./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9 --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 ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 --- 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-6b4ec56 [2022-11-20 19:48:06,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:48:06,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:48:06,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:48:06,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:48:06,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:48:06,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:48:06,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:48:06,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:48:06,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:48:06,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:48:06,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:48:06,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:48:06,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:48:06,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:48:06,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:48:06,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:48:06,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:48:06,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:48:06,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:48:06,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:48:06,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:48:06,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:48:06,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:48:06,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:48:06,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:48:06,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:48:06,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:48:06,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:48:06,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:48:06,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:48:06,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:48:06,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:48:06,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:48:06,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:48:06,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:48:06,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:48:06,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:48:06,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:48:06,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:48:06,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:48:06,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:48:06,260 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:48:06,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:48:06,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:48:06,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:48:06,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:48:06,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:48:06,263 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:48:06,263 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:48:06,263 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:48:06,263 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:48:06,264 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:48:06,264 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:48:06,264 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:48:06,264 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:48:06,265 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:48:06,265 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:48:06,265 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:48:06,265 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:48:06,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:48:06,266 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:48:06,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:48:06,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:48:06,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:48:06,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:48:06,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:48:06,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:48:06,268 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:48:06,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:48:06,269 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:48:06,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:48:06,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:48:06,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:48:06,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:48:06,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:48:06,270 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:48:06,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:48:06,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:48:06,271 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:48:06,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:48:06,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:48:06,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:48:06,272 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_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 [2022-11-20 19:48:06,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:48:06,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:48:06,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:48:06,688 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:48:06,688 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:48:06,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2022-11-20 19:48:10,104 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:48:10,488 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:48:10,489 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2022-11-20 19:48:10,525 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/data/b9ddcd144/13dcf8d42f4341e8b68da8362dab590e/FLAG3850e8de3 [2022-11-20 19:48:10,567 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/data/b9ddcd144/13dcf8d42f4341e8b68da8362dab590e [2022-11-20 19:48:10,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:48:10,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:48:10,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:48:10,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:48:10,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:48:10,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:48:10" (1/1) ... [2022-11-20 19:48:10,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@513b2f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:10, skipping insertion in model container [2022-11-20 19:48:10,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:48:10" (1/1) ... [2022-11-20 19:48:10,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:48:10,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:48:11,238 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2022-11-20 19:48:11,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:48:11,447 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:48:11,516 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2022-11-20 19:48:11,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:48:11,615 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:48:11,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11 WrapperNode [2022-11-20 19:48:11,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:48:11,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:48:11,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:48:11,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:48:11,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,712 INFO L138 Inliner]: procedures = 90, calls = 342, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 1043 [2022-11-20 19:48:11,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:48:11,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:48:11,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:48:11,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:48:11,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,783 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:48:11,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:48:11,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:48:11,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:48:11,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (1/1) ... [2022-11-20 19:48:11,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:48:11,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:11,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:48:11,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:48:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:48:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-20 19:48:11,924 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-20 19:48:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-20 