./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/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_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/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_551a7677-7a1a-44d5-ab47-a08aba998c40/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 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 --- 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 05:46:46,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:46:46,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:46:46,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:46:46,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:46:46,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:46:46,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:46:46,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:46:46,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:46:46,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:46:46,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:46:46,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:46:46,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:46:46,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:46:46,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:46:46,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:46:46,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:46:46,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:46:46,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:46:46,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:46:46,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:46:46,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:46:46,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:46:46,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:46:46,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:46:46,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:46:46,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:46:46,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:46:46,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:46:46,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:46:46,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:46:46,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:46:46,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:46:46,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:46:46,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:46:46,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:46:46,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:46:46,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:46:46,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:46:46,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:46:46,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:46:46,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:46:46,606 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:46:46,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:46:46,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:46:46,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:46:46,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:46:46,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:46:46,607 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:46:46,607 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:46:46,607 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:46:46,607 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:46:46,607 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:46:46,607 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:46:46,607 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:46:46,607 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:46:46,608 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:46:46,608 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:46:46,608 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:46:46,608 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:46:46,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:46:46,608 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:46:46,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:46:46,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:46:46,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:46:46,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:46:46,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:46:46,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:46:46,609 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:46:46,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:46:46,609 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:46:46,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:46:46,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:46:46,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:46:46,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:46:46,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:46:46,610 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:46:46,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:46:46,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:46:46,610 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:46:46,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:46:46,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:46:46,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:46:46,611 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 [2022-12-14 05:46:46,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:46:46,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:46:46,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:46:46,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:46:46,834 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:46:46,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2022-12-14 05:46:49,362 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:46:49,606 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:46:49,607 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2022-12-14 05:46:49,622 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/data/463bc0c57/eeb68adfac7c45b0b32000ede561aae8/FLAG0fe065be7 [2022-12-14 05:46:49,915 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/data/463bc0c57/eeb68adfac7c45b0b32000ede561aae8 [2022-12-14 05:46:49,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:46:49,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:46:49,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:46:49,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:46:49,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:46:49,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:46:49" (1/1) ... [2022-12-14 05:46:49,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ace83a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:49, skipping insertion in model container [2022-12-14 05:46:49,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:46:49" (1/1) ... [2022-12-14 05:46:49,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:46:49,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:46:50,344 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_551a7677-7a1a-44d5-ab47-a08aba998c40/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2022-12-14 05:46:50,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:46:50,389 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:46:50,446 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_551a7677-7a1a-44d5-ab47-a08aba998c40/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2022-12-14 05:46:50,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:46:50,476 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:46:50,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50 WrapperNode [2022-12-14 05:46:50,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:46:50,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:46:50,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:46:50,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:46:50,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,534 INFO L138 Inliner]: procedures = 90, calls = 345, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 884 [2022-12-14 05:46:50,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:46:50,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:46:50,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:46:50,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:46:50,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,571 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:46:50,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:46:50,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:46:50,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:46:50,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (1/1) ... [2022-12-14 05:46:50,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:46:50,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:46:50,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:46:50,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:46:50,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:46:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 05:46:50,645 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 05:46:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 05:46:50,645 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 05:46:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 05:46:50,645 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 05:46:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 05:46:50,646 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 05:46:50,646 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 05:46:50,646 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 05:46:50,646 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 05:46:50,646 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 05:46:50,646 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 05:46:50,646 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 05:46:50,647 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 05:46:50,647 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 05:46:50,647 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 05:46:50,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 05:46:50,647 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 05:46:50,647 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 05:46:50,647 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 05:46:50,647 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 05:46:50,648 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 05:46:50,648 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 05:46:50,648 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 05:46:50,648 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 05:46:50,648 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 05:46:50,648 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 05:46:50,648 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 05:46:50,649 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 05:46:50,649 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 05:46:50,649 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 05:46:50,649 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 05:46:50,649 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 05:46:50,649 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 05:46:50,649 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 05:46:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 05:46:50,650 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 05:46:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 05:46:50,650 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 05:46:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:46:50,650 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 05:46:50,650 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 05:46:50,651 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 05:46:50,651 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 05:46:50,651 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 05:46:50,651 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 05:46:50,651 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 05:46:50,651 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 05:46:50,651 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 05:46:50,651 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 05:46:50,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:46:50,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:46:50,652 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 05:46:50,652 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 05:46:50,771 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:46:50,773 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:46:51,537 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:46:51,981 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:46:51,981 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 05:46:51,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:46:51 BoogieIcfgContainer [2022-12-14 05:46:51,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:46:51,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:46:51,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:46:51,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:46:51,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:46:49" (1/3) ... [2022-12-14 05:46:51,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac848f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:46:51, skipping insertion in model container [2022-12-14 05:46:51,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:46:50" (2/3) ... [2022-12-14 05:46:51,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac848f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:46:51, skipping insertion in model container [2022-12-14 05:46:51,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:46:51" (3/3) ... [2022-12-14 05:46:51,992 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product21.cil.c [2022-12-14 05:46:52,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:46:52,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:46:52,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:46:52,070 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;@311d72c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:46:52,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:46:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-12-14 05:46:52,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 05:46:52,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:46:52,087 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 05:46:52,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:46:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:46:52,092 INFO L85 PathProgramCache]: Analyzing trace with hash 908881129, now seen corresponding path program 1 times [2022-12-14 05:46:52,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:46:52,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804816524] [2022-12-14 05:46:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:52,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:46:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:52,610 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 05:46:52,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:46:52,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804816524] [2022-12-14 05:46:52,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804816524] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:46:52,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:46:52,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:46:52,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934716772] [2022-12-14 05:46:52,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:46:52,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:46:52,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:46:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:46:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:46:52,641 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 05:46:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:46:53,470 INFO L93 Difference]: Finished difference Result 1150 states and 1839 transitions. [2022-12-14 05:46:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:46:53,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-12-14 05:46:53,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:46:53,487 INFO L225 Difference]: With dead ends: 1150 [2022-12-14 05:46:53,487 INFO L226 Difference]: Without dead ends: 748 [2022-12-14 05:46:53,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:46:53,497 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 546 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:46:53,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 2990 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:46:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-12-14 05:46:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 740. [2022-12-14 05:46:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 497 states have (on average 1.5010060362173039) internal successors, (746), 527 states have internal predecessors, (746), 196 states have call successors, (196), 49 states have call predecessors, (196), 46 states have return successors, (197), 188 states have call predecessors, (197), 192 states have call successors, (197) [2022-12-14 05:46:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1139 transitions. [2022-12-14 05:46:53,605 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1139 transitions. Word has length 75 [2022-12-14 05:46:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:46:53,606 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1139 transitions. [2022-12-14 05:46:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 05:46:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1139 transitions. [2022-12-14 05:46:53,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 05:46:53,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:46:53,611 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, 1, 1, 1, 1, 1] [2022-12-14 05:46:53,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:46:53,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:46:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:46:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash 241130024, now seen corresponding path program 1 times [2022-12-14 05:46:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:46:53,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754070668] [2022-12-14 05:46:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:46:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:53,953 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 05:46:53,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:46:53,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754070668] [2022-12-14 05:46:53,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754070668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:46:53,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:46:53,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:46:53,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761551691] [2022-12-14 