./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product24.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_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/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_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/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_8cbc86e8-517e-4b20-940d-36364e25b49d/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 bcf02459061acfdf5a11fb9ee5e832193100590b0367d937f266d29520f326a3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:32:06,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:32:06,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:32:06,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:32:06,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:32:06,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:32:06,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:32:06,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:32:06,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:32:06,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:32:06,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:32:06,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:32:06,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:32:06,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:32:06,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:32:06,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:32:06,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:32:06,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:32:06,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:32:06,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:32:06,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:32:06,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:32:06,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:32:06,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:32:06,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:32:06,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:32:06,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:32:06,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:32:06,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:32:06,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:32:06,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:32:06,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:32:06,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:32:06,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:32:06,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:32:06,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:32:06,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:32:06,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:32:06,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:32:06,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:32:06,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:32:06,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:32:06,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:32:06,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:32:06,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:32:06,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:32:06,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:32:06,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:32:06,627 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:32:06,627 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:32:06,627 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:32:06,627 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:32:06,628 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:32:06,629 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:32:06,629 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:32:06,629 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:32:06,629 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:32:06,630 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:32:06,630 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:32:06,630 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:32:06,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:32:06,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:32:06,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:32:06,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:32:06,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:32:06,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:32:06,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:32:06,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:32:06,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:32:06,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:32:06,634 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:32:06,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:32:06,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:32:06,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:32:06,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:32:06,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:32:06,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:32:06,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:32:06,636 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:32:06,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:32:06,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:32:06,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:32:06,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:32:06,637 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_8cbc86e8-517e-4b20-940d-36364e25b49d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcf02459061acfdf5a11fb9ee5e832193100590b0367d937f266d29520f326a3 [2021-11-25 19:32:06,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:32:06,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:32:06,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:32:06,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:32:06,940 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:32:06,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c [2021-11-25 19:32:07,012 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/data/fe5aa0977/4d6f6297f45f48f2a22859311e56e4ba/FLAG499cc7fb5 [2021-11-25 19:32:07,656 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:32:07,657 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c [2021-11-25 19:32:07,693 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/data/fe5aa0977/4d6f6297f45f48f2a22859311e56e4ba/FLAG499cc7fb5 [2021-11-25 19:32:07,844 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/data/fe5aa0977/4d6f6297f45f48f2a22859311e56e4ba [2021-11-25 19:32:07,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:32:07,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:32:07,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:32:07,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:32:07,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:32:07,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:32:07" (1/1) ... [2021-11-25 19:32:07,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5809a957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:07, skipping insertion in model container [2021-11-25 19:32:07,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:32:07" (1/1) ... [2021-11-25 19:32:07,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:32:07,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:32:08,213 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_8cbc86e8-517e-4b20-940d-36364e25b49d/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2021-11-25 19:32:08,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:32:08,581 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:32:08,647 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_8cbc86e8-517e-4b20-940d-36364e25b49d/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2021-11-25 19:32:08,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:32:08,780 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:32:08,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08 WrapperNode [2021-11-25 19:32:08,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:32:08,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:32:08,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:32:08,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:32:08,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,919 INFO L137 Inliner]: procedures = 98, calls = 354, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 926 [2021-11-25 19:32:08,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:32:08,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:32:08,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:32:08,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:32:08,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:09,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:09,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:09,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:32:09,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:32:09,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:32:09,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:32:09,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:09,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:32:09,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:09,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:32:09,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:32:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 19:32:09,114 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 19:32:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 19:32:09,114 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 