./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/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_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/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_030f6010-2e37-4cde-b148-2ea67e93ae7d/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 339ae17141354782861ad14ce1f1515b53735bca35311ebbaf6a68a6022f4172 --- 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 08:01:46,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:01:46,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:01:46,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:01:46,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:01:46,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:01:46,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:01:46,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:01:46,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:01:46,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:01:46,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:01:46,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:01:46,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:01:46,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:01:46,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:01:46,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:01:46,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:01:46,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:01:46,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:01:46,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:01:46,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:01:46,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:01:46,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:01:46,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:01:46,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:01:46,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:01:46,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:01:46,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:01:46,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:01:46,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:01:46,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:01:46,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:01:46,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:01:46,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:01:46,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:01:46,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:01:46,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:01:46,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:01:46,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:01:46,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:01:46,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:01:46,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:01:46,814 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:01:46,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:01:46,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:01:46,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:01:46,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:01:46,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:01:46,815 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:01:46,815 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:01:46,815 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:01:46,815 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:01:46,815 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:01:46,815 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:01:46,815 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:01:46,816 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:01:46,816 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:01:46,816 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:01:46,816 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:01:46,816 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:01:46,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:01:46,817 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:01:46,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:01:46,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:01:46,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:01:46,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:01:46,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:01:46,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:01:46,818 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:01:46,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:01:46,818 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:01:46,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:01:46,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:01:46,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:01:46,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:01:46,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:01:46,819 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:01:46,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:01:46,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:01:46,819 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:01:46,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:01:46,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:01:46,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:01:46,819 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_030f6010-2e37-4cde-b148-2ea67e93ae7d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 339ae17141354782861ad14ce1f1515b53735bca35311ebbaf6a68a6022f4172 [2022-12-14 08:01:47,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:01:47,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:01:47,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:01:47,037 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:01:47,037 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:01:47,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c [2022-12-14 08:01:49,494 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:01:49,755 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:01:49,755 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c [2022-12-14 08:01:49,771 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/data/f130dd429/115d59aa6bf54e529c8c9773161eb364/FLAG62ec11b48 [2022-12-14 08:01:49,783 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/data/f130dd429/115d59aa6bf54e529c8c9773161eb364 [2022-12-14 08:01:49,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:01:49,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:01:49,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:01:49,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:01:49,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:01:49,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:01:49" (1/1) ... [2022-12-14 08:01:49,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cdb1065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:49, skipping insertion in model container [2022-12-14 08:01:49,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:01:49" (1/1) ... [2022-12-14 08:01:49,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:01:49,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:01:50,239 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_030f6010-2e37-4cde-b148-2ea67e93ae7d/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c[73050,73063] [2022-12-14 08:01:50,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:01:50,254 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:01:50,380 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_030f6010-2e37-4cde-b148-2ea67e93ae7d/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c[73050,73063] [2022-12-14 08:01:50,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:01:50,406 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:01:50,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50 WrapperNode [2022-12-14 08:01:50,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:01:50,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:01:50,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:01:50,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:01:50,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,480 INFO L138 Inliner]: procedures = 97, calls = 345, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 1131 [2022-12-14 08:01:50,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:01:50,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:01:50,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:01:50,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:01:50,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,515 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:01:50,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:01:50,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:01:50,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:01:50,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (1/1) ... [2022-12-14 08:01:50,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:01:50,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:01:50,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:01:50,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:01:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 08:01:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 08:01:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 08:01:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 08:01:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 08:01:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 08:01:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 08:01:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 08:01:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 08:01:50,587 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 08:01:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 08:01:50,587 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 08:01:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 08:01:50,587 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 08:01:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 08:01:50,587 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 08:01:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 08:01:50,587 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 08:01:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:01:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 08:01:50,588 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 08:01:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 08:01:50,588 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 08:01:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 08:01:50,588 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 08:01:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 08:01:50,588 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 08:01:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 08:01:50,588 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 08:01:50,588 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 08:01:50,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 08:01:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 08:01:50,589 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 08:01:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 08:01:50,589 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 08:01:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 08:01:50,589 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 08:01:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 08:01:50,589 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 08:01:50,589 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 08:01:50,589 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 08:01:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 08:01:50,590 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 08:01:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 08:01:50,590 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 08:01:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-12-14 08:01:50,590 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-12-14 08:01:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:01:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 08:01:50,590 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 08:01:50,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:01:50,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:01:50,591 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 08:01:50,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 08:01:50,591 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 08:01:50,591 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 08:01:50,707 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:01:50,709 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:01:51,465 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:01:52,016 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:01:52,017 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:01:52,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:01:52 BoogieIcfgContainer [2022-12-14 