05:46:53,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:46:53,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:46:53,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:46:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:46:53,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:46:53,956 INFO L87 Difference]: Start difference. First operand 740 states and 1139 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 05:46:54,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:46:54,797 INFO L93 Difference]: Finished difference Result 2669 states and 4283 transitions. [2022-12-14 05:46:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:46:54,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 80 [2022-12-14 05:46:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:46:54,812 INFO L225 Difference]: With dead ends: 2669 [2022-12-14 05:46:54,812 INFO L226 Difference]: Without dead ends: 1941 [2022-12-14 05:46:54,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:46:54,820 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 847 mSDsluCounter, 3114 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 4034 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:46:54,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 4034 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:46:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-12-14 05:46:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1387. [2022-12-14 05:46:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 949 states have (on average 1.5047418335089568) internal successors, (1428), 1007 states have internal predecessors, (1428), 351 states have call successors, (351), 91 states have call predecessors, (351), 86 states have return successors, (380), 326 states have call predecessors, (380), 345 states have call successors, (380) [2022-12-14 05:46:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2159 transitions. [2022-12-14 05:46:54,918 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2159 transitions. Word has length 80 [2022-12-14 05:46:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:46:54,918 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 2159 transitions. [2022-12-14 05:46:54,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 05:46:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2159 transitions. [2022-12-14 05:46:54,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 05:46:54,920 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:46:54,920 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, 1, 1, 1, 1] [2022-12-14 05:46:54,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:46:54,920 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:46:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:46:54,921 INFO L85 PathProgramCache]: Analyzing trace with hash 860792901, now seen corresponding path program 1 times [2022-12-14 05:46:54,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:46:54,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531045851] [2022-12-14 05:46:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:54,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:46:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:46:55,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:46:55,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531045851] [2022-12-14 05:46:55,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531045851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:46:55,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171216804] [2022-12-14 05:46:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:55,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:46:55,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:46:55,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:46:55,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:46:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:46:55,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:46:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:46:55,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:46:55,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171216804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:46:55,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:46:55,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:46:55,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265578647] [2022-12-14 05:46:55,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:46:55,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:46:55,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:46:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:46:55,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:46:55,549 INFO L87 Difference]: Start difference. First operand 1387 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 05:46:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:46:55,811 INFO L93 Difference]: Finished difference Result 3959 states and 6319 transitions. [2022-12-14 05:46:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:46:55,811 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), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2022-12-14 05:46:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:46:55,828 INFO L225 Difference]: With dead ends: 3959 [2022-12-14 05:46:55,828 INFO L226 Difference]: Without dead ends: 2584 [2022-12-14 05:46:55,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:46:55,840 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 562 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:46:55,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:46:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-12-14 05:46:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2509. [2022-12-14 05:46:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1727 states have (on average 1.5176606832657789) internal successors, (2621), 1843 states have internal predecessors, (2621), 620 states have call successors, (620), 162 states have call predecessors, (620), 161 states have return successors, (700), 579 states have call predecessors, (700), 614 states have call successors, (700) [2022-12-14 05:46:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3941 transitions. [2022-12-14 05:46:55,948 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3941 transitions. Word has length 79 [2022-12-14 05:46:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:46:55,949 INFO L495 AbstractCegarLoop]: Abstraction has 2509 states and 3941 transitions. [2022-12-14 05:46:55,949 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), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 05:46:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3941 transitions. [2022-12-14 05:46:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 05:46:55,951 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:46:55,951 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, 1, 1, 1, 1, 1, 1] [2022-12-14 05:46:55,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:46:56,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:46:56,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:46:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:46:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash -904187507, now seen corresponding path program 1 times [2022-12-14 05:46:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:46:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575344673] [2022-12-14 05:46:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:56,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:46:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:46:56,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:46:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575344673] [2022-12-14 05:46:56,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575344673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:46:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041811204] [2022-12-14 05:46:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:56,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:46:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:46:56,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:46:56,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:46:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:56,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:46:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:46:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:46:56,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:46:56,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041811204] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:46:56,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:46:56,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:46:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210798061] [2022-12-14 05:46:56,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:46:56,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:46:56,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:46:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:46:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:46:56,714 INFO L87 Difference]: Start difference. First operand 2509 states and 3941 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 05:46:57,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:46:57,000 INFO L93 Difference]: Finished difference Result 5622 states and 8926 transitions. [2022-12-14 05:46:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:46:57,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2022-12-14 05:46:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:46:57,020 INFO L225 Difference]: With dead ends: 5622 [2022-12-14 05:46:57,020 INFO L226 Difference]: Without dead ends: 3125 [2022-12-14 05:46:57,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:46:57,038 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 559 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:46:57,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1173 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:46:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2022-12-14 05:46:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3082. [2022-12-14 05:46:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 2129 states have (on average 1.5274776890558948) internal successors, (3252), 2274 states have internal predecessors, (3252), 755 states have call successors, (755), 196 states have call predecessors, (755), 197 states have return successors, (854), 707 states have call predecessors, (854), 749 states have call successors, (854) [2022-12-14 05:46:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4861 transitions. [2022-12-14 05:46:57,197 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4861 transitions. Word has length 81 [2022-12-14 05:46:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:46:57,198 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 4861 transitions. [2022-12-14 05:46:57,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 05:46:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4861 transitions. [2022-12-14 05:46:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 05:46:57,200 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:46:57,200 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, 1, 1, 1, 1, 1, 1] [2022-12-14 05:46:57,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:46:57,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:46:57,401 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:46:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:46:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1566525700, now seen corresponding path program 1 times [2022-12-14 05:46:57,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:46:57,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015962269] [2022-12-14 05:46:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:57,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:46:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:46:57,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:46:57,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015962269] [2022-12-14 05:46:57,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015962269] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:46:57,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029418087] [2022-12-14 05:46:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:57,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:46:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:46:57,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:46:57,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:46:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:58,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:46:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:46:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:46:58,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:46:58,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029418087] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:46:58,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:46:58,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-12-14 05:46:58,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911235120] [2022-12-14 05:46:58,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:46:58,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:46:58,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:46:58,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:46:58,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:46:58,060 INFO L87 Difference]: Start difference. First operand 3082 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 05:46:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:46:58,466 INFO L93 Difference]: Finished difference Result 6167 states and 9944 transitions. [2022-12-14 05:46:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:46:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2022-12-14 05:46:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:46:58,511 INFO L225 Difference]: With dead ends: 6167 [2022-12-14 05:46:58,512 INFO L226 Difference]: Without dead ends: 3902 [2022-12-14 05:46:58,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:46:58,526 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 210 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:46:58,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2430 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:46:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-12-14 05:46:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3286. [2022-12-14 05:46:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2271 states have (on average 1.520035226772347) internal successors, (3452), 2437 states have internal predecessors, (3452), 814 states have call successors, (814), 196 states have call predecessors, (814), 200 states have return successors, (925), 766 states have call predecessors, (925), 808 states have call successors, (925) [2022-12-14 05:46:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 5191 transitions. [2022-12-14 05:46:58,748 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 5191 transitions. Word has length 87 [2022-12-14 05:46:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:46:58,748 INFO L495 AbstractCegarLoop]: Abstraction has 3286 states and 5191 transitions. [2022-12-14 05:46:58,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 05:46:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 5191 transitions. [2022-12-14 05:46:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 05:46:58,751 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:46:58,751 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 05:46:58,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:46:58,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:46:58,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:46:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:46:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash 127368693, now seen corresponding path program 1 times [2022-12-14 05:46:58,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:46:58,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416376636] [2022-12-14 05:46:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:58,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:46:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:46:59,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:46:59,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416376636] [2022-12-14 05:46:59,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416376636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:46:59,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721904230] [2022-12-14 05:46:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:59,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:46:59,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:46:59,422 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:46:59,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:46:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:59,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:46:59,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:46:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:46:59,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:46:59,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721904230] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:46:59,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:46:59,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 05:46:59,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917283823] [2022-12-14 05:46:59,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:46:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:46:59,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:46:59,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:46:59,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:46:59,849 INFO L87 Difference]: Start difference. First operand 3286 states and 5191 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 05:47:00,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:00,654 INFO L93 Difference]: Finished difference Result 5778 states and 9149 transitions. [2022-12-14 05:47:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:47:00,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2022-12-14 05:47:00,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:00,670 INFO L225 Difference]: With dead ends: 5778 [2022-12-14 05:47:00,670 INFO L226 Difference]: Without dead ends: 3325 [2022-12-14 05:47:00,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:47:00,682 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 509 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:00,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 2356 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:47:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2022-12-14 05:47:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3322. [2022-12-14 