./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.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_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/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_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/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_e3dc0882-8822-4407-93e4-7a25c38d380d/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 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 --- 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 06:46:19,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:46:19,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:46:19,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:46:19,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:46:19,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:46:19,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:46:19,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:46:19,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:46:19,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:46:19,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:46:19,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:46:19,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:46:19,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:46:19,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:46:19,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:46:19,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:46:19,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:46:19,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:46:19,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:46:19,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:46:19,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:46:19,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:46:19,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:46:19,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:46:19,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:46:19,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:46:19,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:46:19,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:46:19,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:46:19,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:46:19,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:46:19,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:46:19,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:46:19,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:46:19,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:46:19,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:46:19,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:46:19,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:46:19,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:46:19,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:46:19,265 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:46:19,292 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:46:19,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:46:19,293 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:46:19,293 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:46:19,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:46:19,294 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:46:19,294 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:46:19,298 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:46:19,299 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:46:19,299 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:46:19,299 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:46:19,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:46:19,299 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:46:19,299 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:46:19,299 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:46:19,300 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:46:19,300 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:46:19,300 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:46:19,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:46:19,301 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:46:19,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:46:19,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:46:19,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:46:19,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:46:19,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:46:19,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:46:19,302 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:46:19,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:46:19,302 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:46:19,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:46:19,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:46:19,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:46:19,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:46:19,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:46:19,303 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:46:19,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:46:19,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:46:19,304 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:46:19,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:46:19,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:46:19,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:46:19,304 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_e3dc0882-8822-4407-93e4-7a25c38d380d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 [2022-12-14 06:46:19,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:46:19,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:46:19,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:46:19,509 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:46:19,509 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:46:19,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2022-12-14 06:46:22,018 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:46:22,272 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:46:22,273 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2022-12-14 06:46:22,286 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/data/a2af63bff/75052533467842a4a8053ff096212e26/FLAG7d393a8d3 [2022-12-14 06:46:22,578 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/data/a2af63bff/75052533467842a4a8053ff096212e26 [2022-12-14 06:46:22,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:46:22,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:46:22,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:46:22,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:46:22,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:46:22,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:46:22" (1/1) ... [2022-12-14 06:46:22,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ba50db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:22, skipping insertion in model container [2022-12-14 06:46:22,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:46:22" (1/1) ... [2022-12-14 06:46:22,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:46:22,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:46:22,886 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_e3dc0882-8822-4407-93e4-7a25c38d380d/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2022-12-14 06:46:22,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:46:22,937 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:46:22,987 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_e3dc0882-8822-4407-93e4-7a25c38d380d/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2022-12-14 06:46:23,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:46:23,018 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:46:23,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23 WrapperNode [2022-12-14 06:46:23,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:46:23,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:46:23,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:46:23,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:46:23,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,070 INFO L138 Inliner]: procedures = 92, calls = 337, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1060 [2022-12-14 06:46:23,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:46:23,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:46:23,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:46:23,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:46:23,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,103 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:46:23,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:46:23,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:46:23,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:46:23,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (1/1) ... [2022-12-14 06:46:23,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:46:23,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:46:23,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:46:23,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:46:23,170 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-12-14 06:46:23,171 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-12-14 06:46:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:46:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 06:46:23,171 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 06:46:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 06:46:23,171 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 06:46:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 06:46:23,171 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 06:46:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 06:46:23,171 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 06:46:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 06:46:23,172 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 06:46:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 06:46:23,172 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 06:46:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 06:46:23,172 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 06:46:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 06:46:23,172 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 06:46:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 06:46:23,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 06:46:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 06:46:23,172 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 06:46:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 06:46:23,173 