08:01:52,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:01:52,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:01:52,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:01:52,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:01:52,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:01:49" (1/3) ... [2022-12-14 08:01:52,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577a532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:01:52, skipping insertion in model container [2022-12-14 08:01:52,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:50" (2/3) ... [2022-12-14 08:01:52,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577a532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:01:52, skipping insertion in model container [2022-12-14 08:01:52,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:01:52" (3/3) ... [2022-12-14 08:01:52,025 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product28.cil.c [2022-12-14 08:01:52,040 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:01:52,040 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:01:52,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:01:52,086 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;@34a6202d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:01:52,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:01:52,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 253 states have (on average 1.5849802371541502) internal successors, (401), 276 states have internal predecessors, (401), 97 states have call successors, (97), 26 states have call predecessors, (97), 26 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-12-14 08:01:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 08:01:52,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:01:52,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:01:52,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:01:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:01:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash 768349008, now seen corresponding path program 1 times [2022-12-14 08:01:52,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:01:52,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422448423] [2022-12-14 08:01:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:01:52,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:01:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:01:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:01:52,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:01:52,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422448423] [2022-12-14 08:01:52,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422448423] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:01:52,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:01:52,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:01:52,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807861774] [2022-12-14 08:01:52,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:01:52,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:01:52,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:01:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:01:52,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:01:52,446 INFO L87 Difference]: Start difference. First operand has 378 states, 253 states have (on average 1.5849802371541502) internal successors, (401), 276 states have internal predecessors, (401), 97 states have call successors, (97), 26 states have call predecessors, (97), 26 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 08:01:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:01:52,574 INFO L93 Difference]: Finished difference Result 396 states and 622 transitions. [2022-12-14 08:01:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:01:52,576 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2022-12-14 08:01:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:01:52,586 INFO L225 Difference]: With dead ends: 396 [2022-12-14 08:01:52,586 INFO L226 Difference]: Without dead ends: 374 [2022-12-14 08:01:52,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:01:52,591 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:01:52,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 550 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:01:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-12-14 08:01:52,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2022-12-14 08:01:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 251 states have (on average 1.5737051792828685) internal successors, (395), 272 states have internal predecessors, (395), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 08:01:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 584 transitions. [2022-12-14 08:01:52,643 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 584 transitions. Word has length 43 [2022-12-14 08:01:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:01:52,644 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 584 transitions. [2022-12-14 08:01:52,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 08:01:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 584 transitions. [2022-12-14 08:01:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 08:01:52,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:01:52,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:01:52,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:01:52,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:01:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:01:52,648 INFO L85 PathProgramCache]: Analyzing trace with hash 105319371, now seen corresponding path program 1 times [2022-12-14 08:01:52,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:01:52,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378729813] [2022-12-14 08:01:52,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:01:52,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:01:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:01:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:01:52,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:01:52,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378729813] [2022-12-14 08:01:52,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378729813] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:01:52,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:01:52,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:01:52,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966744156] [2022-12-14 08:01:52,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:01:52,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:01:52,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:01:52,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:01:52,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:01:52,939 INFO L87 Difference]: Start difference. First operand 374 states and 584 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 08:01:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:01:54,563 INFO L93 Difference]: Finished difference Result 1210 states and 1926 transitions. [2022-12-14 08:01:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:01:54,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-12-14 08:01:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:01:54,569 INFO L225 Difference]: With dead ends: 1210 [2022-12-14 08:01:54,569 INFO L226 Difference]: Without dead ends: 852 [2022-12-14 08:01:54,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:01:54,573 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 1929 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:01:54,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1994 Valid, 781 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 08:01:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-12-14 08:01:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 755. [2022-12-14 08:01:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 526 states have (on average 1.5893536121673004) internal successors, (836), 556 states have internal predecessors, (836), 181 states have call successors, (181), 46 states have call predecessors, (181), 47 states have return successors, (183), 165 states have call predecessors, (183), 176 states have call successors, (183) [2022-12-14 08:01:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1200 transitions. [2022-12-14 08:01:54,630 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1200 transitions. Word has length 44 [2022-12-14 08:01:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:01:54,631 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1200 transitions. [2022-12-14 08:01:54,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 08:01:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1200 transitions. [2022-12-14 08:01:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 08:01:54,636 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:01:54,636 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:01:54,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:01:54,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:01:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:01:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash -218974947, now seen corresponding path program 1 times [2022-12-14 08:01:54,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:01:54,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659236330] [2022-12-14 08:01:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:01:54,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:01:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:01:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:01:54,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:01:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659236330] [2022-12-14 08:01:54,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659236330] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:01:54,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:01:54,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 08:01:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943930274] [2022-12-14 08:01:54,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:01:54,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:01:54,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:01:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:01:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:01:54,902 INFO L87 Difference]: Start difference. First operand 755 states and 1200 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 08:01:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:01:56,357 INFO L93 Difference]: Finished difference Result 2329 states and 3742 transitions. [2022-12-14 08:01:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:01:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 88 [2022-12-14 08:01:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:01:56,365 INFO L225 Difference]: With dead ends: 2329 [2022-12-14 08:01:56,365 INFO L226 Difference]: Without dead ends: 1591 [2022-12-14 08:01:56,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:01:56,368 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1129 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:01:56,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 1470 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2495 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 08:01:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2022-12-14 08:01:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1522. [2022-12-14 08:01:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1071 states have (on average 1.5938375350140057) internal successors, (1707), 1127 states have internal predecessors, (1707), 354 states have call successors, (354), 89 states have call predecessors, (354), 96 states have return successors, (381), 329 states have call predecessors, (381), 349 states have call successors, (381) [2022-12-14 08:01:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2442 transitions. [2022-12-14 08:01:56,440 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2442 transitions. Word has length 88 [2022-12-14 08:01:56,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:01:56,440 INFO L495 AbstractCegarLoop]: Abstraction has 1522 states and 2442 transitions. [2022-12-14 08:01:56,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 08:01:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2442 transitions. [2022-12-14 08:01:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 08:01:56,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:01:56,443 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:01:56,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:01:56,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:01:56,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:01:56,444 INFO L85 PathProgramCache]: Analyzing trace with hash -562546054, now seen corresponding path program 1 times [2022-12-14 08:01:56,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:01:56,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532125744] [2022-12-14 