19:48:11,925 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-20 19:48:11,926 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-20 19:48:11,926 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-20 19:48:11,927 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-20 19:48:11,927 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-20 19:48:11,927 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-20 19:48:11,927 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-20 19:48:11,928 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-20 19:48:11,928 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-20 19:48:11,928 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 19:48:11,928 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 19:48:11,929 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-20 19:48:11,930 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-20 19:48:11,930 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-20 19:48:11,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-20 19:48:11,930 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-20 19:48:11,931 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-20 19:48:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-20 19:48:11,932 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-20 19:48:11,933 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-20 19:48:11,933 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-20 19:48:11,934 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-20 19:48:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-20 19:48:11,935 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-20 19:48:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-20 19:48:11,935 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-20 19:48:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-20 19:48:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-20 19:48:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-20 19:48:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-20 19:48:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-20 19:48:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-20 19:48:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-20 19:48:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-20 19:48:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-20 19:48:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-20 19:48:11,941 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-20 19:48:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-20 19:48:11,941 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-20 19:48:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:48:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-20 19:48:11,942 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-20 19:48:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-20 19:48:11,943 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-20 19:48:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-20 19:48:11,946 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-20 19:48:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-20 19:48:11,946 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-20 19:48:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:48:11,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:48:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-20 19:48:11,948 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-20 19:48:12,233 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:48:12,237 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:48:13,856 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:48:14,787 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:48:14,787 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 19:48:14,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:48:14 BoogieIcfgContainer [2022-11-20 19:48:14,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:48:14,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:48:14,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:48:14,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:48:14,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:48:10" (1/3) ... [2022-11-20 19:48:14,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbcf70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:48:14, skipping insertion in model container [2022-11-20 19:48:14,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:11" (2/3) ... [2022-11-20 19:48:14,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbcf70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:48:14, skipping insertion in model container [2022-11-20 19:48:14,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:48:14" (3/3) ... [2022-11-20 19:48:14,804 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product03.cil.c [2022-11-20 19:48:14,828 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:48:14,828 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:48:14,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:48:14,938 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;@7fa9a8b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:48:14,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:48:14,946 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) [2022-11-20 19:48:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 19:48:14,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:14,970 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] [2022-11-20 19:48:14,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:14,977 INFO L85 PathProgramCache]: Analyzing trace with hash -336537817, now seen corresponding path program 1 times [2022-11-20 19:48:14,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:14,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077384824] [2022-11-20 19:48:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:14,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:48:16,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:16,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077384824] [2022-11-20 19:48:16,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077384824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:16,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284404181] [2022-11-20 19:48:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:16,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:16,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:16,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:16,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:48:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:48:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:48:16,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:48:16,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284404181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:16,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:48:16,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 19:48:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005162185] [2022-11-20 19:48:16,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:16,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:48:16,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:48:16,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:16,826 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 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), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 19:48:17,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:17,218 INFO L93 Difference]: Finished difference Result 1135 states and 1815 transitions. [2022-11-20 19:48:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:48:17,222 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), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-20 19:48:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:17,251 INFO L225 Difference]: With dead ends: 1135 [2022-11-20 19:48:17,252 INFO L226 Difference]: Without dead ends: 733 [2022-11-20 19:48:17,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:17,268 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 506 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:17,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1286 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:48:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-11-20 19:48:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 721. [2022-11-20 19:48:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 487 states have (on average 1.566735112936345) internal successors, (763), 518 states have internal predecessors, (763), 187 states have call successors, (187), 47 states have call predecessors, (187), 46 states have return successors, (189), 181 states have call predecessors, (189), 184 states have call successors, (189) [2022-11-20 19:48:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1139 transitions. [2022-11-20 19:48:17,414 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1139 