./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0 --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 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b --- 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-e04fb08 [2022-11-16 20:30:00,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:30:00,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:30:00,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:30:00,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:30:00,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:30:00,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:30:00,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:30:00,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:30:00,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:30:00,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:30:00,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:30:00,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:30:00,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:30:00,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:30:00,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:30:00,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:30:00,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:30:00,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:30:00,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:30:00,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:30:00,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:30:00,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:30:00,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:30:00,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:30:00,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:30:00,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:30:00,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:30:00,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:30:00,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:30:00,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:30:00,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:30:00,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:30:00,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:30:00,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:30:00,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:30:00,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:30:00,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:30:00,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:30:00,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:30:00,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:30:00,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:30:00,428 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:30:00,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:30:00,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:30:00,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:30:00,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:30:00,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:30:00,431 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:30:00,431 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:30:00,431 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:30:00,432 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:30:00,433 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:30:00,433 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:30:00,433 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:30:00,433 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:30:00,434 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:30:00,434 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:30:00,434 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:30:00,434 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:30:00,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:30:00,436 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:30:00,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:30:00,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:30:00,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:30:00,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:30:00,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:30:00,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:30:00,439 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:30:00,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:30:00,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:30:00,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:30:00,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:30:00,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:30:00,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:30:00,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:30:00,442 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:30:00,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:30:00,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:30:00,442 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:30:00,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:30:00,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:30:00,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:30:00,443 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_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b [2022-11-16 20:30:00,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:30:00,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:30:00,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:30:00,814 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:30:00,815 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:30:00,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2022-11-16 20:30:00,892 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/data/e7e99e347/149788754e0e4fb2ab3505e52e845b9b/FLAG5c6f7b6b7 [2022-11-16 20:30:01,523 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:30:01,524 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2022-11-16 20:30:01,556 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/data/e7e99e347/149788754e0e4fb2ab3505e52e845b9b/FLAG5c6f7b6b7 [2022-11-16 20:30:01,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/data/e7e99e347/149788754e0e4fb2ab3505e52e845b9b [2022-11-16 20:30:01,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:30:01,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:30:01,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:30:01,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:30:01,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:30:01,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:30:01" (1/1) ... [2022-11-16 20:30:01,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7befabbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:01, skipping insertion in model container [2022-11-16 20:30:01,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:30:01" (1/1) ... [2022-11-16 20:30:01,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:30:01,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:30:02,074 WARN L229 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_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2022-11-16 20:30:02,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:30:02,447 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:30:02,460 WARN L229 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_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2022-11-16 20:30:02,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:30:02,668 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:30:02,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02 WrapperNode [2022-11-16 20:30:02,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:30:02,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:30:02,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:30:02,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:30:02,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,790 INFO L138 Inliner]: procedures = 91, calls = 344, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1101 [2022-11-16 20:30:02,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:30:02,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:30:02,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:30:02,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:30:02,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,857 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:30:02,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:30:02,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:30:02,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:30:02,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (1/1) ... [2022-11-16 20:30:02,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:30:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:02,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:30:02,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:30:03,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:30:03,005 