08:01:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:01:56,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:01:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:01:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:01:56,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:01:56,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532125744] [2022-12-14 08:01:56,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532125744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:01:56,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:01:56,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:01:56,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264851468] [2022-12-14 08:01:56,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:01:56,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:01:56,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:01:56,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:01:56,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:01:56,633 INFO L87 Difference]: Start difference. First operand 1522 states and 2442 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 08:01:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:01:57,019 INFO L93 Difference]: Finished difference Result 1621 states and 2604 transitions. [2022-12-14 08:01:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:01:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 92 [2022-12-14 08:01:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:01:57,027 INFO L225 Difference]: With dead ends: 1621 [2022-12-14 08:01:57,027 INFO L226 Difference]: Without dead ends: 1606 [2022-12-14 08:01:57,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:01:57,029 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 677 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:01:57,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1446 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:01:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-12-14 08:01:57,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1528. [2022-12-14 08:01:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1077 states have (on average 1.5905292479108635) internal successors, (1713), 1133 states have internal predecessors, (1713), 354 states have call successors, (354), 89 states have call predecessors, (354), 96 states have return successors, (381), 329 states have call predecessors, (381), 349 states have call successors, (381) [2022-12-14 08:01:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 2448 transitions. [2022-12-14 08:01:57,144 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 2448 transitions. Word has length 92 [2022-12-14 08:01:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:01:57,144 INFO L495 AbstractCegarLoop]: Abstraction has 1528 states and 2448 transitions. [2022-12-14 08:01:57,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 08:01:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 2448 transitions. [2022-12-14 08:01:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 08:01:57,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:01:57,148 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:01:57,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:01:57,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:01:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:01:57,148 INFO L85 PathProgramCache]: Analyzing trace with hash -608661142, now seen corresponding path program 1 times [2022-12-14 08:01:57,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:01:57,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56355249] [2022-12-14 08:01:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:01:57,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:01:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:01:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:01:57,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:01:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56355249] [2022-12-14 08:01:57,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56355249] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:01:57,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:01:57,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 08:01:57,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776472108] [2022-12-14 08:01:57,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:01:57,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:01:57,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:01:57,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:01:57,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:01:57,382 INFO L87 Difference]: Start difference. First operand 1528 states and 2448 transitions. Second operand has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 08:01:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:01:57,846 INFO L93 Difference]: Finished difference Result 1688 states and 2684 transitions. [2022-12-14 08:01:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:01:57,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 97 [2022-12-14 08:01:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:01:57,857 INFO L225 Difference]: With dead ends: 1688 [2022-12-14 08:01:57,858 INFO L226 Difference]: Without dead ends: 1673 [2022-12-14 08:01:57,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:01:57,860 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 613 mSDsluCounter, 2112 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 2668 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:01:57,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 2668 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:01:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-12-14 08:01:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1624. [2022-12-14 08:01:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1149 states have (on average 1.5848563968668408) internal successors, (1821), 1205 states have internal predecessors, (1821), 370 states have call successors, (370), 97 states have call predecessors, (370), 104 states have return successors, (405), 345 states have call predecessors, (405), 365 states have call successors, (405) [2022-12-14 08:01:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2596 transitions. [2022-12-14 08:01:57,975 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2596 transitions. Word has length 97 [2022-12-14 08:01:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:01:57,975 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2596 transitions. [2022-12-14 08:01:57,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 08:01:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2596 transitions. [2022-12-14 08:01:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 08:01:57,978 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:01:57,979 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:01:57,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:01:57,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:01:57,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:01:57,979 INFO L85 PathProgramCache]: Analyzing trace with hash 414962573, now seen corresponding path program 1 times [2022-12-14 08:01:57,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:01:57,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138187889] [2022-12-14 08:01:57,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:01:57,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:01:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:01:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:01:58,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:01:58,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138187889] [2022-12-14 08:01:58,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138187889] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:01:58,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:01:58,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 08:01:58,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692950319] [2022-12-14 08:01:58,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:01:58,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:01:58,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:01:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:01:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:01:58,300 INFO L87 Difference]: Start difference. First operand 1624 states and 2596 transitions. Second operand has 9 states, 7 states have (on average 8.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2022-12-14 08:02:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:00,265 INFO L93 Difference]: Finished difference Result 4028 states and 6428 transitions. [2022-12-14 08:02:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 08:02:00,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 103 [2022-12-14 08:02:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:00,274 INFO L225 Difference]: With dead ends: 4028 [2022-12-14 08:02:00,274 INFO L226 Difference]: Without dead ends: 2420 [2022-12-14 08:02:00,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-12-14 08:02:00,279 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 950 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 4826 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 2524 SdHoareTripleChecker+Invalid, 5175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 4826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:00,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 2524 Invalid, 5175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 4826 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 08:02:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-12-14 08:02:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2361. [2022-12-14 08:02:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 1655 states have (on average 1.5691842900302115) internal successors, (2597), 1733 states have internal predecessors, (2597), 543 states have call successors, (543), 143 states have call predecessors, (543), 162 states have return successors, (598), 517 states have call predecessors, (598), 538 states have call successors, (598) [2022-12-14 08:02:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 3738 transitions. [2022-12-14 08:02:00,386 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 3738 transitions. Word has length 103 [2022-12-14 08:02:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:00,386 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 3738 transitions. [2022-12-14 08:02:00,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2022-12-14 08:02:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 3738 transitions. [2022-12-14 08:02:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 08:02:00,388 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:00,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:02:00,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:02:00,389 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:00,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2100991702, now seen corresponding path program 1 times [2022-12-14 08:02:00,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:00,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585848495] [2022-12-14 08:02:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:00,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:02:00,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:00,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585848495] [2022-12-14 08:02:00,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585848495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:00,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:02:00,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:02:00,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930111135] [2022-12-14 08:02:00,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:00,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:02:00,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:00,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:02:00,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:02:00,480 INFO L87 Difference]: Start difference. First operand 2361 states and 3738 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 08:02:00,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:00,770 INFO L93 Difference]: Finished difference Result 6053 states and 9675 transitions. [2022-12-14 08:02:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:02:00,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 104 [2022-12-14 08:02:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:00,792 INFO L225 Difference]: With dead ends: 6053 [2022-12-14 08:02:00,792 INFO L226 Difference]: Without dead ends: 3708 [2022-12-14 08:02:00,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:02:00,802 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 540 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:00,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1196 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:02:00,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2022-12-14 08:02:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 3668. [2022-12-14 08:02:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 2580 states have (on average 1.563953488372093) internal successors, (4035), 