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 06:46:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 06:46:23,173 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 06:46:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 06:46:23,173 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 06:46:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 06:46:23,173 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 06:46:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 06:46:23,173 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 06:46:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 06:46:23,173 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 06:46:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 06:46:23,174 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 06:46:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 06:46:23,174 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 06:46:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-12-14 06:46:23,174 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-12-14 06:46:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:46:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 06:46:23,174 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 06:46:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 06:46:23,174 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 06:46:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 06:46:23,174 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 06:46:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:46:23,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:46:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 06:46:23,175 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 06:46:23,279 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:46:23,281 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:46:24,018 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:46:24,414 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:46:24,414 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 06:46:24,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:46:24 BoogieIcfgContainer [2022-12-14 06:46:24,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:46:24,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:46:24,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:46:24,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:46:24,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:46:22" (1/3) ... [2022-12-14 06:46:24,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31078d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:46:24, skipping insertion in model container [2022-12-14 06:46:24,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:46:23" (2/3) ... [2022-12-14 06:46:24,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31078d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:46:24, skipping insertion in model container [2022-12-14 06:46:24,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:46:24" (3/3) ... [2022-12-14 06:46:24,423 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product03.cil.c [2022-12-14 06:46:24,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:46:24,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:46:24,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:46:24,484 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;@47f77c2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:46:24,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:46:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 375 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2022-12-14 06:46:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 06:46:24,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:24,503 INFO L195 NwaCegarLoop]: trace histogram [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 06:46:24,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:24,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:24,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1055558019, now seen corresponding path program 1 times [2022-12-14 06:46:24,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:24,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924178044] [2022-12-14 06:46:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:24,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:24,808 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 06:46:24,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:24,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924178044] [2022-12-14 06:46:24,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924178044] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:24,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:46:24,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:46:24,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806186754] [2022-12-14 06:46:24,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:24,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 06:46:24,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 06:46:24,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:46:24,838 INFO L87 Difference]: Start difference. First operand has 375 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 06:46:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:24,955 INFO L93 Difference]: Finished difference Result 393 states and 623 transitions. [2022-12-14 06:46:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 06:46:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2022-12-14 06:46:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:24,967 INFO L225 Difference]: With dead ends: 393 [2022-12-14 06:46:24,967 INFO L226 Difference]: Without dead ends: 371 [2022-12-14 06:46:24,970 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 06:46:24,972 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:24,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 556 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:46:24,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-12-14 06:46:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-12-14 06:46:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 250 states have (on average 1.584) internal successors, (396), 269 states have internal predecessors, (396), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 06:46:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 585 transitions. [2022-12-14 06:46:25,022 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 585 transitions. Word has length 87 [2022-12-14 06:46:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:25,023 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 585 transitions. [2022-12-14 06:46:25,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 06:46:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 585 transitions. [2022-12-14 06:46:25,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 06:46:25,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:25,027 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 06:46:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:46:25,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1623414051, now seen corresponding path program 1 times [2022-12-14 06:46:25,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:25,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775502823] [2022-12-14 06:46:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:25,478 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 06:46:25,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:25,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775502823] [2022-12-14 06:46:25,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775502823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:25,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:46:25,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 06:46:25,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273735811] [2022-12-14 06:46:25,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:25,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:46:25,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:25,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:46:25,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:46:25,482 INFO L87 Difference]: Start difference. First operand 371 states and 585 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 06:46:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:27,381 INFO L93 Difference]: Finished difference Result 1255 states and 2013 transitions. [2022-12-14 06:46:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 06:46:27,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 88 [2022-12-14 06:46:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:27,389 INFO L225 Difference]: With dead ends: 1255 [2022-12-14 06:46:27,390 INFO L226 Difference]: Without dead ends: 907 [2022-12-14 06:46:27,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:46:27,395 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1956 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2022 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 3595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:27,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2022 Valid, 2141 Invalid, 3595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 06:46:27,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-12-14 06:46:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 849. [2022-12-14 06:46:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 594 states have (on average 1.6094276094276094) internal successors, (956), 629 states have internal predecessors, (956), 204 states have call successors, (204), 48 states have call predecessors, (204), 50 states have return successors, (205), 196 states have call predecessors, (205), 199 states have call successors, (205) [2022-12-14 06:46:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1365 transitions. [2022-12-14 06:46:27,476 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1365 transitions. Word has length 88 [2022-12-14 06:46:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:27,477 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1365 transitions. [2022-12-14 06:46:27,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 06:46:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1365 transitions. [2022-12-14 06:46:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 06:46:27,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:27,480 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:46:27,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:46:27,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:27,480 INFO L85 PathProgramCache]: Analyzing trace with hash -25160898, now seen corresponding path program 1 times [2022-12-14 