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-16 20:30:03,005 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-16 20:30:03,005 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-16 20:30:03,006 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-16 20:30:03,006 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-16 20:30:03,006 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-16 20:30:03,006 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-16 20:30:03,006 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-16 20:30:03,007 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-16 20:30:03,007 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-16 20:30:03,007 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-16 20:30:03,007 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-16 20:30:03,007 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-16 20:30:03,007 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-16 20:30:03,008 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-16 20:30:03,008 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-16 20:30:03,008 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-16 20:30:03,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-16 20:30:03,008 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-16 20:30:03,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-16 20:30:03,009 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-16 20:30:03,009 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-16 20:30:03,009 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-16 20:30:03,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-16 20:30:03,010 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-16 20:30:03,010 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-16 20:30:03,010 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-16 20:30:03,010 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-16 20:30:03,011 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-16 20:30:03,011 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-16 20:30:03,011 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-16 20:30:03,011 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-16 20:30:03,011 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-16 20:30:03,011 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-16 20:30:03,012 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-16 20:30:03,012 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-16 20:30:03,012 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-16 20:30:03,012 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-16 20:30:03,012 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-16 20:30:03,013 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-16 20:30:03,013 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-16 20:30:03,013 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-16 20:30:03,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:30:03,014 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-16 20:30:03,014 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-16 20:30:03,015 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-16 20:30:03,016 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-16 20:30:03,016 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-16 20:30:03,016 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-16 20:30:03,017 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-16 20:30:03,017 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-16 20:30:03,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:30:03,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:30:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-16 20:30:03,018 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-16 20:30:03,192 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:30:03,195 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:30:04,560 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:30:05,364 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:30:05,364 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 20:30:05,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:30:05 BoogieIcfgContainer [2022-11-16 20:30:05,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:30:05,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:30:05,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:30:05,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:30:05,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:30:01" (1/3) ... [2022-11-16 20:30:05,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346138ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:30:05, skipping insertion in model container [2022-11-16 20:30:05,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:02" (2/3) ... [2022-11-16 20:30:05,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346138ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:30:05, skipping insertion in model container [2022-11-16 20:30:05,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:30:05" (3/3) ... [2022-11-16 20:30:05,379 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product11.cil.c [2022-11-16 20:30:05,402 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:30:05,402 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:30:05,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:30:05,498 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;@768a1747, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:30:05,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:30:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-11-16 20:30:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 20:30:05,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:05,538 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:05,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1012587652, now seen corresponding path program 1 times [2022-11-16 20:30:05,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:05,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362995879] [2022-11-16 20:30:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:05,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 20:30:06,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362995879] [2022-11-16 20:30:06,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362995879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:06,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:06,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:30:06,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343210645] [2022-11-16 20:30:06,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:06,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:30:06,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:06,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:30:06,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:30:06,677 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 20:30:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:08,162 INFO L93 Difference]: Finished difference Result 1429 states and 2342 transitions. [2022-11-16 20:30:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:30:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-16 20:30:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:08,184 INFO L225 Difference]: With dead ends: 1429 [2022-11-16 20:30:08,185 INFO L226 Difference]: Without dead ends: 1027 [2022-11-16 20:30:08,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:30:08,196 INFO L413 NwaCegarLoop]: 946 mSDtfsCounter, 851 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 4136 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:08,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 4136 Invalid, 800 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [86 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 20:30:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-11-16 20:30:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 744. [2022-11-16 20:30:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 509 states have (on average 1.5658153241650294) internal successors, (797), 539 states have internal predecessors, (797), 190 states have call successors, (190), 47 states have call predecessors, (190), 44 states have return successors, (197), 177 states have call predecessors, (197), 186 states have call successors, (197) [2022-11-16 20:30:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1184 transitions. [2022-11-16 20:30:08,382 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1184 transitions. Word has length 87 [2022-11-16 20:30:08,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:08,383 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 1184 transitions. [2022-11-16 20:30:08,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 