./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta --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 e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 --- 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-dbf71c6-m [2022-10-17 17:42:58,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:42:58,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:42:58,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:42:58,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:42:58,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:42:58,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:42:58,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:42:58,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:42:58,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:42:58,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:42:58,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:42:58,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:42:58,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:42:58,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:42:58,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:42:58,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:42:58,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:42:58,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:42:58,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:42:58,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:42:58,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:42:58,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:42:58,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:42:58,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:42:58,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:42:58,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:42:58,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:42:58,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:42:58,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:42:58,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:42:58,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:42:58,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:42:58,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:42:58,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:42:58,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:42:58,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:42:58,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:42:58,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:42:58,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:42:58,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:42:58,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:42:58,508 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:42:58,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:42:58,509 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:42:58,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:42:58,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:42:58,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:42:58,511 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:42:58,511 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:42:58,511 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:42:58,512 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:42:58,513 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:42:58,513 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:42:58,513 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:42:58,514 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:42:58,514 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:42:58,514 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:42:58,514 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:42:58,515 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:42:58,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:42:58,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:42:58,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:42:58,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:42:58,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:42:58,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:42:58,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:42:58,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:42:58,517 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:42:58,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:42:58,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:42:58,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:42:58,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:42:58,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:42:58,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:58,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:42:58,520 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:42:58,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:42:58,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:42:58,520 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:42:58,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:42:58,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:42:58,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:42:58,521 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_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 [2022-10-17 17:42:58,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:42:58,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:42:58,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:42:58,840 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:42:58,840 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:42:58,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2022-10-17 17:42:58,918 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/data/fd8f37ff2/af483e231edd4a3cbf69aac3f5b00aa4/FLAG85172ab97 [2022-10-17 17:42:59,545 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:42:59,546 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2022-10-17 17:42:59,577 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/data/fd8f37ff2/af483e231edd4a3cbf69aac3f5b00aa4/FLAG85172ab97 [2022-10-17 17:42:59,769 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/data/fd8f37ff2/af483e231edd4a3cbf69aac3f5b00aa4 [2022-10-17 17:42:59,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:42:59,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:42:59,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:59,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:42:59,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:42:59,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:59" (1/1) ... [2022-10-17 17:42:59,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5542bd81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:59, skipping insertion in model container [2022-10-17 17:42:59,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:59" (1/1) ... [2022-10-17 17:42:59,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:42:59,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:43:00,366 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2022-10-17 17:43:00,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:43:00,537 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:43:00,635 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2022-10-17 17:43:00,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:43:00,721 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:43:00,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00 WrapperNode [2022-10-17 17:43:00,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:43:00,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:43:00,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:43:00,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:43:00,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:00,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:00,897 INFO L138 Inliner]: procedures = 96, calls = 346, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1134 [2022-10-17 17:43:00,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:43:00,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:43:00,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:43:00,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:43:00,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:00,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:00,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:00,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:00,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:00,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:00,991 