06:46:27,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:27,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999521928] [2022-12-14 06:46:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:27,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:27,750 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 06:46:27,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:27,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999521928] [2022-12-14 06:46:27,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999521928] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:27,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:46:27,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:46:27,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689728866] [2022-12-14 06:46:27,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:27,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:46:27,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:27,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:46:27,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:46:27,753 INFO L87 Difference]: Start difference. First operand 849 states and 1365 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (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 06:46:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:29,075 INFO L93 Difference]: Finished difference Result 1476 states and 2376 transitions. [2022-12-14 06:46:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:46:29,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (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 89 [2022-12-14 06:46:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:29,081 INFO L225 Difference]: With dead ends: 1476 [2022-12-14 06:46:29,081 INFO L226 Difference]: Without dead ends: 974 [2022-12-14 06:46:29,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:46:29,085 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1142 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:29,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 1608 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 06:46:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-12-14 06:46:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 865. [2022-12-14 06:46:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 604 states have (on average 1.6026490066225165) internal successors, (968), 642 states have internal predecessors, (968), 206 states have call successors, (206), 51 states have call predecessors, (206), 54 states have return successors, (213), 196 states have call predecessors, (213), 201 states have call successors, (213) [2022-12-14 06:46:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1387 transitions. [2022-12-14 06:46:29,139 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1387 transitions. Word has length 89 [2022-12-14 06:46:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:29,139 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1387 transitions. [2022-12-14 06:46:29,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (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 06:46:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1387 transitions. [2022-12-14 06:46:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 06:46:29,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:29,141 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:46:29,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:46:29,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:29,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:29,142 INFO L85 PathProgramCache]: Analyzing trace with hash -731231985, now seen corresponding path program 1 times [2022-12-14 06:46:29,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:29,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746035857] [2022-12-14 06:46:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:29,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:29,299 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 06:46:29,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:29,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746035857] [2022-12-14 06:46:29,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746035857] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:29,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:46:29,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:46:29,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270056552] [2022-12-14 06:46:29,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:29,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:46:29,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:29,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:46:29,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:46:29,301 INFO L87 Difference]: Start difference. First operand 865 states and 1387 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 06:46:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:29,661 INFO L93 Difference]: Finished difference Result 936 states and 1499 transitions. [2022-12-14 06:46:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:46:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 93 [2022-12-14 06:46:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:29,668 INFO L225 Difference]: With dead ends: 936 [2022-12-14 06:46:29,669 INFO L226 Difference]: Without dead ends: 921 [2022-12-14 06:46:29,670 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 06:46:29,671 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 677 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:29,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1464 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:46:29,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-12-14 06:46:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 869. [2022-12-14 06:46:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 608 states have (on average 1.5986842105263157) internal successors, (972), 646 states have internal predecessors, (972), 206 states have call successors, (206), 51 states have call predecessors, (206), 54 states have return successors, (213), 196 states have call predecessors, (213), 201 states have call successors, (213) [2022-12-14 06:46:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1391 transitions. [2022-12-14 06:46:29,723 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1391 transitions. Word has length 93 [2022-12-14 06:46:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:29,723 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1391 transitions. [2022-12-14 06:46:29,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 06:46:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1391 transitions. [2022-12-14 06:46:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 06:46:29,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:29,725 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:46:29,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:46:29,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:29,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1212948083, now seen corresponding path program 1 times [2022-12-14 06:46:29,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:29,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137013150] [2022-12-14 06:46:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:29,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:29,938 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 06:46:29,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:29,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137013150] [2022-12-14 06:46:29,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137013150] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:29,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:46:29,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:46:29,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444080389] [2022-12-14 06:46:29,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:29,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:46:29,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:29,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:46:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:46:29,939 INFO L87 Difference]: Start difference. First operand 869 states and 1391 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2022-12-14 06:46:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:30,062 INFO L93 Difference]: Finished difference Result 888 states and 1415 transitions. [2022-12-14 06:46:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:46:30,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 98 [2022-12-14 06:46:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:30,067 INFO L225 Difference]: With dead ends: 888 [2022-12-14 06:46:30,067 INFO L226 Difference]: Without dead ends: 873 [2022-12-14 06:46:30,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:46:30,068 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 41 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:30,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2724 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:46:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-12-14 06:46:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 869. [2022-12-14 06:46:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 608 states have (on average 1.5953947368421053) internal successors, (970), 646 states have internal predecessors, (970), 206 states have call successors, (206), 51 states have call predecessors, (206), 54 states have return successors, (213), 196 states have call predecessors, (213), 201 states have call successors, (213) [2022-12-14 06:46:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1389 transitions. [2022-12-14 06:46:30,103 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1389 transitions. Word has length 98 [2022-12-14 06:46:30,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:30,104 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1389 transitions. [2022-12-14 06:46:30,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2022-12-14 06:46:30,104 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1389 transitions. [2022-12-14 06:46:30,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 06:46:30,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:30,106 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:46:30,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:46:30,106 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:30,106 INFO L85 PathProgramCache]: Analyzing trace with hash 95527908, now seen corresponding path program 1 times [2022-12-14 06:46:30,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:30,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003093668] [2022-12-14 