05:47:00,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 2295 states have (on average 1.5145969498910676) internal successors, (3476), 2457 states have internal predecessors, (3476), 814 states have call successors, (814), 200 states have call predecessors, (814), 212 states have return successors, (941), 778 states have call predecessors, (941), 808 states have call successors, (941) [2022-12-14 05:47:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5231 transitions. [2022-12-14 05:47:00,817 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5231 transitions. Word has length 89 [2022-12-14 05:47:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:00,817 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 5231 transitions. [2022-12-14 05:47:00,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 05:47:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5231 transitions. [2022-12-14 05:47:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 05:47:00,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:00,820 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 05:47:00,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:47:01,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 05:47:01,021 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2059052675, now seen corresponding path program 1 times [2022-12-14 05:47:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:01,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593411147] [2022-12-14 05:47:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:01,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:47:01,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:01,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593411147] [2022-12-14 05:47:01,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593411147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:01,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731168290] [2022-12-14 05:47:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:01,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:01,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:01,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:47:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:01,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:47:01,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:47:01,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:01,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731168290] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:01,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:01,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-12-14 05:47:01,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413627004] [2022-12-14 05:47:01,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:01,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:47:01,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:01,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:47:01,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:47:01,609 INFO L87 Difference]: Start difference. First operand 3322 states and 5231 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 05:47:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:01,899 INFO L93 Difference]: Finished difference Result 6163 states and 9951 transitions. [2022-12-14 05:47:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:47:01,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2022-12-14 05:47:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:01,914 INFO L225 Difference]: With dead ends: 6163 [2022-12-14 05:47:01,914 INFO L226 Difference]: Without dead ends: 3674 [2022-12-14 05:47:01,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:47:01,926 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 219 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:01,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1594 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:47:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2022-12-14 05:47:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2022-12-14 05:47:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 2637 states have (on average 1.5297686765263556) internal successors, (4034), 2809 states have internal predecessors, (4034), 814 states have call successors, (814), 200 states have call predecessors, (814), 222 states have return successors, (971), 778 states have call predecessors, (971), 808 states have call successors, (971) [2022-12-14 05:47:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5819 transitions. [2022-12-14 05:47:02,072 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5819 transitions. Word has length 92 [2022-12-14 05:47:02,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:02,072 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5819 transitions. [2022-12-14 05:47:02,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 05:47:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5819 transitions. [2022-12-14 05:47:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 05:47:02,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:02,074 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 05:47:02,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:47:02,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:02,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1021652037, now seen corresponding path program 1 times [2022-12-14 05:47:02,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:02,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559718532] [2022-12-14 05:47:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:02,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:47:02,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:02,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559718532] [2022-12-14 05:47:02,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559718532] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:02,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748418691] [2022-12-14 05:47:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:02,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:02,702 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:02,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:47:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:02,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:47:02,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:47:03,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:47:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 05:47:03,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748418691] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:03,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:47:03,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-12-14 05:47:03,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966762163] [2022-12-14 05:47:03,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:03,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 05:47:03,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:03,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 05:47:03,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:47:03,292 INFO L87 Difference]: Start difference. First operand 3674 states and 5819 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 05:47:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:05,861 INFO L93 Difference]: Finished difference Result 9688 states and 16293 transitions. [2022-12-14 05:47:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 05:47:05,862 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2022-12-14 05:47:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:05,896 INFO L225 Difference]: With dead ends: 9688 [2022-12-14 05:47:05,896 INFO L226 Difference]: Without dead ends: 7335 [2022-12-14 05:47:05,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 05:47:05,937 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 2577 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2665 SdHoareTripleChecker+Valid, 3110 SdHoareTripleChecker+Invalid, 3938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:05,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2665 Valid, 3110 Invalid, 3938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1229 Valid, 2709 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 05:47:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2022-12-14 05:47:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 6840. [2022-12-14 05:47:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5049 states have (on average 1.5444642503466033) internal successors, (7798), 5313 states have internal predecessors, (7798), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 445 states have return successors, (1996), 1292 states have call predecessors, (1996), 1337 states have call successors, (1996) [2022-12-14 05:47:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 11139 transitions. [2022-12-14 05:47:06,423 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 11139 transitions. Word has length 92 [2022-12-14 05:47:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:06,423 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 11139 transitions. [2022-12-14 05:47:06,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 05:47:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 11139 transitions. [2022-12-14 05:47:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 05:47:06,427 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:06,427 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 05:47:06,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:47:06,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:06,629 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1729821628, now seen corresponding path program 1 times [2022-12-14 05:47:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:06,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481813511] [2022-12-14 05:47:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:06,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:47:07,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:07,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481813511] [2022-12-14 05:47:07,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481813511] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:07,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447887134] [2022-12-14 05:47:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:07,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:07,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:07,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:07,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:47:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:07,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:47:07,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:47:07,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:07,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447887134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:07,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:07,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-12-14 05:47:07,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612178840] [2022-12-14 05:47:07,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:07,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:47:07,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:07,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:47:07,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:47:07,414 INFO L87 Difference]: Start difference. First operand 6840 states and 11139 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 05:47:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:08,158 INFO L93 Difference]: Finished difference Result 12375 states and 20284 transitions. [2022-12-14 05:47:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:47:08,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2022-12-14 05:47:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:08,196 INFO L225 Difference]: With dead ends: 12375 [2022-12-14 05:47:08,196 INFO L226 Difference]: Without dead ends: 6856 [2022-12-14 05:47:08,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:47:08,212 INFO L413 NwaCegarLoop]: 738 mSDtfsCounter, 420 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:08,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 2610 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:47:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6856 states. [2022-12-14 05:47:08,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6856 to 6840. [2022-12-14 05:47:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5049 states have (on average 1.5444642503466033) internal successors, (7798), 5313 states have internal predecessors, (7798), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 445 states have return successors, (1988), 1292 states have call predecessors, (1988), 1337 states have call successors, (1988) [2022-12-14 05:47:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 11131 transitions. [2022-12-14 05:47:08,509 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 11131 transitions. Word has length 95 [2022-12-14 05:47:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:08,510 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 11131 transitions. [2022-12-14 05:47:08,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 05:47:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 11131 transitions. [2022-12-14 05:47:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 05:47:08,512 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:08,512 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:47:08,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:47:08,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:08,713 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:08,713 INFO L85 PathProgramCache]: Analyzing trace with hash -205032273, now seen corresponding path program 1 times [2022-12-14 05:47:08,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:08,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428680264] [2022-12-14 05:47:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:08,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 05:47:09,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:09,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428680264] [2022-12-14 05:47:09,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428680264] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:09,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141086792] [2022-12-14 05:47:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:09,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:09,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:09,041 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:09,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:47:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:09,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:47:09,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:47:09,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:09,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141086792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:09,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:09,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 05:47:09,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137392060] [2022-12-14 05:47:09,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:09,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:47:09,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:47:09,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:47:09,332 INFO L87 Difference]: Start difference. First operand 6840 states and 11131 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 05:47:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:09,780 INFO L93 Difference]: Finished difference Result 13215 states and 22058 transitions. [2022-12-14 05:47:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:47:09,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 125 [2022-12-14 05:47:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:09,810 INFO L225 Difference]: With dead ends: 13215 [2022-12-14 05:47:09,810 INFO L226 Difference]: Without dead ends: 7220 [2022-12-14 05:47:09,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:47:09,835 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 13 mSDsluCounter, 2983 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:09,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3588 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:47:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7220 states. [2022-12-14 05:47:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7220 to 7068. [2022-12-14 05:47:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 5193 states have (on average 1.5293664548430579) internal successors, (7942), 5497 states have internal predecessors, (7942), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 529 states have return successors, (2453), 1336 states have call predecessors, (2453), 1337 states have call successors, (2453) [2022-12-14 05:47:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 11740 transitions. [2022-12-14 05:47:10,165 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 11740 transitions. Word has length 125 [2022-12-14 05:47:10,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:10,165 INFO L495 AbstractCegarLoop]: Abstraction has 7068 states and 11740 transitions. [2022-12-14 05:47:10,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 05:47:10,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 11740 transitions. [2022-12-14 05:47:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 05:47:10,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:10,169 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 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 05:47:10,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 05:47:10,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:10,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:10,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:10,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1266995063, now seen corresponding path program 1 times [2022-12-14 05:47:10,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:10,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120218750] [2022-12-14 05:47:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:10,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 05:47:10,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:10,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120218750] [2022-12-14 05:47:10,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120218750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:10,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797815540] [2022-12-14 05:47:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:10,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:10,724 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:10,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:47:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:10,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:47:10,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 