transitions. Word has length 87 [2022-11-20 19:48:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:17,416 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1139 transitions. [2022-11-20 19:48:17,416 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), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 19:48:17,416 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1139 transitions. [2022-11-20 19:48:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 19:48:17,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:17,433 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] [2022-11-20 19:48:17,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:17,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 19:48:17,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:17,643 INFO L85 PathProgramCache]: Analyzing trace with hash -903324750, now seen corresponding path program 1 times [2022-11-20 19:48:17,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:17,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871916131] [2022-11-20 19:48:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:17,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:48:18,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:18,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871916131] [2022-11-20 19:48:18,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871916131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:18,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684641075] [2022-11-20 19:48:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:18,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:18,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:18,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:18,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:48:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:18,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:48:18,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 19:48:18,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:48:18,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684641075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:18,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:48:18,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 19:48:18,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60100725] [2022-11-20 19:48:18,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:18,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:48:18,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:48:18,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:18,722 INFO L87 Difference]: Start difference. First operand 721 states and 1139 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) [2022-11-20 19:48:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:18,968 INFO L93 Difference]: Finished difference Result 1765 states and 2819 transitions. [2022-11-20 19:48:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:48:18,969 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 [2022-11-20 19:48:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:18,980 INFO L225 Difference]: With dead ends: 1765 [2022-11-20 19:48:18,980 INFO L226 Difference]: Without dead ends: 1056 [2022-11-20 19:48:18,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:18,987 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 561 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:18,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1175 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:48:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-11-20 19:48:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1032. [2022-11-20 19:48:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 701 states have (on average 1.5748930099857346) internal successors, (1104), 747 states have internal predecessors, (1104), 265 states have call successors, (265), 65 states have call predecessors, (265), 65 states have return successors, (272), 258 states have call predecessors, (272), 262 states have call successors, (272) [2022-11-20 19:48:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1641 transitions. [2022-11-20 19:48:19,099 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1641 transitions. Word has length 86 [2022-11-20 19:48:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:19,102 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1641 transitions. [2022-11-20 19:48:19,102 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) [2022-11-20 19:48:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1641 transitions. [2022-11-20 19:48:19,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 19:48:19,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:19,111 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] [2022-11-20 19:48:19,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:19,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:19,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:19,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1454362349, now seen corresponding path program 1 times [2022-11-20 19:48:19,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:19,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634138309] [2022-11-20 19:48:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:19,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 19:48:20,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:20,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634138309] [2022-11-20 19:48:20,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634138309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:20,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:20,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 19:48:20,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570670319] [2022-11-20 19:48:20,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:20,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:48:20,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:48:20,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:48:20,008 INFO L87 Difference]: Start difference. First operand 1032 states and 1641 transitions. 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) [2022-11-20 19:48:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:21,388 INFO L93 Difference]: Finished difference Result 3493 states and 5724 transitions. [2022-11-20 19:48:21,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:48:21,388 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 [2022-11-20 19:48:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:21,412 INFO L225 Difference]: With dead ends: 3493 [2022-11-20 19:48:21,412 INFO L226 Difference]: Without dead ends: 2473 [2022-11-20 19:48:21,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:48:21,425 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 825 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 4216 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:21,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 4216 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 19:48:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-11-20 19:48:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1930. [2022-11-20 19:48:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1337 states have (on average 1.5818997756170532) internal successors, (2115), 1425 states have internal predecessors, (2115), 473 states have call successors, (473), 118 states have call predecessors, (473), 119 states have return successors, (520), 446 states have call predecessors, (520), 469 states have call successors, (520) [2022-11-20 19:48:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3108 transitions. [2022-11-20 19:48:21,629 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3108 transitions. Word has length 87 [2022-11-20 19:48:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:21,629 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 3108 transitions. [2022-11-20 19:48:21,630 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) [2022-11-20 19:48:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3108 transitions. [2022-11-20 19:48:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 19:48:21,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:21,637 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] [2022-11-20 19:48:21,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 19:48:21,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1056566648, now seen corresponding path program 1 times [2022-11-20 19:48:21,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:21,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163089682] [2022-11-20 19:48:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:21,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:48:22,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163089682] [2022-11-20 19:48:22,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163089682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281587312] [2022-11-20 