06:46:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:46:33,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:33,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003093668] [2022-12-14 06:46:33,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003093668] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:46:33,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563266616] [2022-12-14 06:46:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:33,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:46:33,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:46:33,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:46:33,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:46:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:46:33,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:46:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:46:33,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:46:33,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563266616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:33,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:46:33,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [29] total 31 [2022-12-14 06:46:33,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769735483] [2022-12-14 06:46:33,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:33,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:46:33,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:33,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:46:33,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-12-14 06:46:33,626 INFO L87 Difference]: Start difference. First operand 869 states and 1389 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-12-14 06:46:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:33,800 INFO L93 Difference]: Finished difference Result 952 states and 1513 transitions. [2022-12-14 06:46:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:46:33,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 105 [2022-12-14 06:46:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:33,806 INFO L225 Difference]: With dead ends: 952 [2022-12-14 06:46:33,806 INFO L226 Difference]: Without dead ends: 937 [2022-12-14 06:46:33,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:46:33,808 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 44 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:33,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1717 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:46:33,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-12-14 06:46:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 873. [2022-12-14 06:46:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 612 states have (on average 1.591503267973856) internal successors, (974), 650 states have internal predecessors, (974), 206 states have call successors, (206), 51 states have call predecessors, (206), 54 states have return successors, (213), 196 states have call predecessors, (213), 201 states have call successors, (213) [2022-12-14 06:46:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1393 transitions. [2022-12-14 06:46:33,848 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1393 transitions. Word has length 105 [2022-12-14 06:46:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:33,849 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1393 transitions. [2022-12-14 06:46:33,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-12-14 06:46:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1393 transitions. [2022-12-14 06:46:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 06:46:33,851 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:33,851 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:46:33,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:46:34,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:46:34,052 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:34,053 INFO L85 PathProgramCache]: Analyzing trace with hash 455489807, now seen corresponding path program 1 times [2022-12-14 06:46:34,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:34,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316283538] [2022-12-14 06:46:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 06:46:34,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316283538] [2022-12-14 06:46:34,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316283538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:46:34,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074016104] [2022-12-14 06:46:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:34,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:46:34,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:46:34,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:46:34,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:46:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:35,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 06:46:35,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:46:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:46:35,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:47:04,833 WARN L233 SmtUtils]: Spent 27.74s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 06:47:31,061 WARN L233 SmtUtils]: Spent 25.81s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 06:47:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 06:47:31,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074016104] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:47:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [668239230] [2022-12-14 06:47:31,576 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2022-12-14 06:47:31,577 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:47:31,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:47:31,582 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:47:31,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:47:36,910 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 433 for LOIs [2022-12-14 06:47:36,982 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 580 for LOIs [2022-12-14 06:47:39,418 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 580 for LOIs [2022-12-14 06:47:49,262 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 443 for LOIs [2022-12-14 06:47:51,572 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 493 for LOIs [2022-12-14 06:47:54,089 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 76 for LOIs [2022-12-14 06:47:54,102 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 85 for LOIs [2022-12-14 06:47:54,110 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 589 for LOIs [2022-12-14 06:47:57,801 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 28 for LOIs [2022-12-14 06:47:57,803 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 451 for LOIs [2022-12-14 06:47:58,689 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 445 for LOIs [2022-12-14 06:47:58,763 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 552 for LOIs [2022-12-14 06:48:01,277 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 825 for LOIs [2022-12-14 06:50:05,505 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 652 for LOIs [2022-12-14 06:50:05,978 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:50:19,375 WARN L233 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 652 DAG size of output: 517 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:50:25,972 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 692 DAG size of output: 531 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:50:42,021 WARN L233 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 825 DAG size of output: 678 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:51:05,299 WARN L233 SmtUtils]: Spent 19.57s on a formula simplification. DAG size of input: 1077 DAG size of output: 694 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:53:05,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16438#(and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 34) 2) 105) (= 32 (select (select |#memory_int| 34) 0)) (= ~floorButtons_3~0 0) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (<= ~currentHeading~0 1) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (= (select |#valid| 33) 1) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (<= ~currentFloorID~0 2147483647) (= ~calls_3~0 0) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= ~calls_0~0 0) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= ~head~0.offset 0) (= (select (select |#memory_int| 32) 3) 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= ~floorButtons_4~0 0) (= (select |#valid| 18) 1) (= ~calls_1~0 0) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (not (= ~landingButtons_spc1_0~0 0)) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= ~floorButtons_2~0 0) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= 97 (select (select |#memory_int| 19) 1)) (= ~floorButtons_1~0 0) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= ~floorButtons_0~0 0) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= 4 (select |#length| 18)) (= ~head~0.base 0) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= 112 (select (select |#memory_int| 30) 3)) (<= 0 ~currentHeading~0) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 36) 0) 10) (= ~calls_2~0 0) (= ~calls_4~0 0) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select (select |#memory_int| 35) 2) 105) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 32) 0)))' at error location [2022-12-14 06:53:05,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:53:05,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:53:05,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 32 [2022-12-14 06:53:05,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730891793] [2022-12-14 06:53:05,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:53:05,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 06:53:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:53:05,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 06:53:05,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1146, Invalid=12426, Unknown=0, NotChecked=0, Total=13572 [2022-12-14 06:53:05,944 INFO L87 Difference]: Start difference. First operand 873 states and 1393 transitions. Second operand has 32 states, 23 states have (on average 7.260869565217392) internal successors, (167), 27 states have internal predecessors, (167), 14 states have call successors, (56), 7 states have call predecessors, (56), 19 states have return successors, (58), 19 states have call predecessors, (58), 13 states have call successors, (58) [2022-12-14 06:53:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:53:18,269 INFO L93 Difference]: Finished difference Result 5102 states and 8235 transitions. [2022-12-14 06:53:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-14 06:53:18,270 