05:47:11,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:11,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797815540] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:11,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:11,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 05:47:11,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800505510] [2022-12-14 05:47:11,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:11,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:47:11,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:11,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:47:11,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:47:11,038 INFO L87 Difference]: Start difference. First operand 7068 states and 11740 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 05:47:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:11,520 INFO L93 Difference]: Finished difference Result 13551 states and 22861 transitions. [2022-12-14 05:47:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:47:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 121 [2022-12-14 05:47:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:11,546 INFO L225 Difference]: With dead ends: 13551 [2022-12-14 05:47:11,546 INFO L226 Difference]: Without dead ends: 7336 [2022-12-14 05:47:11,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:47:11,567 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 13 mSDsluCounter, 3033 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3650 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:11,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3650 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:47:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2022-12-14 05:47:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 7096. [2022-12-14 05:47:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7096 states, 5221 states have (on average 1.5265274851561004) internal successors, (7970), 5497 states have internal predecessors, (7970), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 529 states have return successors, (2453), 1364 states have call predecessors, (2453), 1337 states have call successors, (2453) [2022-12-14 05:47:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 11768 transitions. [2022-12-14 05:47:11,929 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 11768 transitions. Word has length 121 [2022-12-14 05:47:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:11,929 INFO L495 AbstractCegarLoop]: Abstraction has 7096 states and 11768 transitions. [2022-12-14 05:47:11,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 05:47:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 11768 transitions. [2022-12-14 05:47:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 05:47:11,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:11,934 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 05:47:11,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:47:12,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:12,134 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash 528775829, now seen corresponding path program 1 times [2022-12-14 05:47:12,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:12,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384709308] [2022-12-14 05:47:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:12,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 05:47:12,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384709308] [2022-12-14 05:47:12,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384709308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710036246] [2022-12-14 05:47:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:12,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:12,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:12,464 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:12,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:47:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:47:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 05:47:12,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:12,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710036246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:12,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:12,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-12-14 05:47:12,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072452314] [2022-12-14 05:47:12,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:12,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:47:12,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:47:12,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:47:12,704 INFO L87 Difference]: Start difference. First operand 7096 states and 11768 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:47:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:13,135 INFO L93 Difference]: Finished difference Result 14754 states and 25979 transitions. [2022-12-14 05:47:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:47:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 124 [2022-12-14 05:47:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:13,170 INFO L225 Difference]: With dead ends: 14754 [2022-12-14 05:47:13,170 INFO L226 Difference]: Without dead ends: 8491 [2022-12-14 05:47:13,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:47:13,201 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 71 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:13,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1221 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:47:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8491 states. [2022-12-14 05:47:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8491 to 8026. [2022-12-14 05:47:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 6064 states have (on average 1.524571240105541) internal successors, (9245), 6340 states have internal predecessors, (9245), 1432 states have call successors, (1432), 378 states have call predecessors, (1432), 529 states have return successors, (2540), 1451 states have call predecessors, (2540), 1424 states have call successors, (2540) [2022-12-14 05:47:13,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 13217 transitions. [2022-12-14 05:47:13,562 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 13217 transitions. Word has length 124 [2022-12-14 05:47:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:13,563 INFO L495 AbstractCegarLoop]: Abstraction has 8026 states and 13217 transitions. [2022-12-14 05:47:13,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:47:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 13217 transitions. [2022-12-14 05:47:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 05:47:13,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:13,566 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 05:47:13,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:47:13,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:13,767 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1955906811, now seen corresponding path program 1 times [2022-12-14 05:47:13,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:13,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381179414] [2022-12-14 05:47:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:13,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 05:47:14,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:14,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381179414] [2022-12-14 05:47:14,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381179414] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:14,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835735438] [2022-12-14 05:47:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:14,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:14,102 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:14,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:47:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:47:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:47:14,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:14,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835735438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:14,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:14,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 05:47:14,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001431665] [2022-12-14 05:47:14,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:14,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:47:14,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:14,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:47:14,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:47:14,385 INFO L87 Difference]: Start difference. First operand 8026 states and 13217 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:47:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:14,931 INFO L93 Difference]: Finished difference Result 15467 states and 25815 transitions. [2022-12-14 05:47:14,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:47:14,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2022-12-14 05:47:14,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:14,977 INFO L225 Difference]: With dead ends: 15467 [2022-12-14 05:47:14,977 INFO L226 Difference]: Without dead ends: 8294 [2022-12-14 05:47:15,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:47:15,008 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 13 mSDsluCounter, 3026 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3641 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:15,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3641 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:47:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8294 states. [2022-12-14 05:47:15,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8294 to 8054. [2022-12-14 05:47:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8054 states, 6092 states have (on average 1.5221602101116218) internal successors, (9273), 6340 states have internal predecessors, (9273), 1432 states have call successors, (1432), 378 states have call predecessors, (1432), 529 states have return successors, (2540), 1479 states have call predecessors, (2540), 1424 states have call successors, (2540) [2022-12-14 05:47:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8054 states to 8054 states and 13245 transitions. [2022-12-14 05:47:15,497 INFO L78 Accepts]: Start accepts. Automaton has 8054 states and 13245 transitions. Word has length 128 [2022-12-14 05:47:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:15,497 INFO L495 AbstractCegarLoop]: Abstraction has 8054 states and 13245 transitions. [2022-12-14 05:47:15,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:47:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 8054 states and 13245 transitions. [2022-12-14 05:47:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 05:47:15,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:15,500 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:47:15,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 05:47:15,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:15,702 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:15,703 INFO L85 PathProgramCache]: Analyzing trace with hash 425823849, now seen corresponding path program 1 times [2022-12-14 05:47:15,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:15,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031646813] [2022-12-14 05:47:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:15,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 05:47:16,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031646813] [2022-12-14 05:47:16,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031646813] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274501556] [2022-12-14 05:47:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:16,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:16,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:16,070 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:16,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:47:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:16,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:47:16,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:47:16,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:16,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274501556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:16,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:16,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-14 05:47:16,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705899970] [2022-12-14 05:47:16,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:16,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:47:16,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:16,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:47:16,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:47:16,338 INFO L87 Difference]: Start difference. First operand 8054 states and 13245 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 05:47:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:16,860 INFO L93 Difference]: Finished difference Result 15943 states and 26698 transitions. [2022-12-14 05:47:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:47:16,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 135 [2022-12-14 05:47:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:16,888 INFO L225 Difference]: With dead ends: 15943 [2022-12-14 05:47:16,889 INFO L226 Difference]: Without dead ends: 6778 [2022-12-14 05:47:16,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:47:16,921 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 217 mSDsluCounter, 2248 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:16,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 2879 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:47:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6778 states. [2022-12-14 05:47:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6778 to 6778. [2022-12-14 05:47:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 4954 states have (on average 1.4745660072668552) internal successors, (7305), 5200 states have internal predecessors, (7305), 1312 states have call successors, (1312), 372 states have call predecessors, (1312), 511 states have return successors, (2384), 1349 states have call predecessors, (2384), 1304 states have call successors, (2384) [2022-12-14 05:47:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 11001 transitions. [2022-12-14 05:47:17,269 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 11001 transitions. Word has length 135 [2022-12-14 05:47:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:17,269 INFO L495 AbstractCegarLoop]: Abstraction has 6778 states and 11001 transitions. [2022-12-14 05:47:17,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 05:47:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 11001 transitions. [2022-12-14 05:47:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 05:47:17,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:17,275 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:47:17,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:47:17,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:17,476 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:17,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:17,477 INFO L85 PathProgramCache]: Analyzing trace with hash -277632237, now seen corresponding path program 1 times [2022-12-14 05:47:17,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:17,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63700300] [2022-12-14 05:47:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 05:47:17,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:17,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63700300] [2022-12-14 05:47:17,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63700300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:17,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726310460] [2022-12-14 05:47:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:17,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:17,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:17,816 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:17,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:47:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:18,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:47:18,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 05:47:18,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:18,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726310460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:18,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:18,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-14 05:47:18,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723263105] [2022-12-14 05:47:18,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:18,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:47:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:18,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:47:18,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:47:18,103 INFO L87 Difference]: Start difference. First operand 6778 states and 11001 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 05:47:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:18,663 INFO L93 Difference]: Finished difference Result 14920 states and 24634 transitions. [2022-12-14 05:47:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:47:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 136 [2022-12-14 05:47:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:18,691 INFO L225 Difference]: With dead ends: 14920 [2022-12-14 05:47:18,691 INFO L226 Difference]: Without dead ends: 7611 [2022-12-14 05:47:18,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:47:18,719 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 309 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 2778 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:18,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 2778 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:47:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7611 states. [2022-12-14 05:47:19,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7611 to 7554. [2022-12-14 05:47:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7554 states, 5681 states have (on average 1.4673472980109137) internal successors, (8336), 5922 states have internal predecessors, (8336), 1338 states have call successors, (1338), 400 states have call predecessors, (1338), 534 states have return successors, (2234), 1375 states have call predecessors, (2234), 1330 states have call successors, (2234) [2022-12-14 05:47:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 11908 transitions. [2022-12-14 05:47:19,159 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 11908 transitions. Word