./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur --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 a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 --- 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-38b53e6 [2022-11-25 22:23:16,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:23:16,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:23:16,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:23:16,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:23:16,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:23:16,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:23:16,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:23:16,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:23:16,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:23:16,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:23:16,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:23:16,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:23:16,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:23:16,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:23:16,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:23:16,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:23:16,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:23:16,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:23:16,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:23:16,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:23:16,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:23:16,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:23:16,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:23:16,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:23:16,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:23:16,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:23:16,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:23:16,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:23:16,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:23:16,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:23:16,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:23:16,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:23:16,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:23:16,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:23:16,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:23:16,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:23:16,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:23:16,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:23:16,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:23:16,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:23:16,173 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:23:16,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:23:16,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:23:16,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:23:16,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:23:16,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:23:16,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:23:16,213 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:23:16,213 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:23:16,213 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:23:16,213 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:23:16,213 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:23:16,214 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:23:16,214 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:23:16,214 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:23:16,214 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:23:16,214 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:23:16,215 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:23:16,215 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:23:16,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:23:16,216 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:23:16,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:23:16,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:23:16,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:23:16,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:23:16,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:23:16,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:23:16,217 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:23:16,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:23:16,217 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:23:16,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:23:16,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:23:16,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:23:16,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:23:16,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:23:16,219 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:23:16,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:23:16,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:23:16,219 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:23:16,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:23:16,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:23:16,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:23:16,220 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_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 [2022-11-25 22:23:16,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:23:16,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:23:16,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:23:16,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:23:16,580 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:23:16,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2022-11-25 22:23:19,562 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:23:19,970 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:23:19,989 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2022-11-25 22:23:20,013 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/data/a8beed243/75071cf0080542f29b59facc1a4f3f3c/FLAGd30a264cb [2022-11-25 22:23:20,029 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/data/a8beed243/75071cf0080542f29b59facc1a4f3f3c [2022-11-25 22:23:20,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:23:20,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:23:20,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:23:20,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:23:20,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:23:20,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:20,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@793cfbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20, skipping insertion in model container [2022-11-25 22:23:20,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:20,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:23:20,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:23:20,406 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_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-11-25 22:23:20,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:23:20,693 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:23:20,753 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_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-11-25 22:23:20,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:23:20,900 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:23:20,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20 WrapperNode [2022-11-25 22:23:20,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:23:20,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:23:20,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:23:20,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:23:20,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:20,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:20,996 INFO L138 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 905 [2022-11-25 22:23:20,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:23:20,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:23:20,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:23:20,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:23:21,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:21,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:21,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:21,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:21,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:21,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:21,093 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:21,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:21,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:23:21,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:23:21,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:23:21,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:23:21,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (1/1) ... [2022-11-25 22:23:21,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:23:21,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:21,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:23:21,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:23:21,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:23:21,218 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-25 22:23:21,218 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-25 22:23:21,218 