./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh --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 d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:49:57,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:49:57,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:49:57,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:49:57,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:49:57,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:49:57,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:49:57,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:49:57,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:49:57,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:49:57,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:49:57,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:49:57,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:49:57,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:49:57,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:49:57,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:49:57,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:49:57,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:49:57,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:49:57,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:49:57,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:49:57,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:49:57,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:49:57,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:49:57,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:49:57,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:49:57,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:49:57,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:49:57,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:49:57,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:49:57,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:49:57,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:49:57,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:49:57,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:49:57,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:49:57,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:49:57,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:49:57,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:49:57,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:49:57,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:49:57,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:49:57,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:49:57,651 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:49:57,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:49:57,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:49:57,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:49:57,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:49:57,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:49:57,657 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:49:57,657 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:49:57,657 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:49:57,657 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:49:57,658 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:49:57,658 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:49:57,658 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:49:57,658 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:49:57,658 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:49:57,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:49:57,659 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:49:57,659 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:49:57,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:49:57,660 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:49:57,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:49:57,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:49:57,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:49:57,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:49:57,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:49:57,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:49:57,661 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:49:57,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:49:57,661 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:49:57,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:49:57,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:49:57,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:49:57,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:49:57,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:49:57,662 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:49:57,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:49:57,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:49:57,663 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:49:57,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:49:57,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:49:57,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:49:57,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 [2022-12-14 05:49:57,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:49:57,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:49:57,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:49:57,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:49:57,875 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:49:57,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2022-12-14 05:50:00,391 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:50:00,615 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:50:00,615 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2022-12-14 05:50:00,627 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/data/3405c62d9/3528f6e77de94d6d8e50b44056cd1096/FLAGbd4eae14d [2022-12-14 05:50:00,638 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/data/3405c62d9/3528f6e77de94d6d8e50b44056cd1096 [2022-12-14 05:50:00,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:50:00,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:50:00,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:50:00,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:50:00,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:50:00,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:50:00" (1/1) ... [2022-12-14 05:50:00,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ca90d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:00, skipping insertion in model container [2022-12-14 05:50:00,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:50:00" (1/1) ... [2022-12-14 05:50:00,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:50:00,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:50:00,938 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2022-12-14 05:50:00,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:50:00,997 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:50:01,067 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2022-12-14 05:50:01,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:50:01,101 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:50:01,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01 WrapperNode [2022-12-14 05:50:01,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:50:01,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:50:01,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:50:01,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:50:01,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,155 INFO L138 Inliner]: procedures = 93, calls = 337, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 814 [2022-12-14 05:50:01,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:50:01,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:50:01,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:50:01,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:50:01,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,205 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:50:01,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:50:01,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:50:01,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:50:01,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (1/1) ... [2022-12-14 05:50:01,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:50:01,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:01,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:50:01,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:50:01,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:50:01,279 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 05:50:01,279 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 05:50:01,279 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 05:50:01,280 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 05:50:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 05:50:01,280 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 05:50:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 05:50:01,280 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 05:50:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 05:50:01,280 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 05:50:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 05:50:01,280 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 05:50:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 05:50:01,280 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 05:50:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 05:50:01,281 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 05:50:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 05:50:01,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 05:50:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 05:50:01,281 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 05:50:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 05:50:01,281 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 05:50:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 05:50:01,281 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 05:50:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 05:50:01,282 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 05:50:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 05:50:01,282 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 05:50:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2022-12-14 05:50:01,282 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2022-12-14 05:50:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 05:50:01,283 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 05:50:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 05:50:01,283 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 05:50:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 05:50:01,283 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 05:50:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-12-14 05:50:01,283 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-12-14 05:50:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:50:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 05:50:01,284 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 05:50:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 05:50:01,284 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 05:50:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 05:50:01,285 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 05:50:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:50:01,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:50:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 05:50:01,285 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 05:50:01,386 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:50:01,388 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:50:02,112 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:50:02,585 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:50:02,585 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 05:50:02,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:50:02 BoogieIcfgContainer [2022-12-14 05:50:02,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:50:02,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:50:02,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:50:02,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:50:02,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:50:00" (1/3) ... [2022-12-14 05:50:02,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cd4208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:50:02, skipping insertion in model container [2022-12-14 05:50:02,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:01" (2/3) ... [2022-12-14 05:50:02,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cd4208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:50:02, skipping insertion in model container [2022-12-14 05:50:02,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:50:02" (3/3) ... [2022-12-14 05:50:02,595 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product26.cil.c [2022-12-14 05:50:02,610 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:50:02,611 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:50:02,659 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:50:02,664 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c46dcc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:50:02,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:50:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 351 states, 237 states have (on average 1.6118143459915613) internal