2705 states have internal predecessors, (4035), 835 states have call successors, (835), 219 states have call predecessors, (835), 252 states have return successors, (968), 791 states have call predecessors, (968), 830 states have call successors, (968) [2022-12-14 08:02:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 5838 transitions. [2022-12-14 08:02:01,012 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 5838 transitions. Word has length 104 [2022-12-14 08:02:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:01,012 INFO L495 AbstractCegarLoop]: Abstraction has 3668 states and 5838 transitions. [2022-12-14 08:02:01,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 08:02:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 5838 transitions. [2022-12-14 08:02:01,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 08:02:01,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:01,015 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:02:01,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 08:02:01,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:01,016 INFO L85 PathProgramCache]: Analyzing trace with hash -706510549, now seen corresponding path program 1 times [2022-12-14 08:02:01,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:01,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372214850] [2022-12-14 08:02:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:01,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:02:01,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:01,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372214850] [2022-12-14 08:02:01,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372214850] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:01,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:02:01,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:02:01,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278656157] [2022-12-14 08:02:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:01,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:02:01,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:01,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:02:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:02:01,108 INFO L87 Difference]: Start difference. First operand 3668 states and 5838 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 08:02:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:01,507 INFO L93 Difference]: Finished difference Result 9973 states and 16102 transitions. [2022-12-14 08:02:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:02:01,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2022-12-14 08:02:01,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:01,552 INFO L225 Difference]: With dead ends: 9973 [2022-12-14 08:02:01,552 INFO L226 Difference]: Without dead ends: 6324 [2022-12-14 08:02:01,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:02:01,565 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 539 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:01,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1202 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:02:01,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6324 states. [2022-12-14 08:02:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6324 to 6283. [2022-12-14 08:02:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6283 states, 4431 states have (on average 1.5590160234709998) internal successors, (6908), 4650 states have internal predecessors, (6908), 1419 states have call successors, (1419), 371 states have call predecessors, (1419), 432 states have return successors, (1778), 1339 states have call predecessors, (1778), 1414 states have call successors, (1778) [2022-12-14 08:02:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 10105 transitions. [2022-12-14 08:02:01,875 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 10105 transitions. Word has length 105 [2022-12-14 08:02:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:01,875 INFO L495 AbstractCegarLoop]: Abstraction has 6283 states and 10105 transitions. [2022-12-14 08:02:01,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 08:02:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 10105 transitions. [2022-12-14 08:02:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 08:02:01,878 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:01,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:02:01,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 08:02:01,878 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:01,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:01,878 INFO L85 PathProgramCache]: Analyzing trace with hash -427263860, now seen corresponding path program 1 times [2022-12-14 08:02:01,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:01,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728366385] [2022-12-14 08:02:01,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:01,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:02:01,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:01,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728366385] [2022-12-14 08:02:01,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728366385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:01,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:02:01,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:02:01,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938969833] [2022-12-14 08:02:01,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:01,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:02:01,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:01,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:02:01,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:02:01,947 INFO L87 Difference]: Start difference. First operand 6283 states and 10105 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 08:02:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:02,634 INFO L93 Difference]: Finished difference Result 17814 states and 29324 transitions. [2022-12-14 08:02:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:02:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 106 [2022-12-14 08:02:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:02,683 INFO L225 Difference]: With dead ends: 17814 [2022-12-14 08:02:02,683 INFO L226 Difference]: Without dead ends: 11556 [2022-12-14 08:02:02,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:02:02,705 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 538 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:02,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1208 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:02:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11556 states. [2022-12-14 08:02:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11556 to 11514. [2022-12-14 08:02:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11514 states, 8134 states have (on average 1.5539709859847552) internal successors, (12640), 8541 states have internal predecessors, (12640), 2587 states have call successors, (2587), 675 states have call predecessors, (2587), 792 states have return successors, (3662), 2435 states have call predecessors, (3662), 2582 states have call successors, (3662) [2022-12-14 08:02:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11514 states to 11514 states and 18889 transitions. [2022-12-14 08:02:03,382 INFO L78 Accepts]: Start accepts. Automaton has 11514 states and 18889 transitions. Word has length 106 [2022-12-14 08:02:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:03,382 INFO L495 AbstractCegarLoop]: Abstraction has 11514 states and 18889 transitions. [2022-12-14 08:02:03,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 08:02:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 11514 states and 18889 transitions. [2022-12-14 08:02:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 08:02:03,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:03,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:02:03,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:02:03,386 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash -360547187, now seen corresponding path program 1 times [2022-12-14 08:02:03,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:03,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984482003] [2022-12-14 08:02:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:02:03,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:03,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984482003] [2022-12-14 08:02:03,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984482003] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:03,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:02:03,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:02:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832661307] [2022-12-14 08:02:03,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:03,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:02:03,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:02:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:02:03,495 INFO L87 Difference]: Start difference. First operand 11514 states and 18889 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 08:02:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:04,489 INFO L93 Difference]: Finished difference Result 33497 states and 57073 transitions. [2022-12-14 08:02:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:02:04,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2022-12-14 08:02:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:04,576 INFO L225 Difference]: With dead ends: 33497 [2022-12-14 08:02:04,576 INFO L226 Difference]: Without dead ends: 22020 [2022-12-14 08:02:04,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:02:04,607 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 537 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:04,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1214 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:02:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22020 states. [2022-12-14 08:02:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22020 to 21977. [2022-12-14 08:02:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21977 states, 15541 states have (on average 1.548677691268258) internal successors, (24068), 16324 states have internal predecessors, (24068), 4923 states have call successors, (4923), 1283 states have call predecessors, (4923), 1512 states have return successors, (8366), 4627 states have call predecessors, (8366), 4918 states have call successors, (8366) [2022-12-14 08:02:06,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21977 states to 21977 states and 37357 transitions. [2022-12-14 08:02:06,099 INFO L78 Accepts]: Start accepts. Automaton has 21977 states and 37357 transitions. Word has length 107 [2022-12-14 08:02:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:06,100 INFO L495 AbstractCegarLoop]: Abstraction has 21977 states and 37357 transitions. [2022-12-14 08:02:06,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 08:02:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 21977 states and 37357 transitions. [2022-12-14 08:02:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 08:02:06,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:06,103 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:02:06,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:02:06,103 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:06,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1707673582, now seen corresponding path program 1 times [2022-12-14 08:02:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:06,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978939092] [2022-12-14 08:02:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:06,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:02:06,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:06,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978939092] [2022-12-14 08:02:06,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978939092] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:06,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:02:06,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:02:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358406911] [2022-12-14 08:02:06,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:06,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:02:06,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:02:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:02:06,187 INFO L87 Difference]: Start difference. First operand 21977 states and 37357 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 08:02:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:07,129 INFO L93 Difference]: Finished difference Result 23329 states and 39969 transitions. [2022-12-14 08:02:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:02:07,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 108 [2022-12-14 08:02:07,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:07,197 INFO L225 Difference]: With dead ends: 23329 [2022-12-14 08:02:07,198 INFO L226 