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-25 22:23:21,218 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-25 22:23:21,218 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-25 22:23:21,218 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-25 22:23:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-25 22:23:21,219 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-25 22:23:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-25 22:23:21,219 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-25 22:23:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-25 22:23:21,220 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-25 22:23:21,220 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 22:23:21,220 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 22:23:21,220 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 22:23:21,220 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 22:23:21,220 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-25 22:23:21,221 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-25 22:23:21,221 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-25 22:23:21,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-25 22:23:21,221 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-25 22:23:21,222 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-25 22:23:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-25 22:23:21,223 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-25 22:23:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-25 22:23:21,224 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-25 22:23:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-25 22:23:21,224 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-25 22:23:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-25 22:23:21,225 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-25 22:23:21,225 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-25 22:23:21,225 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-25 22:23:21,225 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-25 22:23:21,225 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-25 22:23:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-25 22:23:21,226 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-25 22:23:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-25 22:23:21,226 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-25 22:23:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:23:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-25 22:23:21,227 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-25 22:23:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-25 22:23:21,227 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-25 22:23:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-25 22:23:21,228 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-25 22:23:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-25 22:23:21,229 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-25 22:23:21,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:23:21,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:23:21,230 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-25 22:23:21,230 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-25 22:23:21,384 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:23:21,386 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:23:22,713 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:23:23,604 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:23:23,605 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 22:23:23,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:23:23 BoogieIcfgContainer [2022-11-25 22:23:23,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:23:23,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:23:23,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:23:23,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:23:23,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:23:20" (1/3) ... [2022-11-25 22:23:23,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713efd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:23:23, skipping insertion in model container [2022-11-25 22:23:23,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:23:20" (2/3) ... [2022-11-25 22:23:23,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713efd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:23:23, skipping insertion in model container [2022-11-25 22:23:23,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:23:23" (3/3) ... [2022-11-25 22:23:23,623 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product29.cil.c [2022-11-25 22:23:23,644 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:23:23,644 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:23:23,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:23:23,736 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;@6f7a1bd4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:23:23,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:23:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-25 22:23:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 22:23:23,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:23,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:23,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash -847922989, now seen corresponding path program 1 times [2022-11-25 22:23:23,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:23,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984409653] [2022-11-25 22:23:23,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:23,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:23:24,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:24,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984409653] [2022-11-25 22:23:24,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984409653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:24,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:23:24,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:23:24,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613130003] [2022-11-25 22:23:24,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:24,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:23:24,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:24,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:23:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:23:24,723 INFO L87 Difference]: Start difference. First operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 22:23:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:25,356 INFO L93 Difference]: Finished difference Result 844 states and 1368 transitions. [2022-11-25 22:23:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:23:25,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 65 [2022-11-25 22:23:25,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:25,375 INFO L225 Difference]: With dead ends: 844 [2022-11-25 22:23:25,375 INFO L226 Difference]: Without dead ends: 483 [2022-11-25 22:23:25,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:23:25,385 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 282 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:25,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2315 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:23:25,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-25 22:23:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 373. [2022-11-25 22:23:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 254 states have (on average 1.578740157480315) internal successors, (401), 273 states have internal predecessors, (401), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-25 22:23:25,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 586 transitions. [2022-11-25 22:23:25,499 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 586 transitions. Word has length 65 [2022-11-25 22:23:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:25,501 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 586 transitions. [2022-11-25 22:23:25,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 22:23:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 586 transitions. [2022-11-25 22:23:25,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 22:23:25,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:25,515 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:23:25,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:23:25,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:25,517 INFO L85 PathProgramCache]: Analyzing trace with hash 249604261, now seen corresponding path program 1 times [2022-11-25 22:23:25,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:25,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165886421] [2022-11-25 22:23:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:25,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:23:26,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:26,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165886421] [2022-11-25 22:23:26,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165886421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:26,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:23:26,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 22:23:26,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60968813] [2022-11-25 