successors, (382), 260 states have internal predecessors, (382), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (89), 82 states have call predecessors, (89), 89 states have call successors, (89) [2022-12-14 05:50:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 05:50:02,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:02,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:02,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1702315402, now seen corresponding path program 1 times [2022-12-14 05:50:02,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:02,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266794098] [2022-12-14 05:50:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:02,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:03,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:03,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266794098] [2022-12-14 05:50:03,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266794098] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:03,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:03,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:50:03,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864332389] [2022-12-14 05:50:03,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:03,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 05:50:03,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 05:50:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 05:50:03,043 INFO L87 Difference]: Start difference. First operand has 351 states, 237 states have (on average 1.6118143459915613) internal successors, (382), 260 states have internal predecessors, (382), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (89), 82 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 05:50:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:03,178 INFO L93 Difference]: Finished difference Result 369 states and 587 transitions. [2022-12-14 05:50:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 05:50:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 39 [2022-12-14 05:50:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:03,194 INFO L225 Difference]: With dead ends: 369 [2022-12-14 05:50:03,195 INFO L226 Difference]: Without dead ends: 347 [2022-12-14 05:50:03,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 05:50:03,201 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:03,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 516 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-12-14 05:50:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2022-12-14 05:50:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 235 states have (on average 1.6) internal successors, (376), 256 states have internal predecessors, (376), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2022-12-14 05:50:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 549 transitions. [2022-12-14 05:50:03,267 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 549 transitions. Word has length 39 [2022-12-14 05:50:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:03,269 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 549 transitions. [2022-12-14 05:50:03,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 05:50:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 549 transitions. [2022-12-14 05:50:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 05:50:03,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:03,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:03,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:50:03,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2074572773, now seen corresponding path program 1 times [2022-12-14 05:50:03,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:03,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581344537] [2022-12-14 05:50:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:03,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:03,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:03,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581344537] [2022-12-14 05:50:03,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581344537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:03,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:03,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:50:03,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668649200] [2022-12-14 05:50:03,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:03,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:50:03,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:50:03,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:50:03,587 INFO L87 Difference]: Start difference. First operand 347 states and 549 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 05:50:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:04,963 INFO L93 Difference]: Finished difference Result 1123 states and 1814 transitions. [2022-12-14 05:50:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:50:04,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 40 [2022-12-14 05:50:04,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:04,970 INFO L225 Difference]: With dead ends: 1123 [2022-12-14 05:50:04,970 INFO L226 Difference]: Without dead ends: 792 [2022-12-14 05:50:04,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:50:04,975 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1462 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:04,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 879 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 05:50:04,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-12-14 05:50:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 695. [2022-12-14 05:50:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 491 states have (on average 1.6191446028513239) internal successors, (795), 521 states have internal predecessors, (795), 163 states have call successors, (163), 39 states have call predecessors, (163), 40 states have return successors, (165), 147 states have call predecessors, (165), 158 states have call successors, (165) [2022-12-14 05:50:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1123 transitions. [2022-12-14 05:50:05,038 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1123 transitions. Word has length 40 [2022-12-14 05:50:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:05,039 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1123 transitions. [2022-12-14 05:50:05,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 05:50:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1123 transitions. [2022-12-14 05:50:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 05:50:05,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:05,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:05,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:50:05,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash -685851965, now seen corresponding path program 1 times [2022-12-14 05:50:05,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:05,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985308804] [2022-12-14 05:50:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:05,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:05,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:05,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985308804] [2022-12-14 05:50:05,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985308804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:05,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:05,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:50:05,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265869937] [2022-12-14 05:50:05,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:05,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:50:05,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:05,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:50:05,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:50:05,337 INFO L87 Difference]: Start difference. First operand 695 states and 1123 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 05:50:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:06,905 INFO L93 Difference]: Finished difference Result 2349 states and 3843 transitions. [2022-12-14 05:50:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 05:50:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2022-12-14 05:50:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:06,917 INFO L225 Difference]: With dead ends: 2349 [2022-12-14 05:50:06,918 INFO L226 Difference]: Without dead ends: 1671 [2022-12-14 05:50:06,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:50:06,923 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 1609 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:06,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1666 Valid, 1521 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 05:50:06,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-12-14 05:50:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1602. [2022-12-14 05:50:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1161 states have (on average 1.6391042204995694) internal successors, (1903), 1221 states have internal predecessors, (1903), 348 states have call successors, (348), 81 states have call predecessors, (348), 92 states have return successors, (375), 323 states have call predecessors, (375), 343 states have call successors, (375) [2022-12-14 05:50:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2626 transitions. [2022-12-14 05:50:07,031 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2626 transitions. Word has length 62 [2022-12-14 05:50:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:07,031 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2626 transitions. [2022-12-14 05:50:07,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 05:50:07,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2626 transitions. [2022-12-14 05:50:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 05:50:07,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:07,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:07,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 05:50:07,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash -344703974, now seen corresponding path program 1 times [2022-12-14 05:50:07,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:07,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396471577] [2022-12-14 05:50:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:07,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:07,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:07,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396471577] [2022-12-14 05:50:07,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396471577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:07,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:07,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:50:07,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983169923] [2022-12-14 05:50:07,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:07,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:50:07,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:07,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:50:07,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:50:07,160 INFO L87 Difference]: Start difference. First operand 1602 states and 2626 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 05:50:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:07,330 INFO L93 Difference]: Finished difference Result 2584 states and 4245 transitions. [2022-12-14 05:50:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:50:07,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2022-12-14 05:50:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:07,340 INFO L225 Difference]: With dead ends: 2584 [2022-12-14 05:50:07,340 INFO L226 Difference]: Without dead ends: 1642 [2022-12-14 05:50:07,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:50:07,345 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 7 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:07,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2025 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-12-14 05:50:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1626. [2022-12-14 05:50:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1179 states have (on average 1.6293469041560644) internal successors, (1921), 1239 states have internal predecessors, (1921), 348 states have call successors, (348), 81 states have call predecessors, (348), 98 states have return successors, (387), 329 states have call predecessors, (387), 343 states have call successors, (387) [2022-12-14 05:50:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2656 transitions. [2022-12-14 05:50:07,418 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2656 transitions. Word has length 66 [2022-12-14 05:50:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:07,418 INFO L495 AbstractCegarLoop]: Abstraction has 1626 states and 2656 transitions. [2022-12-14 05:50:07,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 05:50:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2656 transitions. [2022-12-14 05:50:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 05:50:07,420 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:07,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:07,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 05:50:07,420 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:07,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1051542339, now seen corresponding path