Difference]: Without dead ends: 23318 [2022-12-14 08:02:07,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:02:07,206 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 523 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:07,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1212 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:02:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23318 states. [2022-12-14 08:02:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23318 to 23274. [2022-12-14 08:02:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23274 states, 16457 states have (on average 1.546575925138239) internal successors, (25452), 17287 states have internal predecessors, (25452), 5215 states have call successors, (5215), 1359 states have call predecessors, (5215), 1601 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2022-12-14 08:02:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23274 states to 23274 states and 39879 transitions. [2022-12-14 08:02:08,701 INFO L78 Accepts]: Start accepts. Automaton has 23274 states and 39879 transitions. Word has length 108 [2022-12-14 08:02:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:08,702 INFO L495 AbstractCegarLoop]: Abstraction has 23274 states and 39879 transitions. [2022-12-14 08:02:08,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 08:02:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 23274 states and 39879 transitions. [2022-12-14 08:02:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 08:02:08,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:08,709 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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 08:02:08,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 08:02:08,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:08,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1871549804, now seen corresponding path program 1 times [2022-12-14 08:02:08,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:08,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755829468] [2022-12-14 08:02:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:08,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 08:02:08,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:08,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755829468] [2022-12-14 08:02:08,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755829468] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:08,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:02:08,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:02:08,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840394809] [2022-12-14 08:02:08,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:08,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:02:08,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:08,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:02:08,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:02:08,878 INFO L87 Difference]: Start difference. First operand 23274 states and 39879 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-12-14 08:02:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:10,074 INFO L93 Difference]: Finished difference Result 47413 states and 83823 transitions. [2022-12-14 08:02:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:02:10,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 161 [2022-12-14 08:02:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:10,172 INFO L225 Difference]: With dead ends: 47413 [2022-12-14 08:02:10,172 INFO L226 Difference]: Without dead ends: 24156 [2022-12-14 08:02:10,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:02:10,250 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 30 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:10,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1627 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:02:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24156 states. [2022-12-14 08:02:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24156 to 23382. [2022-12-14 08:02:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23382 states, 16565 states have (on average 1.543012375490492) internal successors, (25560), 17395 states have internal predecessors, (25560), 5215 states have call successors, (5215), 1359 states have call predecessors, (5215), 1601 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2022-12-14 08:02:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23382 states to 23382 states and 39987 transitions. [2022-12-14 08:02:11,370 INFO L78 Accepts]: Start accepts. Automaton has 23382 states and 39987 transitions. Word has length 161 [2022-12-14 08:02:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:11,370 INFO L495 AbstractCegarLoop]: Abstraction has 23382 states and 39987 transitions. [2022-12-14 08:02:11,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-12-14 08:02:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 23382 states and 39987 transitions. [2022-12-14 08:02:11,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 08:02:11,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:11,375 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:11,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 08:02:11,375 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:11,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1986261748, now seen corresponding path program 1 times [2022-12-14 08:02:11,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:11,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422556971] [2022-12-14 08:02:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:11,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 08:02:11,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:11,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422556971] [2022-12-14 08:02:11,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422556971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:02:11,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362929853] [2022-12-14 08:02:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:11,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:11,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:02:11,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:02:11,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:02:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:11,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:02:11,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:02:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 08:02:11,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:02:11,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362929853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:11,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:02:11,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 08:02:11,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111372996] [2022-12-14 08:02:11,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:11,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:02:11,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:02:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:02:11,986 INFO L87 Difference]: Start difference. First operand 23382 states and 39987 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 08:02:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:13,185 INFO L93 Difference]: Finished difference Result 48151 states and 85662 transitions. [2022-12-14 08:02:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:02:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 164 [2022-12-14 08:02:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:13,290 INFO L225 Difference]: With dead ends: 48151 [2022-12-14 08:02:13,290 INFO L226 Difference]: Without dead ends: 24786 [2022-12-14 08:02:13,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:02:13,375 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 213 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:13,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1419 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:02:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24786 states. [2022-12-14 08:02:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24786 to 24786. [2022-12-14 08:02:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24786 states, 17933 states have (on average 1.5718507778955) internal successors, (28188), 18763 states have internal predecessors, (28188), 5215 states have call successors, (5215), 1395 states have call predecessors, (5215), 1637 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2022-12-14 08:02:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24786 states to 24786 states and 42615 transitions. [2022-12-14 08:02:15,184 INFO L78 Accepts]: Start accepts. Automaton has 24786 states and 42615 transitions. Word has length 164 [2022-12-14 08:02:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:15,184 INFO L495 AbstractCegarLoop]: Abstraction has 24786 states and 42615 transitions. [2022-12-14 08:02:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 08:02:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 24786 states and 42615 transitions. [2022-12-14 08:02:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 08:02:15,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:15,191 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:15,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:02:15,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:15,392 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2030448638, now seen corresponding path program 1 times [2022-12-14 08:02:15,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:15,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020856623] [2022-12-14 08:02:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:15,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 08:02:15,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:15,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020856623] [2022-12-14 08:02:15,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020856623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:02:15,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785366606] [2022-12-14 08:02:15,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:15,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:15,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:02:15,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:02:15,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:02:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:02:15,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:02:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 08:02:15,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:02:15,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785366606] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:15,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:02:15,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 08:02:15,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66215474] [2022-12-14 08:02:15,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:15,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:02:15,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:15,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:02:15,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:02:15,938 INFO L87 Difference]: Start difference. First operand 24786 states and 42615 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 08:02:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:17,049 INFO L93 Difference]: Finished difference Result 50959 states and 90813 transitions. [2022-12-14 08:02:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:02:17,050 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), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 169 [2022-12-14 08:02:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:17,145 INFO L225 Difference]: With dead ends: 50959 [2022-12-14 08:02:17,145 INFO L226 Difference]: Without dead ends: 26190 [2022-12-14 08:02:17,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:02:17,218 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 211 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:17,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1419 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:02:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26190 states. [2022-12-14 08:02:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26190 to 26190. [2022-12-14 08:02:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26190 states, 19301 states have (on average 1.596601212372416) internal successors, (30816), 20131 states have internal predecessors, (30816), 5215 states have call successors, (5215), 1431 states have call predecessors, (5215), 1673 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2022-12-14 08:02:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26190 states to 26190 states and 45243 transitions. [2022-12-14 08:02:18,367 INFO L78 Accepts]: Start accepts. Automaton has 26190 states and 45243 transitions. Word has length 169 [2022-12-14 08:02:18,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:18,368 