20:30:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1184 transitions. [2022-11-16 20:30:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 20:30:08,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:08,391 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:08,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:30:08,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:08,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:08,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1536212951, now seen corresponding path program 1 times [2022-11-16 20:30:08,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:08,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100379400] [2022-11-16 20:30:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:08,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:30:08,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:08,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100379400] [2022-11-16 20:30:08,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100379400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:08,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052940132] [2022-11-16 20:30:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:08,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:08,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:08,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:30:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:09,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:30:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:30:09,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:09,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052940132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:09,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:30:09,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 20:30:09,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858523723] [2022-11-16 20:30:09,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:09,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:30:09,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:09,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:30:09,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:30:09,403 INFO L87 Difference]: Start difference. First operand 744 states and 1184 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 20:30:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:09,631 INFO L93 Difference]: Finished difference Result 2108 states and 3421 transitions. [2022-11-16 20:30:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:30:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-16 20:30:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:09,641 INFO L225 Difference]: With dead ends: 2108 [2022-11-16 20:30:09,641 INFO L226 Difference]: Without dead ends: 1376 [2022-11-16 20:30:09,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:30:09,648 INFO L413 NwaCegarLoop]: 1028 mSDtfsCounter, 560 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:09,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1530 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:30:09,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2022-11-16 20:30:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1343. [2022-11-16 20:30:09,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 926 states have (on average 1.5755939524838012) internal successors, (1459), 985 states have internal predecessors, (1459), 333 states have call successors, (333), 84 states have call predecessors, (333), 83 states have return successors, (360), 313 states have call predecessors, (360), 329 states have call successors, (360) [2022-11-16 20:30:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2152 transitions. [2022-11-16 20:30:09,763 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2152 transitions. Word has length 86 [2022-11-16 20:30:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:09,764 INFO L495 AbstractCegarLoop]: Abstraction has 1343 states and 2152 transitions. [2022-11-16 20:30:09,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 20:30:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2152 transitions. [2022-11-16 20:30:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 20:30:09,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:09,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:09,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:09,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:09,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:09,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:09,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1494770255, now seen corresponding path program 1 times [2022-11-16 20:30:09,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:09,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137362270] [2022-11-16 20:30:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:09,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:30:10,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:10,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137362270] [2022-11-16 20:30:10,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137362270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:10,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107922756] [2022-11-16 20:30:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:10,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:10,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:10,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:10,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:30:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:10,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:30:10,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:10,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:10,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107922756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:10,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:30:10,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 20:30:10,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237947671] [2022-11-16 20:30:10,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:10,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:30:10,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:10,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:30:10,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:30:10,798 INFO L87 Difference]: Start difference. First operand 1343 states and 2152 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 20:30:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:11,046 INFO L93 Difference]: Finished difference Result 2919 states and 4760 transitions. [2022-11-16 20:30:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:30:11,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2022-11-16 20:30:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:11,059 INFO L225 Difference]: With dead ends: 2919 [2022-11-16 20:30:11,059 INFO L226 Difference]: Without dead ends: 1588 [2022-11-16 20:30:11,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:30:11,076 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 104 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:11,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1409 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:30:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-11-16 20:30:11,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1371. [2022-11-16 20:30:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 950 states have (on average 1.565263157894737) internal successors, (1487), 1009 states have internal predecessors, (1487), 337 states have call successors, (337), 84 states have call predecessors, (337), 83 states have return successors, (364), 317 states have call predecessors, (364), 333 states have call successors, (364) [2022-11-16 20:30:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2188 transitions. [2022-11-16 20:30:11,182 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2188 transitions. Word has length 88 [2022-11-16 20:30:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:11,183 INFO L495 AbstractCegarLoop]: Abstraction has 1371 states and 2188 transitions. [2022-11-16 20:30:11,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 20:30:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2188 transitions. [2022-11-16 20:30:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 20:30:11,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:11,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:11,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:11,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:11,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:11,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash -55875038, now