program 1 times [2022-12-14 05:50:07,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:07,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647886178] [2022-12-14 05:50:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:07,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:07,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647886178] [2022-12-14 05:50:07,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647886178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:07,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:07,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 05:50:07,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640468051] [2022-12-14 05:50:07,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:07,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:50:07,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:50:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:50:07,645 INFO L87 Difference]: Start difference. First operand 1626 states and 2656 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 05:50:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:09,773 INFO L93 Difference]: Finished difference Result 4439 states and 7263 transitions. [2022-12-14 05:50:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 05:50:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 69 [2022-12-14 05:50:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:09,784 INFO L225 Difference]: With dead ends: 4439 [2022-12-14 05:50:09,784 INFO L226 Difference]: Without dead ends: 2829 [2022-12-14 05:50:09,789 INFO L412 NwaCegarLoop]: 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 [2022-12-14 05:50:09,790 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 1198 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 4034 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 4620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 4034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:09,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 1800 Invalid, 4620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 4034 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 05:50:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2022-12-14 05:50:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2676. [2022-12-14 05:50:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 1912 states have (on average 1.61663179916318) internal successors, (3091), 2015 states have internal predecessors, (3091), 608 states have call successors, (608), 121 states have call predecessors, (608), 155 states have return successors, (673), 584 states have call predecessors, (673), 603 states have call successors, (673) [2022-12-14 05:50:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 4372 transitions. [2022-12-14 05:50:09,903 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 4372 transitions. Word has length 69 [2022-12-14 05:50:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:09,903 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 4372 transitions. [2022-12-14 05:50:09,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 05:50:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 4372 transitions. [2022-12-14 05:50:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 05:50:09,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:09,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:09,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 05:50:09,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1313678786, now seen corresponding path program 1 times [2022-12-14 05:50:09,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:09,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69861680] [2022-12-14 05:50:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:09,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:10,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:10,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69861680] [2022-12-14 05:50:10,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69861680] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:10,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:10,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 05:50:10,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102344383] [2022-12-14 05:50:10,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:10,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:50:10,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:10,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:50:10,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:50:10,099 INFO L87 Difference]: Start difference. First operand 2676 states and 4372 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 05:50:11,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:11,738 INFO L93 Difference]: Finished difference Result 6610 states and 10814 transitions. [2022-12-14 05:50:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:50:11,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 70 [2022-12-14 05:50:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:11,753 INFO L225 Difference]: With dead ends: 6610 [2022-12-14 05:50:11,753 INFO L226 Difference]: Without dead ends: 4404 [2022-12-14 05:50:11,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:50:11,760 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 2129 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2266 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:11,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2266 Valid, 1130 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 05:50:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2022-12-14 05:50:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 4296. [2022-12-14 05:50:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 3003 states have (on average 1.57009657009657) internal successors, (4715), 3184 states have internal predecessors, (4715), 1017 states have call successors, (1017), 215 states have call predecessors, (1017), 275 states have return successors, (1153), 974 states have call predecessors, (1153), 1012 states have call successors, (1153) [2022-12-14 05:50:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6885 transitions. [2022-12-14 05:50:11,969 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6885 transitions. Word has length 70 [2022-12-14 05:50:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:11,969 INFO L495 AbstractCegarLoop]: Abstraction has 4296 states and 6885 transitions. [2022-12-14 05:50:11,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 05:50:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6885 transitions. [2022-12-14 05:50:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 05:50:11,971 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:11,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:11,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 05:50:11,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:11,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1921260673, now seen corresponding path program 1 times [2022-12-14 05:50:11,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:11,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120624887] [2022-12-14 05:50:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:11,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:12,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:12,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120624887] [2022-12-14 05:50:12,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120624887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:12,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:12,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 05:50:12,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757430968] [2022-12-14 05:50:12,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:12,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 05:50:12,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 05:50:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:50:12,202 INFO L87 Difference]: Start difference. First operand 4296 states and 6885 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 05:50:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:14,657 INFO L93 Difference]: Finished difference Result 8821 states and 14379 transitions. [2022-12-14 05:50:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 05:50:14,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 73 [2022-12-14 05:50:14,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:14,673 INFO L225 Difference]: With dead ends: 8821 [2022-12-14 05:50:14,673 INFO L226 Difference]: Without dead ends: 4455 [2022-12-14 05:50:14,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 05:50:14,687 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 1899 mSDsluCounter, 2476 mSDsCounter, 0 mSdLazyCounter, 5549 mSolverCounterSat, 1072 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 SdHoareTripleChecker+Valid, 2926 SdHoareTripleChecker+Invalid, 6621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1072 IncrementalHoareTripleChecker+Valid, 5549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:14,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1917 Valid, 2926 Invalid, 6621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1072 Valid, 5549 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 05:50:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4455 states. [2022-12-14 05:50:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4455 to 4317. [2022-12-14 05:50:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4317 states, 3014 states have (on average 1.528533510285335) internal successors, (4607), 3195 states have internal predecessors, (4607), 1019 states have call successors, (1019), 223 states have call predecessors, (1019), 283 states have return successors, (1155), 975 states have call predecessors, (1155), 1014 states have call successors, (1155) [2022-12-14 05:50:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 6781 transitions. [2022-12-14 05:50:14,924 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 6781 transitions. Word has length 73 [2022-12-14 05:50:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:14,924 INFO L495 AbstractCegarLoop]: Abstraction has 4317 states and 6781 transitions. [2022-12-14 05:50:14,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 05:50:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 6781 transitions. [2022-12-14 05:50:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 05:50:14,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:14,926 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:14,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 05:50:14,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:14,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1857700608, now seen corresponding path program 1 times [2022-12-14 05:50:14,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:14,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940170256] [2022-12-14 05:50:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:14,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:50:15,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:15,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940170256] [2022-12-14 05:50:15,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940170256] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:15,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:15,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:50:15,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496841073] [2022-12-14 05:50:15,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:15,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:50:15,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:50:15,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:50:15,112 INFO L87 Difference]: Start difference. First operand 4317 states and 6781 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 05:50:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:16,269 INFO L93 Difference]: Finished difference Result 8482 states and 13353 transitions. [2022-12-14 05:50:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:50:16,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-12-14 05:50:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:16,286 INFO L225 Difference]: With dead ends: 8482 [2022-12-14 05:50:16,286 INFO L226 Difference]: Without dead ends: 4749 [2022-12-14 05:50:16,295 INFO L412 NwaCegarLoop]: 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 [2022-12-14 05:50:16,296 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 894 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:16,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 1392 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 05:50:16,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2022-12-14 05:50:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 4407. [2022-12-14 05:50:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 3074 states have (on average 1.5227716330513987) internal successors, (4681), 3269 states have internal predecessors, (4681), 1021 states have call successors, (1021), 239 states have call predecessors, (1021), 311 states have return successors, (1193), 975 states have call predecessors, (1193), 1016 states have call successors, (1193) [2022-12-14 05:50:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 6895 transitions. [2022-12-14 05:50:16,597 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 6895 transitions. Word has length 75 [2022-12-14 05:50:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:16,597 INFO L495 AbstractCegarLoop]: Abstraction has 4407 states and 6895 transitions. [2022-12-14 05:50:16,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 05:50:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 6895 transitions. [2022-12-14 05:50:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 05:50:16,600 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:16,600 INFO L195 NwaCegarLoop]: 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] [2022-12-14 05:50:16,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 05:50:16,600 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1020202750, now seen corresponding path program 1 times [2022-12-14 05:50:16,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:16,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567504988] [2022-12-14 05:50:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:16,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:50:16,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:16,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567504988] [2022-12-14 05:50:16,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567504988] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:16,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:16,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:50:16,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221248013] [2022-12-14 05:50:16,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:16,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:50:16,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:16,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:50:16,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:16,686 INFO L87 Difference]: Start difference. First operand 4407 states and 6895 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 05:50:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:17,055 INFO L93 Difference]: Finished difference Result 11264 states and 17737 transitions. [2022-12-14 05:50:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:50:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 82 [2022-12-14 05:50:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:17,082 INFO L225 Difference]: With dead ends: 11264 [2022-12-14 05:50:17,082 INFO L226 Difference]: Without dead ends: 6873 [2022-12-14 05:50:17,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:17,095 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 503 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:17,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1100 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:17,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6873 states. [2022-12-14 05:50:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6873 to 6784. [2022-12-14 05:50:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6784 states, 4747 states have (on average 1.520117969243733) internal successors, (7216), 5061 states have internal predecessors, (7216), 1559 states have call successors, (1559), 361 states have call predecessors, (1559), 477 states have return successors, (1871), 1473 states have call predecessors, (1871), 1554 states have call successors, (1871) [2022-12-14 05:50:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6784 states to 6784 states and 10646 transitions. [2022-12-14 05:50:17,438 INFO L78 Accepts]: Start accepts. Automaton has 6784 states and 10646 transitions. Word has length 82 [2022-12-14 05:50:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:17,438 INFO L495 AbstractCegarLoop]: Abstraction has 6784 states and 10646 transitions. [2022-12-14 05:50:17,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 05:50:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 6784 states and 10646 transitions. [2022-12-14 05:50:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 05:50:17,440 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:17,440 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1] [2022-12-14 05:50:17,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 05:50:17,440 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1474223640, now seen corresponding path program 1 times [2022-12-14 05:50:17,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:17,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520867550] [2022-12-14 05:50:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:17,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:50:17,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:17,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520867550] [2022-12-14 05:50:17,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520867550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:17,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:17,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:50:17,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291825806] [2022-12-14 05:50:17,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:17,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:50:17,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:50:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:17,504 INFO L87 Difference]: Start difference. First operand 6784 states and 10646 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 05:50:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:18,150 INFO L93 Difference]: Finished difference Result 18396 states and 29113 transitions. [2022-12-14 05:50:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:50:18,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 80 [2022-12-14 05:50:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:18,184 INFO L225 Difference]: With dead ends: 18396 [2022-12-14 05:50:18,184 INFO L226 Difference]: Without dead ends: 11629 [2022-12-14 05:50:18,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:18,201 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 502 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:18,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 1106 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11629 states. [2022-12-14 05:50:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11629 to 11539. [2022-12-14 05:50:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11539 states, 8094 states have (on average 1.5174203113417346) internal successors, (12282), 8646 states have internal predecessors, (12282), 2635 states have call successors, (2635), 605 states have call predecessors, (2635), 809 states have return successors, (3285), 2469 states have call predecessors, (3285), 2630 states have call successors, (3285) [2022-12-14 05:50:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11539 states to 11539 states and 18202 transitions. [2022-12-14 05:50:18,734 INFO L78 Accepts]: Start accepts. Automaton has 11539 states and 18202 transitions. Word has length 80 [2022-12-14 05:50:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:18,734 INFO L495 AbstractCegarLoop]: Abstraction has 11539 states and 18202 transitions. [2022-12-14 05:50:18,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 05:50:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 11539 states and 18202 transitions. [2022-12-14 05:50:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 05:50:18,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:18,737 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1] [2022-12-14 05:50:18,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 05:50:18,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1543828953, now seen corresponding path program 1 times [2022-12-14 05:50:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:18,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193035860] [2022-12-14 05:50:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:50:18,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:18,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193035860] [2022-12-14 05:50:18,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193035860] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:18,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:18,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:50:18,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566153940] [2022-12-14 05:50:18,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:18,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:50:18,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:18,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:50:18,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:18,807 INFO L87 Difference]: Start difference. First operand 11539 states and 18202 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 05:50:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:19,868 INFO L93 Difference]: Finished difference Result 32661 states and 52194 transitions. [2022-12-14 05:50:19,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:50:19,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 81 [2022-12-14 05:50:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:19,932 INFO L225 Difference]: With dead ends: 32661 [2022-12-14 05:50:19,932 INFO L226 Difference]: Without dead ends: 21141 [2022-12-14 05:50:19,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:19,958 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 501 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:19,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1112 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21141 states. [2022-12-14 05:50:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21141 to 21050. [2022-12-14 05:50:21,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21050 states, 14789 states have (on average 1.514098316316181) internal successors, (22392), 15817 states have internal predecessors, (22392), 4787 states have call successors, (4787), 1093 states have call predecessors, (4787), 1473 states have return successors, (6359), 4461 states have call predecessors, (6359), 4782 states have call successors, (6359) [2022-12-14 05:50:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21050 states to 21050 states and 33538 transitions. [2022-12-14 05:50:21,233 INFO L78 Accepts]: Start accepts. Automaton has 21050 states and 33538 transitions. Word has length 81 [2022-12-14 05:50:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:21,233 INFO L495 AbstractCegarLoop]: Abstraction has 21050 states and 33538 transitions. [2022-12-14 05:50:21,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 05:50:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 21050 states and 33538 transitions. [2022-12-14 05:50:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 05:50:21,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:21,235 INFO L195 NwaCegarLoop]: 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] [2022-12-14 05:50:21,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 05:50:21,235 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:21,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:21,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1547102753, now seen corresponding path program 1 times [2022-12-14 05:50:21,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:21,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698452437] [2022-12-14 05:50:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:21,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:50:21,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:21,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698452437] [2022-12-14 05:50:21,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698452437] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:21,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:21,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:50:21,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351555435] [2022-12-14 05:50:21,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:21,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:50:21,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:50:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:21,297 INFO L87 Difference]: Start difference. First operand 21050 states and 33538 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 05:50:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:23,038 INFO L93 Difference]: Finished difference Result 61192 states and 99535 transitions. [2022-12-14 05:50:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:50:23,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 85 [2022-12-14 05:50:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:23,183 INFO L225 Difference]: With dead ends: 61192 [2022-12-14 05:50:23,183 INFO L226 Difference]: Without dead ends: 40165 [2022-12-14 05:50:23,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:23,242 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 500 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:23,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 1118 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40165 states. [2022-12-14 05:50:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40165 to 40073. [2022-12-14 05:50:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40073 states, 28180 states have (on average 1.5100780695528744) internal successors, (42554), 30160 states have internal predecessors, (42554), 9091 states have call successors, (9091), 2069 states have call predecessors, (9091), 2801 states have return successors, (13365), 8445 states have call predecessors, (13365), 9086 states have call successors, (13365) [2022-12-14 05:50:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40073 states to 40073 states and 65010 transitions. [2022-12-14 05:50:25,777 INFO L78 Accepts]: Start accepts. Automaton has 40073 states