19:32:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 19:32:09,115 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 19:32:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 19:32:09,115 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 19:32:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 19:32:09,115 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 19:32:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 19:32:09,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 19:32:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 19:32:09,116 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 19:32:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 19:32:09,116 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 19:32:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 19:32:09,117 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 19:32:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 19:32:09,117 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 19:32:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-25 19:32:09,117 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-25 19:32:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:32:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 19:32:09,118 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 19:32:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 19:32:09,119 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 19:32:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 19:32:09,119 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 19:32:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 19:32:09,119 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 19:32:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 19:32:09,120 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 19:32:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 19:32:09,120 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 19:32:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 19:32:09,120 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 19:32:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 19:32:09,121 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 19:32:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 19:32:09,121 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 19:32:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 19:32:09,121 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 19:32:09,122 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 19:32:09,122 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 19:32:09,122 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 19:32:09,123 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 19:32:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 19:32:09,124 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 19:32:09,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:32:09,125 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 19:32:09,125 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 19:32:09,125 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 19:32:09,126 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 19:32:09,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:32:09,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:32:09,126 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 19:32:09,127 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 19:32:09,127 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-25 19:32:09,127 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-25 19:32:09,331 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:32:09,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:32:10,426 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:32:11,050 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:32:11,050 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:32:11,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:32:11 BoogieIcfgContainer [2021-11-25 19:32:11,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:32:11,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:32:11,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:32:11,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:32:11,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:32:07" (1/3) ... [2021-11-25 19:32:11,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9013f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:32:11, skipping insertion in model container [2021-11-25 19:32:11,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (2/3) ... [2021-11-25 19:32:11,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9013f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:32:11, skipping insertion in model container [2021-11-25 19:32:11,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:32:11" (3/3) ... [2021-11-25 19:32:11,062 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product24.cil.c [2021-11-25 19:32:11,067 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:32:11,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:32:11,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:32:11,124 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 19:32:11,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:32:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-25 19:32:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 19:32:11,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:11,174 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] [2021-11-25 19:32:11,175 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:11,181 INFO L85 PathProgramCache]: Analyzing trace with hash 520183605, now seen corresponding path program 1 times [2021-11-25 19:32:11,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:11,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486662824] [2021-11-25 19:32:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:11,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:11,828 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 19:32:11,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:11,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486662824] [2021-11-25 19:32:11,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486662824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:11,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:11,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:32:11,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686615520] [2021-11-25 19:32:11,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:11,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:32:11,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:11,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:32:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:32:11,867 INFO L87 Difference]: Start difference. First operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-25 19:32:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:14,204 INFO L93 Difference]: Finished difference Result 1329 states and 2129 transitions. [2021-11-25 19:32:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:32:14,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2021-11-25 19:32:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:14,232 INFO L225 Difference]: With dead ends: 1329 [2021-11-25 19:32:14,232 INFO L226 Difference]: Without dead ends: 933 [2021-11-25 19:32:14,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:32:14,248 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 1679 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:14,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1753 Valid, 1296 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 19:32:14,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-11-25 19:32:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 846. [2021-11-25 19:32:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 589 states have (on average 1.5823429541595926) internal successors, (932), 619 states have internal predecessors, (932), 207 states have call successors, (207), 48 states have call predecessors, (207), 49 states have return successors, (209), 191 states have call predecessors, (209), 202 states have call successors, (209) [2021-11-25 19:32:14,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1348 transitions. [2021-11-25 19:32:14,471 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1348 transitions. Word has length 54 [2021-11-25 19:32:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:14,472 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1348 transitions. [2021-11-25 19:32:14,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-25 19:32:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1348 transitions. [2021-11-25 19:32:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 19:32:14,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:14,487 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:14,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:32:14,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2131121629, now seen corresponding path program 1 times [2021-11-25 19:32:14,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:14,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147003535] [2021-11-25 19:32:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:14,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:32:14,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:14,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147003535] [2021-11-25 19:32:14,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147003535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:14,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:14,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 