22:23:26,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:26,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:23:26,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:26,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:23:26,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:23:26,097 INFO L87 Difference]: Start difference. First operand 373 states and 586 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-25 22:23:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:29,653 INFO L93 Difference]: Finished difference Result 1280 states and 2045 transitions. [2022-11-25 22:23:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:23:29,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 68 [2022-11-25 22:23:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:29,676 INFO L225 Difference]: With dead ends: 1280 [2022-11-25 22:23:29,677 INFO L226 Difference]: Without dead ends: 923 [2022-11-25 22:23:29,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-25 22:23:29,687 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1733 mSDsluCounter, 2128 mSDsCounter, 0 mSdLazyCounter, 3931 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 4515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 3931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:29,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1798 Valid, 2525 Invalid, 4515 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [584 Valid, 3931 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-25 22:23:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-11-25 22:23:29,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 867. [2022-11-25 22:23:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 611 states have (on average 1.5973813420621932) internal successors, (976), 642 states have internal predecessors, (976), 203 states have call successors, (203), 48 states have call predecessors, (203), 52 states have return successors, (210), 201 states have call predecessors, (210), 198 states have call successors, (210) [2022-11-25 22:23:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1389 transitions. [2022-11-25 22:23:29,806 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1389 transitions. Word has length 68 [2022-11-25 22:23:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:29,807 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1389 transitions. [2022-11-25 22:23:29,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-25 22:23:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1389 transitions. [2022-11-25 22:23:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 22:23:29,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:29,813 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:29,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:23:29,813 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:29,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:29,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1662862818, now seen corresponding path program 1 times [2022-11-25 22:23:29,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:29,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146239341] [2022-11-25 22:23:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:29,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:23:31,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:31,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146239341] [2022-11-25 22:23:31,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146239341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:31,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:23:31,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:23:31,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083045294] [2022-11-25 22:23:31,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:31,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:23:31,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:31,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:23:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:23:31,182 INFO L87 Difference]: Start difference. First operand 867 states and 1389 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 22:23:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:35,777 INFO L93 Difference]: Finished difference Result 3774 states and 6176 transitions. [2022-11-25 22:23:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 22:23:35,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2022-11-25 22:23:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:35,806 INFO L225 Difference]: With dead ends: 3774 [2022-11-25 22:23:35,806 INFO L226 Difference]: Without dead ends: 2924 [2022-11-25 22:23:35,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:23:35,815 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 2602 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 1174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2709 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 4056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1174 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:35,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2709 Valid, 1643 Invalid, 4056 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1174 Valid, 2882 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-25 22:23:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2022-11-25 22:23:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2652. [2022-11-25 22:23:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 1862 states have (on average 1.5918367346938775) internal successors, (2964), 1975 states have internal predecessors, (2964), 645 states have call successors, (645), 128 states have call predecessors, (645), 144 states have return successors, (696), 619 states have call predecessors, (696), 640 states have call successors, (696) [2022-11-25 22:23:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 4305 transitions. [2022-11-25 22:23:36,137 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 4305 transitions. Word has length 73 [2022-11-25 22:23:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:36,139 INFO L495 AbstractCegarLoop]: Abstraction has 2652 states and 4305 transitions. [2022-11-25 22:23:36,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 22:23:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 4305 transitions. [2022-11-25 22:23:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:23:36,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:36,144 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:23:36,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:23:36,144 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2120546044, now seen corresponding path program 1 times [2022-11-25 22:23:36,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:36,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188896871] [2022-11-25 22:23:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:36,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:23:36,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:36,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188896871] [2022-11-25 22:23:36,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188896871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:36,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:23:36,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:23:36,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630991781] [2022-11-25 22:23:36,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:36,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:23:36,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:23:36,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:23:36,503 INFO L87 Difference]: Start difference. First operand 2652 states and 4305 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 22:23:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:36,956 INFO L93 Difference]: Finished difference Result 4528 states and 7355 transitions. [2022-11-25 22:23:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:23:36,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2022-11-25 22:23:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:36,975 INFO L225 Difference]: With dead ends: 4528 [2022-11-25 22:23:36,978 INFO L226 Difference]: Without dead ends: 2919 [2022-11-25 22:23:36,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:23:36,994 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 42 mSDsluCounter, 2886 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:36,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3479 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:23:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2022-11-25 22:23:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2725. [2022-11-25 22:23:37,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 1913 states have (on average 1.5760585467851542) internal successors, (3015), 2028 states have internal predecessors, (3015), 645 states have call successors, (645), 128 states have call predecessors, (645), 166 states have return successors, (743), 639 states have call predecessors, (743), 640 states have call successors, (743) [2022-11-25 22:23:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 4403 transitions. [2022-11-25 22:23:37,292 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 4403 transitions. Word has length 72 [2022-11-25 22:23:37,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:37,293 INFO L495 AbstractCegarLoop]: Abstraction has 