and 65010 transitions. Word has length 85 [2022-12-14 05:50:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:25,777 INFO L495 AbstractCegarLoop]: Abstraction has 40073 states and 65010 transitions. [2022-12-14 05:50:25,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 05:50:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 40073 states and 65010 transitions. [2022-12-14 05:50:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 05:50:25,779 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:25,779 INFO L195 NwaCegarLoop]: 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] [2022-12-14 05:50:25,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 05:50:25,779 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:25,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:25,779 INFO L85 PathProgramCache]: Analyzing trace with hash 715431362, now seen corresponding path program 1 times [2022-12-14 05:50:25,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:25,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749899531] [2022-12-14 05:50:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:25,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:50:25,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749899531] [2022-12-14 05:50:25,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749899531] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:25,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:25,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:50:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445216965] [2022-12-14 05:50:25,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:50:25,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:50:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:25,837 INFO L87 Difference]: Start difference. First operand 40073 states and 65010 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 05:50:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:27,619 INFO L93 Difference]: Finished difference Result 42544 states and 69312 transitions. [2022-12-14 05:50:27,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:50:27,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 86 [2022-12-14 05:50:27,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:27,782 INFO L225 Difference]: With dead ends: 42544 [2022-12-14 05:50:27,782 INFO L226 Difference]: Without dead ends: 42533 [2022-12-14 05:50:27,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:27,805 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 486 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:27,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1116 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42533 states. [2022-12-14 05:50:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42533 to 42446. [2022-12-14 05:50:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42446 states, 29850 states have (on average 1.5080067001675042) internal successors, (45014), 31949 states have internal predecessors, (45014), 9629 states have call successors, (9629), 2191 states have call predecessors, (9629), 2966 states have return successors, (14500), 8942 states have call predecessors, (14500), 9624 states have call successors, (14500) [2022-12-14 05:50:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42446 states to 42446 states and 69143 transitions. [2022-12-14 05:50:30,913 INFO L78 Accepts]: Start accepts. Automaton has 42446 states and 69143 transitions. Word has length 86 [2022-12-14 05:50:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:30,913 INFO L495 AbstractCegarLoop]: Abstraction has 42446 states and 69143 transitions. [2022-12-14 05:50:30,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 05:50:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 42446 states and 69143 transitions. [2022-12-14 05:50:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 05:50:30,918 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:30,918 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 05:50:30,919 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1651934724, now seen corresponding path program 1 times [2022-12-14 05:50:30,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:30,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725782970] [2022-12-14 05:50:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:30,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 05:50:31,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725782970] [2022-12-14 05:50:31,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725782970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292744313] [2022-12-14 05:50:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:31,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:31,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:31,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:31,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:50:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:31,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:50:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 05:50:31,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:31,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292744313] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:31,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:31,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-12-14 05:50:31,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112663816] [2022-12-14 05:50:31,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:31,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:50:31,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:31,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:50:31,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:50:31,662 INFO L87 Difference]: Start difference. First operand 42446 states and 69143 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:50:33,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:33,725 INFO L93 Difference]: Finished difference Result 86981 states and 145831 transitions. [2022-12-14 05:50:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:50:33,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 134 [2022-12-14 05:50:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:33,923 INFO L225 Difference]: With dead ends: 86981 [2022-12-14 05:50:33,923 INFO L226 Difference]: Without dead ends: 44552 [2022-12-14 05:50:34,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:50:34,051 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 213 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:34,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1287 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:50:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44552 states. [2022-12-14 05:50:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44552 to 44552. [2022-12-14 05:50:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44552 states, 31902 states have (on average 1.5345746348191336) internal successors, (48956), 34001 states have internal predecessors, (48956), 9629 states have call successors, (9629), 2245 states have call predecessors, (9629), 3020 states have return successors, (14500), 8942 states have call predecessors, (14500), 9624 states have call successors, (14500) [2022-12-14 05:50:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44552 states to 44552 states and 73085 transitions. [2022-12-14 05:50:36,189 INFO L78 Accepts]: Start accepts. Automaton has 44552 states and 73085 transitions. Word has length 134 [2022-12-14 05:50:36,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:36,190 INFO L495 AbstractCegarLoop]: Abstraction has 44552 states and 73085 transitions. [2022-12-14 05:50:36,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:50:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 44552 states and 73085 transitions. [2022-12-14 05:50:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 05:50:36,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:36,194 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:36,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:50:36,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:36,396 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:36,397 INFO L85 PathProgramCache]: Analyzing trace with hash -274614712, now seen corresponding path program 1 times [2022-12-14 05:50:36,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:36,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460478211] [2022-12-14 05:50:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:36,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 05:50:36,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:36,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460478211] [2022-12-14 05:50:36,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460478211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:36,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835135493] [2022-12-14 05:50:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:36,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:36,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:36,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:36,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:50:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:36,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:50:36,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 05:50:36,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:36,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835135493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:36,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:36,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 05:50:36,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425076369] [2022-12-14 05:50:36,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:36,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:50:36,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:36,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:50:36,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:50:36,875 INFO L87 Difference]: Start difference. First operand 44552 states and 73085 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:50:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:38,965 INFO L93 Difference]: Finished difference Result 91193 states and 153470 transitions. [2022-12-14 05:50:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:50:38,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 139 [2022-12-14 05:50:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:39,152 INFO L225 Difference]: With dead ends: 91193 [2022-12-14 05:50:39,152 INFO L226 Difference]: Without dead ends: 46658 [2022-12-14 05:50:39,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:50:39,294 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 211 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:39,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1287 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:39,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46658 states. [2022-12-14 05:50:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46658 to 46658. [2022-12-14 05:50:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46658 states, 33954 states have (on average 1.5579313188431407) internal successors, (52898), 36053 states have internal predecessors, (52898), 9629 states have call successors, (9629), 2299 states have call predecessors, (9629), 3074 states have return successors, (14500), 8942 states have call predecessors, (14500), 9624 states have call successors, (14500) [2022-12-14 05:50:41,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46658 states to 46658 states and 77027 transitions. [2022-12-14 05:50:41,896 INFO L78 Accepts]: Start accepts. Automaton has 46658 states and 77027 transitions. Word has length 139 [2022-12-14 05:50:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:41,897 INFO L495 AbstractCegarLoop]: Abstraction has 46658 states and 77027 transitions. [2022-12-14 05:50:41,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:50:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 46658 states and 77027 transitions. [2022-12-14 05:50:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 05:50:41,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:41,901 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:41,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:50:42,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:50:42,103 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash 319070104, now seen corresponding path program 1 times [2022-12-14 05:50:42,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:42,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321968288] [2022-12-14 05:50:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 05:50:42,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:42,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321968288] [2022-12-14 05:50:42,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321968288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:42,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004805389] [2022-12-14 05:50:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:42,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:42,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:42,250 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:42,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:50:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:42,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:50:42,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 