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 7.260869565217392) internal successors, (167), 27 states have internal predecessors, (167), 14 states have call successors, (56), 7 states have call predecessors, (56), 19 states have return successors, (58), 19 states have call predecessors, (58), 13 states have call successors, (58) Word has length 128 [2022-12-14 06:53:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:53:18,287 INFO L225 Difference]: With dead ends: 5102 [2022-12-14 06:53:18,287 INFO L226 Difference]: Without dead ends: 4258 [2022-12-14 06:53:18,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 301 SyntacticMatches, 4 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13031 ImplicationChecksByTransitivity, 183.6s TimeCoverageRelationStatistics Valid=2506, Invalid=31166, Unknown=0, NotChecked=0, Total=33672 [2022-12-14 06:53:18,296 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 7469 mSDsluCounter, 7319 mSDsCounter, 0 mSdLazyCounter, 19964 mSolverCounterSat, 4657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7517 SdHoareTripleChecker+Valid, 7978 SdHoareTripleChecker+Invalid, 24621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4657 IncrementalHoareTripleChecker+Valid, 19964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:53:18,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7517 Valid, 7978 Invalid, 24621 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4657 Valid, 19964 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-12-14 06:53:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2022-12-14 06:53:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 3545. [2022-12-14 06:53:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 2547 states have (on average 1.595995288574794) internal successors, (4065), 2684 states have internal predecessors, (4065), 768 states have call successors, (768), 201 states have call predecessors, (768), 229 states have return successors, (844), 739 states have call predecessors, (844), 763 states have call successors, (844) [2022-12-14 06:53:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 5677 transitions. [2022-12-14 06:53:18,518 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 5677 transitions. Word has length 128 [2022-12-14 06:53:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:53:18,518 INFO L495 AbstractCegarLoop]: Abstraction has 3545 states and 5677 transitions. [2022-12-14 06:53:18,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 7.260869565217392) internal successors, (167), 27 states have internal predecessors, (167), 14 states have call successors, (56), 7 states have call predecessors, (56), 19 states have return successors, (58), 19 states have call predecessors, (58), 13 states have call successors, (58) [2022-12-14 06:53:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 5677 transitions. [2022-12-14 06:53:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 06:53:18,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:53:18,524 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 06:53:18,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:53:18,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:53:18,725 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:53:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:53:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1143769932, now seen corresponding path program 1 times [2022-12-14 06:53:18,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:53:18,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364681638] [2022-12-14 06:53:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:53:18,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:53:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:53:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 06:53:18,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:53:18,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364681638] [2022-12-14 06:53:18,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364681638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:53:18,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935296383] [2022-12-14 06:53:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:53:18,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:53:18,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:53:18,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:53:18,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:53:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:53:19,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 2230 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:53:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:53:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-12-14 06:53:19,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:53:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-12-14 06:53:19,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935296383] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:53:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84290765] [2022-12-14 06:53:19,601 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-12-14 06:53:19,601 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:53:19,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:53:19,601 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:53:19,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:53:26,438 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 410 for LOIs [2022-12-14 06:53:26,494 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 580 for LOIs [2022-12-14 06:53:35,989 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 681 for LOIs [2022-12-14 06:53:40,016 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 37 for LOIs [2022-12-14 06:53:40,149 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 24 for LOIs [2022-12-14 06:53:40,168 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 49 for LOIs [2022-12-14 06:53:40,179 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 18 for LOIs [2022-12-14 06:53:40,181 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 589 for LOIs [2022-12-14 06:53:43,644 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 24 for LOIs [2022-12-14 06:53:43,646 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 31 for LOIs [2022-12-14 06:53:43,688 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 29 for LOIs [2022-12-14 06:53:43,690 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 552 for LOIs [2022-12-14 06:53:46,220 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 825 for LOIs [2022-12-14 06:54:55,547 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 652 for LOIs [2022-12-14 06:54:56,015 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:55:08,057 WARN L233 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 652 DAG size of output: 517 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:55:14,654 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 692 DAG size of output: 531 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:55:30,461 WARN L233 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 825 DAG size of output: 678 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:55:51,881 WARN L233 SmtUtils]: Spent 19.64s on a formula simplification. DAG size of input: 1008 DAG size of output: 666 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:56:31,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29719#(and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 34) 2) 105) (= 32 (select (select |#memory_int| 34) 0)) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (= (select |#valid| 33) 1) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (<= ~currentFloorID~0 2147483647) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= ~head~0.offset 0) (= (select (select |#memory_int| 32) 3) 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select |#valid| 18) 1) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (not (= ~landingButtons_spc1_0~0 0)) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= 97 (select (select |#memory_int| 19) 1)) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= 4 (select |#length| 18)) (= ~head~0.base 0) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= 112 (select (select |#memory_int| 30) 3)) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 36) 0) 10) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select (select |#memory_int| 35) 2) 105) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 32) 0)))' at error location [2022-12-14 06:56:31,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:56:31,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:56:31,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 7] total 18 [2022-12-14 06:56:31,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36812332] [2022-12-14 06:56:31,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:56:31,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 06:56:31,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:31,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 06:56:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=8023, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 06:56:31,643 INFO L87 Difference]: Start difference. First operand 3545 states and 5677 transitions. Second operand has 18 states, 17 states have (on average 9.823529411764707) internal successors, (167), 17 states have internal predecessors, (167), 9 states have call successors, (52), 4 states have call predecessors, (52), 8 states have return successors, (53), 10 states have call predecessors, (53), 8 states have call successors, (53) [2022-12-14 06:56:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:36,516 INFO L93 Difference]: Finished difference Result 10058 states and 16336 transitions. [2022-12-14 06:56:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 06:56:36,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 9.823529411764707) internal successors, (167), 17 states have internal predecessors, (167), 9 states have call successors, (52), 4 states have call predecessors, (52), 8 states have return successors, (53), 10 states have call predecessors, (53), 8 states have call successors, (53) Word has length 161 [2022-12-14 06:56:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:36,541 INFO L225 Difference]: With dead ends: 10058 [2022-12-14 06:56:36,542 INFO L226 Difference]: Without dead ends: 6592 [2022-12-14 06:56:36,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 405 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5907 ImplicationChecksByTransitivity, 97.1s TimeCoverageRelationStatistics Valid=1126, Invalid=14876, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 06:56:36,558 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 3876 mSDsluCounter, 2095 mSDsCounter, 0 mSdLazyCounter, 