: 4273 [2021-11-25 20:02:18,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:02:18,989 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 981 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:18,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1895 Invalid, 2638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-25 20:02:18,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2021-11-25 20:02:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 3848. [2021-11-25 20:02:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 2707 states have (on average 1.528260066494274) internal successors, (4137), 2852 states have internal predecessors, (4137), 853 states have call successors, (853), 226 states have call predecessors, (853), 287 states have return successors, (1052), 860 states have call predecessors, (1052), 848 states have call successors, (1052) [2021-11-25 20:02:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 6042 transitions. [2021-11-25 20:02:19,335 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 6042 transitions. Word has length 93 [2021-11-25 20:02:19,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:19,335 INFO L470 AbstractCegarLoop]: Abstraction has 3848 states and 6042 transitions. [2021-11-25 20:02:19,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:02:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 6042 transitions. [2021-11-25 20:02:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 20:02:19,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:19,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:19,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:02:19,340 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:19,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1977267992, now seen corresponding path program 1 times [2021-11-25 20:02:19,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:19,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822862718] [2021-11-25 20:02:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:19,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:02:19,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:19,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822862718] [2021-11-25 20:02:19,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822862718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:19,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:19,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:02:19,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260574386] [2021-11-25 20:02:19,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:19,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:02:19,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:19,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:02:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:02:19,535 INFO L87 Difference]: Start difference. First operand 3848 states and 6042 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:02:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:20,157 INFO L93 Difference]: Finished difference Result 3952 states and 6204 transitions. [2021-11-25 20:02:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:02:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2021-11-25 20:02:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:20,248 INFO L225 Difference]: With dead ends: 3952 [2021-11-25 20:02:20,248 INFO L226 Difference]: Without dead ends: 3937 [2021-11-25 20:02:20,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:02:20,253 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 684 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:20,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1493 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:02:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2021-11-25 20:02:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3854. [2021-11-25 20:02:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3854 states, 2713 states have (on average 1.5270917803169923) internal successors, (4143), 2858 states have internal predecessors, (4143), 853 states have call successors, (853), 226 states have call predecessors, (853), 287 states have return successors, (1052), 860 states have call predecessors, (1052), 848 states have call successors, (1052) [2021-11-25 20:02:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 6048 transitions. [2021-11-25 20:02:20,584 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 6048 transitions. Word has length 96 [2021-11-25 20:02:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:20,586 INFO L470 AbstractCegarLoop]: Abstraction has 3854 states and 6048 transitions. [2021-11-25 20:02:20,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:02:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 6048 transitions. [2021-11-25 20:02:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 20:02:20,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:20,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:20,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:02:20,592 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1976842914, now seen corresponding path program 1 times [2021-11-25 20:02:20,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:20,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485689707] [2021-11-25 20:02:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:20,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:02:20,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:20,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485689707] [2021-11-25 20:02:20,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485689707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:20,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:20,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:02:20,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24364111] [2021-11-25 20:02:20,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:20,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:02:20,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:02:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:02:20,767 INFO L87 Difference]: Start difference. First operand 3854 states and 6048 transitions. Second operand has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 20:02:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:21,364 INFO L93 Difference]: Finished difference Result 7273 states and 11574 transitions. [2021-11-25 20:02:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:02:21,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 102 [2021-11-25 20:02:21,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:21,406 INFO L225 Difference]: With dead ends: 7273 [2021-11-25 20:02:21,406 INFO L226 Difference]: Without dead ends: 4068 [2021-11-25 20:02:21,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:02:21,428 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 358 mSDsluCounter, 3761 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 4066 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:21,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 4066 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:02:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2021-11-25 20:02:21,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 