05:50:42,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:42,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004805389] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:42,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:42,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 05:50:42,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644542935] [2022-12-14 05:50:42,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:42,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:50:42,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:50:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:50:42,551 INFO L87 Difference]: Start difference. First operand 46658 states and 77027 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:50:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:44,621 INFO L93 Difference]: Finished difference Result 95405 states and 161109 transitions. [2022-12-14 05:50:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:50:44,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 143 [2022-12-14 05:50:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:44,815 INFO L225 Difference]: With dead ends: 95405 [2022-12-14 05:50:44,815 INFO L226 Difference]: Without dead ends: 48764 [2022-12-14 05:50:44,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:50:44,949 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 209 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:44,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1287 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:44,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48764 states. [2022-12-14 05:50:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48764 to 48764. [2022-12-14 05:50:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48764 states, 36006 states have (on average 1.578625784591457) internal successors, (56840), 38105 states have internal predecessors, (56840), 9629 states have call successors, (9629), 2353 states have call predecessors, (9629), 3128 states have return successors, (14500), 8942 states have call predecessors, (14500), 9624 states have call successors, (14500) [2022-12-14 05:50:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48764 states to 48764 states and 80969 transitions. [2022-12-14 05:50:47,142 INFO L78 Accepts]: Start accepts. Automaton has 48764 states and 80969 transitions. Word has length 143 [2022-12-14 05:50:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:47,143 INFO L495 AbstractCegarLoop]: Abstraction has 48764 states and 80969 transitions. [2022-12-14 05:50:47,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:50:47,143 INFO L276 IsEmpty]: Start isEmpty. Operand 48764 states and 80969 transitions. [2022-12-14 05:50:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 05:50:47,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:47,147 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:47,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:50:47,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 05:50:47,348 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:47,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1870771842, now seen corresponding path program 1 times [2022-12-14 05:50:47,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:47,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482059759] [2022-12-14 05:50:47,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:47,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 05:50:47,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:47,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482059759] [2022-12-14 05:50:47,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482059759] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:47,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951696733] [2022-12-14 05:50:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:47,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:47,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:47,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:47,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:50:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:50:47,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 05:50:47,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:47,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951696733] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:47,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:47,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 05:50:47,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131359039] [2022-12-14 05:50:47,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:47,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:50:47,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:50:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:50:47,781 INFO L87 Difference]: Start difference. First operand 48764 states and 80969 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:50:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:49,847 INFO L93 Difference]: Finished difference Result 99617 states and 168748 transitions. [2022-12-14 05:50:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:50:49,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-12-14 05:50:49,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:50,042 INFO L225 Difference]: With dead ends: 99617 [2022-12-14 05:50:50,042 INFO L226 Difference]: Without dead ends: 50870 [2022-12-14 05:50:50,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:50:50,169 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 207 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:50,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1287 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50870 states. [2022-12-14 05:50:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50870 to 50870. [2022-12-14 05:50:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50870 states, 38058 states have (on average 1.597088654159441) internal successors, (60782), 40157 states have internal predecessors, (60782), 9629 states have call successors, (9629), 2407 states have call predecessors, (9629), 3182 states have return successors, (14500), 8942 states have call predecessors, (14500), 9624 states have call successors, (14500) [2022-12-14 05:50:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50870 states to 50870 states and 84911 transitions. [2022-12-14 05:50:52,399 INFO L78 Accepts]: Start accepts. Automaton has 50870 states and 84911 transitions. Word has length 146 [2022-12-14 05:50:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:52,400 INFO L495 AbstractCegarLoop]: Abstraction has 50870 states and 84911 transitions. [2022-12-14 05:50:52,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:50:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 50870 states and 84911 transitions. [2022-12-14 05:50:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 05:50:52,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:52,405 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:52,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:50:52,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:52,606 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1918232660, now seen corresponding path program 1 times [2022-12-14 05:50:52,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:52,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375122367] [2022-12-14 05:50:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:52,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 05:50:52,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:52,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375122367] [2022-12-14 05:50:52,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375122367] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:52,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391347426] [2022-12-14 05:50:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:52,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:52,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:52,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:52,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:50:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:50:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 05:50:53,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:53,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391347426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:53,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:53,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-12-14 05:50:53,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993968421] [2022-12-14 05:50:53,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:53,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:50:53,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:53,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:50:53,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:50:53,245 INFO L87 Difference]: Start difference. First operand 50870 states and 84911 transitions. Second operand has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:50:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:55,722 INFO L93 Difference]: Finished difference Result 101824 states and 170176 transitions. [2022-12-14 05:50:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:50:55,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 148 [2022-12-14 05:50:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:55,907 INFO L225 Difference]: With dead ends: 101824 [2022-12-14 05:50:55,907 INFO L226 Difference]: Without dead ends: 50986 [2022-12-14 05:50:56,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:50:56,024 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 298 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:56,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 2174 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:50:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50986 states. [2022-12-14 05:50:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50986 to 50890. [2022-12-14 05:50:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50890 states, 38068 states have (on average 1.5923347693600924) internal successors, (60617), 40177 states have internal predecessors, (60617), 9629 states have call successors, (9629), 2407 states have call predecessors, (9629), 3192 states have return successors, (14516), 8942 states have call predecessors, (14516), 9624 states have call successors, (14516) [2022-12-14 05:50:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50890 states to 50890 states and 84762 transitions. [2022-12-14 05:50:58,306 INFO L78 Accepts]: Start accepts. Automaton has 50890 states and 84762 transitions. Word has length 148 [2022-12-14 05:50:58,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:58,306 INFO L495 AbstractCegarLoop]: Abstraction has 50890 states and 84762 transitions. [2022-12-14 05:50:58,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:50:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 50890 states and 84762 transitions. [2022-12-14 05:50:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 05:50:58,312 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:58,313 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:58,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:50:58,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:50:58,514 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:58,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash -630097426, now seen corresponding path program 1 times [2022-12-14 05:50:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:58,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527738724] [2022-12-14 05:50:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:58,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 05:50:58,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:58,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527738724] [2022-12-14 05:50:58,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527738724] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:58,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674015025] [2022-12-14 05:50:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:58,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:58,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:58,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:58,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:50:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 05:50:59,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 05:50:59,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:59,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674015025] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:59,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:59,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2022-12-14 05:50:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182814516] [2022-12-14 05:50:59,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:59,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:50:59,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:50:59,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:50:59,213 INFO L87 Difference]: Start difference. First operand 50890 states and 84762 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-12-14 05:51:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:51:01,403 INFO L93 Difference]: Finished difference Result 51557 states and 86285 transitions. [2022-12-14 05:51:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:51:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 