has length 136 [2022-12-14 05:47:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:19,160 INFO L495 AbstractCegarLoop]: Abstraction has 7554 states and 11908 transitions. [2022-12-14 05:47:19,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 05:47:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 11908 transitions. [2022-12-14 05:47:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 05:47:19,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:19,171 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 05:47:19,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 05:47:19,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:47:19,372 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash -161378549, now seen corresponding path program 1 times [2022-12-14 05:47:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:19,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124565056] [2022-12-14 05:47:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:19,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 05:47:19,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124565056] [2022-12-14 05:47:19,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124565056] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228304490] [2022-12-14 05:47:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:19,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:19,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:19,823 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:19,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 05:47:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:20,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:47:20,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 05:47:20,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:20,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228304490] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:20,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:20,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-12-14 05:47:20,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666101268] [2022-12-14 05:47:20,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:20,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:47:20,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:20,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:47:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:47:20,441 INFO L87 Difference]: Start difference. First operand 7554 states and 11908 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 05:47:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:24,046 INFO L93 Difference]: Finished difference Result 30938 states and 50838 transitions. [2022-12-14 05:47:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:47:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) Word has length 137 [2022-12-14 05:47:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:24,134 INFO L225 Difference]: With dead ends: 30938 [2022-12-14 05:47:24,134 INFO L226 Difference]: Without dead ends: 23881 [2022-12-14 05:47:24,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:47:24,174 INFO L413 NwaCegarLoop]: 2190 mSDtfsCounter, 3159 mSDsluCounter, 3716 mSDsCounter, 0 mSdLazyCounter, 2546 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3171 SdHoareTripleChecker+Valid, 5906 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 2546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:24,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3171 Valid, 5906 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 2546 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 05:47:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23881 states. [2022-12-14 05:47:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23881 to 19866. [2022-12-14 05:47:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19866 states, 15275 states have (on average 1.4386252045826513) internal successors, (21975), 15749 states have internal predecessors, (21975), 3103 states have call successors, (3103), 1080 states have call predecessors, (3103), 1487 states have return successors, (6975), 3228 states have call predecessors, (6975), 3085 states have call successors, (6975) [2022-12-14 05:47:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19866 states to 19866 states and 32053 transitions. [2022-12-14 05:47:25,396 INFO L78 Accepts]: Start accepts. Automaton has 19866 states and 32053 transitions. Word has length 137 [2022-12-14 05:47:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:25,396 INFO L495 AbstractCegarLoop]: Abstraction has 19866 states and 32053 transitions. [2022-12-14 05:47:25,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 05:47:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 19866 states and 32053 transitions. [2022-12-14 05:47:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 05:47:25,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:25,405 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:47:25,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 05:47:25,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 05:47:25,606 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash 748184899, now seen corresponding path program 1 times [2022-12-14 05:47:25,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:25,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853362943] [2022-12-14 05:47:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:25,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 05:47:25,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:25,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853362943] [2022-12-14 05:47:25,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853362943] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:25,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190540211] [2022-12-14 05:47:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:25,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:25,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:25,799 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:25,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:47:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:25,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:47:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 05:47:26,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:26,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190540211] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:26,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:26,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 05:47:26,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663067781] [2022-12-14 05:47:26,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:26,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:47:26,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:26,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:47:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:47:26,010 INFO L87 Difference]: Start difference. First operand 19866 states and 32053 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:47:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:27,289 INFO L93 Difference]: Finished difference Result 39717 states and 66864 transitions. [2022-12-14 05:47:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:47:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 138 [2022-12-14 05:47:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:27,408 INFO L225 Difference]: With dead ends: 39717 [2022-12-14 05:47:27,408 INFO L226 Difference]: Without dead ends: 22251 [2022-12-14 05:47:27,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:47:27,485 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 105 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:27,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1369 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:47:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22251 states. [2022-12-14 05:47:28,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22251 to 20062. [2022-12-14 05:47:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20062 states, 15443 states have (on average 1.4356666450819142) internal successors, (22171), 15917 states have internal predecessors, (22171), 3131 states have call successors, (3131), 1080 states have call predecessors, (3131), 1487 states have return successors, (7003), 3256 states have call predecessors, (7003), 3113 states have call successors, (7003) [2022-12-14 05:47:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20062 states to 20062 states and 32305 transitions. [2022-12-14 05:47:28,602 INFO L78 Accepts]: Start accepts. Automaton has 20062 states and 32305 transitions. Word has length 138 [2022-12-14 05:47:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:28,603 INFO L495 AbstractCegarLoop]: Abstraction has 20062 states and 32305 transitions. [2022-12-14 05:47:28,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:47:28,603 INFO L276 IsEmpty]: Start isEmpty. Operand 20062 states and 32305 transitions. [2022-12-14 05:47:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 05:47:28,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:28,611 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:47:28,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 05:47:28,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:28,813 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:28,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:28,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1021079786, now seen corresponding path program 1 times [2022-12-14 05:47:28,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:28,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050998050] [2022-12-14 05:47:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:28,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 05:47:28,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:28,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050998050] [2022-12-14 05:47:28,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050998050] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:28,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459912580] [2022-12-14 05:47:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:28,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:28,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:28,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:28,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:47:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:29,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:47:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:47:29,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:29,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459912580] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:29,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:29,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 05:47:29,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527128132] [2022-12-14 05:47:29,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:29,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:47:29,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:47:29,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:47:29,269 INFO L87 Difference]: Start difference. First operand 20062 states and 32305 transitions. Second operand has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-12-14 05:47:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:32,818 INFO L93 Difference]: Finished difference Result 42989 states and 70658 transitions. [2022-12-14 05:47:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 05:47:32,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 138 [2022-12-14 05:47:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:32,920 INFO L225 Difference]: With dead ends: 42989 [2022-12-14 05:47:32,921 INFO L226 Difference]: Without dead ends: 22496 [2022-12-14 05:47:32,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-12-14 05:47:32,993 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 1671 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 3892 mSolverCounterSat, 1088 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 4980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1088 IncrementalHoareTripleChecker+Valid, 3892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:32,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1707 Valid, 1787 Invalid, 4980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1088 Valid, 3892 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 05:47:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22496 states. [2022-12-14 05:47:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22496 to 20042. [2022-12-14 05:47:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20042 states, 15423 states have (on average 1.4359722492381508) internal successors, (22147), 15897 states have internal predecessors, (22147), 3131 states have call successors, (3131), 1080 states have call predecessors, (3131), 1487 states have return successors, (7003), 3256 states have call predecessors, (7003), 3113 states have call successors, (7003) [2022-12-14 05:47:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20042 states to 20042 states and 32281 transitions. [2022-12-14 05:47:34,217 INFO L78 Accepts]: Start accepts. Automaton has 20042 states and 32281 transitions. Word has length 138 [2022-12-14 05:47:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:34,217 INFO L495 AbstractCegarLoop]: Abstraction has 20042 states and 32281 transitions. [2022-12-14 05:47:34,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-12-14 05:47:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 20042 states and 32281 transitions. [2022-12-14 05:47:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 05:47:34,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:34,226 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:47:34,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 05:47:34,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:47:34,427 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:34,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1480052435, now seen corresponding path program 1 times [2022-12-14 05:47:34,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:34,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594725292] [2022-12-14 05:47:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:34,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 05:47:34,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:34,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594725292] [2022-12-14 05:47:34,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594725292] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:34,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121424352] [2022-12-14 05:47:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:34,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:34,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:34,820 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:34,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:47:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:35,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 2000 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:47:35,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 05:47:35,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:35,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121424352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:35,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:35,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-12-14 05:47:35,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506130093] [2022-12-14 05:47:35,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:35,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:47:35,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:35,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:47:35,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:47:35,103 INFO L87 Difference]: Start difference. First operand 20042 states and 32281 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-12-14 05:47:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:37,124 INFO L93 Difference]: Finished difference Result 45870 states and 76443 transitions. [2022-12-14 05:47:37,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:47:37,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 145 [2022-12-14 05:47:37,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:37,248 INFO L225 Difference]: With dead ends: 45870 [2022-12-14 05:47:37,248 INFO L226 Difference]: Without dead ends: 25840 [2022-12-14 05:47:37,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:47:37,339 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 486 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:37,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1341 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:47:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25840 states. [2022-12-14 05:47:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25840 to 25498. [2022-12-14 05:47:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25498 states, 19716 states have (on average 1.4389835666463786) internal successors, (28371), 20318 states have internal predecessors, (28371), 3899 states have call successors, (3899), 1347 states have call predecessors, (3899), 1882 states have return successors, (8998), 4072 states have call predecessors, (8998), 3881 states have call successors, (8998) [2022-12-14 05:47:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25498 states to 25498 states and 41268 transitions. [2022-12-14 05:47:38,951 INFO L78 Accepts]: Start accepts. Automaton has 25498 states and 41268 transitions. Word has length 145 [2022-12-14 05:47:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:38,951 INFO L495 AbstractCegarLoop]: Abstraction has 25498 states and 41268 transitions. [2022-12-14 05:47:38,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-12-14 05:47:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 25498 states and 41268 transitions. [2022-12-14 05:47:38,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-14 05:47:38,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:38,961 INFO L195 NwaCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:47:38,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 05:47:39,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:39,162 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:39,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1870482681, now seen corresponding path program 1 times [2022-12-14 05:47:39,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:39,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487600857] [2022-12-14 05:47:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:39,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 05:47:39,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487600857] [2022-12-14 05:47:39,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487600857] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128351090] [2022-12-14 05:47:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:39,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:39,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:39,548 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:39,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:47:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1871 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:47:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 05:47:39,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:47:39,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128351090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:47:39,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:47:39,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-12-14 05:47:39,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001507242] [2022-12-14 05:47:39,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:47:39,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:47:39,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:39,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:47:39,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:47:39,921 INFO L87 Difference]: Start difference. First operand 25498 states and 41268 transitions. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 5 states have call predecessors, (28), 3 states have call successors, (28) [2022-12-14 05:47:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:47:42,505 INFO L93 Difference]: Finished difference Result 58432 states and 103608 transitions. [2022-12-14 05:47:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:47:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 5 states have call predecessors, (28), 3 states have call successors, (28) Word has length 194 [2022-12-14 05:47:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:47:42,695 INFO L225 Difference]: With dead ends: 58432 [2022-12-14 05:47:42,695 INFO L226 Difference]: Without dead ends: 35218 [2022-12-14 05:47:42,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:47:42,825 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 501 mSDsluCounter, 2966 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:47:42,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 3683 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:47:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35218 states. [2022-12-14 05:47:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35218 to 34458. [2022-12-14 05:47:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34458 states, 26460 states have (on average 1.413567649281935) internal successors, (37403), 27298 states have internal predecessors, (37403), 5047 states have call successors, (5047), 2031 states have call predecessors, (5047), 2950 states have return successors, (16528), 5368 states have call predecessors, (16528), 5029 states have call successors, (16528) [2022-12-14 05:47:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34458 states to 34458 states and 58978 transitions. [2022-12-14 05:47:45,323 INFO L78 Accepts]: Start accepts. Automaton has 34458 states and 58978 transitions. Word has length 194 [2022-12-14 05:47:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:45,324 INFO L495 AbstractCegarLoop]: Abstraction has 34458 states and 58978 transitions. [2022-12-14 05:47:45,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 5 states have call predecessors, (28), 3 states have call successors, (28) [2022-12-14 05:47:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 34458 states and 58978 transitions. [2022-12-14 05:47:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-14 05:47:45,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:45,334 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:47:45,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 05:47:45,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:45,536 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash 648359869, now seen corresponding path program 1 times [2022-12-14 05:47:45,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:45,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20705801] [2022-12-14 05:47:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:45,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 05:47:45,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:45,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20705801] [2022-12-14 05:47:45,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20705801] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:45,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729974559] [2022-12-14 05:47:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:45,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:45,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:45,901 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:45,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 05:47:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:46,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 1806 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:47:46,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:47:46,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:47:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:47:46,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729974559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:47:46,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763690659] [2022-12-14 05:47:46,667 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2022-12-14 05:47:46,668 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:47:46,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:47:46,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:47:46,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:47:50,619 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-12-14 05:47:57,644 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 499 for LOIs [2022-12-14 05:47:58,006 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-12-14 05:48:00,198 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-12-14 05:48:00,402 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2022-12-14 05:48:00,480 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-12-14 05:48:00,558 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-12-14 05:48:04,118 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 05:48:04,698 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 05:48:04,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:49:19,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1763690659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:49:19,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:49:19,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 6, 7] total 44 [2022-12-14 05:49:19,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732181521] [2022-12-14 05:49:19,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:49:19,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 05:49:19,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:49:19,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 05:49:19,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1684, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 05:49:19,563 INFO L87 Difference]: Start difference. First operand 34458 states and 58978 transitions. Second operand has 29 states, 21 states have (on average 4.285714285714286) internal successors, (90), 17 states have internal predecessors, (90), 11 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-12-14 05:50:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:10,974 INFO L93 Difference]: Finished difference Result 69037 states and 118131 transitions. [2022-12-14 05:50:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 05:50:10,976 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 4.285714285714286) internal successors, (90), 17 states have internal predecessors, (90), 11 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 160 [2022-12-14 05:50:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:11,150 INFO L225 Difference]: With dead ends: 69037 [2022-12-14 05:50:11,150 INFO L226 Difference]: Without dead ends: 34591 [2022-12-14 05:50:11,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 438 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 97.0s TimeCoverageRelationStatistics Valid=256, Invalid=2194, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 05:50:11,314 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 286 mSDsluCounter, 4219 mSDsCounter, 0 mSdLazyCounter, 6536 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 4834 SdHoareTripleChecker+Invalid, 6612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 6536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:11,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 4834 Invalid, 6612 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 6536 Invalid, 0 Unknown, 0 Unchecked, 26.9s Time] [2022-12-14 05:50:11,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34591 states. [2022-12-14 05:50:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34591 to 34512. [2022-12-14 05:50:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34512 states, 26500 states have (on average 1.413132075471698) internal successors, (37448), 27337 states have internal predecessors, (37448), 5056 states have call successors, (5056), 2037 states have call predecessors, (5056), 2955 states have return successors, (16537), 5377 states have call predecessors, (16537), 5038 states have call successors, (16537) [2022-12-14 05:50:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34512 states to 34512 states and 59041 transitions. [2022-12-14 05:50:13,622 INFO L78 Accepts]: Start accepts. Automaton has 34512 states and 59041 transitions. Word has length 160 [2022-12-14 05:50:13,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:13,623 INFO L495 AbstractCegarLoop]: Abstraction has 34512 states and 59041 transitions. [2022-12-14 05:50:13,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 4.285714285714286) internal successors, (90), 17 states have internal predecessors, (90), 11 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-12-14 05:50:13,623 INFO L276 IsEmpty]: Start isEmpty. Operand 34512 states and 59041 transitions. [2022-12-14 05:50:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 05:50:13,632 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:13,632 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:50:13,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 05:50:13,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 05:50:13,833 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:13,833 INFO L85 PathProgramCache]: Analyzing trace with hash -792602863, now seen corresponding path program 1 times [2022-12-14 05:50:13,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:13,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325461352] [2022-12-14 05:50:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 05:50:13,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:13,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325461352] [2022-12-14 05:50:13,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325461352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:13,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:13,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:50:13,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592869458] [2022-12-14 05:50:13,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:13,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:50:13,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:50:13,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:50:13,947 INFO L87 Difference]: Start difference. First operand 34512 states and 59041 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2022-12-14 05:50:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:17,820 INFO L93 Difference]: Finished difference Result 90087 states and 160016 transitions. [2022-12-14 05:50:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:50:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 179 [2022-12-14 05:50:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:18,146 INFO L225 Difference]: With dead ends: 90087 [2022-12-14 05:50:18,146 INFO L226 Difference]: Without dead ends: 55511 [2022-12-14 05:50:18,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:50:18,441 INFO L413 NwaCegarLoop]: 1261 mSDtfsCounter, 1133 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:18,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 2636 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:50:18,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55511 states. [2022-12-14 05:50:21,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55511 to 53135. [2022-12-14 05:50:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53135 states, 40717 states have (on average 1.4148881302649998) internal successors, (57610), 42008 states have internal predecessors, (57610), 7849 states have call successors, (7849), 3194 states have call predecessors, (7849), 4568 states have return successors, (27082), 8302 states have call predecessors, (27082), 7823 states have call successors, (27082) [2022-12-14 05:50:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53135 states to 53135 states and 92541 transitions. [2022-12-14 05:50:21,804 INFO L78 Accepts]: Start accepts. Automaton has 53135 states and 92541 transitions. Word has length 179 [2022-12-14 05:50:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:21,804 INFO L495 AbstractCegarLoop]: Abstraction has 53135 states and 92541 transitions. [2022-12-14 05:50:21,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2022-12-14 05:50:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 53135 states and 92541 transitions. [2022-12-14 05:50:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 05:50:21,811 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:21,811 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:50:21,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 05:50:21,812 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:21,812 INFO L85 PathProgramCache]: Analyzing trace with hash -388230556, now seen corresponding path program 1 times [2022-12-14 05:50:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:21,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387901496] [2022-12-14 05:50:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:21,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:50:22,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387901496] [2022-12-14 05:50:22,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387901496] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629337111] [2022-12-14 05:50:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:22,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:22,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:22,047 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:22,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 05:50:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:22,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:50:22,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 05:50:22,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:22,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629337111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:22,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:22,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-12-14 05:50:22,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328825180] [2022-12-14 05:50:22,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:50:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:50:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:50:22,330 INFO L87 Difference]: Start difference. First operand 53135 states and 92541 transitions. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 05:50:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:27,625 INFO L93 Difference]: Finished difference Result 119051 states and 219419 transitions. [2022-12-14 05:50:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:50:27,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) Word has length 172 [2022-12-14 05:50:27,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:28,037 INFO L225 Difference]: With dead ends: 119051 [2022-12-14 05:50:28,037 INFO L226 Difference]: Without dead ends: 69375 [2022-12-14 05:50:28,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:50:28,365 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 509 mSDsluCounter, 2997 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 3734 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:28,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 3734 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:50:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69375 states. [2022-12-14 05:50:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69375 to 67785. [2022-12-14 05:50:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67785 states, 52159 states have (on average 1.3518280641883471) internal successors, (70510), 54014 states have internal predecessors, (70510), 9243 states have call successors, (9243), 3958 states have call predecessors, (9243), 6382 states have return successors, (37648), 10182 states have call predecessors, (37648), 9217 states have call successors, (37648) [2022-12-14 05:50:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67785 states to 67785 states and 117401 transitions. [2022-12-14 05:50:32,720 INFO L78 Accepts]: Start accepts. Automaton has 67785 states and 117401 transitions. Word has length 172 [2022-12-14 05:50:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:32,720 INFO L495 AbstractCegarLoop]: Abstraction has 67785 states and 117401 transitions. [2022-12-14 05:50:32,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 05:50:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 67785 states and 117401 transitions. [2022-12-14 05:50:32,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 05:50:32,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:32,728 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:50:32,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 05:50:32,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:32,930 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:32,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2056024039, now seen corresponding path program 1 times [2022-12-14 05:50:32,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:32,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917558431] [2022-12-14 05:50:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:32,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 05:50:33,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:33,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917558431] [2022-12-14 05:50:33,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917558431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:33,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075038933] [2022-12-14 