19:32:14,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905788358] [2021-11-25 19:32:14,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:14,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:32:14,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:14,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:32:14,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:32:14,814 INFO L87 Difference]: Start difference. First operand 846 states and 1348 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 19:32:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:17,921 INFO L93 Difference]: Finished difference Result 2916 states and 4689 transitions. [2021-11-25 19:32:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:32:17,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 98 [2021-11-25 19:32:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:17,941 INFO L225 Difference]: With dead ends: 2916 [2021-11-25 19:32:17,941 INFO L226 Difference]: Without dead ends: 2093 [2021-11-25 19:32:17,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:32:17,950 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 1415 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 4345 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 2639 SdHoareTripleChecker+Invalid, 5112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 4345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:17,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 2639 Invalid, 5112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 4345 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:32:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-11-25 19:32:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1906. [2021-11-25 19:32:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1290 states have (on average 1.5534883720930233) internal successors, (2004), 1362 states have internal predecessors, (2004), 512 states have call successors, (512), 91 states have call predecessors, (512), 103 states have return successors, (531), 485 states have call predecessors, (531), 507 states have call successors, (531) [2021-11-25 19:32:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3047 transitions. [2021-11-25 19:32:18,118 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3047 transitions. Word has length 98 [2021-11-25 19:32:18,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:18,119 INFO L470 AbstractCegarLoop]: Abstraction has 1906 states and 3047 transitions. [2021-11-25 19:32:18,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 19:32:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3047 transitions. [2021-11-25 19:32:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 19:32:18,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:18,124 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:18,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:32:18,125 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1596055414, now seen corresponding path program 1 times [2021-11-25 19:32:18,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:18,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733408618] [2021-11-25 19:32:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:18,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:32:18,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:18,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733408618] [2021-11-25 19:32:18,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733408618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:18,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:18,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:32:18,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558057637] [2021-11-25 19:32:18,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:18,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:32:18,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:32:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:32:18,343 INFO L87 Difference]: Start difference. First operand 1906 states and 3047 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 19:32:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:20,700 INFO L93 Difference]: Finished difference Result 4803 states and 7696 transitions. [2021-11-25 19:32:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:32:20,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2021-11-25 19:32:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:20,729 INFO L225 Difference]: With dead ends: 4803 [2021-11-25 19:32:20,730 INFO L226 Difference]: Without dead ends: 2922 [2021-11-25 19:32:20,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 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 19:32:20,745 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 1204 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:20,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1287 Valid, 1974 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 2430 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 19:32:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2021-11-25 19:32:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2804. [2021-11-25 19:32:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 1924 states have (on average 1.5618503118503118) internal successors, (3005), 2023 states have internal predecessors, (3005), 714 states have call successors, (714), 145 states have call predecessors, (714), 165 states have return successors, (761), 679 states have call predecessors, (761), 709 states have call successors, (761) [2021-11-25 19:32:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4480 transitions. [2021-11-25 19:32:20,964 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4480 transitions. Word has length 99 [2021-11-25 19:32:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:20,965 INFO L470 AbstractCegarLoop]: Abstraction has 2804 states and 4480 transitions. [2021-11-25 19:32:20,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 19:32:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4480 transitions. [2021-11-25 19:32:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-25 19:32:20,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:20,971 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:20,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:32:20,972 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash 387870079, now seen corresponding path program 1 times [2021-11-25 19:32:20,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:20,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842005841] [2021-11-25 19:32:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:20,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:32:21,125 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:21,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842005841] [2021-11-25 19:32:21,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842005841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:21,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:21,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:32:21,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041704351] [2021-11-25 19:32:21,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:21,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:32:21,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:32:21,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:32:21,128 INFO L87 Difference]: Start difference. First operand 2804 states and 4480 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 19:32:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:21,891 INFO L93 Difference]: Finished difference Result 2905 states and 4646 transitions. [2021-11-25 19:32:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:32:21,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2021-11-25 19:32:21,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:21,916 INFO L225 Difference]: With dead ends: 2905 [2021-11-25 19:32:21,916 INFO L226 Difference]: Without dead ends: 2890 [2021-11-25 19:32:21,919 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 19:32:21,920 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 699 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:21,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1964 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:32:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2021-11-25 19:32:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2810. [2021-11-25 19:32:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 1930 states have (on average 1.560103626943005) internal successors, (3011), 2029 states have internal predecessors, (3011), 714 states have call successors, (714), 145 states have call predecessors, (714), 165 states have return successors, (761), 679 states have call predecessors, (761), 709 states have call successors, (761) [2021-11-25 19:32:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 4486 transitions. [2021-11-25 19:32:22,126 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 4486 transitions. Word has length 103 [2021-11-25 19:32:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:22,128 INFO L470 AbstractCegarLoop]: Abstraction has 2810 states and 4486 transitions. [2021-11-25 19:32:22,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 19:32:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 4486 transitions. [2021-11-25 19:32:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 19:32:22,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:22,130 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:22,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:32:22,131 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:22,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:22,131 