151 [2022-12-14 05:51:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:51:01,613 INFO L225 Difference]: With dead ends: 51557 [2022-12-14 05:51:01,613 INFO L226 Difference]: Without dead ends: 51471 [2022-12-14 05:51:01,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:51:01,650 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 480 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:51:01,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 828 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:51:01,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51471 states. [2022-12-14 05:51:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51471 to 50922. [2022-12-14 05:51:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50922 states, 38100 states have (on average 1.5918372703412074) internal successors, (60649), 40209 states have internal predecessors, (60649), 9629 states have call successors, (9629), 2407 states have call predecessors, (9629), 3192 states have return successors, (14516), 8942 states have call predecessors, (14516), 9624 states have call successors, (14516) [2022-12-14 05:51:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50922 states to 50922 states and 84794 transitions. [2022-12-14 05:51:04,066 INFO L78 Accepts]: Start accepts. Automaton has 50922 states and 84794 transitions. Word has length 151 [2022-12-14 05:51:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:51:04,067 INFO L495 AbstractCegarLoop]: Abstraction has 50922 states and 84794 transitions. [2022-12-14 05:51:04,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-12-14 05:51:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 50922 states and 84794 transitions. [2022-12-14 05:51:04,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:51:04,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:51:04,072 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:51:04,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 05:51:04,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:51:04,273 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:51:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:51:04,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2065613501, now seen corresponding path program 1 times [2022-12-14 05:51:04,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:51:04,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976860732] [2022-12-14 05:51:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:51:04,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:51:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:51:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 05:51:04,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:51:04,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976860732] [2022-12-14 05:51:04,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976860732] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:51:04,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034662650] [2022-12-14 05:51:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:51:04,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:51:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:51:04,513 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:51:04,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:51:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:51:04,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:51:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:51:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 05:51:04,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:51:04,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034662650] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:51:04,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:51:04,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-12-14 05:51:04,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197013859] [2022-12-14 05:51:04,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:51:04,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:51:04,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:51:04,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:51:04,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:51:04,884 INFO L87 Difference]: Start difference. First operand 50922 states and 84794 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 05:51:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:51:07,290 INFO L93 Difference]: Finished difference Result 56136 states and 96396 transitions. [2022-12-14 05:51:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:51:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 156 [2022-12-14 05:51:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:51:07,513 INFO L225 Difference]: With dead ends: 56136 [2022-12-14 05:51:07,513 INFO L226 Difference]: Without dead ends: 56050 [2022-12-14 05:51:07,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:51:07,551 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 464 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:51:07,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1952 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:51:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56050 states. [2022-12-14 05:51:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56050 to 54787. [2022-12-14 05:51:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54787 states, 40959 states have (on average 1.5812153617031666) internal successors, (64765), 43071 states have internal predecessors, (64765), 10309 states have call successors, (10309), 2747 states have call predecessors, (10309), 3518 states have return successors, (19414), 9605 states have call predecessors, (19414), 10304 states have call successors, (19414) [2022-12-14 05:51:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54787 states to 54787 states and 94488 transitions. [2022-12-14 05:51:10,369 INFO L78 Accepts]: Start accepts. Automaton has 54787 states and 94488 transitions. Word has length 156 [2022-12-14 05:51:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:51:10,369 INFO L495 AbstractCegarLoop]: Abstraction has 54787 states and 94488 transitions. [2022-12-14 05:51:10,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 05:51:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 54787 states and 94488 transitions. [2022-12-14 05:51:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 05:51:10,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:51:10,375 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:51:10,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:51:10,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:51:10,577 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:51:10,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:51:10,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1327257144, now seen corresponding path program 1 times [2022-12-14 05:51:10,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:51:10,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867892173] [2022-12-14 05:51:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:51:10,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:51:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:51:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 05:51:10,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:51:10,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867892173] [2022-12-14 05:51:10,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867892173] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:51:10,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880372514] [2022-12-14 05:51:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:51:10,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:51:10,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:51:10,847 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:51:10,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:51:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:51:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:51:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:51:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 05:51:11,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:51:11,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880372514] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:51:11,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:51:11,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 05:51:11,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973484921] [2022-12-14 05:51:11,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:51:11,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:51:11,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:51:11,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:51:11,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:51:11,086 INFO L87 Difference]: Start difference. First operand 54787 states and 94488 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-12-14 05:51:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:51:13,419 INFO L93 Difference]: Finished difference Result 56955 states and 105437 transitions. [2022-12-14 05:51:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:51:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 163 [2022-12-14 05:51:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:51:13,686 INFO L225 Difference]: With dead ends: 56955 [2022-12-14 05:51:13,686 INFO L226 Difference]: Without dead ends: 56869 [2022-12-14 05:51:13,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:51:13,734 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 47 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:51:13,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1564 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:51:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56869 states. [2022-12-14 05:51:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56869 to 55107. [2022-12-14 05:51:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55107 states, 41279 states have (on average 1.576709707114998) internal successors, (65085), 43391 states have internal predecessors, (65085), 10309 states have call successors, (10309), 2747 states have call predecessors, (10309), 3518 states have return successors, (19414), 9605 states have call predecessors, (19414), 10304 states have call successors, (19414) [2022-12-14 05:51:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55107 states to 55107 states and 94808 transitions. [2022-12-14 05:51:16,831 INFO L78 Accepts]: Start accepts. Automaton has 55107 states and 94808 transitions. Word has length 163 [2022-12-14 05:51:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:51:16,832 INFO L495 AbstractCegarLoop]: Abstraction has 55107 states and 94808 transitions. [2022-12-14 05:51:16,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-12-14 05:51:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 55107 states and 94808 transitions. [2022-12-14 05:51:16,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-12-14 05:51:16,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:51:16,837 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:51:16,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:51:17,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 05:51:17,039 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:51:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:51:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash 557286924, now seen corresponding path program 1 times [2022-12-14 05:51:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:51:17,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685590425] [2022-12-14 05:51:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:51:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:51:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:51:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-12-14 05:51:17,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:51:17,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685590425] [2022-12-14 05:51:17,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685590425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:51:17,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464986415] [2022-12-14 05:51:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:51:17,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:51:17,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:51:17,370 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:51:17,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:51:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:51:17,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:51:17,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:51:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2022-12-14 05:51:18,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:51:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2022-12-14 05:51:18,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464986415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:51:18,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767279617] [2022-12-14 05:51:18,320 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2022-12-14 05:51:18,320 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:51:18,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:51:18,326 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:51:18,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:51:26,635 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 420 for LOIs [2022-12-14 05:51:26,694 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 