05:50:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:33,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:33,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:33,236 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:33,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 05:50:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:50:33,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 05:50:33,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:50:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 05:50:33,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075038933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:50:33,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [114905063] [2022-12-14 05:50:33,876 INFO L159 IcfgInterpreter]: Started Sifa with 133 locations of interest [2022-12-14 05:50:33,876 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:50:33,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:50:33,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:50:33,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:50:38,187 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-12-14 05:50:47,162 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 60 for LOIs [2022-12-14 05:50:47,173 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-12-14 05:50:49,314 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-12-14 05:50:49,520 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2022-12-14 05:50:49,597 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-12-14 05:50:49,674 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-12-14 05:50:53,221 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 05:50:53,794 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 05:50:53,966 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:52:11,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [114905063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:52:11,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:52:11,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [7, 6, 7] total 44 [2022-12-14 05:52:11,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103316548] [2022-12-14 05:52:11,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:52:11,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 05:52:11,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:52:11,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 05:52:11,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 05:52:11,385 INFO L87 Difference]: Start difference. First operand 67785 states and 117401 transitions. Second operand has 31 states, 23 states have (on average 4.043478260869565) internal successors, (93), 18 states have internal predecessors, (93), 12 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2022-12-14 05:53:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:53:05,643 INFO L93 Difference]: Finished difference Result 135561 states and 234822 transitions. [2022-12-14 05:53:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 05:53:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 4.043478260869565) internal successors, (93), 18 states have internal predecessors, (93), 12 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) Word has length 166 [2022-12-14 05:53:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:53:06,035 INFO L225 Difference]: With dead ends: 135561 [2022-12-14 05:53:06,035 INFO L226 Difference]: Without dead ends: 67854 [2022-12-14 05:53:06,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 455 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 96.3s TimeCoverageRelationStatistics Valid=231, Invalid=2219, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 05:53:06,343 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 237 mSDsluCounter, 5755 mSDsCounter, 0 mSdLazyCounter, 7867 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 6367 SdHoareTripleChecker+Invalid, 7925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 7867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:53:06,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 6367 Invalid, 7925 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [58 Valid, 7867 Invalid, 0 Unknown, 0 Unchecked, 31.2s Time] [2022-12-14 05:53:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67854 states. [2022-12-14 05:53:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67854 to 67787. [2022-12-14 05:53:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67787 states, 52160 states have (on average 1.3518021472392638) internal successors, (70510), 54015 states have internal predecessors, (70510), 9243 states have call successors, (9243), 3959 states have call predecessors, (9243), 6383 states have return successors, (37648), 10182 states have call predecessors, (37648), 9217 states have call successors, (37648) [2022-12-14 05:53:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67787 states to 67787 states and 117401 transitions. [2022-12-14 05:53:10,717 INFO L78 Accepts]: Start accepts. Automaton has 67787 states and 117401 transitions. Word has length 166 [2022-12-14 05:53:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:53:10,718 INFO L495 AbstractCegarLoop]: Abstraction has 67787 states and 117401 transitions. [2022-12-14 05:53:10,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 4.043478260869565) internal successors, (93), 18 states have internal predecessors, (93), 12 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2022-12-14 05:53:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 67787 states and 117401 transitions. [2022-12-14 05:53:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 05:53:10,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:53:10,727 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:53:10,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 05:53:10,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 05:53:10,928 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:53:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:53:10,929 INFO L85 PathProgramCache]: Analyzing trace with hash -918135486, now seen corresponding path program 1 times [2022-12-14 05:53:10,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:53:10,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461852331] [2022-12-14 05:53:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:53:10,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:53:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:53:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 05:53:11,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:53:11,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461852331] [2022-12-14 05:53:11,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461852331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:53:11,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950948779] [2022-12-14 05:53:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:53:11,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:53:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:53:11,675 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:53:11,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 05:53:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:53:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 2033 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:53:11,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:53:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:53:11,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:53:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 05:53:12,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950948779] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:53:12,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46137918] [2022-12-14 05:53:12,096 INFO L159 IcfgInterpreter]: Started Sifa with 104 locations of interest [2022-12-14 05:53:12,096 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:53:12,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:53:12,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:53:12,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:53:18,149 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 681 for LOIs [2022-12-14 05:53:27,238 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-12-14 05:53:27,239 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-12-14 05:53:27,776 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 105 for LOIs [2022-12-14 05:53:28,261 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 70 for LOIs [2022-12-14 05:53:28,271 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 53 for LOIs [2022-12-14 05:53:28,283 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-12-14 05:53:30,442 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-12-14 05:53:30,653 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 48 for LOIs [2022-12-14 05:53:30,657 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 73 for LOIs [2022-12-14 05:53:30,682 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 51 for LOIs [2022-12-14 05:53:30,687 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-12-14 05:53:34,256 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 05:53:34,836 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 05:53:34,997 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:54:42,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1680377#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 05:54:42,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:54:42,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:54:42,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 7] total 26 [2022-12-14 05:54:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113271619] [2022-12-14 05:54:42,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:54:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 05:54:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:54:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 05:54:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=11707, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 05:54:42,449 INFO L87 Difference]: Start difference. First operand 67787 states and 117401 transitions. Second operand has 26 states, 18 states have (on average 9.277777777777779) internal successors, (167), 22 states have internal predecessors, (167), 13 states have call successors, (59), 5 states have call predecessors, (59), 14 states have return successors, (61), 16 states have call predecessors, (61), 13 states have call successors, (61) [2022-12-14 05:55:00,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:55:00,334 INFO L93 Difference]: Finished difference Result 160266 states and 320913 transitions. [2022-12-14 05:55:00,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 05:55:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 18 states have (on average 9.277777777777779) internal successors, (167), 22 states have internal predecessors, (167), 13 states have call successors, (59), 5 states have call predecessors, (59), 14 states have return successors, (61), 16 states have call predecessors, (61), 13 states have call successors, (61) Word has length 159 [2022-12-14 05:55:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:55:00,994 INFO L225 Difference]: With dead ends: 160266 [2022-12-14 05:55:00,994 INFO L226 Difference]: Without dead ends: 95716 [2022-12-14 05:55:01,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 399 SyntacticMatches, 11 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11146 ImplicationChecksByTransitivity, 69.2s TimeCoverageRelationStatistics Valid=1758, Invalid=25964, Unknown=0, NotChecked=0, Total=27722 [2022-12-14 05:55:01,612 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 8460 mSDsluCounter, 5239 mSDsCounter, 0 mSdLazyCounter, 17838 mSolverCounterSat, 5367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8460 SdHoareTripleChecker+Valid, 5835 SdHoareTripleChecker+Invalid, 23205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5367 IncrementalHoareTripleChecker+Valid, 17838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:55:01,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8460 Valid, 5835 Invalid, 23205 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5367 Valid, 17838 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-12-14 05:55:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95716 states. [2022-12-14 05:55:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95716 to 92504. [2022-12-14 05:55:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92504 states, 67918 states have (on average 1.3247445448923703) internal successors, (89974), 71044 states have internal predecessors, (89974), 15637 states have call successors, (15637), 6331 states have call predecessors, (15637), 8948 states have return successors, (52136), 16026 states have call predecessors, (52136), 15596 states have call successors, (52136) [2022-12-14 05:55:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92504 states to 92504 states and 157747 transitions. [2022-12-14 05:55:09,241 INFO L78 Accepts]: Start accepts. Automaton has 92504 states and 157747 transitions. Word has length 159 [2022-12-14 05:55:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:55:09,241 INFO L495 AbstractCegarLoop]: Abstraction has 92504 states and 157747 transitions. [2022-12-14 05:55:09,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 18 states have (on average 9.277777777777779) internal successors, (167), 22 states have internal predecessors, (167), 13 states have call successors, (59), 5 states have call predecessors, (59), 14 states have return successors, (61), 16 states have call predecessors, (61), 13 states have call successors, (61) [2022-12-14 05:55:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 92504 states and 157747 transitions. [2022-12-14 05:55:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 05:55:09,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:55:09,246 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:55:09,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-14 05:55:09,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 05:55:09,447 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:55:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:55:09,447 INFO L85 PathProgramCache]: Analyzing trace with hash -2141536120, now seen corresponding path program 1 times [2022-12-14 05:55:09,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:55:09,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050118088] [2022-12-14 05:55:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:55:09,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:55:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:55:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 05:55:09,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:55:09,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050118088] [2022-12-14 05:55:09,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050118088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:55:09,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642249857] [2022-12-14 05:55:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:55:09,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:55:09,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:55:09,926 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:55:09,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 05:55:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:55:10,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:55:10,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:55:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:55:10,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:55:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 05:55:10,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642249857] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:55:10,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043575689] [2022-12-14 05:55:10,657 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2022-12-14 05:55:10,658 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:55:10,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:55:10,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:55:10,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:55:14,703 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-12-14 05:55:25,768 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 498 for LOIs [2022-12-14 05:55:25,976 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-12-14 05:55:28,180 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-12-14 05:55:28,391 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2022-12-14 05:55:28,468 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-12-14 05:55:28,545 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-12-14 05:55:32,225 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 05:55:32,810 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 05:55:32,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:57:04,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1043575689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:57:04,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:57:04,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [11, 6, 7] total 50 [2022-12-14 05:57:04,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913374205] [2022-12-14 05:57:04,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:57:04,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 05:57:04,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:57:04,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 05:57:04,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 05:57:04,362 INFO L87 Difference]: Start difference. First operand 92504 states and 157747 transitions. Second operand has 33 states, 25 states have (on average 3.72) internal successors, (93), 19 states have internal predecessors, (93), 13 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-12-14 05:58:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:05,365 INFO L93 Difference]: Finished difference Result 184997 states and 315503 transitions. [2022-12-14 05:58:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 05:58:05,367 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 3.72) internal successors, (93), 19 states have internal predecessors, (93), 13 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 181 [2022-12-14 05:58:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:05,964 INFO L225 Difference]: With dead ends: 184997 [2022-12-14 05:58:05,964 INFO L226 Difference]: Without dead ends: 92573 [2022-12-14 05:58:06,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 499 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 114.8s TimeCoverageRelationStatistics Valid=306, Invalid=2774, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 05:58:06,451 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 307 mSDsluCounter, 5192 mSDsCounter, 0 mSdLazyCounter, 7090 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 5701 SdHoareTripleChecker+Invalid, 7169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 7090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:06,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 