4054. [2021-11-25 20:02:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4054 states, 2899 states have (on average 1.5050017247326664) internal successors, (4363), 3048 states have internal predecessors, (4363), 858 states have call successors, (858), 231 states have call predecessors, (858), 296 states have return successors, (1053), 865 states have call predecessors, (1053), 853 states have call successors, (1053) [2021-11-25 20:02:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4054 states to 4054 states and 6274 transitions. [2021-11-25 20:02:21,823 INFO L78 Accepts]: Start accepts. Automaton has 4054 states and 6274 transitions. Word has length 102 [2021-11-25 20:02:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:21,824 INFO L470 AbstractCegarLoop]: Abstraction has 4054 states and 6274 transitions. [2021-11-25 20:02:21,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 20:02:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4054 states and 6274 transitions. [2021-11-25 20:02:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 20:02:21,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:21,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:21,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:02:21,829 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:21,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:21,830 INFO L85 PathProgramCache]: Analyzing trace with hash 826552684, now seen corresponding path program 1 times [2021-11-25 20:02:21,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:21,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584729129] [2021-11-25 20:02:21,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:21,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:02:22,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:22,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584729129] [2021-11-25 20:02:22,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584729129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:22,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:22,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:02:22,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737861904] [2021-11-25 20:02:22,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:22,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:02:22,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:22,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:02:22,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:02:22,114 INFO L87 Difference]: Start difference. First operand 4054 states and 6274 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-25 20:02:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:25,980 INFO L93 Difference]: Finished difference Result 14781 states and 23248 transitions. [2021-11-25 20:02:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:02:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2021-11-25 20:02:25,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:26,045 INFO L225 Difference]: With dead ends: 14781 [2021-11-25 20:02:26,046 INFO L226 Difference]: Without dead ends: 10750 [2021-11-25 20:02:26,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:02:26,069 INFO L933 BasicCegarLoop]: 996 mSDtfsCounter, 1815 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 3321 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1879 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 4092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 3321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:26,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1879 Valid, 2506 Invalid, 4092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 3321 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 20:02:26,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-11-25 20:02:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 9497. [2021-11-25 20:02:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9497 states, 6743 states have (on average 1.5152009491324336) internal successors, (10217), 7120 states have internal predecessors, (10217), 2113 states have call successors, (2113), 497 states have call predecessors, (2113), 640 states have return successors, (2544), 2016 states have call predecessors, (2544), 2108 states have call successors, (2544) [2021-11-25 20:02:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9497 states to 9497 states and 14874 transitions. [2021-11-25 20:02:27,027 INFO L78 Accepts]: Start accepts. Automaton has 9497 states and 14874 transitions. Word has length 108 [2021-11-25 20:02:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:27,028 INFO L470 AbstractCegarLoop]: Abstraction has 9497 states and 14874 transitions. [2021-11-25 20:02:27,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-25 20:02:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9497 states and 14874 transitions. [2021-11-25 20:02:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 20:02:27,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:27,033 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:02:27,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:02:27,034 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:27,035 INFO L85 PathProgramCache]: Analyzing trace with hash 98529616, now seen corresponding path program 1 times [2021-11-25 20:02:27,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:27,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431782340] [2021-11-25 20:02:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:27,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:02:27,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:27,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431782340] [2021-11-25 20:02:27,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431782340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:02:27,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892132839] [2021-11-25 20:02:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:27,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:27,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:27,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:02:27,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:02:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:27,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:02:27,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:02:30,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:02:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:02:33,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892132839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:02:33,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691561216] [2021-11-25 20:02:33,444 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2021-11-25 20:02:33,445 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:02:33,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:02:33,456 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:02:33,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:02:41,257 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2021-11-25 20:03:29,624 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2021-11-25 20:03:36,824 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 102 for LOIs [2021-11-25 20:03:37,386 