596 for LOIs [2022-12-14 05:53:46,364 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 721 for LOIs [2022-12-14 05:53:51,018 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 89 for LOIs [2022-12-14 05:53:51,026 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2022-12-14 05:53:54,368 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 591 for LOIs [2022-12-14 05:53:54,925 INFO L197 IcfgInterpreter]: Interpreting procedure isEmpty with input of size 29 for LOIs [2022-12-14 05:53:54,934 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 60 for LOIs [2022-12-14 05:53:54,940 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 519 for LOIs [2022-12-14 05:53:55,078 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__empty with input of size 197 for LOIs [2022-12-14 05:53:58,408 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 57 for LOIs [2022-12-14 05:53:58,420 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 93 for LOIs [2022-12-14 05:53:58,741 INFO L197 IcfgInterpreter]: Interpreting procedure enterElevator with input of size 63 for LOIs [2022-12-14 05:53:58,911 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 49 for LOIs [2022-12-14 05:53:58,922 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 48 for LOIs [2022-12-14 05:53:58,933 INFO L197 IcfgInterpreter]: Interpreting procedure pressInLiftFloorButton with input of size 77 for LOIs [2022-12-14 05:53:58,955 INFO L197 IcfgInterpreter]: Interpreting procedure removePersonFromFloor with input of size 157 for LOIs [2022-12-14 05:53:59,819 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 67 for LOIs [2022-12-14 05:53:59,836 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:55:25,995 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1883367#(and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 34) 2) 105) (= 32 (select (select |#memory_int| 34) 0)) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (= (select |#valid| 33) 1) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (<= ~currentFloorID~0 2147483647) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= ~head~0.offset 0) (= (select (select |#memory_int| 32) 3) 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select |#valid| 18) 1) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 37) 9) (not (= 0 ~floorButtons_spc9_1~0)) (= 97 (select (select |#memory_int| 19) 1)) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= ~doorState~0 1) (= 0 ~floorButtons_spc9_0~0) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= 4 (select |#length| 18)) (= ~head~0.base 0) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= ~blocked~0 0) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= 112 (select (select |#memory_int| 30) 3)) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 36) 0) 10) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select (select |#memory_int| 35) 2) 105) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 32) 0)))' at error location [2022-12-14 05:55:25,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:55:25,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:55:25,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 17 [2022-12-14 05:55:25,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155205352] [2022-12-14 05:55:25,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:55:25,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:55:25,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:55:25,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:55:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=882, Invalid=13160, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 05:55:25,999 INFO L87 Difference]: Start difference. First operand 55107 states and 94808 transitions. Second operand has 17 states, 17 states have (on average 13.823529411764707) internal successors, (235), 17 states have internal predecessors, (235), 10 states have call successors, (70), 4 states have call predecessors, (70), 6 states have return successors, (69), 10 states have call predecessors, (69), 9 states have call successors, (69) [2022-12-14 05:55:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:55:34,538 INFO L93 Difference]: Finished difference Result 140236 states and 281262 transitions. [2022-12-14 05:55:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 05:55:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 13.823529411764707) internal successors, (235), 17 states have internal predecessors, (235), 10 states have call successors, (70), 4 states have call predecessors, (70), 6 states have return successors, (69), 10 states have call predecessors, (69), 9 states have call successors, (69) Word has length 264 [2022-12-14 05:55:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:55:34,988 INFO L225 Difference]: With dead ends: 140236 [2022-12-14 05:55:34,988 INFO L226 Difference]: Without dead ends: 82284 [2022-12-14 05:55:35,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 677 SyntacticMatches, 20 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9446 ImplicationChecksByTransitivity, 87.2s TimeCoverageRelationStatistics Valid=1205, Invalid=19675, Unknown=0, NotChecked=0, Total=20880 [2022-12-14 05:55:35,212 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 2653 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 7775 mSolverCounterSat, 1414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2660 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 9189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1414 IncrementalHoareTripleChecker+Valid, 7775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:55:35,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2660 Valid, 2862 Invalid, 9189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1414 Valid, 7775 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 05:55:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82284 states. [2022-12-14 05:55:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82284 to 74618. [2022-12-14 05:55:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74618 states, 55246 states have (on average 1.5314411903124208) internal successors, (84606), 58189 states have internal predecessors, (84606), 14771 states have call successors, (14771), 3295 states have call predecessors, (14771), 4600 states have return successors, (36037), 13806 states have call predecessors, (36037), 14766 states have call successors, (36037) [2022-12-14 05:55:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74618 states to 74618 states and 135414 transitions. [2022-12-14 05:55:40,092 INFO L78 Accepts]: Start accepts. Automaton has 74618 states and 135414 transitions. Word has length 264 [2022-12-14 05:55:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:55:40,092 INFO L495 AbstractCegarLoop]: Abstraction has 74618 states and 135414 transitions. [2022-12-14 05:55:40,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.823529411764707) internal successors, (235), 17 states have internal predecessors, (235), 10 states have call successors, (70), 4 states have call predecessors, (70), 6 states have return successors, (69), 10 states have call predecessors, (69), 9 states have call successors, (69) [2022-12-14 05:55:40,092 INFO L276 IsEmpty]: Start isEmpty. Operand 74618 states and 135414 transitions. [2022-12-14 05:55:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 05:55:40,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:55:40,105 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:55:40,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:55:40,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:55:40,308 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:55:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:55:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash -515721918, now seen corresponding path program 1 times [2022-12-14 05:55:40,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:55:40,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448846907] [2022-12-14 05:55:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:55:40,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:55:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:55:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 05:55:40,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:55:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448846907] [2022-12-14 05:55:40,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448846907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:55:40,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:55:40,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:55:40,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522097922] [2022-12-14 05:55:40,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:55:40,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:55:40,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:55:40,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:55:40,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:55:40,524 INFO L87 Difference]: Start difference. First operand 74618 states and 135414 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 05:55:44,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:55:44,468 INFO L93 Difference]: Finished difference Result 152604 states and 289134 transitions. [2022-12-14 05:55:44,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:55:44,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 186 [2022-12-14 05:55:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:55:44,801 INFO L225 Difference]: With dead ends: 152604 [2022-12-14 05:55:44,801 INFO L226 Difference]: Without dead ends: 77120 [2022-12-14 05:55:45,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:55:45,071 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 99 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:55:45,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1300 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:55:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77120 states. [2022-12-14 05:55:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77120 to 77120. [2022-12-14 05:55:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77120 states, 57622 states have (on average 1.493908576585332) internal successors, (86082), 60601 states have internal predecessors, (86082), 14771 states have call successors, (14771), 3385 states have call predecessors, (14771), 4726 states have return successors, (36037), 13806 states have call predecessors, (36037), 14766 states have call successors, (36037) [2022-12-14 05:55:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77120 states to 77120 states and 136890 transitions. [2022-12-14 05:55:50,446 INFO L78 Accepts]: Start accepts. Automaton has 77120 states and 136890 transitions. Word has length 186 [2022-12-14 05:55:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:55:50,446 INFO L495 AbstractCegarLoop]: Abstraction has 77120 states and 136890 transitions. [2022-12-14 05:55:50,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 05:55:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 77120 states and 136890 transitions. [2022-12-14 05:55:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-12-14 05:55:50,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:55:50,468 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:55:50,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 05:55:50,469 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:55:50,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:55:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1806036584, now seen corresponding path program 1 times [2022-12-14 05:55:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:55:50,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261732230] [2022-12-14 05:55:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:55:50,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:55:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:55:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-12-14 05:55:51,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:55:51,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261732230] [2022-12-14 05:55:51,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261732230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:55:51,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294728441] [2022-12-14 05:55:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:55:51,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:55:51,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:55:51,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:55:51,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4ff0692-682d-40a0-bb26-378b106b57f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:55:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:55:51,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 2170 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 05:55:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:55:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-12-14 05:55:52,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:55:54,033 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 05:56:00,282 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 05:56:00,615 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 05:56:06,720 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 05:56:06,871 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 05:58:35,997 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-12-14 05:58:36,385 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 05:58:44,007 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.