5701 Invalid, 7169 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [79 Valid, 7090 Invalid, 0 Unknown, 0 Unchecked, 30.0s Time] [2022-12-14 05:58:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92573 states. [2022-12-14 05:58:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92573 to 92506. [2022-12-14 05:58:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92506 states, 67919 states have (on average 1.324725040121321) internal successors, (89974), 71045 states have internal predecessors, (89974), 15637 states have call successors, (15637), 6332 states have call predecessors, (15637), 8949 states have return successors, (52124), 16026 states have call predecessors, (52124), 15596 states have call successors, (52124) [2022-12-14 05:58:14,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92506 states to 92506 states and 157735 transitions. [2022-12-14 05:58:14,143 INFO L78 Accepts]: Start accepts. Automaton has 92506 states and 157735 transitions. Word has length 181 [2022-12-14 05:58:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:14,143 INFO L495 AbstractCegarLoop]: Abstraction has 92506 states and 157735 transitions. [2022-12-14 05:58:14,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 3.72) internal successors, (93), 19 states have internal predecessors, (93), 13 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-12-14 05:58:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 92506 states and 157735 transitions. [2022-12-14 05:58:14,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 05:58:14,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:14,154 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:58:14,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 05:58:14,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:58:14,355 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:58:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash -795058839, now seen corresponding path program 1 times [2022-12-14 05:58:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:14,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425535928] [2022-12-14 05:58:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:14,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:58:14,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425535928] [2022-12-14 05:58:14,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425535928] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:14,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:14,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:58:14,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053727181] [2022-12-14 05:58:14,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:14,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:58:14,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:14,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:58:14,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:58:14,659 INFO L87 Difference]: Start difference. First operand 92506 states and 157735 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 05:58:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:23,006 INFO L93 Difference]: Finished difference Result 174036 states and 295839 transitions. [2022-12-14 05:58:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:58:23,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 174 [2022-12-14 05:58:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:23,556 INFO L225 Difference]: With dead ends: 174036 [2022-12-14 05:58:23,556 INFO L226 Difference]: Without dead ends: 96009 [2022-12-14 05:58:23,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:58:23,915 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 17 mSDsluCounter, 2954 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:23,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3556 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:58:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96009 states. [2022-12-14 05:58:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96009 to 94780. [2022-12-14 05:58:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94780 states, 69475 states have (on average 1.3175098956459157) internal successors, (91534), 72813 states have internal predecessors, (91534), 15639 states have call successors, (15639), 6332 states have call predecessors, (15639), 9665 states have return successors, (53178), 16532 states have call predecessors, (53178), 15598 states have call successors, (53178) [2022-12-14 05:58:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94780 states to 94780 states and 160351 transitions. [2022-12-14 05:58:31,702 INFO L78 Accepts]: Start accepts. Automaton has 94780 states and 160351 transitions. Word has length 174 [2022-12-14 05:58:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:31,702 INFO L495 AbstractCegarLoop]: Abstraction has 94780 states and 160351 transitions. [2022-12-14 05:58:31,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 05:58:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 94780 states and 160351 transitions. [2022-12-14 05:58:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 05:58:31,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:31,713 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:58:31,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 05:58:31,713 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:58:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:31,714 INFO L85 PathProgramCache]: Analyzing trace with hash 664279861, now seen corresponding path program 1 times [2022-12-14 05:58:31,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:31,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557802479] [2022-12-14 05:58:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:31,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 05:58:31,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:31,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557802479] [2022-12-14 05:58:31,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557802479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:31,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:31,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:58:31,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786275735] [2022-12-14 05:58:31,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:31,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:58:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:58:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:58:31,882 INFO L87 Difference]: Start difference. First operand 94780 states and 160351 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 05:58:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:40,061 INFO L93 Difference]: Finished difference Result 177152 states and 298813 transitions. [2022-12-14 05:58:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:58:40,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 176 [2022-12-14 05:58:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:40,641 INFO L225 Difference]: With dead ends: 177152 [2022-12-14 05:58:40,642 INFO L226 Difference]: Without dead ends: 97315 [2022-12-14 05:58:41,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:58:41,015 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 17 mSDsluCounter, 2958 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3561 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:41,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3561 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:58:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97315 states. [2022-12-14 05:58:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97315 to 95212. [2022-12-14 05:58:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95212 states, 69755 states have (on average 1.3158913339545553) internal successors, (91790), 73109 states have internal predecessors, (91790), 15623 states have call successors, (15623), 6332 states have call predecessors, (15623), 9833 states have return successors, (53470), 16668 states have call predecessors, (53470), 15582 states have call successors, (53470) [2022-12-14 05:58:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95212 states to 95212 states and 160883 transitions. [2022-12-14 05:58:49,097 INFO L78 Accepts]: Start accepts. Automaton has 95212 states and 160883 transitions. Word has length 176 [2022-12-14 05:58:49,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:49,097 INFO L495 AbstractCegarLoop]: Abstraction has 95212 states and 160883 transitions. [2022-12-14 05:58:49,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 05:58:49,097 INFO L276 IsEmpty]: Start isEmpty. Operand 95212 states and 160883 transitions. [2022-12-14 05:58:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-12-14 05:58:49,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:49,109 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:58:49,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 05:58:49,109 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:58:49,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:49,109 INFO L85 PathProgramCache]: Analyzing trace with hash 743154393, now seen corresponding path program 1 times [2022-12-14 05:58:49,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:49,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047387178] [2022-12-14 05:58:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:49,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 05:58:49,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:49,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047387178] [2022-12-14 05:58:49,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047387178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:49,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:49,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:58:49,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679949777] [2022-12-14 05:58:49,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:49,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:58:49,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:49,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:58:49,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:58:49,268 INFO L87 Difference]: Start difference. First operand 95212 states and 160883 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 05:58:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:56,937 INFO L93 Difference]: Finished difference Result 177665 states and 299408 transitions. [2022-12-14 05:58:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:58:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 175 [2022-12-14 05:58:56,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:57,637 INFO L225 Difference]: With dead ends: 177665 [2022-12-14 05:58:57,637 INFO L226 Difference]: Without dead ends: 97247 [2022-12-14 05:58:57,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:58:57,953 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 17 mSDsluCounter, 2954 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:57,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3556 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:58:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97247 states. [2022-12-14 05:59:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97247 to 94500. [2022-12-14 05:59:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94500 states, 69323 states have (on average 1.313993912554275) internal successors, (91090), 72421 states have internal predecessors, (91090), 15483 states have call successors, (15483), 6332 states have call predecessors, (15483), 9693 states have return successors, (52970), 16644 states have call predecessors, (52970), 15442 states have call successors, (52970) [2022-12-14 05:59:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94500 states to 94500 states and 159543 transitions. [2022-12-14 05:59:05,726 INFO L78 Accepts]: Start accepts. Automaton has 94500 states and 159543 transitions. Word has length 175 [2022-12-14 05:59:05,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:05,726 INFO L495 AbstractCegarLoop]: Abstraction has 94500 states and 159543 transitions. [2022-12-14 05:59:05,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 05:59:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 94500 states and 159543 transitions. [2022-12-14 05:59:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-12-14 05:59:05,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:05,744 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:59:05,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 05:59:05,744 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2090860291, now seen corresponding path program 1 times [2022-12-14 05:59:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:05,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109934332] [2022-12-14 05:59:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:05,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 05:59:05,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:05,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109934332] [2022-12-14 05:59:05,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109934332] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:59:05,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3757580] [2022-12-14 05:59:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:05,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:05,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:59:05,862 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:59:05,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 05:59:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:06,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 2105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:59:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:59:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 05:59:06,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:59:06,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3757580] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:06,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:59:06,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:59:06,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031221521] [2022-12-14 05:59:06,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:06,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:59:06,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:59:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:59:06,117 INFO L87 Difference]: Start difference. First operand 94500 states and 159543 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 05:59:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:14,691 INFO L93 Difference]: Finished difference Result 184743 states and 334114 transitions. [2022-12-14 05:59:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:59:14,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 196 [2022-12-14 05:59:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:15,373 INFO L225 Difference]: With dead ends: 184743 [2022-12-14 05:59:15,373 INFO L226 Difference]: Without dead ends: 104924 [2022-12-14 05:59:15,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:59:15,911 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 519 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:15,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1226 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:59:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104924 states. [2022-12-14 05:59:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104924 to 104632. [2022-12-14 05:59:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104632 states, 77075 states have (on average 1.3017710022705158) internal successors, (100334), 80425 states have internal predecessors, (100334), 16547 states have call successors, (16547), 6944 states have call predecessors, (16547), 11009 states have return successors, (62954), 18160 states have call predecessors, (62954), 16506 states have call successors, (62954) [2022-12-14 05:59:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104632 states to 104632 states and 179835 transitions. [2022-12-14 05:59:25,110 INFO L78 Accepts]: Start accepts. Automaton has 104632 states and 179835 transitions. Word has length 196 [2022-12-14 05:59:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:25,110 INFO L495 AbstractCegarLoop]: Abstraction has 104632 states and 179835 transitions. [2022-12-14 05:59:25,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 05:59:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 104632 states and 179835 transitions. [2022-12-14 05:59:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 05:59:25,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:25,130 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:59:25,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 05:59:25,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:25,331 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:25,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1431535536, now seen corresponding path program 1 times [2022-12-14 05:59:25,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:25,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537473338] [2022-12-14 05:59:25,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:25,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:59:25,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537473338] [2022-12-14 05:59:25,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537473338] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:59:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347392559] [2022-12-14 05:59:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:25,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:25,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:59:25,468 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:59:25,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551a7677-7a1a-44d5-ab47-a08aba998c40/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 05:59:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:25,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:59:25,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:59:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 05:59:25,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:59:25,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347392559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:25,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:59:25,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:59:25,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815622423] [2022-12-14 05:59:25,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:25,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:59:25,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:25,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:59:25,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:59:25,764 INFO L87 Difference]: Start difference. First operand 104632 states and 179835 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25)