19:48:22,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:22,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:22,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:22,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:22,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:48:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:22,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 19:48:22,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 19:48:22,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:48:22,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281587312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:22,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:48:22,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 19:48:22,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459699613] [2022-11-20 19:48:22,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:22,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:48:22,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:22,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:48:22,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:22,667 INFO L87 Difference]: Start difference. First operand 1930 states and 3108 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) [2022-11-20 19:48:23,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:23,161 INFO L93 Difference]: Finished difference Result 5530 states and 9011 transitions. [2022-11-20 19:48:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:48:23,162 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 [2022-11-20 19:48:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:23,191 INFO L225 Difference]: With dead ends: 5530 [2022-11-20 19:48:23,191 INFO L226 Difference]: Without dead ends: 3613 [2022-11-20 19:48:23,212 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 [2022-11-20 19:48:23,216 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 [2022-11-20 19:48:23,217 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] [2022-11-20 19:48:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2022-11-20 19:48:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3585. [2022-11-20 19:48:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 2463 states have (on average 1.5306536743808363) internal successors, (3770), 2637 states have internal predecessors, (3770), 894 states have call successors, (894), 230 states have call predecessors, (894), 227 states have return successors, (1025), 831 states have call predecessors, (1025), 888 states have call successors, (1025) [2022-11-20 19:48:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 5689 transitions. [2022-11-20 19:48:23,502 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 5689 transitions. Word has length 88 [2022-11-20 19:48:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:23,502 INFO L495 AbstractCegarLoop]: Abstraction has 3585 states and 5689 transitions. [2022-11-20 19:48:23,503 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) [2022-11-20 19:48:23,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 5689 transitions. [2022-11-20 19:48:23,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-20 19:48:23,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:23,507 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] [2022-11-20 19:48:23,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:23,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:23,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash 766299694, now seen corresponding path program 1 times [2022-11-20 19:48:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:23,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623254236] [2022-11-20 19:48:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 19:48:24,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623254236] [2022-11-20 19:48:24,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623254236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:24,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970174615] [2022-11-20 19:48:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:24,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:24,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:24,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:24,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 19:48:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:24,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:48:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 19:48:24,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:48:24,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970174615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:24,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:48:24,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-20 19:48:24,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29977435] [2022-11-20 19:48:24,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:24,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:48:24,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:24,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:48:24,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:48:24,658 INFO L87 Difference]: Start difference. First operand 3585 states and 5689 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) [2022-11-20 19:48:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:26,042 INFO L93 Difference]: Finished difference Result 7326 states and 11781 transitions. [2022-11-20 19:48:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:48:26,043 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 [2022-11-20 19:48:26,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:26,071 INFO L225 Difference]: With dead ends: 7326 [2022-11-20 19:48:26,071 INFO L226 Difference]: Without dead ends: 3753 [2022-11-20 19:48:26,102 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 [2022-11-20 19:48:26,105 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 639 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:26,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 3283 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 19:48:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2022-11-20 19:48:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 3735. [2022-11-20 19:48:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 2503 states have (on average 1.5101877746703956) internal successors, (3780), 2725 states have internal predecessors, (3780), 1014 states have call successors, (1014), 214 states have call predecessors, (1014), 217 states have return successors, (1204), 931 states have call predecessors, (1204), 1008 states have call successors, (1204) [2022-11-20 19:48:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 5998 transitions. [2022-11-20 19:48:26,409 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 5998 transitions. Word has length 89 [2022-11-20 19:48:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:26,410 INFO L495 AbstractCegarLoop]: Abstraction has 3735 states and 5998 transitions. [2022-11-20 19:48:26,410 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) [2022-11-20 19:48:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 5998 transitions. [2022-11-20 19:48:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 19:48:26,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:26,413 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] [2022-11-20 19:48:26,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:26,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:26,622 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:26,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1544903673, now seen corresponding path program 1 times [2022-11-20 19:48:26,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:26,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252463078] [2022-11-20 19:48:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:26,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 19:48:26,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:26,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252463078] [2022-11-20 19:48:26,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252463078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:26,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402295357] [2022-11-20 19:48:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:26,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:26,926 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:26,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:48:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:27,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:48:27,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:48:27,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:48:27,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402295357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:27,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:48:27,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 