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:00,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:01,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:43:01,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:43:01,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:43:01,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:43:01,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (1/1) ... [2022-10-17 17:43:01,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:43:01,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:01,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:43:01,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a3a644-3efb-472b-816c-e9a021df1027/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:43:01,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:43:01,127 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-10-17 17:43:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-10-17 17:43:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-10-17 17:43:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-10-17 17:43:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-10-17 17:43:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-10-17 17:43:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-10-17 17:43:01,129 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-10-17 17:43:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-10-17 17:43:01,129 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-10-17 17:43:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-10-17 17:43:01,129 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-10-17 17:43:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-10-17 17:43:01,130 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-10-17 17:43:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:43:01,130 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:43:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:43:01,131 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:43:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-10-17 17:43:01,131 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-10-17 17:43:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-10-17 17:43:01,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-10-17 17:43:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-10-17 17:43:01,132 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-10-17 17:43:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-10-17 17:43:01,133 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-10-17 17:43:01,133 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-10-17 17:43:01,133 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-10-17 17:43:01,133 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-10-17 17:43:01,135 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-10-17 17:43:01,135 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-10-17 17:43:01,135 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-10-17 17:43:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-10-17 17:43:01,136 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-10-17 17:43:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-10-17 17:43:01,136 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-10-17 17:43:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-10-17 17:43:01,137 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-10-17 17:43:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-10-17 17:43:01,137 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-10-17 17:43:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:43:01,138 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-10-17 17:43:01,138 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-10-17 17:43:01,138 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-10-17 17:43:01,139 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-10-17 17:43:01,140 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-10-17 17:43:01,140 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-10-17 17:43:01,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:43:01,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:43:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-10-17 17:43:01,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-10-17 17:43:01,143 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-10-17 17:43:01,144 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-10-17 17:43:01,292 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:43:01,295 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:43:02,638 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:43:03,544 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:43:03,545 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:43:03,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:03 BoogieIcfgContainer [2022-10-17 17:43:03,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:43:03,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:43:03,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:43:03,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:43:03,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:42:59" (1/3) ... [2022-10-17 17:43:03,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f176b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:43:03, skipping insertion in model container [2022-10-17 17:43:03,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:00" (2/3) ... [2022-10-17 17:43:03,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f176b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:43:03, skipping insertion in model container [2022-10-17 17:43:03,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:03" (3/3) ... [2022-10-17 17:43:03,560 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product20.cil.c [2022-10-17 17:43:03,583 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:43:03,583 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:43:03,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:43:03,688 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;@2ac5d32a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:43:03,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:43:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2022-10-17 17:43:03,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 17:43:03,714 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:03,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:03,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1900930352, now seen corresponding path program 1 times [2022-10-17 17:43:03,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:03,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101841542] [2022-10-17 17:43:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:03,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:43:04,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:04,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101841542] [2022-10-17 17:43:04,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101841542] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:04,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:04,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:43:04,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624555536] [2022-10-17 17:43:04,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:04,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:43:04,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:04,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:43:04,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:43:04,294 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-10-17 17:43:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:04,517 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2022-10-17 17:43:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:43:04,520 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-10-17 17:43:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:04,545 INFO L225 Difference]: With dead ends: 401 [2022-10-17 17:43:04,546 INFO L226 Difference]: Without dead ends: 379 [2022-10-17 17:43:04,549 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 [2022-10-17 17:43:04,553 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:04,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:43:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-10-17 17:43:04,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-10-17 17:43:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 255 states have (on average 1.580392156862745) internal successors, (403), 276 states have internal predecessors, (403), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2022-10-17 17:43:04,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2022-10-17 17:43:04,639 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2022-10-17 17:43:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:04,641 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2022-10-17 