INFO L495 AbstractCegarLoop]: Abstraction has 26190 states and 45243 transitions. [2022-12-14 08:02:18,368 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), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 08:02:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 26190 states and 45243 transitions. [2022-12-14 08:02:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 08:02:18,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:18,372 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:18,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:02:18,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:18,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:18,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1087451454, now seen corresponding path program 1 times [2022-12-14 08:02:18,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:18,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674593878] [2022-12-14 08:02:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:18,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 08:02:18,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674593878] [2022-12-14 08:02:18,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674593878] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:02:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592110543] [2022-12-14 08:02:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:18,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:18,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:02:18,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:02:18,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:02:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:19,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:02:19,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:02:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:02:19,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:02:19,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592110543] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:19,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:02:19,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 08:02:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016078152] [2022-12-14 08:02:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:19,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:02:19,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:02:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:02:19,044 INFO L87 Difference]: Start difference. First operand 26190 states and 45243 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 08:02:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:20,123 INFO L93 Difference]: Finished difference Result 53767 states and 95964 transitions. [2022-12-14 08:02:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:02:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 173 [2022-12-14 08:02:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:20,230 INFO L225 Difference]: With dead ends: 53767 [2022-12-14 08:02:20,230 INFO L226 Difference]: Without dead ends: 27594 [2022-12-14 08:02:20,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:02:20,312 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 209 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:20,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1419 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:02:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27594 states. [2022-12-14 08:02:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27594 to 27594. [2022-12-14 08:02:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27594 states, 20669 states have (on average 1.6180753785862887) internal successors, (33444), 21499 states have internal predecessors, (33444), 5215 states have call successors, (5215), 1467 states have call predecessors, (5215), 1709 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2022-12-14 08:02:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27594 states to 27594 states and 47871 transitions. [2022-12-14 08:02:21,489 INFO L78 Accepts]: Start accepts. Automaton has 27594 states and 47871 transitions. Word has length 173 [2022-12-14 08:02:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:21,489 INFO L495 AbstractCegarLoop]: Abstraction has 27594 states and 47871 transitions. [2022-12-14 08:02:21,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 08:02:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 27594 states and 47871 transitions. [2022-12-14 08:02:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 08:02:21,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:21,494 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:21,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:02:21,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 08:02:21,696 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1536286996, now seen corresponding path program 1 times [2022-12-14 08:02:21,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:21,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148903247] [2022-12-14 08:02:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:21,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 08:02:23,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:23,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148903247] [2022-12-14 08:02:23,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148903247] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:02:23,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72582250] [2022-12-14 08:02:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:23,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:23,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:02:23,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:02:23,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:02:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:23,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:02:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:02:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 08:02:23,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:02:23,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72582250] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:23,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:02:23,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2022-12-14 08:02:23,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097367195] [2022-12-14 08:02:23,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:23,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:02:23,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:23,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:02:23,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-12-14 08:02:23,475 INFO L87 Difference]: Start difference. First operand 27594 states and 47871 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 08:02:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:24,937 INFO L93 Difference]: Finished difference Result 56575 states and 101115 transitions. [2022-12-14 08:02:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:02:24,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 176 [2022-12-14 08:02:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:25,042 INFO L225 Difference]: With dead ends: 56575 [2022-12-14 08:02:25,042 INFO L226 Difference]: Without dead ends: 28998 [2022-12-14 08:02:25,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-12-14 08:02:25,119 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 207 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:25,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1419 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:02:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28998 states. [2022-12-14 08:02:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28998 to 28998. [2022-12-14 08:02:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28998 states, 22037 states have (on average 1.6368834233334846) internal successors, (36072), 22867 states have internal predecessors, (36072), 5215 states have call successors, (5215), 1503 states have call predecessors, (5215), 1745 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2022-12-14 08:02:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28998 states to 28998 states and 50499 transitions. [2022-12-14 08:02:26,337 INFO L78 Accepts]: Start accepts. Automaton has 28998 states and 50499 transitions. Word has length 176 [2022-12-14 08:02:26,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:26,337 INFO L495 AbstractCegarLoop]: Abstraction has 28998 states and 50499 transitions. [2022-12-14 08:02:26,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 08:02:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 28998 states and 50499 transitions. [2022-12-14 08:02:26,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 08:02:26,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:26,342 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:02:26,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 08:02:26,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 08:02:26,544 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:26,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1392494786, now seen corresponding path program 1 times [2022-12-14 08:02:26,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:26,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137769697] [2022-12-14 08:02:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:26,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 08:02:27,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:27,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137769697] [2022-12-14 08:02:27,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137769697] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:02:27,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023612221] [2022-12-14 08:02:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:27,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:02:27,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:02:27,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:02:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:28,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 2140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:02:28,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:02:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 08:02:28,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:02:28,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023612221] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:28,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:02:28,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2022-12-14 08:02:28,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131085191] [2022-12-14 08:02:28,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:28,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:02:28,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:02:28,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-12-14 08:02:28,247 INFO L87 Difference]: Start difference. First operand 28998 states and 50499 transitions. Second operand has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-12-14 08:02:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:29,723 INFO L93 Difference]: Finished difference Result 59635 states and 104328 transitions. [2022-12-14 08:02:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:02:29,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 178 [2022-12-14 08:02:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:29,812 INFO L225 Difference]: With dead ends: 59635 [2022-12-14 08:02:29,812 INFO L226 Difference]: Without dead ends: 30699 [2022-12-14 08:02:29,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-12-14 08:02:29,860 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 320 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:29,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 2649 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:02:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30699 states. [2022-12-14 08:02:30,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30699 to 30499. [2022-12-14 08:02:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30499 states, 23026 states have (on average 1.6196039259966994) internal successors, (37293), 23900 states have internal predecessors, (37293), 5528 states have call successors, (5528), 1712 states have call predecessors, (5528), 1944 states have return successors, (10283), 5159 states have call predecessors, (10283), 5523 states have call successors, (10283) [2022-12-14 08:02:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30499 states to 30499 states and 53104 transitions. [2022-12-14 08:02:31,081 INFO L78 Accepts]: Start accepts. Automaton has 30499 states and 53104 transitions. Word has length 178 [2022-12-14 08:02:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:31,081 INFO L495 AbstractCegarLoop]: Abstraction has 30499 states and 53104 transitions. [2022-12-14 08:02:31,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-12-14 08:02:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 