19:48:27,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310233671] [2022-11-20 19:48:27,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:27,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:48:27,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:27,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:48:27,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:27,479 INFO L87 Difference]: Start difference. First operand 3735 states and 5998 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 19:48:27,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:27,958 INFO L93 Difference]: Finished difference Result 8179 states and 13214 transitions. [2022-11-20 19:48:27,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:48:27,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-20 19:48:27,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:28,001 INFO L225 Difference]: With dead ends: 8179 [2022-11-20 19:48:28,001 INFO L226 Difference]: Without dead ends: 4456 [2022-11-20 19:48:28,035 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 [2022-11-20 19:48:28,039 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 559 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:28,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1274 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:48:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2022-11-20 19:48:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 3672. [2022-11-20 19:48:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 2460 states have (on average 1.5089430894308944) internal successors, (3712), 2681 states have internal predecessors, (3712), 1002 states have call successors, (1002), 210 states have call predecessors, (1002), 209 states have return successors, (1151), 916 states have call predecessors, (1151), 996 states have call successors, (1151) [2022-11-20 19:48:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 5865 transitions. [2022-11-20 19:48:28,415 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 5865 transitions. Word has length 88 [2022-11-20 19:48:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:28,416 INFO L495 AbstractCegarLoop]: Abstraction has 3672 states and 5865 transitions. [2022-11-20 19:48:28,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 19:48:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 5865 transitions. [2022-11-20 19:48:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-20 19:48:28,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:28,419 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] [2022-11-20 19:48:28,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:28,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:28,628 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:28,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:28,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1736239229, now seen corresponding path program 1 times [2022-11-20 19:48:28,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:28,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274345396] [2022-11-20 19:48:28,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:28,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 19:48:29,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:29,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274345396] [2022-11-20 19:48:29,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274345396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:29,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800974903] [2022-11-20 19:48:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:29,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:29,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:29,578 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:29,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 19:48:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:30,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:48:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 19:48:30,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:48:30,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800974903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:30,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:48:30,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-20 19:48:30,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386577036] [2022-11-20 19:48:30,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:30,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:48:30,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:30,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:48:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-20 19:48:30,361 INFO L87 Difference]: Start difference. First operand 3672 states and 5865 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) [2022-11-20 19:48:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:33,746 INFO L93 Difference]: Finished difference Result 9118 states and 14875 transitions. [2022-11-20 19:48:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:48:33,747 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 [2022-11-20 19:48:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:33,804 INFO L225 Difference]: With dead ends: 9118 [2022-11-20 19:48:33,804 INFO L226 Difference]: Without dead ends: 5458 [2022-11-20 19:48:33,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-20 19:48:33,834 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 1610 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:33,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 2433 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 19:48:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2022-11-20 19:48:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 4012. [2022-11-20 19:48:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4012 states, 2716 states have (on average 1.4911634756995582) internal successors, (4050), 2945 states have internal predecessors, (4050), 1062 states have call successors, (1062), 238 states have call predecessors, (1062), 233 states have return successors, (1213), 964 states have call predecessors, (1213), 1056 states have call successors, (1213) [2022-11-20 19:48:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4012 states to 4012 states and 6325 transitions. [2022-11-20 19:48:34,373 INFO L78 Accepts]: Start accepts. Automaton has 4012 states and 6325 transitions. Word has length 94 [2022-11-20 19:48:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:34,374 INFO L495 AbstractCegarLoop]: Abstraction has 4012 states and 6325 transitions. [2022-11-20 19:48:34,374 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) [2022-11-20 19:48:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4012 states and 6325 transitions. [2022-11-20 19:48:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 19:48:34,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:34,378 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] [2022-11-20 19:48:34,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:34,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 19:48:34,586 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:34,587 INFO L85 PathProgramCache]: Analyzing trace with hash 734653633, now seen corresponding path program 1 times [2022-11-20 19:48:34,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:34,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239928291] [2022-11-20 19:48:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:34,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 19:48:35,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:35,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239928291] [2022-11-20 19:48:35,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239928291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:35,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059530684] [2022-11-20 19:48:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:35,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:35,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:35,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 19:48:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:35,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1618 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:48:35,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:48:35,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:48:35,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059530684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:35,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:48:35,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-20 19:48:35,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967742385] [2022-11-20 19:48:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:35,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:48:35,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:48:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:48:35,907 