seen corresponding path program 1 times [2022-11-16 20:30:11,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:11,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063205885] [2022-11-16 20:30:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:11,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:30:11,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:11,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063205885] [2022-11-16 20:30:11,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063205885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:11,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942382965] [2022-11-16 20:30:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:11,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:11,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:11,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:11,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:30:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:12,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:30:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:30:12,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:12,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942382965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:12,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:30:12,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 20:30:12,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205460437] [2022-11-16 20:30:12,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:12,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:30:12,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:12,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:30:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:30:12,265 INFO L87 Difference]: Start difference. First operand 1371 states and 2188 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 20:30:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:12,541 INFO L93 Difference]: Finished difference Result 3362 states and 5441 transitions. [2022-11-16 20:30:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:30:12,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2022-11-16 20:30:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:12,555 INFO L225 Difference]: With dead ends: 3362 [2022-11-16 20:30:12,555 INFO L226 Difference]: Without dead ends: 2003 [2022-11-16 20:30:12,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:30:12,565 INFO L413 NwaCegarLoop]: 1067 mSDtfsCounter, 560 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:12,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1569 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:30:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-16 20:30:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1958. [2022-11-16 20:30:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1361 states have (on average 1.5716385011021308) internal successors, (2139), 1449 states have internal predecessors, (2139), 477 states have call successors, (477), 118 states have call predecessors, (477), 119 states have return successors, (524), 450 states have call predecessors, (524), 473 states have call successors, (524) [2022-11-16 20:30:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 3140 transitions. [2022-11-16 20:30:12,686 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 3140 transitions. Word has length 87 [2022-11-16 20:30:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:12,687 INFO L495 AbstractCegarLoop]: Abstraction has 1958 states and 3140 transitions. [2022-11-16 20:30:12,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 20:30:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 3140 transitions. [2022-11-16 20:30:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 20:30:12,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:12,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:12,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 20:30:12,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:12,899 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:12,900 INFO L85 PathProgramCache]: Analyzing trace with hash -710537829, now seen corresponding path program 1 times [2022-11-16 20:30:12,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:12,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930796529] [2022-11-16 20:30:12,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:12,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:30:13,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:13,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930796529] [2022-11-16 20:30:13,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930796529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:13,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138743366] [2022-11-16 20:30:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:13,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:13,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:13,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:13,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:30:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:13,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:30:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:30:13,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:13,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138743366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:13,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:30:13,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 20:30:13,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793384197] [2022-11-16 20:30:13,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:13,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:30:13,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:13,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:30:13,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:30:13,748 INFO L87 Difference]: Start difference. First operand 1958 states and 3140 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 20:30:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:14,251 INFO L93 Difference]: Finished difference Result 5614 states and 9107 transitions. [2022-11-16 20:30:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:30:14,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-16 20:30:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:14,280 INFO L225 Difference]: With dead ends: 5614 [2022-11-16 20:30:14,281 INFO L226 Difference]: Without dead ends: 3669 [2022-11-16 20:30:14,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:30:14,301 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 493 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:14,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1232 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:30:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2022-11-16 20:30:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 3641. [2022-11-16 20:30:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 2511 states have (on average 1.5205097570688968) internal successors, (3818), 2685 states have internal predecessors, (3818), 902 states have call successors, (902), 230 states have call predecessors, (902), 227 states have return successors, (1033), 839 states have call predecessors, (1033), 896 states have call successors, (1033) [2022-11-16 20:30:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 5753 transitions. [2022-11-16 20:30:14,609 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 5753 transitions. Word has length 88 [2022-11-16 20:30:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:14,610 INFO L495 AbstractCegarLoop]: Abstraction has 3641 states and 5753 transitions. [2022-11-16 20:30:14,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 20:30:14,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 5753 transitions. [2022-11-16 20:30:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 20:30:14,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:14,616 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:14,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:14,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:14,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1825455868, now seen corresponding path program 1 times [2022-11-16 20:30:14,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:14,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344783352] [2022-11-16 20:30:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:14,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 20:30:15,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:15,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344783352] [2022-11-16 20:30:15,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344783352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:15,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225168462] [2022-11-16 