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 117 for LOIs [2021-11-25 20:03:37,995 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-25 20:03:38,005 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 75 for LOIs [2021-11-25 20:03:38,025 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 93 for LOIs [2021-11-25 20:03:38,039 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2021-11-25 20:03:41,691 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 453 for LOIs [2021-11-25 20:03:41,915 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 101 for LOIs [2021-11-25 20:03:42,269 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 75 for LOIs [2021-11-25 20:03:42,279 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2021-11-25 20:03:45,127 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs [2021-11-25 20:03:50,869 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 656 for LOIs [2021-11-25 20:03:51,305 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:04,433 WARN L227 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 656 DAG size of output: 587 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:04:11,681 WARN L227 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 696 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:04:17,931 WARN L227 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:04:24,111 WARN L227 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:04:42,374 WARN L227 SmtUtils]: Spent 16.56s on a formula simplification. DAG size of input: 829 DAG size of output: 681 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:04:49,844 WARN L227 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 834 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:06:43,823 WARN L227 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 567 DAG size of output: 511 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:06:43,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [691561216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:43,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:06:43,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [20, 12, 12] total 108 [2021-11-25 20:06:43,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846434238] [2021-11-25 20:06:43,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:43,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-25 20:06:43,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-25 20:06:43,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=10813, Unknown=0, NotChecked=0, Total=11556 [2021-11-25 20:06:43,832 INFO L87 Difference]: Start difference. First operand 9497 states and 14874 transitions. Second operand has 73 states, 59 states have (on average 1.11864406779661) internal successors, (66), 47 states have internal predecessors, (66), 20 states have call successors, (20), 14 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-25 20:06:54,732 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 739 DAG size of output: 656 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:07:46,490 WARN L227 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 681 DAG size of output: 615 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:07:52,175 WARN L227 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 684 DAG size of output: 618 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:07:57,966 WARN L227 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 688 DAG size of output: 622 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:08:03,776 WARN L227 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 690 DAG size of output: 624 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:09:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:48,100 INFO L93 Difference]: Finished difference Result 19892 states and 31072 transitions. [2021-11-25 20:09:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-25 20:09:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 59 states have (on average 1.11864406779661) internal successors, (66), 47 states have internal predecessors, (66), 20 states have call successors, (20), 14 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 110 [2021-11-25 20:09:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:48,160 INFO L225 Difference]: With dead ends: 19892 [2021-11-25 20:09:48,160 INFO L226 Difference]: Without dead ends: 10418 [2021-11-25 20:09:48,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 243 SyntacticMatches, 6 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 301.4s TimeCoverageRelationStatistics Valid=1267, Invalid=19039, Unknown=0, NotChecked=0, Total=20306 [2021-11-25 20:09:48,209 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 1016 mSDsluCounter, 10793 mSDsCounter, 0 mSdLazyCounter, 21158 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 11146 SdHoareTripleChecker+Invalid, 21423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 21158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:48,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 11146 Invalid, 21423 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [265 Valid, 21158 Invalid, 0 Unknown, 0 Unchecked, 55.0s Time] [2021-11-25 20:09:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10418 states. [2021-11-25 20:09:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10418 to 10143. [2021-11-25 20:09:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10143 states, 7239 states have (on average 1.5040751485011743) internal successors, (10888), 7619 states have internal predecessors, (10888), 2211 states have call successors, (2211), 537 states have call predecessors, (2211), 692 states have return successors, (2670), 2123 states have call predecessors, (2670), 2206 states have call successors, (2670) [2021-11-25 20:09:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 15769 transitions. [2021-11-25 20:09:49,176 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 15769 transitions. Word has length 110 [2021-11-25 20:09:49,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:49,177 INFO L470 AbstractCegarLoop]: Abstraction has 10143 states and 15769 transitions. [2021-11-25 20:09:49,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 59 states have (on average 1.11864406779661) internal successors, (66), 47 states have internal predecessors, (66), 20 states have call successors, (20), 14 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-25 20:09:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 15769 transitions. [2021-11-25 20:09:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-25 20:09:49,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:49,182 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:49,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:49,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:49,398 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:49,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:49,399 INFO L85 PathProgramCache]: Analyzing trace with hash 256910990, now seen corresponding path program 1 times [2021-11-25 20:09:49,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:49,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366308844] [2021-11-25 20:09:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:49,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:09:49,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:49,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366308844] [2021-11-25 