2725 states and 4403 transitions. [2022-11-25 22:23:37,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 22:23:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 4403 transitions. [2022-11-25 22:23:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 22:23:37,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:37,295 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:37,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:23:37,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:37,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash 460163070, now seen corresponding path program 1 times [2022-11-25 22:23:37,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:37,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342492232] [2022-11-25 22:23:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:37,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:23:37,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:37,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342492232] [2022-11-25 22:23:37,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342492232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:37,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:23:37,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:23:37,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024652] [2022-11-25 22:23:37,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:37,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:23:37,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:37,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:23:37,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:23:37,612 INFO L87 Difference]: Start difference. First operand 2725 states and 4403 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 22:23:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:38,090 INFO L93 Difference]: Finished difference Result 4626 states and 7478 transitions. [2022-11-25 22:23:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:23:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-25 22:23:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:38,108 INFO L225 Difference]: With dead ends: 4626 [2022-11-25 22:23:38,108 INFO L226 Difference]: Without dead ends: 2970 [2022-11-25 22:23:38,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:23:38,116 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 41 mSDsluCounter, 2901 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3498 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:38,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3498 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:23:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2022-11-25 22:23:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2736. [2022-11-25 22:23:38,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1924 states have (on average 1.5727650727650728) internal successors, (3026), 2028 states have internal predecessors, (3026), 645 states have call successors, (645), 128 states have call predecessors, (645), 166 states have return successors, (743), 650 states have call predecessors, (743), 640 states have call successors, (743) [2022-11-25 22:23:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4414 transitions. [2022-11-25 22:23:38,407 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4414 transitions. Word has length 73 [2022-11-25 22:23:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:38,408 INFO L495 AbstractCegarLoop]: Abstraction has 2736 states and 4414 transitions. [2022-11-25 22:23:38,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 22:23:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4414 transitions. [2022-11-25 22:23:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-25 22:23:38,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:38,411 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:23:38,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:23:38,411 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:38,412 INFO L85 PathProgramCache]: Analyzing trace with hash -407194107, now seen corresponding path program 1 times [2022-11-25 22:23:38,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:38,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363865912] [2022-11-25 22:23:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:38,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:23:38,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:38,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363865912] [2022-11-25 22:23:38,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363865912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:38,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:23:38,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:23:38,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001280650] [2022-11-25 22:23:38,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:38,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:23:38,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:38,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:23:38,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:23:38,795 INFO L87 Difference]: Start difference. First operand 2736 states and 4414 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-25 22:23:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:41,802 INFO L93 Difference]: Finished difference Result 6186 states and 10031 transitions. [2022-11-25 22:23:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:23:41,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 79 [2022-11-25 22:23:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:41,832 INFO L225 Difference]: With dead ends: 6186 [2022-11-25 22:23:41,832 INFO L226 Difference]: Without dead ends: 4163 [2022-11-25 22:23:41,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:23:41,846 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 1945 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 2711 mSolverCounterSat, 812 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2109 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 3523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 812 IncrementalHoareTripleChecker+Valid, 2711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:41,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2109 Valid, 1440 Invalid, 3523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [812 Valid, 2711 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 22:23:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2022-11-25 22:23:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 3987. [2022-11-25 22:23:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3987 states, 2754 states have (on average 1.532316630355846) internal successors, (4220), 2918 states have internal predecessors, (4220), 970 states have call successors, (970), 210 states have call predecessors, (970), 262 states have return successors, (1138), 964 states have call predecessors, (1138), 965 states have call successors, (1138) [2022-11-25 22:23:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 6328 transitions. [2022-11-25 22:23:42,391 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 6328 transitions. Word has length 79 [2022-11-25 22:23:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:42,392 INFO L495 AbstractCegarLoop]: Abstraction has 3987 states and 6328 transitions. [2022-11-25 22:23:42,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-25 22:23:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 6328 transitions. [2022-11-25 22:23:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 22:23:42,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:42,394 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:23:42,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:23:42,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash -403940076, now seen corresponding path program 1 times [2022-11-25 22:23:42,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:42,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220711786] [2022-11-25 22:23:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:23:42,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:42,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220711786] [2022-11-25 22:23:42,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220711786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:42,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:23:42,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:23:42,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879721872] [2022-11-25 22:23:42,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:42,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:23:42,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:42,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:23:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:23:42,716 INFO L87 Difference]: Start difference. First operand 3987 states and 6328 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-25 22:23:45,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:45,322 INFO L93 Difference]: Finished difference Result 7540 states and 12021 transitions. [2022-11-25 22:23:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:23:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2022-11-25 22:23:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:45,355 INFO L225 Difference]: With dead ends: 7540 [2022-11-25 22:23:45,355 INFO L226 Difference]: Without dead ends: 4493 [2022-11-25 22:23:45,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:23:45,371 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 991 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:45,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 1610 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 22:23:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2022-11-25 22:23:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 4068. [2022-11-25 22:23:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4068 states, 2808 states have (on average 1.5263532763532763) internal successors, (4286), 2984 states have internal predecessors, (4286), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2022-11-25 22:23:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 6431 transitions. [2022-11-25 22:23:45,887 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 6431 transitions. Word has length 82 [2022-11-25 22:23:45,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:45,887 INFO L495 AbstractCegarLoop]: Abstraction has 4068 states and 6431 transitions. [2022-11-25 22:23:45,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-25 22:23:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 6431 transitions. [2022-11-25 22:23:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 22:23:45,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:45,891 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:23:45,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:23:45,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:45,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1278460408, now seen corresponding path program 1 times [2022-11-25 22:23:45,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:45,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325510022] [2022-11-25 22:23:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:45,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:23:46,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:46,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325510022] [2022-11-25 22:23:46,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325510022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:46,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:23:46,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:23:46,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236239257] [2022-11-25 22:23:46,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:46,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:23:46,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:46,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:23:46,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:23:46,120 INFO L87 Difference]: Start difference. First operand 4068 states and 6431 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:23:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:47,034 INFO L93 Difference]: Finished difference Result 4172 states and 6593 transitions. [2022-11-25 22:23:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:23:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2022-11-25 22:23:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:47,060 INFO L225 Difference]: With dead ends: 4172 [2022-11-25 22:23:47,061 INFO L226 Difference]: Without dead ends: 4157 [2022-11-25 22:23:47,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:23:47,065 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 677 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:47,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1808 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:23:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2022-11-25 22:23:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 4074. [2022-11-25 22:23:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4074 states, 2814 states have (on average 1.5252309879175552) internal successors, (4292), 2990 states have internal predecessors, (4292), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2022-11-25 22:23:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6437 transitions. [2022-11-25 22:23:47,540 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6437 transitions. Word has length 86 [2022-11-25 22:23:47,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:47,540 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 6437 transitions. [2022-11-25 22:23:47,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:23:47,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6437 transitions. [2022-11-25 22:23:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-25 22:23:47,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:47,543 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:23:47,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:23:47,544 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1192687189, now seen corresponding path program 1 times [2022-11-25 22:23:47,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:47,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105851576] [2022-11-25 22:23:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:47,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 22:23:48,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:48,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105851576] [2022-11-25 22:23:48,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105851576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:48,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238771550] [2022-11-25 22:23:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:48,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:48,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:48,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:48,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:23:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:48,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:23:48,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:23:49,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:23:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238771550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:49,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:23:49,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-25 22:23:49,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960640080] [2022-11-25 22:23:49,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:49,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:23:49,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:49,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:23:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:23:49,058 INFO L87 Difference]: Start difference. First operand 4074 states and 6437 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-25 22:23:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:49,735 INFO L93 Difference]: Finished difference Result 4095 states and 6464 transitions. [2022-11-25 22:23:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:23:49,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 91 [2022-11-25 22:23:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:49,761 INFO L225 Difference]: With dead ends: 4095 [2022-11-25 22:23:49,761 INFO L226 Difference]: Without dead ends: 4080 [2022-11-25 22:23:49,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:23:49,765 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 30 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:49,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2158 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:23:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2022-11-25 22:23:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 4074. [2022-11-25 22:23:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4074 states, 2814 states have (on average 1.5223880597014925) internal successors, (4284), 2990 states have internal predecessors, (4284), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2022-11-25 22:23:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6429 transitions. [2022-11-25 22:23:50,231 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6429 transitions. Word has length 91 [2022-11-25 22:23:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:50,233 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 6429 transitions. [2022-11-25 22:23:50,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-25 22:23:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6429 transitions. [2022-11-25 22:23:50,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-25 22:23:50,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:50,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:50,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:23:50,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:50,445 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:50,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1661371554, now seen corresponding path program 1 times [2022-11-25 22:23:50,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:50,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292944951] [2022-11-25 22:23:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:50,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:23:52,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292944951] [2022-11-25 