7554 mSolverCounterSat, 2052 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3876 SdHoareTripleChecker+Valid, 2512 SdHoareTripleChecker+Invalid, 9606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2052 IncrementalHoareTripleChecker+Valid, 7554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:36,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3876 Valid, 2512 Invalid, 9606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2052 Valid, 7554 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 06:56:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6592 states. [2022-12-14 06:56:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6592 to 5966. [2022-12-14 06:56:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5966 states, 4251 states have (on average 1.4852975770406962) internal successors, (6314), 4460 states have internal predecessors, (6314), 1328 states have call successors, (1328), 341 states have call predecessors, (1328), 386 states have return successors, (1506), 1295 states have call predecessors, (1506), 1323 states have call successors, (1506) [2022-12-14 06:56:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5966 states to 5966 states and 9148 transitions. [2022-12-14 06:56:36,970 INFO L78 Accepts]: Start accepts. Automaton has 5966 states and 9148 transitions. Word has length 161 [2022-12-14 06:56:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:36,970 INFO L495 AbstractCegarLoop]: Abstraction has 5966 states and 9148 transitions. [2022-12-14 06:56:36,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 9.823529411764707) internal successors, (167), 17 states have internal predecessors, (167), 9 states have call successors, (52), 4 states have call predecessors, (52), 8 states have return successors, (53), 10 states have call predecessors, (53), 8 states have call successors, (53) [2022-12-14 06:56:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 5966 states and 9148 transitions. [2022-12-14 06:56:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 06:56:36,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:36,975 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2022-12-14 06:56:36,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:56:37,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:37,176 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1003014885, now seen corresponding path program 1 times [2022-12-14 06:56:37,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:37,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850952533] [2022-12-14 06:56:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:37,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-12-14 06:56:37,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:37,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850952533] [2022-12-14 06:56:37,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850952533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:37,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:56:37,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:56:37,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858817760] [2022-12-14 06:56:37,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:37,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:56:37,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:56:37,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:56:37,319 INFO L87 Difference]: Start difference. First operand 5966 states and 9148 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 06:56:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:37,772 INFO L93 Difference]: Finished difference Result 10638 states and 16682 transitions. [2022-12-14 06:56:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:56:37,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 161 [2022-12-14 06:56:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:37,798 INFO L225 Difference]: With dead ends: 10638 [2022-12-14 06:56:37,798 INFO L226 Difference]: Without dead ends: 6720 [2022-12-14 06:56:37,810 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 06:56:37,811 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 116 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:37,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1699 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:56:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2022-12-14 06:56:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 5996. [2022-12-14 06:56:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5996 states, 4281 states have (on average 1.4818967530950713) internal successors, (6344), 4490 states have internal predecessors, (6344), 1328 states have call successors, (1328), 341 states have call predecessors, (1328), 386 states have return successors, (1506), 1295 states have call predecessors, (1506), 1323 states have call successors, (1506) [2022-12-14 06:56:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5996 states to 5996 states and 9178 transitions. [2022-12-14 06:56:38,213 INFO L78 Accepts]: Start accepts. Automaton has 5996 states and 9178 transitions. Word has length 161 [2022-12-14 06:56:38,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:38,214 INFO L495 AbstractCegarLoop]: Abstraction has 5996 states and 9178 transitions. [2022-12-14 06:56:38,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 06:56:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5996 states and 9178 transitions. [2022-12-14 06:56:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 06:56:38,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:38,222 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:56:38,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:56:38,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash -987104334, now seen corresponding path program 1 times [2022-12-14 06:56:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:38,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452873650] [2022-12-14 06:56:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:38,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-12-14 06:56:38,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:38,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452873650] [2022-12-14 06:56:38,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452873650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:56:38,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380361305] [2022-12-14 06:56:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:38,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:38,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:38,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:56:38,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:56:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:38,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 2023 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:56:38,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 06:56:38,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:56:38,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380361305] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:38,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:56:38,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 06:56:38,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801620200] [2022-12-14 06:56:38,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:38,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:56:38,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:38,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:56:38,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:56:38,632 INFO L87 Difference]: Start difference. First operand 5996 states and 9178 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:56:39,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:39,163 INFO L93 Difference]: Finished difference Result 10004 states and 15599 transitions. [2022-12-14 06:56:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:56:39,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 164 [2022-12-14 06:56:39,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:39,188 INFO L225 Difference]: With dead ends: 10004 [2022-12-14 06:56:39,188 INFO L226 Difference]: Without dead ends: 6308 [2022-12-14 06:56:39,200 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 06:56:39,200 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 213 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:39,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1434 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:56:39,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6308 states. [2022-12-14 06:56:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6308 to 6308. [2022-12-14 06:56:39,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6308 states, 4585 states have (on average 1.5110141766630316) internal successors, (6928), 4794 states have internal predecessors, (6928), 1328 states have call successors, (1328), 349 states have call predecessors, (1328), 394 states have return successors, (1506), 1295 states have call predecessors, (1506), 1323 states have call successors, (1506) [2022-12-14 06:56:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6308 states to 6308 states and 9762 transitions. [2022-12-14 06:56:39,551 INFO L78 Accepts]: Start accepts. Automaton has 6308 states and 9762 transitions. Word has length 164 [2022-12-14 06:56:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:39,551 INFO L495 AbstractCegarLoop]: Abstraction has 6308 states and 9762 transitions. [2022-12-14 06:56:39,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:56:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 6308 states and 9762 transitions. [2022-12-14 06:56:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 06:56:39,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:39,556 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:56:39,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:56:39,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:56:39,756 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:39,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1028283517, now seen corresponding path program 1 times [2022-12-14 06:56:39,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:39,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058848906] [2022-12-14 06:56:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:39,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-12-14 06:56:39,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:39,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058848906] [2022-12-14 06:56:39,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058848906] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:56:39,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663424465] [2022-12-14 