30499 states and 53104 transitions. [2022-12-14 08:02:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 08:02:31,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:31,087 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:31,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:02:31,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:31,289 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1263861924, now seen corresponding path program 1 times [2022-12-14 08:02:31,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:31,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371734945] [2022-12-14 08:02:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:31,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 08:02:32,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371734945] [2022-12-14 08:02:32,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371734945] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:02:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001806697] [2022-12-14 08:02:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:32,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:32,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:02:32,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:02:32,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:02:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:32,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:02:32,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:02:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 08:02:32,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:02:32,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001806697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:02:32,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:02:32,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2022-12-14 08:02:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465819218] [2022-12-14 08:02:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:02:32,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:02:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:02:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:02:32,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-12-14 08:02:32,802 INFO L87 Difference]: Start difference. First operand 30499 states and 53104 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) [2022-12-14 08:02:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:02:33,865 INFO L93 Difference]: Finished difference Result 32037 states and 59742 transitions. [2022-12-14 08:02:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:02:33,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) Word has length 181 [2022-12-14 08:02:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:02:34,001 INFO L225 Difference]: With dead ends: 32037 [2022-12-14 08:02:34,001 INFO L226 Difference]: Without dead ends: 31951 [2022-12-14 08:02:34,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-12-14 08:02:34,025 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 47 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:02:34,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1696 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:02:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31951 states. [2022-12-14 08:02:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31951 to 30691. [2022-12-14 08:02:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30691 states, 23218 states have (on average 1.614480144715307) internal successors, (37485), 24092 states have internal predecessors, (37485), 5528 states have call successors, (5528), 1712 states have call predecessors, (5528), 1944 states have return successors, (10283), 5159 states have call predecessors, (10283), 5523 states have call successors, (10283) [2022-12-14 08:02:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30691 states to 30691 states and 53296 transitions. [2022-12-14 08:02:35,420 INFO L78 Accepts]: Start accepts. Automaton has 30691 states and 53296 transitions. Word has length 181 [2022-12-14 08:02:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:02:35,420 INFO L495 AbstractCegarLoop]: Abstraction has 30691 states and 53296 transitions. [2022-12-14 08:02:35,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) [2022-12-14 08:02:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 30691 states and 53296 transitions. [2022-12-14 08:02:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-12-14 08:02:35,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:02:35,426 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 5, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:02:35,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 08:02:35,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 08:02:35,628 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:02:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:02:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash 142149429, now seen corresponding path program 1 times [2022-12-14 08:02:35,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:02:35,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902062113] [2022-12-14 08:02:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:35,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:02:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-12-14 08:02:35,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:02:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902062113] [2022-12-14 08:02:35,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902062113] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:02:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567694958] [2022-12-14 08:02:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:02:35,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:02:35,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:02:35,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:02:35,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:02:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:02:36,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 2935 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:02:36,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:02:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-12-14 08:02:36,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:02:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-12-14 08:02:36,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567694958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:02:36,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [464842384] [2022-12-14 08:02:36,882 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 08:02:36,882 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:02:36,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:02:36,888 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:02:36,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:02:44,716 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 422 for LOIs [2022-12-14 08:02:44,777 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 598 for LOIs [2022-12-14 08:04:41,842 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 727 for LOIs [2022-12-14 08:04:46,825 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 199 for LOIs [2022-12-14 08:04:49,134 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 38 for LOIs [2022-12-14 08:04:49,162 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 74 for LOIs [2022-12-14 08:04:49,324 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 39 for LOIs [2022-12-14 08:04:49,386 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 40 for LOIs [2022-12-14 08:04:49,395 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 55 for LOIs [2022-12-14 08:04:49,400 INFO L197 IcfgInterpreter]: Interpreting procedure enterElevator with input of size 67 for LOIs [2022-12-14 08:04:49,588 INFO L197 IcfgInterpreter]: Interpreting procedure pressInLiftFloorButton with input of size 81 for LOIs [2022-12-14 08:04:49,614 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 26 for LOIs [2022-12-14 08:04:49,616 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 589 for LOIs [2022-12-14 08:04:52,955 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 593 for LOIs [2022-12-14 08:04:53,523 INFO L197 IcfgInterpreter]: Interpreting procedure isEmpty with input of size 32 for LOIs [2022-12-14 08:04:53,532 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 34 for LOIs [2022-12-14 08:04:53,534 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 53 for LOIs [2022-12-14 08:04:53,545 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 52 for LOIs [2022-12-14 08:04:53,557 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 521 for LOIs [2022-12-14 08:04:53,701 INFO L197 IcfgInterpreter]: Interpreting procedure removePersonFromFloor with input of size 162 for LOIs [2022-12-14 08:04:54,622 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 69 for LOIs [2022-12-14 08:04:54,639 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:05:30,718 WARN L233 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 727 DAG size of output: 626 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:06:13,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '979114#(and (= (select (select |#memory_int| 23) 0) 32) (= (select |#length| 32) 30) (= 6 (select |#length| 18)) (= 116 (select (select |#memory_int| 7) 2)) (= (select |#valid| 30) 1) (= (select (select |#memory_int| 20) 1) 37) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (= (select |#length| 21) 4) (= (select (select |#memory_int| 21) 1) 37) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 23) 1) 37) (= (select (select |#memory_int| 20) 3) 0) (= (select (select |#memory_int| 22) 3) 0) (= (select (select |#memory_int| 5) 3) 0) (= 4 (select |#length| 16)) (= 3 (select |#length| 10)) (= (select |#length| 37) 25) (= (select (select |#memory_int| 22) 0) 32) (= (select (select |#memory_int| 13) 3) 0) (= (select |#valid| 26) 1) (= (select |#length| 4) 10) (= 9 (select |#length| 30)) (= (select |#length| 8) 3) (= (select |#length| 6) 4) (= (select (select |#memory_int| 13) 1) 37) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 18) 5) 0) (= (select (select |#memory_int| 20) 0) 32) (= 25 (select |#length| 34)) (= (select (select |#memory_int| 6) 0) 91) (= (select |#valid| 11) 1) (= (select |#length| 9) 10) (= (select |#valid| 27) 1) (= 9 (select |#length| 36)) (= (select (select |#memory_int| 8) 0) 37) (= (select |#valid| 33) 1) (= 73 (select (select |#memory_int| 12) 1)) (= (select (select |#memory_int| 22) 1) 37) (<= ~currentFloorID~0 2147483647) (= (select (select |#memory_int| 23) 2) 105) (= (select (select |#memory_int| 10) 0) 117) (= (select (select |#memory_int| 19) 2) 105) (= 9 (select |#length| 25)) (= (select |#length| 15) 4) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 19) 1) 37) (= ~head~0.offset 0) (= 7 (select |#length| 12)) (= (select (select |#memory_int| 22) 2) 105) (= 2 (select |#length| 1)) (= (select (select |#memory_int| 16) 2) 105) (= (select (select |#memory_int| 17) 2) 105) (= (select |#length| 19) 4) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select (select |#memory_int| 18) 4) 58) (= (select |#valid| 18) 1) (= 91 (select (select |#memory_int| 5) 0)) (= (select |#valid| 22) 1) (= 30 (select |#length| 26)) (= 70 (select (select |#memory_int| 18) 1)) (= 5 (select |#length| 7)) (= (select |#valid| 24) 1) (= (select (select |#memory_int| 19) 3) 0) (= 32 (select (select |#memory_int| 7) 0)) (= (select (select |#memory_int| 17) 3) 0) (= (select (select |#memory_int| 5) 1) 95) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select |#valid| 28) 1) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 13) 2) 105) (= 112 (select (select |#memory_int| 12) 4)) (= (select |#valid| 4) 1) (= (select (select |#memory_int| 16) 1) 37) (= (select (select |#memory_int| 20) 2) 105) (= 112 (select (select |#memory_int| 10) 1)) (= (select (select |#memory_int| 8) 2) 0) (= (select (select |#memory_int| 21) 2) 105) (= 0 (select (select |#memory_int| 7) 4)) (= (select |#length| 13) 4) (= 5 (select |#length| 11)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (not (= 0 ~floorButtons_spc9_1~0)) (= (select |#length| 24) 2) (= ~doorState~0 1) (= (select (select |#memory_int| 12) 6) 0) (= 0 ~floorButtons_spc9_0~0) (= (select |#valid| 21) 1) (= (select (select |#memory_int| 11) 0) 100) (= (select (select |#memory_int| 24) 0) 10) (= 97 (select (select |#memory_int| 7) 1)) (= (select (select |#memory_int| 15) 1) 37) (= (select |#length| 5) 4) (= (select |#valid| 14) 1) (= 112 (select (select |#memory_int| 18) 3)) (= 119 (select (select |#memory_int| 11) 2)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 12) 5) 58) (= (select (select |#memory_int| 16) 0) 32) (= (select |#valid| 25) 1) (= ~head~0.base 0) (= (select (select |#memory_int| 14) 3) 0) (= (select (select |#memory_int| 23) 3) 0) (= 95 (select (select |#memory_int| 12) 3)) (= 105 (select (select |#memory_int| 14) 2)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 14) 1) 37) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= (select (select |#memory_int| 10) 2) 0) (= (select |#length| 33) 9) (= (select |#length| 27) 