22:23:52,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292944951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:52,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585387000] [2022-11-25 22:23:52,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:52,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:52,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:52,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:52,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:23:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:52,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 22:23:52,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:23:53,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:23:53,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585387000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:53,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:23:53,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [24] total 29 [2022-11-25 22:23:53,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790067046] [2022-11-25 22:23:53,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:53,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:23:53,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:53,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:23:53,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:23:53,445 INFO L87 Difference]: Start difference. First operand 4074 states and 6429 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-25 22:23:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:55,772 INFO L93 Difference]: Finished difference Result 9411 states and 14818 transitions. [2022-11-25 22:23:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:23:55,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 98 [2022-11-25 22:23:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:55,804 INFO L225 Difference]: With dead ends: 9411 [2022-11-25 22:23:55,804 INFO L226 Difference]: Without dead ends: 5353 [2022-11-25 22:23:55,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:23:55,825 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 850 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:55,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 1437 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 22:23:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2022-11-25 22:23:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 5302. [2022-11-25 22:23:56,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5302 states, 3692 states have (on average 1.5159804983748646) internal successors, (5597), 3896 states have internal predecessors, (5597), 1235 states have call successors, (1235), 298 states have call predecessors, (1235), 374 states have return successors, (1487), 1214 states have call predecessors, (1487), 1230 states have call successors, (1487) [2022-11-25 22:23:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5302 states to 5302 states and 8319 transitions. [2022-11-25 22:23:56,453 INFO L78 Accepts]: Start accepts. Automaton has 5302 states and 8319 transitions. Word has length 98 [2022-11-25 22:23:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:56,454 INFO L495 AbstractCegarLoop]: Abstraction has 5302 states and 8319 transitions. [2022-11-25 22:23:56,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-25 22:23:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5302 states and 8319 transitions. [2022-11-25 22:23:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-25 22:23:56,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:56,458 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:56,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 22:23:56,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:23:56,670 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:56,671 INFO L85 PathProgramCache]: Analyzing trace with hash -179589231, now seen corresponding path program 1 times [2022-11-25 22:23:56,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:56,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055002852] [2022-11-25 22:23:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:56,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:23:57,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055002852] [2022-11-25 22:23:57,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055002852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231914230] [2022-11-25 22:23:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:57,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:57,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:57,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:57,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:23:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:57,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 22:23:57,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:23:59,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:24:02,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231914230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:02,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1590494705] [2022-11-25 22:24:02,683 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2022-11-25 22:24:02,683 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:02,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:02,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:02,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:08,427 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-11-25 22:25:26,491 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 588 for LOIs [2022-11-25 22:25:34,248 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 114 for LOIs [2022-11-25 22:25:34,876 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-11-25 22:25:34,909 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 128 for LOIs [2022-11-25 22:25:35,540 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 35 for LOIs [2022-11-25 22:25:35,549 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 82 for LOIs [2022-11-25 22:25:35,558 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-11-25 22:25:38,986 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-25 22:25:39,549 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 453 for LOIs [2022-11-25 22:25:39,811 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 107 for LOIs [2022-11-25 22:25:40,199 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 105 for LOIs [2022-11-25 22:25:40,220 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-25 22:25:40,365 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:03,157 WARN L233 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:26:10,838 WARN L233 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:26:20,025 WARN L233 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:11,978 WARN L233 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 541 DAG size of output: 475 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:18,390 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 543 DAG size of output: 477 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:24,810 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 546 DAG size of output: 480 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:42,157 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 555 DAG size of output: 483 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:48,769 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 555 DAG size of output: 482 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:56,440 WARN L233 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 558 DAG size of output: 503 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:03,640 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 561 DAG size of output: 494 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:10,862 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 567 DAG size of output: 500 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:18,443 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 583 DAG size of output: 510 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:18,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1590494705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:18,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:18,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [11, 12, 12] total 94 [2022-11-25 22:28:18,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397863038] [2022-11-25 22:28:18,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:18,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-25 22:28:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-25 22:28:18,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=8046, Unknown=0, NotChecked=0, Total=8742 [2022-11-25 22:28:18,452 INFO L87 Difference]: Start difference. First operand 5302 states and 8319 transitions. Second operand has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 22:28:25,252 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:31,914 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:38,366 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 602 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:44,208 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 614 DAG size of output: 603 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:51,047 WARN L233 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 656 DAG size of output: 620 