20:30:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:15,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:15,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:15,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:15,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:30:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:15,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:30:15,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:30:15,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:15,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225168462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:15,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:30:15,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-16 20:30:15,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349206744] [2022-11-16 20:30:15,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:15,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:30:15,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:30:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:30:15,655 INFO L87 Difference]: Start difference. First operand 3641 states and 5753 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-16 20:30:16,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:16,891 INFO L93 Difference]: Finished difference Result 7345 states and 11746 transitions. [2022-11-16 20:30:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:30:16,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-16 20:30:16,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:16,916 INFO L225 Difference]: With dead ends: 7345 [2022-11-16 20:30:16,916 INFO L226 Difference]: Without dead ends: 3716 [2022-11-16 20:30:16,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-16 20:30:16,944 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 630 mSDsluCounter, 2571 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:16,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 3268 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 20:30:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2022-11-16 20:30:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3700. [2022-11-16 20:30:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 2484 states have (on average 1.5056360708534622) internal successors, (3740), 2705 states have internal predecessors, (3740), 1006 states have call successors, (1006), 210 states have call predecessors, (1006), 209 states have return successors, (1155), 920 states have call predecessors, (1155), 1000 states have call successors, (1155) [2022-11-16 20:30:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 5901 transitions. [2022-11-16 20:30:17,197 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 5901 transitions. Word has length 89 [2022-11-16 20:30:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:17,199 INFO L495 AbstractCegarLoop]: Abstraction has 3700 states and 5901 transitions. [2022-11-16 20:30:17,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-16 20:30:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 5901 transitions. [2022-11-16 20:30:17,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-16 20:30:17,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:17,202 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:17,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:17,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 20:30:17,410 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1184986203, now seen corresponding path program 1 times [2022-11-16 20:30:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:17,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145793690] [2022-11-16 20:30:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:17,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 20:30:18,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:18,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145793690] [2022-11-16 20:30:18,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145793690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:18,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766990703] [2022-11-16 20:30:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:18,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:18,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:18,143 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:18,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:30:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:18,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:30:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 20:30:18,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:18,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766990703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:18,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:30:18,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-16 20:30:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409971331] [2022-11-16 20:30:18,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:30:18,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:30:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:30:18,871 INFO L87 Difference]: Start difference. First operand 3700 states and 5901 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-16 20:30:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:21,551 INFO L93 Difference]: Finished difference Result 9174 states and 14947 transitions. [2022-11-16 20:30:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:30:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2022-11-16 20:30:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:21,594 INFO L225 Difference]: With dead ends: 9174 [2022-11-16 20:30:21,594 INFO L226 Difference]: Without dead ends: 5486 [2022-11-16 20:30:21,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:30:21,618 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 1606 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 2442 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:21,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1664 Valid, 2442 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-16 20:30:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2022-11-16 20:30:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 4040. [2022-11-16 20:30:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4040 states, 2740 states have (on average 1.4883211678832118) internal successors, (4078), 2969 states have internal predecessors, (4078), 1066 states have call successors, (1066), 238 states have call predecessors, (1066), 233 states have return successors, (1217), 968 states have call predecessors, (1217), 1060 states have call successors, (1217) [2022-11-16 20:30:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4040 states to 4040 states and 6361 transitions. [2022-11-16 20:30:21,973 INFO L78 Accepts]: Start accepts. Automaton has 4040 states and 6361 transitions. Word has length 94 [2022-11-16 20:30:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:21,974 INFO L495 AbstractCegarLoop]: Abstraction has 4040 states and 6361 transitions. [2022-11-16 20:30:21,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-16 20:30:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4040 states and 6361 transitions. [2022-11-16 20:30:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-16 20:30:21,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:21,977 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:21,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:22,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 20:30:22,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:22,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:22,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1095828346, now seen corresponding path program 1 times [2022-11-16 20:30:22,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:22,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511556866] [2022-11-16 20:30:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:22,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 20:30:22,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:22,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511556866] [2022-11-16 20:30:22,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511556866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:22,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300342618] [2022-11-16 20:30:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:22,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:22,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:22,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:22,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:30:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:23,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1618 