INFO L87 Difference]: Start difference. First operand 4012 states and 6325 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) [2022-11-20 19:48:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:36,876 INFO L93 Difference]: Finished difference Result 8369 states and 13490 transitions. [2022-11-20 19:48:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:48:36,877 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 [2022-11-20 19:48:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:36,931 INFO L225 Difference]: With dead ends: 8369 [2022-11-20 19:48:36,932 INFO L226 Difference]: Without dead ends: 5178 [2022-11-20 19:48:36,955 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 [2022-11-20 19:48:36,957 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 [2022-11-20 19:48:36,957 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] [2022-11-20 19:48:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5178 states. [2022-11-20 19:48:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5178 to 4236. [2022-11-20 19:48:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4236 states, 2868 states have (on average 1.4853556485355648) internal successors, (4260), 3118 states have internal predecessors, (4260), 1121 states have call successors, (1121), 238 states have call predecessors, (1121), 246 states have return successors, (1312), 1033 states have call predecessors, (1312), 1115 states have call successors, (1312) [2022-11-20 19:48:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4236 states to 4236 states and 6693 transitions. [2022-11-20 19:48:37,447 INFO L78 Accepts]: Start accepts. Automaton has 4236 states and 6693 transitions. Word has length 99 [2022-11-20 19:48:37,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:37,447 INFO L495 AbstractCegarLoop]: Abstraction has 4236 states and 6693 transitions. [2022-11-20 19:48:37,448 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) [2022-11-20 19:48:37,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4236 states and 6693 transitions. [2022-11-20 19:48:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-20 19:48:37,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:37,455 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] [2022-11-20 19:48:37,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:37,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:37,664 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash 247143736, now seen corresponding path program 1 times [2022-11-20 19:48:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:37,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137188480] [2022-11-20 19:48:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:37,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 19:48:38,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:38,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137188480] [2022-11-20 19:48:38,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137188480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:38,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88396625] [2022-11-20 19:48:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:38,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:38,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:38,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:38,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 19:48:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:48:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 19:48:39,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:48:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 19:48:39,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88396625] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:39,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:48:39,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-20 19:48:39,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957141626] [2022-11-20 19:48:39,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:39,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 19:48:39,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:39,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 19:48:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:48:39,594 INFO L87 Difference]: Start difference. First operand 4236 states and 6693 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) [2022-11-20 19:48:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:44,454 INFO L93 Difference]: Finished difference Result 11586 states and 19264 transitions. [2022-11-20 19:48:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 19:48:44,455 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 [2022-11-20 19:48:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:44,512 INFO L225 Difference]: With dead ends: 11586 [2022-11-20 19:48:44,512 INFO L226 Difference]: Without dead ends: 8537 [2022-11-20 19:48:44,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 19:48:44,537 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 1924 mSDsluCounter, 2768 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 3474 SdHoareTripleChecker+Invalid, 3803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:44,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 3474 Invalid, 3803 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [859 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 19:48:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8537 states. [2022-11-20 19:48:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8537 to 7336. [2022-11-20 19:48:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7336 states, 5182 states have (on average 1.489193361636434) internal successors, (7717), 5472 states have internal predecessors, (7717), 1647 states have call successors, (1647), 468 states have call predecessors, (1647), 506 states have return successors, (2376), 1539 states have call predecessors, (2376), 1639 states have call successors, (2376) [2022-11-20 19:48:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7336 states to 7336 states and 11740 transitions. [2022-11-20 19:48:45,474 INFO L78 Accepts]: Start accepts. Automaton has 7336 states and 11740 transitions. Word has length 103 [2022-11-20 19:48:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:45,475 INFO L495 AbstractCegarLoop]: Abstraction has 7336 states and 11740 transitions. [2022-11-20 19:48:45,475 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) [2022-11-20 19:48:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 7336 states and 11740 transitions. [2022-11-20 19:48:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-20 19:48:45,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:45,480 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] [2022-11-20 19:48:45,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:45,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:45,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:45,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:45,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1963665248, now seen corresponding path program 1 times [2022-11-20 19:48:45,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:45,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457116559] [2022-11-20 19:48:45,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:45,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 19:48:46,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:46,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457116559] [2022-11-20 19:48:46,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457116559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:46,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522583592] [2022-11-20 19:48:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:46,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:46,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:46,443 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:46,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:48:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:46,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:48:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 19:48:47,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:48:47,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522583592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:47,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:48:47,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-20 19:48:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127177863] [2022-11-20 19:48:47,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:47,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:48:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:47,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:48:47,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:48:47,030 INFO L87 Difference]: Start difference. First operand 7336 states and 11740 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) [2022-11-20 19:48:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:48,180 INFO L93 Difference]: Finished difference Result 13499 states and 21652 transitions. [2022-11-20 19:48:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:48:48,181 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 [2022-11-20 19:48:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:48,237 INFO L225 Difference]: With dead ends: 13499 [2022-11-20 19:48:48,237 INFO L226 Difference]: Without dead ends: 7358 [2022-11-20 19:48:48,276 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 [2022-11-20 19:48:48,277 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 417 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:48,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 2579 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 19:48:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7358 states. [2022-11-20 19:48:48,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7358 to 7336. [2022-11-20 19:48:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7336 states, 5182 states have (on average 1.489193361636434) internal successors, (7717), 5472 states have internal predecessors, (7717), 1647 states have call successors, (1647), 468 states have call predecessors, (1647), 506 states have return successors, (2368), 1539 states have call predecessors, (2368), 1639 states have call successors, (2368) [2022-11-20 19:48:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7336 states to 7336 states and 11732 transitions. [2022-11-20 19:48:49,083 INFO L78 Accepts]: Start accepts. Automaton has 7336 states and 11732 transitions. Word has length 107 [2022-11-20 19:48:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:49,083 INFO L495 AbstractCegarLoop]: Abstraction has 7336 states and 11732 transitions. [2022-11-20 19:48:49,084 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) [2022-11-20 19:48:49,084 INFO L276 IsEmpty]: Start isEmpty. Operand 7336 states and 11732 transitions. [2022-11-20 19:48:49,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-20 19:48:49,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:49,099 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] [2022-11-20 19:48:49,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:49,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 19:48:49,308 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:49,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:49,308 INFO L85 PathProgramCache]: Analyzing trace with hash 866008532, now seen corresponding path program 1 times [2022-11-20 19:48:49,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:49,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623614464] [2022-11-20 19:48:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:49,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 19:48:50,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:50,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623614464] [2022-11-20 19:48:50,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623614464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:50,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488865696] [2022-11-20 19:48:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:50,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:50,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:50,217 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:50,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 19:48:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:50,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 19:48:50,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 19:48:51,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:48:51,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488865696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:51,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:48:51,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-20 19:48:51,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504466052] [2022-11-20 19:48:51,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:51,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:48:51,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:51,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:48:51,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-20 19:48:51,019 INFO L87 Difference]: Start difference. First operand 7336 states and 11732 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) [2022-11-20 19:48:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:54,161 INFO L93 Difference]: Finished difference Result 24998 states and 42985 transitions. [2022-11-20 19:48:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:48:54,161 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 [2022-11-20 19:48:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:54,416 INFO L225 Difference]: With dead ends: 24998 [2022-11-20 19:48:54,416 INFO L226 Difference]: Without dead ends: 17674 [2022-11-20 19:48:54,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:48:54,484 INFO L413 NwaCegarLoop]: 982 mSDtfsCounter, 791 mSDsluCounter, 3285 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 4267 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:54,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 4267 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 19:48:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17674 states. [2022-11-20 19:48:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17674 to 14582. [2022-11-20 19:48:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14582 states, 10332 states have (on average 1.485191637630662) internal successors, (15345), 10924 states have internal predecessors, (15345), 3283 states have call successors, (3283), 887 states have call predecessors, (3283), 966 states have return successors, (5481), 3016 states have call predecessors, (5481), 3271 states have call successors, (5481) [2022-11-20 19:48:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14582 states to 14582 states and 24109 transitions. [2022-11-20 19:48:56,391 INFO L78 Accepts]: Start accepts. Automaton has 14582 states and 24109 transitions. Word has length 134 [2022-11-20 19:48:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:56,392 INFO L495 AbstractCegarLoop]: Abstraction has 14582 states and 24109 transitions. [2022-11-20 19:48:56,392 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) [2022-11-20 19:48:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 14582 states and 24109 transitions. [2022-11-20 19:48:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-20 19:48:56,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:56,399 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] [2022-11-20 19:48:56,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:56,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 19:48:56,608 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:56,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1883580168, now seen corresponding path program 1 times [2022-11-20 19:48:56,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:56,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942024918] [2022-11-20 19:48:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:56,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 19:48:57,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:57,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942024918] [2022-11-20 19:48:57,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942024918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:57,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:57,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 19:48:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14820595] [2022-11-20 19:48:57,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:57,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 19:48:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 19:48:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:48:57,608 INFO L87 Difference]: Start difference. First operand 14582 states and 24109 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) [2022-11-20 19:49:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:49:09,470 INFO L93 Difference]: Finished difference Result 55102 states and 95330 transitions. [2022-11-20 19:49:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 19:49:09,470 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 [2022-11-20 19:49:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:49:09,968 INFO L225 Difference]: With dead ends: 55102 [2022-11-20 19:49:09,968 INFO L226 Difference]: Without dead ends: 40532 [2022-11-20 19:49:10,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 19:49:10,087 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 3291 mSDsluCounter, 3714 mSDsCounter, 0 mSdLazyCounter, 8221 mSolverCounterSat, 