17:43:04,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-10-17 17:43:04,642 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2022-10-17 17:43:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 17:43:04,646 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:04,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:04,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:43:04,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:04,648 INFO L85 PathProgramCache]: Analyzing trace with hash 941732160, now seen corresponding path program 1 times [2022-10-17 17:43:04,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:04,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113540874] [2022-10-17 17:43:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:04,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:43:05,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:05,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113540874] [2022-10-17 17:43:05,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113540874] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:05,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:05,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:43:05,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124553994] [2022-10-17 17:43:05,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:05,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:43:05,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:05,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:43:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:43:05,240 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 17:43:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:07,554 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2022-10-17 17:43:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:43:07,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-10-17 17:43:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:07,565 INFO L225 Difference]: With dead ends: 1243 [2022-10-17 17:43:07,565 INFO L226 Difference]: Without dead ends: 880 [2022-10-17 17:43:07,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:43:07,572 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 1209 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:07,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 1345 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-10-17 17:43:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-10-17 17:43:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2022-10-17 17:43:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 556 states have (on average 1.6025179856115108) internal successors, (891), 586 states have internal predecessors, (891), 192 states have call successors, (192), 43 states have call predecessors, (192), 44 states have return successors, (194), 176 states have call predecessors, (194), 187 states have call successors, (194) [2022-10-17 17:43:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2022-10-17 17:43:07,719 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2022-10-17 17:43:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:07,721 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2022-10-17 17:43:07,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 17:43:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2022-10-17 17:43:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-10-17 17:43:07,736 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:07,737 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:07,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:43:07,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:07,747 INFO L85 PathProgramCache]: Analyzing trace with hash 707766777, now seen corresponding path program 1 times [2022-10-17 17:43:07,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:07,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595439873] [2022-10-17 17:43:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:07,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:43:08,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:08,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595439873] [2022-10-17 17:43:08,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595439873] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:08,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:08,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:43:08,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690234618] [2022-10-17 17:43:08,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:08,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:43:08,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:43:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:43:08,309 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-10-17 17:43:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:10,718 INFO L93 Difference]: Finished difference Result 2479 states and 4037 transitions. [2022-10-17 17:43:10,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:43:10,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2022-10-17 17:43:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:10,735 INFO L225 Difference]: With dead ends: 2479 [2022-10-17 17:43:10,736 INFO L226 Difference]: Without dead ends: 1703 [2022-10-17 17:43:10,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:43:10,743 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 1141 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:10,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 1896 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-10-17 17:43:10,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-10-17 17:43:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1616. [2022-10-17 17:43:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1143 states have (on average 1.6071741032370954) internal successors, (1837), 1199 states have internal predecessors, (1837), 382 states have call successors, (382), 83 states have call predecessors, (382), 90 states have return successors, (409), 357 states have call predecessors, (409), 377 states have call successors, (409) [2022-10-17 17:43:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2628 transitions. [2022-10-17 17:43:10,909 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2628 transitions. Word has length 88 [2022-10-17 17:43:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:10,910 INFO L495 AbstractCegarLoop]: Abstraction has 1616 states and 2628 transitions. [2022-10-17 17:43:10,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-10-17 17:43:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2628 transitions. [2022-10-17 17:43:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-10-17 17:43:10,915 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:10,915 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:10,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:43:10,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:10,917 INFO L85 PathProgramCache]: Analyzing trace with hash 951706947, now seen corresponding path program 1 times [2022-10-17 17:43:10,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:10,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427320370] [2022-10-17 17:43:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:10,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:43:11,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:11,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427320370] [2022-10-17 17:43:11,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427320370] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:11,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:11,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:43:11,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422491763] [2022-10-17 17:43:11,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:11,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:43:11,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:11,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:43:11,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:43:11,361 INFO L87 Difference]: Start difference. First operand 1616 states and 2628 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-10-17 17:43:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:12,152 INFO L93 Difference]: Finished difference Result 1715 states and 2790 transitions. [2022-10-17 17:43:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:43:12,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-10-17 17:43:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:12,169 INFO L225 Difference]: With dead ends: 1715 [2022-10-17 17:43:12,169 INFO L226 Difference]: Without dead ends: 1700 [2022-10-17 