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:30:23,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:30:23,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:23,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300342618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:23,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:30:23,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-16 20:30:23,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66525422] [2022-11-16 20:30:23,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:23,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:30:23,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:23,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:30:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-16 20:30:23,234 INFO L87 Difference]: Start difference. First operand 4040 states and 6361 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 20:30:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:23,924 INFO L93 Difference]: Finished difference Result 8425 states and 13562 transitions. [2022-11-16 20:30:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:30:23,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2022-11-16 20:30:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:23,971 INFO L225 Difference]: With dead ends: 8425 [2022-11-16 20:30:23,972 INFO L226 Difference]: Without dead ends: 5206 [2022-11-16 20:30:23,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:30:23,990 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 139 mSDsluCounter, 2493 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:23,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 3146 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:30:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2022-11-16 20:30:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 4264. [2022-11-16 20:30:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 2892 states have (on average 1.4827109266943292) internal successors, (4288), 3142 states have internal predecessors, (4288), 1125 states have call successors, (1125), 238 states have call predecessors, (1125), 246 states have return successors, (1316), 1037 states have call predecessors, (1316), 1119 states have call successors, (1316) [2022-11-16 20:30:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 6729 transitions. [2022-11-16 20:30:24,483 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 6729 transitions. Word has length 99 [2022-11-16 20:30:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:24,483 INFO L495 AbstractCegarLoop]: Abstraction has 4264 states and 6729 transitions. [2022-11-16 20:30:24,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 20:30:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 6729 transitions. [2022-11-16 20:30:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 20:30:24,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:24,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:24,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:24,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:24,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1147227239, now seen corresponding path program 1 times [2022-11-16 20:30:24,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:24,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668818448] [2022-11-16 20:30:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:24,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 20:30:25,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:25,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668818448] [2022-11-16 20:30:25,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668818448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:25,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766499739] [2022-11-16 20:30:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:25,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:25,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:25,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:25,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:30:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:25,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:30:25,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:26,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 20:30:26,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766499739] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:26,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:30:26,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-16 20:30:26,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174637999] [2022-11-16 20:30:26,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:26,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:30:26,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:30:26,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-16 20:30:26,403 INFO L87 Difference]: Start difference. First operand 4264 states and 6729 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 20:30:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:30,758 INFO L93 Difference]: Finished difference Result 11670 states and 19372 transitions. [2022-11-16 20:30:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 20:30:30,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2022-11-16 20:30:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:30,837 INFO L225 Difference]: With dead ends: 11670 [2022-11-16 20:30:30,837 INFO L226 Difference]: Without dead ends: 8593 [2022-11-16 20:30:30,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 20:30:30,864 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 3068 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 2571 mSolverCounterSat, 1424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3153 SdHoareTripleChecker+Valid, 2806 SdHoareTripleChecker+Invalid, 3995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1424 IncrementalHoareTripleChecker+Valid, 2571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:30,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3153 Valid, 2806 Invalid, 3995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1424 Valid, 2571 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-16 20:30:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2022-11-16 20:30:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 7392. [2022-11-16 20:30:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7392 states, 5230 states have (on average 1.4862332695984704) internal successors, (7773), 5520 states have internal predecessors, (7773), 1655 states have call successors, (1655), 468 states have call predecessors, (1655), 506 states have return successors, (2384), 1547 states have call predecessors, (2384), 1647 states have call successors, (2384) [2022-11-16 20:30:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7392 states to 7392 states and 11812 transitions. [2022-11-16 20:30:31,613 INFO L78 Accepts]: Start accepts. Automaton has 7392 states and 11812 transitions. Word has length 103 [2022-11-16 20:30:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:31,613 INFO L495 AbstractCegarLoop]: Abstraction has 7392 states and 11812 transitions. [2022-11-16 20:30:31,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 20:30:31,615 INFO L276 IsEmpty]: Start isEmpty. Operand 7392 states and 11812 transitions. [2022-11-16 20:30:31,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-16 20:30:31,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:31,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:31,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:31,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:31,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash 91050475, now seen corresponding path program 1 times [2022-11-16 20:30:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:31,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607794804] [2022-11-16 20:30:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:31,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 20:30:32,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:32,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607794804] [2022-11-16 20:30:32,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607794804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:32,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881472813] [2022-11-16 20:30:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:32,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:32,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:32,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:32,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 