06:56:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:39,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:39,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:39,899 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:56:39,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:56:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:40,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 2028 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:56:40,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 06:56:40,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:56:40,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663424465] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:40,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:56:40,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 06:56:40,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067720871] [2022-12-14 06:56:40,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:40,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:56:40,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:40,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:56:40,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:56:40,158 INFO L87 Difference]: Start difference. First operand 6308 states and 9762 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:56:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:40,663 INFO L93 Difference]: Finished difference Result 10628 states and 16759 transitions. [2022-12-14 06:56:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:56:40,664 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 169 [2022-12-14 06:56:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:40,685 INFO L225 Difference]: With dead ends: 10628 [2022-12-14 06:56:40,685 INFO L226 Difference]: Without dead ends: 6620 [2022-12-14 06:56:40,695 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 06:56:40,696 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 211 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:40,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1434 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:56:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2022-12-14 06:56:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 6620. [2022-12-14 06:56:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 4889 states have (on average 1.5365105338515033) internal successors, (7512), 5098 states have internal predecessors, (7512), 1328 states have call successors, (1328), 357 states have call predecessors, (1328), 402 states have return successors, (1506), 1295 states have call predecessors, (1506), 1323 states have call successors, (1506) [2022-12-14 06:56:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 10346 transitions. [2022-12-14 06:56:41,060 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 10346 transitions. Word has length 169 [2022-12-14 06:56:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:41,060 INFO L495 AbstractCegarLoop]: Abstraction has 6620 states and 10346 transitions. [2022-12-14 06:56:41,060 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:56:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 10346 transitions. [2022-12-14 06:56:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 06:56:41,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:41,065 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:56:41,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:56:41,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:41,266 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:41,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1706387309, now seen corresponding path program 1 times [2022-12-14 06:56:41,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:41,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321052286] [2022-12-14 06:56:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:41,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 06:56:41,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321052286] [2022-12-14 06:56:41,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321052286] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:56:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711483965] [2022-12-14 06:56:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:41,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:41,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:41,374 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:56:41,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:56:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:41,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:56:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 06:56:41,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:56:41,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711483965] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:41,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:56:41,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 06:56:41,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735329037] [2022-12-14 06:56:41,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:41,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:56:41,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:41,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:56:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:56:41,638 INFO L87 Difference]: Start difference. First operand 6620 states and 10346 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:56:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:42,114 INFO L93 Difference]: Finished difference Result 11252 states and 17919 transitions. [2022-12-14 06:56:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:56:42,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 173 [2022-12-14 06:56:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:42,136 INFO L225 Difference]: With dead ends: 11252 [2022-12-14 06:56:42,136 INFO L226 Difference]: Without dead ends: 6932 [2022-12-14 06:56:42,146 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 06:56:42,146 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 209 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:42,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1434 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:56:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2022-12-14 06:56:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6932. [2022-12-14 06:56:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6932 states, 5193 states have (on average 1.5590217600616214) internal successors, (8096), 5402 states have internal predecessors, (8096), 1328 states have call successors, (1328), 365 states have call predecessors, (1328), 410 states have return successors, (1506), 1295 states have call predecessors, (1506), 1323 states have call successors, (1506) [2022-12-14 06:56:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6932 states to 6932 states and 10930 transitions. [2022-12-14 06:56:42,502 INFO L78 Accepts]: Start accepts. Automaton has 6932 states and 10930 transitions. Word has length 173 [2022-12-14 06:56:42,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:42,503 INFO L495 AbstractCegarLoop]: Abstraction has 6932 states and 10930 transitions. [2022-12-14 06:56:42,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:56:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 6932 states and 10930 transitions. [2022-12-14 06:56:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 06:56:42,506 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:42,506 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:56:42,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:56:42,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:42,707 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:42,707 INFO L85 PathProgramCache]: Analyzing trace with hash -744717678, now seen corresponding path program 1 times [2022-12-14 06:56:42,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:42,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238364123] [2022-12-14 06:56:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:42,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-12-14 06:56:42,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:42,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238364123] [2022-12-14 06:56:42,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238364123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:56:42,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697783447] [2022-12-14 06:56:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:42,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:42,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:42,819 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:56:42,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:56:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:43,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 2035 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:56:43,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 06:56:43,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:56:43,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697783447] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:43,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:56:43,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 06:56:43,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974085714] [2022-12-14 06:56:43,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:43,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:56:43,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:43,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:56:43,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:56:43,092 INFO L87 Difference]: Start difference. First operand 6932 states and 10930 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:56:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:43,669 INFO L93 Difference]: Finished difference Result 11876 states and 19079 transitions. [2022-12-14 06:56:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:56:43,670 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 176 [2022-12-14 06:56:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:43,700 INFO L225 Difference]: With dead ends: 11876 [2022-12-14 06:56:43,700 INFO L226 Difference]: Without dead ends: 7244 [2022-12-14 06:56:43,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 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 06:56:43,714 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 207 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:43,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1434 