9) (= (select (select |#memory_int| 1) 0) 48) (= ~blocked~0 0) (= (select (select |#memory_int| 11) 1) 111) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 7) 3)) (= 30 (select |#length| 35)) (= 4 (select |#length| 23)) (= (select (select |#memory_int| 24) 1) 0) (= (select |#length| 20) 4) (= (select (select |#memory_int| 21) 3) 0) (= 76 (select (select |#memory_int| 12) 2)) (= (select |#valid| 19) 1) (= (select (select |#memory_int| 15) 0) 32) (= 32 (select (select |#memory_int| 13) 0)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 6) 3) 0) (= (select |#valid| 16) 1) (= (select (select |#memory_int| 15) 2) 105) (= 32 (select (select |#memory_int| 17) 0)) (= 21 (select |#length| 31)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 15) 3) 0) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 5) 2) 93) (= (select |#length| 28) 21) (= (select (select |#memory_int| 14) 0) 32) (= (select |#valid| 29) 1) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 6) 2) 32) (= 32 (select (select |#memory_int| 12) 0)) (= (select |#valid| 17) 1) (= (select (select |#memory_int| 16) 3) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select (select |#memory_int| 11) 4) 0) (= 32 (select (select |#memory_int| 19) 0)) (= (select (select |#memory_int| 18) 2) 95) (= 4 (select |#length| 14)) (= 30 (select |#length| 29)) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select |#length| 22) 4) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 18) 0)) (= (select (select |#memory_int| 8) 1) 105) (= (select (select |#memory_int| 11) 3) 110) (= 32 (select (select |#memory_int| 21) 0)))' at error location [2022-12-14 08:06:13,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:06:13,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:06:13,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 17 [2022-12-14 08:06:13,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453222940] [2022-12-14 08:06:13,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:06:13,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:06:13,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:06:13,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:06:13,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1209, Invalid=15821, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 08:06:13,371 INFO L87 Difference]: Start difference. First operand 30691 states and 53296 transitions. Second operand has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 17 states have internal predecessors, (257), 10 states have call successors, (80), 4 states have call predecessors, (80), 6 states have return successors, (79), 10 states have call predecessors, (79), 9 states have call successors, (79) [2022-12-14 08:06:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:06:20,256 INFO L93 Difference]: Finished difference Result 83332 states and 179529 transitions. [2022-12-14 08:06:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 08:06:20,257 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 17 states have internal predecessors, (257), 10 states have call successors, (80), 4 states have call predecessors, (80), 6 states have return successors, (79), 10 states have call predecessors, (79), 9 states have call successors, (79) Word has length 300 [2022-12-14 08:06:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:06:20,564 INFO L225 Difference]: With dead ends: 83332 [2022-12-14 08:06:20,565 INFO L226 Difference]: Without dead ends: 49831 [2022-12-14 08:06:20,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 781 SyntacticMatches, 12 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10340 ImplicationChecksByTransitivity, 79.8s TimeCoverageRelationStatistics Valid=1529, Invalid=22963, Unknown=0, NotChecked=0, Total=24492 [2022-12-14 08:06:20,747 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 3450 mSDsluCounter, 2067 mSDsCounter, 0 mSdLazyCounter, 5994 mSolverCounterSat, 1931 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 2456 SdHoareTripleChecker+Invalid, 7925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1931 IncrementalHoareTripleChecker+Valid, 5994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:06:20,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3459 Valid, 2456 Invalid, 7925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1931 Valid, 5994 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 08:06:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49831 states. [2022-12-14 08:06:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49831 to 43603. [2022-12-14 08:06:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43603 states, 32188 states have (on average 1.518857959488008) internal successors, (48889), 33363 states have internal predecessors, (48889), 8622 states have call successors, (8622), 2418 states have call predecessors, (8622), 2792 states have return successors, (22243), 8106 states have call predecessors, (22243), 8617 states have call successors, (22243) [2022-12-14 08:06:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43603 states to 43603 states and 79754 transitions. [2022-12-14 08:06:23,645 INFO L78 Accepts]: Start accepts. Automaton has 43603 states and 79754 transitions. Word has length 300 [2022-12-14 08:06:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:06:23,645 INFO L495 AbstractCegarLoop]: Abstraction has 43603 states and 79754 transitions. [2022-12-14 08:06:23,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 17 states have internal predecessors, (257), 10 states have call successors, (80), 4 states have call predecessors, (80), 6 states have return successors, (79), 10 states have call predecessors, (79), 9 states have call successors, (79) [2022-12-14 08:06:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 43603 states and 79754 transitions. [2022-12-14 08:06:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-12-14 08:06:23,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:06:23,655 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:06:23,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:06:23,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:06:23,857 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:06:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:06:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash 940366096, now seen corresponding path program 1 times [2022-12-14 08:06:23,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:06:23,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249384917] [2022-12-14 08:06:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:06:23,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:06:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:06:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-12-14 08:06:25,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:06:25,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249384917] [2022-12-14 08:06:25,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249384917] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:06:25,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123330730] [2022-12-14 08:06:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:06:25,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:06:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:06:25,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:06:25,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:06:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:06:25,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 2216 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:06:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:06:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 08:06:25,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:06:25,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123330730] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:06:25,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:06:25,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2022-12-14 08:06:25,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61710124] [2022-12-14 08:06:25,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:06:25,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:06:25,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:06:25,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:06:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-12-14 08:06:25,527 INFO L87 Difference]: Start difference. First operand 43603 states and 79754 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-12-14 08:06:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:06:27,768 INFO L93 Difference]: Finished difference Result 88711 states and 170736 transitions. [2022-12-14 08:06:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:06:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 204 [2022-12-14 08:06:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:06:27,990 INFO L225 Difference]: With dead ends: 88711 [2022-12-14 08:06:27,990 INFO L226 Difference]: Without dead ends: 45151 [2022-12-14 08:06:28,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-12-14 08:06:28,176 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 205 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:06:28,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1419 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:06:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45151 states. [2022-12-14 08:06:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45151 to 45151. [2022-12-14 08:06:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45151 states, 33664 states have (on average 1.530863830798479) internal successors, (51535), 34857 states have internal predecessors, (51535), 8622 states have call successors, (8622), 2472 states have call predecessors, (8622), 2864 states have return successors, (22243), 8106 states have call predecessors, (22243), 8617 states have call successors, (22243) [2022-12-14 08:06:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45151 states to 45151 states and 82400 transitions. [2022-12-14 08:06:30,723 INFO L78 Accepts]: Start accepts. Automaton has 45151 states and 82400 transitions. Word has length 204 [2022-12-14 08:06:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:06:30,723 INFO L495 AbstractCegarLoop]: Abstraction has 45151 states and 82400 transitions. [2022-12-14 08:06:30,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-12-14 08:06:30,723 INFO L276 IsEmpty]: Start isEmpty. Operand 45151 states and 82400 transitions. [2022-12-14 08:06:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-12-14 08:06:30,734 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:06:30,735 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:06:30,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:06:30,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 08:06:30,937 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:06:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:06:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash 491342652, now seen corresponding path program 1 times [2022-12-14 08:06:30,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:06:30,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6908038] [2022-12-14 08:06:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:06:30,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:06:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:06:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-12-14 08:06:32,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:06:32,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6908038] [2022-12-14 08:06:32,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6908038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:06:32,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462810272] [2022-12-14 08:06:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:06:32,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:06:32,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:06:32,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:06:32,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f6010-2e37-4cde-b148-2ea67e93ae7d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:06:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:06:32,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 2217 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 08:06:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:06:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-14 08:06:32,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:06:34,833 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 08:06:41,093 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 08:06:41,373 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 08:06:48,144 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 08:06:48,420 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 08:06:54,154 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 08:06:54,244 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 08:09:22,824 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-12-14 08:09:23,208 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 08:09:29,027 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.