20:30:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:30:32,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:33,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:33,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881472813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:33,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:30:33,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-16 20:30:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103995527] [2022-11-16 20:30:33,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:33,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:30:33,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:30:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:30:33,046 INFO L87 Difference]: Start difference. First operand 7392 states and 11812 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-16 20:30:34,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:34,212 INFO L93 Difference]: Finished difference Result 13611 states and 21796 transitions. [2022-11-16 20:30:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:30:34,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2022-11-16 20:30:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:34,262 INFO L225 Difference]: With dead ends: 13611 [2022-11-16 20:30:34,263 INFO L226 Difference]: Without dead ends: 7414 [2022-11-16 20:30:34,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:30:34,299 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 417 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:34,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 2579 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:30:34,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2022-11-16 20:30:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 7392. [2022-11-16 20:30:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7392 states, 5230 states have (on average 1.4862332695984704) internal successors, (7773), 5520 states have internal predecessors, (7773), 1655 states have call successors, (1655), 468 states have call predecessors, (1655), 506 states have return successors, (2376), 1547 states have call predecessors, (2376), 1647 states have call successors, (2376) [2022-11-16 20:30:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7392 states to 7392 states and 11804 transitions. [2022-11-16 20:30:35,027 INFO L78 Accepts]: Start accepts. Automaton has 7392 states and 11804 transitions. Word has length 107 [2022-11-16 20:30:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:35,028 INFO L495 AbstractCegarLoop]: Abstraction has 7392 states and 11804 transitions. [2022-11-16 20:30:35,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-16 20:30:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 7392 states and 11804 transitions. [2022-11-16 20:30:35,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 20:30:35,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:35,033 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:35,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:35,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 20:30:35,241 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:35,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1325625754, now seen corresponding path program 1 times [2022-11-16 20:30:35,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:35,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488560218] [2022-11-16 20:30:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:35,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 20:30:35,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:35,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488560218] [2022-11-16 20:30:35,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488560218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:35,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345984940] [2022-11-16 20:30:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:35,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:35,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:35,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:35,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 20:30:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:36,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:30:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-16 20:30:36,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:36,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345984940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:36,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:30:36,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-16 20:30:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559417352] [2022-11-16 20:30:36,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:36,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:30:36,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:30:36,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:30:36,501 INFO L87 Difference]: Start difference. First operand 7392 states and 11804 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-16 20:30:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:38,825 INFO L93 Difference]: Finished difference Result 25166 states and 43201 transitions. [2022-11-16 20:30:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:30:38,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2022-11-16 20:30:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:38,977 INFO L225 Difference]: With dead ends: 25166 [2022-11-16 20:30:38,978 INFO L226 Difference]: Without dead ends: 17786 [2022-11-16 20:30:39,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:30:39,044 INFO L413 NwaCegarLoop]: 989 mSDtfsCounter, 790 mSDsluCounter, 3294 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 4283 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:39,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 4283 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 20:30:39,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17786 states. [2022-11-16 20:30:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17786 to 14694. [2022-11-16 20:30:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14694 states, 10428 states have (on average 1.4822593018795551) internal successors, (15457), 11020 states have internal predecessors, (15457), 3299 states have call successors, (3299), 887 states have call predecessors, (3299), 966 states have return successors, (5497), 3032 states have call predecessors, (5497), 3287 states have call successors, (5497) [2022-11-16 20:30:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14694 states to 14694 states and 24253 transitions. [2022-11-16 20:30:40,782 INFO L78 Accepts]: Start accepts. Automaton has 14694 states and 24253 transitions. Word has length 134 [2022-11-16 20:30:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:40,782 INFO L495 AbstractCegarLoop]: Abstraction has 14694 states and 24253 transitions. [2022-11-16 20:30:40,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-16 20:30:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 14694 states and 24253 transitions. [2022-11-16 20:30:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 20:30:40,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:40,790 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:40,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 20:30:40,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2092019348, now seen corresponding path program 1 times [2022-11-16 20:30:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:40,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267905663] [2022-11-16 20:30:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:40,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 20:30:41,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:41,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267905663] [2022-11-16 20:30:41,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267905663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:41,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:41,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 20:30:41,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042486637] [2022-11-16 20:30:41,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:41,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 20:30:41,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:41,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 20:30:41,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-16 20:30:41,788 INFO L87 Difference]: Start difference. First operand 14694 states and 24253 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-16 20:30:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:51,431 INFO L93 Difference]: Finished difference Result 55438 states and 95762 transitions. [2022-11-16 20:30:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 20:30:51,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2022-11-16 