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:56:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7244 states. [2022-12-14 06:56:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7244 to 7244. [2022-12-14 06:56:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7244 states, 5497 states have (on average 1.5790431144260506) internal successors, (8680), 5706 states have internal predecessors, (8680), 1328 states have call successors, (1328), 373 states have call predecessors, (1328), 418 states have return successors, (1506), 1295 states have call predecessors, (1506), 1323 states have call successors, (1506) [2022-12-14 06:56:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7244 states to 7244 states and 11514 transitions. [2022-12-14 06:56:44,121 INFO L78 Accepts]: Start accepts. Automaton has 7244 states and 11514 transitions. Word has length 176 [2022-12-14 06:56:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:44,121 INFO L495 AbstractCegarLoop]: Abstraction has 7244 states and 11514 transitions. [2022-12-14 06:56:44,122 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:56:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 7244 states and 11514 transitions. [2022-12-14 06:56:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 06:56:44,125 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:44,125 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] [2022-12-14 06:56:44,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:56:44,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:56:44,327 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash -256624478, now seen corresponding path program 1 times [2022-12-14 06:56:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:44,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678803533] [2022-12-14 06:56:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:44,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-12-14 06:56:44,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:44,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678803533] [2022-12-14 06:56:44,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678803533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:44,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:56:44,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:56:44,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40145925] [2022-12-14 06:56:44,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:44,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:56:44,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:44,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:56:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:56:44,490 INFO L87 Difference]: Start difference. First operand 7244 states and 11514 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:56:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:44,941 INFO L93 Difference]: Finished difference Result 12524 states and 20231 transitions. [2022-12-14 06:56:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:56:44,942 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 178 [2022-12-14 06:56:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:44,966 INFO L225 Difference]: With dead ends: 12524 [2022-12-14 06:56:44,967 INFO L226 Difference]: Without dead ends: 7516 [2022-12-14 06:56:44,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:56:44,979 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 99 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:44,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1447 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:56:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2022-12-14 06:56:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 7516. [2022-12-14 06:56:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7516 states, 5761 states have (on average 1.5316785280333276) internal successors, (8824), 5970 states have internal predecessors, (8824), 1328 states have call successors, (1328), 381 states have call predecessors, (1328), 426 states have return successors, (1506), 1295 states have call predecessors, (1506), 1323 states have call successors, (1506) [2022-12-14 06:56:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7516 states to 7516 states and 11658 transitions. [2022-12-14 06:56:45,341 INFO L78 Accepts]: Start accepts. Automaton has 7516 states and 11658 transitions. Word has length 178 [2022-12-14 06:56:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:45,341 INFO L495 AbstractCegarLoop]: Abstraction has 7516 states and 11658 transitions. [2022-12-14 06:56:45,341 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:56:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 7516 states and 11658 transitions. [2022-12-14 06:56:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 06:56:45,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:45,345 INFO L195 NwaCegarLoop]: trace histogram [7, 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] [2022-12-14 06:56:45,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:56:45,345 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:45,346 INFO L85 PathProgramCache]: Analyzing trace with hash -781894061, now seen corresponding path program 1 times [2022-12-14 06:56:45,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:45,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055461570] [2022-12-14 06:56:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:45,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-12-14 06:56:45,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:45,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055461570] [2022-12-14 06:56:45,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055461570] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:45,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:56:45,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 06:56:45,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242037202] [2022-12-14 06:56:45,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:45,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:56:45,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:45,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:56:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:56:45,555 INFO L87 Difference]: Start difference. First operand 7516 states and 11658 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2022-12-14 06:56:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:47,608 INFO L93 Difference]: Finished difference Result 15181 states and 23760 transitions. [2022-12-14 06:56:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 06:56:47,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) Word has length 178 [2022-12-14 06:56:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:47,641 INFO L225 Difference]: With dead ends: 15181 [2022-12-14 06:56:47,641 INFO L226 Difference]: Without dead ends: 9589 [2022-12-14 06:56:47,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:56:47,655 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1651 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 3542 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 4276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 3542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:47,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1685 Valid, 1628 Invalid, 4276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 3542 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 06:56:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9589 states. [2022-12-14 06:56:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9589 to 9160. [2022-12-14 06:56:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9160 states, 6971 states have (on average 1.5125520011476115) internal successors, (10544), 7252 states have internal predecessors, (10544), 1614 states have call successors, (1614), 499 states have call predecessors, (1614), 574 states have return successors, (1852), 1575 states have call predecessors, (1852), 1609 states have call successors, (1852) [2022-12-14 06:56:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9160 states to 9160 states and 14010 transitions. [2022-12-14 06:56:48,110 INFO L78 Accepts]: Start accepts. Automaton has 9160 states and 14010 transitions. Word has length 178 [2022-12-14 06:56:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:48,110 INFO L495 AbstractCegarLoop]: Abstraction has 9160 states and 14010 transitions. [2022-12-14 06:56:48,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2022-12-14 06:56:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 9160 states and 14010 transitions. [2022-12-14 06:56:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 06:56:48,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:48,114 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] [2022-12-14 06:56:48,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:56:48,115 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:48,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:48,115 INFO L85 PathProgramCache]: Analyzing trace with hash 784314659, now seen corresponding path program 1 times [2022-12-14 06:56:48,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:48,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984602921] [2022-12-14 06:56:48,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:48,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-12-14 06:56:49,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:49,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984602921] [2022-12-14 06:56:49,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984602921] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:56:49,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807878183] [2022-12-14 06:56:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:49,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:49,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:49,190 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:56:49,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3dc0882-8822-4407-93e4-7a25c38d380d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:56:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:49,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2038 conjuncts, 123 conjunts are in the unsatisfiable core [2022-12-14 06:56:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 35 proven. 8 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-14 06:56:51,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:57:18,120 WARN L233 SmtUtils]: Spent 26.80s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 06:57:45,058 WARN L233 SmtUtils]: Spent 25.24s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 06:58:13,473 WARN L233 SmtUtils]: Spent 27.78s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)