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:57,884 WARN L233 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 652 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:29:04,391 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 635 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:29:10,964 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 641 DAG size of output: 608 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:29:18,235 WARN L233 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 671 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:29:25,235 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 658 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:29:32,329 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 662 DAG size of output: 626 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:29:39,528 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 664 DAG size of output: 628 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:05,047 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 536 DAG size of output: 526 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:10,374 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 538 DAG size of output: 528 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:15,744 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 541 DAG size of output: 531 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:30,339 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 545 DAG size of output: 533 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:35,940 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 542 DAG size of output: 534 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:51,610 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 566 DAG size of output: 552 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:57,616 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 557 DAG size of output: 543 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:31:03,589 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 563 DAG size of output: 549 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:31:09,910 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 573 DAG size of output: 559 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:31:47,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:47,264 INFO L93 Difference]: Finished difference Result 11426 states and 17902 transitions. [2022-11-25 22:31:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-25 22:31:47,265 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 99 [2022-11-25 22:31:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:47,299 INFO L225 Difference]: With dead ends: 11426 [2022-11-25 22:31:47,299 INFO L226 Difference]: Without dead ends: 6124 [2022-11-25 22:31:47,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 211 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5573 ImplicationChecksByTransitivity, 307.5s TimeCoverageRelationStatistics Valid=1093, Invalid=13913, Unknown=0, NotChecked=0, Total=15006 [2022-11-25 22:31:47,327 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 768 mSDsluCounter, 7331 mSDsCounter, 0 mSdLazyCounter, 16473 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 7865 SdHoareTripleChecker+Invalid, 16668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 16473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:47,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 7865 Invalid, 16668 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [195 Valid, 16473 Invalid, 0 Unknown, 0 Unchecked, 58.6s Time] [2022-11-25 22:31:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2022-11-25 22:31:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5889. [2022-11-25 22:31:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 4144 states have (on average 1.5060328185328185) internal successors, (6241), 4349 states have internal predecessors, (6241), 1324 states have call successors, (1324), 335 states have call predecessors, (1324), 420 states have return successors, (1601), 1311 states have call predecessors, (1601), 1319 states have call successors, (1601) [2022-11-25 22:31:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9166 transitions. [2022-11-25 22:31:48,432 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9166 transitions. Word has length 99 [2022-11-25 22:31:48,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:48,432 INFO L495 AbstractCegarLoop]: Abstraction has 5889 states and 9166 transitions. [2022-11-25 22:31:48,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 22:31:48,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9166 transitions. [2022-11-25 22:31:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-25 22:31:48,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:48,437 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:31:48,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:48,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:48,645 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1798907305, now seen corresponding path program 1 times [2022-11-25 22:31:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:48,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10125539] [2022-11-25 22:31:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:31:48,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:48,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10125539] [2022-11-25 22:31:48,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10125539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:48,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:31:48,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:31:48,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696239852] [2022-11-25 22:31:48,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:48,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:31:48,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:31:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:48,886 INFO L87 Difference]: Start difference. First operand 5889 states and 9166 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-25 22:31:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:50,304 INFO L93 Difference]: Finished difference Result 10593 states and 16637 transitions. [2022-11-25 22:31:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:31:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 108 [2022-11-25 22:31:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:50,348 INFO L225 Difference]: With dead ends: 10593 [2022-11-25 22:31:50,349 INFO L226 Difference]: Without dead ends: 6508 [2022-11-25 22:31:50,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:50,465 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 37 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3482 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:50,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3482 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:31:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6508 states. [2022-11-25 22:31:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6508 to 6077. [2022-11-25 22:31:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 4278 states have (on average 1.4967274427302477) internal successors, (6403), 4494 states have internal predecessors, (6403), 1336 states have call successors, (1336), 335 states have call predecessors, (1336), 462 states have return successors, (1682), 1354 states have call predecessors, (1682), 1331 states have call successors, (1682) [2022-11-25 22:31:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 9421 transitions. [2022-11-25 22:31:51,413 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 9421 transitions. Word has length 108 [2022-11-25 22:31:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:51,414 INFO L495 AbstractCegarLoop]: Abstraction has 6077 states and 9421 transitions. [2022-11-25 22:31:51,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-25 22:31:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 9421 transitions. [2022-11-25 22:31:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 22:31:51,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:51,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:51,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 22:31:51,418 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1585589939, now seen corresponding path program 1 times [2022-11-25 22:31:51,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:51,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330906564] [2022-11-25 22:31:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:51,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:31:51,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:51,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330906564] [2022-11-25 22:31:51,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330906564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:51,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:31:51,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:31:51,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147146551] [2022-11-25 22:31:51,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:51,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:31:51,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:51,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:31:51,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:51,648 