1481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3394 SdHoareTripleChecker+Valid, 4238 SdHoareTripleChecker+Invalid, 9702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1481 IncrementalHoareTripleChecker+Valid, 8221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:49:10,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3394 Valid, 4238 Invalid, 9702 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1481 Valid, 8221 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-20 19:49:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40532 states. [2022-11-20 19:49:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40532 to 35037. [2022-11-20 19:49:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35037 states, 25848 states have (on average 1.489051377282575) internal successors, (38489), 26800 states have internal predecessors, (38489), 6460 states have call successors, (6460), 2463 states have call predecessors, (6460), 2728 states have return successors, (10627), 6199 states have call predecessors, (10627), 6440 states have call successors, (10627) [2022-11-20 19:49:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35037 states to 35037 states and 55576 transitions. [2022-11-20 19:49:14,772 INFO L78 Accepts]: Start accepts. Automaton has 35037 states and 55576 transitions. Word has length 140 [2022-11-20 19:49:14,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:49:14,773 INFO L495 AbstractCegarLoop]: Abstraction has 35037 states and 55576 transitions. [2022-11-20 19:49:14,773 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) [2022-11-20 19:49:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 35037 states and 55576 transitions. [2022-11-20 19:49:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-20 19:49:14,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:14,787 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] [2022-11-20 19:49:14,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 19:49:14,787 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:49:14,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash 77619140, now seen corresponding path program 1 times [2022-11-20 19:49:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:14,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528495813] [2022-11-20 19:49:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-20 19:49:14,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:14,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528495813] [2022-11-20 19:49:14,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528495813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:49:14,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:49:14,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:49:14,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404097161] [2022-11-20 19:49:14,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:49:14,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:49:14,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:49:14,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:49:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:49:14,959 INFO L87 Difference]: Start difference. First operand 35037 states and 55576 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) [2022-11-20 19:49:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:49:20,076 INFO L93 Difference]: Finished difference Result 81862 states and 131642 transitions. [2022-11-20 19:49:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:49:20,076 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 [2022-11-20 19:49:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:49:20,635 INFO L225 Difference]: With dead ends: 81862 [2022-11-20 19:49:20,636 INFO L226 Difference]: Without dead ends: 46837 [2022-11-20 19:49:20,905 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 [2022-11-20 19:49:20,906 INFO L413 NwaCegarLoop]: 804 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, 1380 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 [2022-11-20 19:49:20,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1380 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:49:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46837 states. [2022-11-20 19:49:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46837 to 46468. [2022-11-20 19:49:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 34331 states have (on average 1.489149748041129) internal successors, (51124), 35609 states have internal predecessors, (51124), 8512 states have call successors, (8512), 3253 states have call predecessors, (8512), 3624 states have return successors, (14110), 8175 states have call predecessors, (14110), 8492 states have call successors, (14110) [2022-11-20 19:49:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 73746 transitions. [2022-11-20 19:49:26,255 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 73746 transitions. Word has length 172 [2022-11-20 19:49:26,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:49:26,256 INFO L495 AbstractCegarLoop]: Abstraction has 46468 states and 73746 transitions. [2022-11-20 19:49:26,256 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) [2022-11-20 19:49:26,256 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 73746 transitions. [2022-11-20 19:49:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-20 19:49:26,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:26,272 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] [2022-11-20 19:49:26,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 19:49:26,273 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:49:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1220432249, now seen corresponding path program 1 times [2022-11-20 19:49:26,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:26,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526737791] [2022-11-20 19:49:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:26,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-20 19:49:27,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:27,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526737791] [2022-11-20 19:49:27,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526737791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:49:27,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779051379] [2022-11-20 19:49:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:27,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:27,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:49:27,140 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:49:27,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814fcf84-c6ad-4367-baa4-943ea0396c0f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 19:49:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:27,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:49:27,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:49:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 19:49:27,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:49:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-20 19:49:28,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779051379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:49:28,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376751786] [2022-11-20 19:49:28,229 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-11-20 19:49:28,229 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:49:28,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:49:28,241 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:49:28,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:49:37,930 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2022-11-20 19:49:46,075 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-11-20 19:49:46,078 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-20 19:49:46,314 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 33 for LOIs [2022-11-20 19:49:46,348 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 597 for LOIs [2022-11-20 19:49:48,672 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 571 for LOIs [2022-11-20 19:49:48,871 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 33 for LOIs [2022-11-20 19:49:48,873 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 33 for LOIs [2022-11-20 19:49:49,014 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 57 for LOIs [2022-11-20 19:49:49,041 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 50 for LOIs [2022-11-20 19:49:49,062 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 43 for LOIs [2022-11-20 19:49:49,079 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 54 for LOIs [2022-11-20 19:49:49,094 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 571 for LOIs [2022-11-20 19:49:52,629 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 575 for LOIs [2022-11-20 19:49:53,285 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 503 for LOIs [2022-11-20 19:49:53,430 INFO L180 IcfgInterpreter]: Interpretation finished