17:43:12,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:43:12,173 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 689 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:12,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 1848 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 17:43:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-10-17 17:43:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1622. [2022-10-17 17:43:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1149 states have (on average 1.6040034812880766) internal successors, (1843), 1205 states have internal predecessors, (1843), 382 states have call successors, (382), 83 states have call predecessors, (382), 90 states have return successors, (409), 357 states have call predecessors, (409), 377 states have call successors, (409) [2022-10-17 17:43:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2634 transitions. [2022-10-17 17:43:12,349 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2634 transitions. Word has length 92 [2022-10-17 17:43:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:12,350 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2634 transitions. [2022-10-17 17:43:12,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-10-17 17:43:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2634 transitions. [2022-10-17 17:43:12,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-10-17 17:43:12,355 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:12,355 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:12,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:43:12,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:12,357 INFO L85 PathProgramCache]: Analyzing trace with hash 827203565, now seen corresponding path program 1 times [2022-10-17 17:43:12,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:12,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251576100] [2022-10-17 17:43:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:12,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:43:12,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:12,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251576100] [2022-10-17 17:43:12,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251576100] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:12,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:12,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:43:12,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508779818] [2022-10-17 17:43:12,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:12,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:43:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:12,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:43:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:43:12,917 INFO L87 Difference]: Start difference. First operand 1622 states and 2634 transitions. Second operand has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2022-10-17 17:43:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:16,171 INFO L93 Difference]: Finished difference Result 4103 states and 6645 transitions. [2022-10-17 17:43:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-17 17:43:16,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2022-10-17 17:43:16,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:16,192 INFO L225 Difference]: With dead ends: 4103 [2022-10-17 17:43:16,192 INFO L226 Difference]: Without dead ends: 2497 [2022-10-17 17:43:16,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:43:16,209 INFO L413 NwaCegarLoop]: 981 mSDtfsCounter, 979 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 4557 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 3220 SdHoareTripleChecker+Invalid, 4966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 4557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:16,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 3220 Invalid, 4966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 4557 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-10-17 17:43:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2022-10-17 17:43:16,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2414. [2022-10-17 17:43:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 1693 states have (on average 1.5871234494979327) internal successors, (2687), 1771 states have internal predecessors, (2687), 576 states have call successors, (576), 125 states have call predecessors, (576), 144 states have return successors, (621), 550 states have call predecessors, (621), 571 states have call successors, (621) [2022-10-17 17:43:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3884 transitions. [2022-10-17 17:43:16,436 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3884 transitions. Word has length 96 [2022-10-17 17:43:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:16,438 INFO L495 AbstractCegarLoop]: Abstraction has 2414 states and 3884 transitions. [2022-10-17 17:43:16,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2022-10-17 17:43:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3884 transitions. [2022-10-17 17:43:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-10-17 17:43:16,448 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:16,448 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:16,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:43:16,449 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1965481963, now seen corresponding path program 1 times [2022-10-17 17:43:16,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:16,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775613377] [2022-10-17 17:43:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:16,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:43:16,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:16,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775613377] [2022-10-17 17:43:16,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775613377] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:16,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:16,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:43:16,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488956811] [2022-10-17 17:43:16,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:16,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:43:16,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:43:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:43:16,871 INFO L87 Difference]: Start difference. First operand 2414 states and 3884 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-10-17 17:43:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:17,619 INFO L93 Difference]: Finished difference Result 2559 states and 4089 transitions. [2022-10-17 17:43:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 17:43:17,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-10-17 17:43:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:17,643 INFO L225 Difference]: With dead ends: 2559 [2022-10-17 17:43:17,643 INFO L226 Difference]: Without dead ends: 2544 [2022-10-17 17:43:17,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:43:17,648 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 622 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:17,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 2758 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:43:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-10-17 17:43:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2490. [2022-10-17 17:43:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1745 states have (on average 1.5787965616045845) internal successors, (2755), 1823 states have internal predecessors, (2755), 592 states have call successors, (592), 133 states have call predecessors, (592), 152 states have return successors, (647), 566 states have call predecessors, (647), 587 states have call successors, (647) [2022-10-17 17:43:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3994 transitions. [2022-10-17 17:43:17,981 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3994 transitions. Word has length 97 [2022-10-17 17:43:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:17,981 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3994 transitions. [2022-10-17 17:43:17,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-10-17 17:43:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3994 transitions. [2022-10-17 17:43:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-10-17 17:43:17,986 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:17,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:17,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:43:17,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:17,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1900539976, now