INFO L85 PathProgramCache]: Analyzing trace with hash -797193323, now seen corresponding path program 1 times [2021-11-25 19:32:22,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:22,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248816183] [2021-11-25 19:32:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:22,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:32:22,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:22,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248816183] [2021-11-25 19:32:22,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248816183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:22,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:22,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-25 19:32:22,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496814421] [2021-11-25 19:32:22,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:22,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:32:22,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:32:22,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:32:22,388 INFO L87 Difference]: Start difference. First operand 2810 states and 4486 transitions. Second operand has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 19:32:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:28,225 INFO L93 Difference]: Finished difference Result 3235 states and 5128 transitions. [2021-11-25 19:32:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 19:32:28,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 108 [2021-11-25 19:32:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:28,254 INFO L225 Difference]: With dead ends: 3235 [2021-11-25 19:32:28,254 INFO L226 Difference]: Without dead ends: 3218 [2021-11-25 19:32:28,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 19:32:28,259 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 2750 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 8955 mSolverCounterSat, 1676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2779 SdHoareTripleChecker+Valid, 4424 SdHoareTripleChecker+Invalid, 10631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1676 IncrementalHoareTripleChecker+Valid, 8955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:28,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2779 Valid, 4424 Invalid, 10631 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1676 Valid, 8955 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-25 19:32:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2021-11-25 19:32:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2998. [2021-11-25 19:32:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2072 states have (on average 1.5608108108108107) internal successors, (3234), 2169 states have internal predecessors, (3234), 731 states have call successors, (731), 175 states have call predecessors, (731), 194 states have return successors, (782), 697 states have call predecessors, (782), 726 states have call successors, (782) [2021-11-25 19:32:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4747 transitions. [2021-11-25 19:32:28,484 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4747 transitions. Word has length 108 [2021-11-25 19:32:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:28,486 INFO L470 AbstractCegarLoop]: Abstraction has 2998 states and 4747 transitions. [2021-11-25 19:32:28,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 19:32:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4747 transitions. [2021-11-25 19:32:28,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-25 19:32:28,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:28,491 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:28,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:32:28,491 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1226989648, now seen corresponding path program 1 times [2021-11-25 19:32:28,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:28,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803237164] [2021-11-25 19:32:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:28,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:32:29,177 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:29,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803237164] [2021-11-25 19:32:29,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803237164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:29,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727765715] [2021-11-25 19:32:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:29,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:29,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:29,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:29,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:32:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:29,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:32:29,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 19:32:29,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:32:29,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727765715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:29,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:32:29,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [23] total 25 [2021-11-25 19:32:29,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086208382] [2021-11-25 19:32:29,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:29,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:32:29,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:29,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:32:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:32:29,945 INFO L87 Difference]: Start difference. First operand 2998 states and 4747 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-25 19:32:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:30,221 INFO L93 Difference]: Finished difference Result 3161 states and 5014 transitions. [2021-11-25 19:32:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:32:30,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2021-11-25 19:32:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:30,245 INFO L225 Difference]: With dead ends: 3161 [2021-11-25 19:32:30,246 INFO L226 Difference]: Without dead ends: 3146 [2021-11-25 19:32:30,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:32:30,252 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 47 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:30,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1853 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-11-25 19:32:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 3012. [2021-11-25 19:32:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 2086 states have (on average 1.5570469798657718) internal successors, (3248), 2183 states have internal predecessors, (3248), 731 states have call successors, (731), 175 states have call predecessors, (731), 194 states have return successors, (782), 697 states have call predecessors, (782), 726 states have call successors, (782) [2021-11-25 19:32:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 4761 transitions. [2021-11-25 19:32:30,472 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 4761 transitions. Word has length 115 [2021-11-25 19:32:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:30,474 INFO L470 AbstractCegarLoop]: Abstraction has 3012 states and 4761 transitions. [2021-11-25 19:32:30,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-25 19:32:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 4761 transitions. [2021-11-25 19:32:30,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-25 19:32:30,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:30,482 INFO L514 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:30,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:30,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:32:30,700 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1796488684, now seen corresponding path program 1 times [2021-11-25 19:32:30,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:30,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378120077] [2021-11-25 19:32:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:30,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-25 19:32:31,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:31,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378120077] [2021-11-25 19:32:31,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378120077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:31,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756457544] [2021-11-25 19:32:31,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:31,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:31,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:31,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:31,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cbc86e8-517e-4b20-940d-36364e25b49d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:32:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-25 19:32:31,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 19:32:32,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:22,174 WARN L227 SmtUtils]: Spent 2.78m on a formula simplification. DAG size of input: 2889 DAG size of output: 109 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 19:38:05,237 WARN L227 SmtUtils]: Spent 2.69m on a formula simplification. DAG size of input: 2889 DAG size of output: 109 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 19:40:48,300 WARN L227 SmtUtils]: Spent 2.69m on a formula simplification. DAG size of input: 2885 DAG size of output: 105 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)