20:30:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:51,757 INFO L225 Difference]: With dead ends: 55438 [2022-11-16 20:30:51,757 INFO L226 Difference]: Without dead ends: 40756 [2022-11-16 20:30:51,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 20:30:51,877 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 3574 mSDsluCounter, 3575 mSDsCounter, 0 mSdLazyCounter, 7526 mSolverCounterSat, 1637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3677 SdHoareTripleChecker+Valid, 4131 SdHoareTripleChecker+Invalid, 9163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1637 IncrementalHoareTripleChecker+Valid, 7526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:51,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3677 Valid, 4131 Invalid, 9163 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1637 Valid, 7526 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-16 20:30:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40756 states. [2022-11-16 20:30:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40756 to 35261. [2022-11-16 20:30:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35261 states, 26040 states have (on average 1.4866743471582182) internal successors, (38713), 26992 states have internal predecessors, (38713), 6492 states have call successors, (6492), 2463 states have call predecessors, (6492), 2728 states have return successors, (10659), 6231 states have call predecessors, (10659), 6472 states have call successors, (10659) [2022-11-16 20:30:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35261 states to 35261 states and 55864 transitions. [2022-11-16 20:30:55,641 INFO L78 Accepts]: Start accepts. Automaton has 35261 states and 55864 transitions. Word has length 140 [2022-11-16 20:30:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:55,641 INFO L495 AbstractCegarLoop]: Abstraction has 35261 states and 55864 transitions. [2022-11-16 20:30:55,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-16 20:30:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 35261 states and 55864 transitions. [2022-11-16 20:30:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-16 20:30:55,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:55,653 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:55,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 20:30:55,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:55,654 INFO L85 PathProgramCache]: Analyzing trace with hash -648347971, now seen corresponding path program 1 times [2022-11-16 20:30:55,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:55,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912902050] [2022-11-16 20:30:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:55,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-16 20:30:55,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:55,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912902050] [2022-11-16 20:30:55,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912902050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:55,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:55,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:30:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508380301] [2022-11-16 20:30:55,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:55,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:30:55,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:30:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:30:55,786 INFO L87 Difference]: Start difference. First operand 35261 states and 55864 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 20:31:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:00,142 INFO L93 Difference]: Finished difference Result 82310 states and 132218 transitions. [2022-11-16 20:31:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:00,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 172 [2022-11-16 20:31:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:00,470 INFO L225 Difference]: With dead ends: 82310 [2022-11-16 20:31:00,471 INFO L226 Difference]: Without dead ends: 47061 [2022-11-16 20:31:00,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:00,942 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 520 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:00,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1382 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:31:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47061 states. [2022-11-16 20:31:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47061 to 46692. [2022-11-16 20:31:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46692 states, 34523 states have (on average 1.4873562552501232) internal successors, (51348), 35801 states have internal predecessors, (51348), 8544 states have call successors, (8544), 3253 states have call predecessors, (8544), 3624 states have return successors, (14142), 8207 states have call predecessors, (14142), 8524 states have call successors, (14142) [2022-11-16 20:31:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46692 states to 46692 states and 74034 transitions. [2022-11-16 20:31:05,152 INFO L78 Accepts]: Start accepts. Automaton has 46692 states and 74034 transitions. Word has length 172 [2022-11-16 20:31:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:05,153 INFO L495 AbstractCegarLoop]: Abstraction has 46692 states and 74034 transitions. [2022-11-16 20:31:05,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 20:31:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 46692 states and 74034 transitions. [2022-11-16 20:31:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-16 20:31:05,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:05,169 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:31:05,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 20:31:05,169 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:31:05,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:05,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1939752274, now seen corresponding path program 1 times [2022-11-16 20:31:05,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:05,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473909195] [2022-11-16 20:31:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:05,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-16 20:31:05,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473909195] [2022-11-16 20:31:05,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473909195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:31:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009166323] [2022-11-16 20:31:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:05,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:31:05,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:31:05,805 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:31:05,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523ce4e4-aa7e-4ed1-9fec-7c84a661fa74/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 20:31:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:31:06,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 20:31:06,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 20:31:06,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009166323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:06,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1783115626] [2022-11-16 20:31:06,737 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-11-16 20:31:06,737 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:31:06,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:31:06,748 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:31:06,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:31:15,276 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2022-11-16 20:31:23,134 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-11-16 20:31:23,137 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 58 for LOIs [2022-11-16 20:31:23,613 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 33 for LOIs [2022-11-16 20:31:23,640 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 49 for LOIs [2022-11-16 20:31:23,782 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 33 for LOIs [2022-11-16 20:31:23,792 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 51 for LOIs [2022-11-16 20:31:23,805 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 597 for LOIs [2022-11-16 20:31:25,828 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 571 for LOIs [2022-11-16 20:31:26,068 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 49 for LOIs [2022-11-16 20:31:26,074 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 43 for LOIs [2022-11-16 20:31:26,088 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 54 for LOIs [2022-11-16 20:31:26,100 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 571 for LOIs