seen corresponding path program 1 times [2022-10-17 17:43:17,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:17,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468559005] [2022-10-17 17:43:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:17,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:43:18,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:18,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468559005] [2022-10-17 17:43:18,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468559005] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:18,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:18,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:43:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243109132] [2022-10-17 17:43:18,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:18,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:43:18,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:18,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:43:18,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:43:18,305 INFO L87 Difference]: Start difference. First operand 2490 states and 3994 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-10-17 17:43:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:19,900 INFO L93 Difference]: Finished difference Result 6763 states and 11044 transitions. [2022-10-17 17:43:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:43:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2022-10-17 17:43:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:19,938 INFO L225 Difference]: With dead ends: 6763 [2022-10-17 17:43:19,939 INFO L226 Difference]: Without dead ends: 4289 [2022-10-17 17:43:19,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:43:19,959 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 1150 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:19,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 968 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 17:43:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2022-10-17 17:43:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3926. [2022-10-17 17:43:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 2756 states have (on average 1.5711175616835995) internal successors, (4330), 2886 states have internal predecessors, (4330), 922 states have call successors, (922), 203 states have call predecessors, (922), 247 states have return successors, (1078), 881 states have call predecessors, (1078), 917 states have call successors, (1078) [2022-10-17 17:43:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 6330 transitions. [2022-10-17 17:43:20,440 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 6330 transitions. Word has length 104 [2022-10-17 17:43:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:20,442 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 6330 transitions. [2022-10-17 17:43:20,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-10-17 17:43:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 6330 transitions. [2022-10-17 17:43:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-10-17 17:43:20,447 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:20,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:20,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:43:20,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1212521930, now seen corresponding path program 1 times [2022-10-17 17:43:20,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:20,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39086204] [2022-10-17 17:43:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:20,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:43:20,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39086204] [2022-10-17 17:43:20,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39086204] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:20,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:20,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:43:20,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835061740] [2022-10-17 17:43:20,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:20,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:43:20,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:20,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:43:20,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:43:20,738 INFO L87 Difference]: Start difference. First operand 3926 states and 6330 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-10-17 17:43:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:22,601 INFO L93 Difference]: Finished difference Result 11025 states and 18284 transitions. [2022-10-17 17:43:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:43:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2022-10-17 17:43:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:22,666 INFO L225 Difference]: With dead ends: 11025 [2022-10-17 17:43:22,666 INFO L226 Difference]: Without dead ends: 7118 [2022-10-17 17:43:22,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:43:22,697 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 1137 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:22,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 977 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 17:43:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2022-10-17 17:43:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 6647. [2022-10-17 17:43:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6647 states, 4675 states have (on average 1.5670588235294118) internal successors, (7326), 4923 states have internal predecessors, (7326), 1532 states have call successors, (1532), 343 states have call predecessors, (1532), 439 states have return successors, (1994), 1455 states have call predecessors, (1994), 1527 states have call successors, (1994) [2022-10-17 17:43:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6647 states to 6647 states and 10852 transitions. [2022-10-17 17:43:23,475 INFO L78 Accepts]: Start accepts. Automaton has 6647 states and 10852 transitions. Word has length 105 [2022-10-17 17:43:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:23,476 INFO L495 AbstractCegarLoop]: Abstraction has 6647 states and 10852 transitions. [2022-10-17 17:43:23,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-10-17 17:43:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 6647 states and 10852 transitions. [2022-10-17 17:43:23,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-10-17 17:43:23,481 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:23,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:23,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:43:23,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1066802886, now seen corresponding path program 1 times [2022-10-17 17:43:23,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:23,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862226951] [2022-10-17 17:43:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:43:23,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:23,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862226951] [2022-10-17 17:43:23,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862226951] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:23,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:23,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:43:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049236681] [2022-10-17 17:43:23,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:23,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:43:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:43:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:43:23,832 INFO L87 Difference]: Start difference. First operand 6647 states and 10852 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-10-17 17:43:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:26,210 INFO L93 Difference]: Finished difference Result 19370 states and 33133 transitions. [2022-10-17 17:43:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:43:26,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2022-10-17 17:43:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:26,306 INFO L225 Difference]: With dead ends: 19370 [2022-10-17 17:43:26,306 INFO L226 Difference]: Without dead ends: 12748 [2022-10-17 17:43:26,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:43:26,356 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 1124 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:26,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1194 Valid, 986 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-17 17:43:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12748 states.