20:09:49,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366308844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:49,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:49,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 20:09:49,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138388221] [2021-11-25 20:09:49,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:49,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:09:49,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:09:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:09:49,608 INFO L87 Difference]: Start difference. First operand 10143 states and 15769 transitions. Second operand has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 7 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-25 20:09:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:52,423 INFO L93 Difference]: Finished difference Result 19349 states and 30352 transitions. [2021-11-25 20:09:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:09:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 7 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 111 [2021-11-25 20:09:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:52,489 INFO L225 Difference]: With dead ends: 19349 [2021-11-25 20:09:52,489 INFO L226 Difference]: Without dead ends: 11895 [2021-11-25 20:09:52,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:09:52,517 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 1859 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 3398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:52,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1934 Valid, 1572 Invalid, 3398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 20:09:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11895 states. [2021-11-25 20:09:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11895 to 11059. [2021-11-25 20:09:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11059 states, 7911 states have (on average 1.5013272658323853) internal successors, (11877), 8312 states have internal predecessors, (11877), 2357 states have call successors, (2357), 606 states have call predecessors, (2357), 790 states have return successors, (2958), 2277 states have call predecessors, (2958), 2352 states have call successors, (2958) [2021-11-25 20:09:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11059 states to 11059 states and 17192 transitions. [2021-11-25 20:09:53,866 INFO L78 Accepts]: Start accepts. Automaton has 11059 states and 17192 transitions. Word has length 111 [2021-11-25 20:09:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:53,867 INFO L470 AbstractCegarLoop]: Abstraction has 11059 states and 17192 transitions. [2021-11-25 20:09:53,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 7 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-25 20:09:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 11059 states and 17192 transitions. [2021-11-25 20:09:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-25 20:09:53,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:53,873 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:53,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:09:53,873 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:53,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:53,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1911394316, now seen corresponding path program 1 times [2021-11-25 20:09:53,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:53,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771748801] [2021-11-25 20:09:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:53,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:09:54,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:54,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771748801] [2021-11-25 20:09:54,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771748801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:54,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450858075] [2021-11-25 20:09:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:54,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:54,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:54,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:54,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430b5a6f-b76e-4751-a8da-7c807496297d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:09:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1881 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:09:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:09:56,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:09:59,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450858075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:59,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724721272] [2021-11-25 20:09:59,274 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2021-11-25 20:09:59,274 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:59,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:59,275 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:59,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:04,897 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2021-11-25 20:10:51,516 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2021-11-25 20:10:58,525 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 102 for LOIs [2021-11-25 20:10:59,049 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 117 for LOIs [2021-11-25 20:10:59,745 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 28 for LOIs [2021-11-25 20:10:59,757 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 75 for LOIs [2021-11-25 20:10:59,777 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 93 for LOIs [2021-11-25 20:10:59,792 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2021-11-25 20:11:03,432 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 448 for LOIs [2021-11-25 20:11:03,675 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 101 for LOIs [2021-11-25 20:11:03,977 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 75 for LOIs [2021-11-25 20:11:03,987 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2021-11-25 20:11:06,644 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs [2021-11-25 20:11:12,350 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 656 for LOIs [2021-11-25 20:11:12,793 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:11:26,479 WARN L227 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 656 DAG size of output: 587 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:11:34,274 WARN L227 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 696 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:11:40,929 WARN L227 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:11:47,548 WARN L227 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:12:07,818 WARN L227 SmtUtils]: Spent 18.09s on a formula simplification. DAG size of input: 829 DAG size of output: 681 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:12:15,995 WARN L227 SmtUtils]: Spent 6.62s on a formula simplification that was a NOOP. DAG size: 834 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)