INFO L87 Difference]: Start difference. First operand 6077 states and 9421 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-25 22:31:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:53,089 INFO L93 Difference]: Finished difference Result 10792 states and 16888 transitions. [2022-11-25 22:31:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:31:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 109 [2022-11-25 22:31:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:53,121 INFO L225 Difference]: With dead ends: 10792 [2022-11-25 22:31:53,122 INFO L226 Difference]: Without dead ends: 6559 [2022-11-25 22:31:53,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:53,139 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 36 mSDsluCounter, 2910 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3507 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:53,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3507 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:31:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6559 states. [2022-11-25 22:31:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6559 to 6080. [2022-11-25 22:31:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4297 states have (on average 1.5003490807540145) internal successors, (6447), 4481 states have internal predecessors, (6447), 1345 states have call successors, (1345), 332 states have call predecessors, (1345), 437 states have return successors, (1650), 1373 states have call predecessors, (1650), 1340 states have call successors, (1650) [2022-11-25 22:31:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 9442 transitions. [2022-11-25 22:31:54,236 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 9442 transitions. Word has length 109 [2022-11-25 22:31:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:54,237 INFO L495 AbstractCegarLoop]: Abstraction has 6080 states and 9442 transitions. [2022-11-25 22:31:54,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-25 22:31:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 9442 transitions. [2022-11-25 22:31:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-25 22:31:54,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:54,242 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2022-11-25 22:31:54,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 22:31:54,242 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1538438724, now seen corresponding path program 1 times [2022-11-25 22:31:54,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:54,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933700909] [2022-11-25 22:31:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:54,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:31:54,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:54,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933700909] [2022-11-25 22:31:54,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933700909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:31:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308155037] [2022-11-25 22:31:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:54,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:31:54,852 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:31:54,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:31:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 22:31:55,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:31:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:31:55,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:31:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:31:56,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308155037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:31:56,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [847885584] [2022-11-25 22:31:56,566 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-11-25 22:31:56,566 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:31:56,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:31:56,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:31:56,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:31:59,815 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-11-25 22:32:00,826 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 588 for LOIs [2022-11-25 22:32:05,765 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 113 for LOIs [2022-11-25 22:32:06,524 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-11-25 22:32:06,542 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 111 for LOIs [2022-11-25 22:32:07,143 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 101 for LOIs [2022-11-25 22:32:07,155 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 533 for LOIs [2022-11-25 22:32:07,452 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-11-25 22:32:11,240 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-25 22:32:11,955 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 87 for LOIs [2022-11-25 22:32:11,964 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-25 22:32:12,124 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:32:35,208 WARN L233 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:32:42,983 WARN L233 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:32:52,282 WARN L233 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:33:42,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [847885584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:42,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:33:42,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [13, 13, 13] total 76 [2022-11-25 22:33:42,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148034177] [2022-11-25 22:33:42,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:42,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-25 22:33:42,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-25 22:33:42,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=5180, Unknown=0, NotChecked=0, Total=5700 [2022-11-25 22:33:42,147 INFO L87 Difference]: Start difference. First operand 6080 states and 9442 transitions. Second operand has 47 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) [2022-11-25 22:33:49,072 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:33:55,770 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:34:04,906 WARN L233 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 661 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:34:13,109 WARN L233 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 673 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:34:19,981 WARN L233 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 656 DAG size of output: 620 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:34:26,888 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 652 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:34:33,416 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 635 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:34:40,035 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 641 DAG size of output: 608 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:34:47,390 WARN L233 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 671 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:34:54,425 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 658 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:35:01,548 WARN L233 SmtUtils]: Spent 6.63s on a formula simplification. DAG size of input: 662 DAG size of output: 626 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:35:08,731 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 664 DAG size of output: 628 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:35:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:50,852 INFO L93 Difference]: Finished difference Result 10490 states and 16367 transitions. [2022-11-25 22:35:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 22:35:50,853 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) Word has length 121 [2022-11-25 22:35:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:50,882 INFO L225 Difference]: With dead ends: 10490 [2022-11-25 22:35:50,882 INFO L226 Difference]: Without dead ends: 6065 [2022-11-25 22:35:50,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 290 SyntacticMatches, 12 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 176.2s TimeCoverageRelationStatistics Valid=706, Invalid=7304, Unknown=0, NotChecked=0, Total=8010 [2022-11-25 22:35:50,898 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 139 mSDsluCounter, 6970 mSDsCounter, 0 mSdLazyCounter, 10150 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 7448 SdHoareTripleChecker+Invalid, 10184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 10150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:50,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 7448 Invalid, 10184 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 10150 Invalid, 0 Unknown, 0 Unchecked, 41.8s Time] [2022-11-25 22:35:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2022-11-25 22:35:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5998. [2022-11-25 22:35:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4235 states have (on average 1.5036599763872491) internal successors, (6368), 4420 states have internal predecessors, (6368), 1333 states have call successors, (1333), 328 states have call predecessors, (1333), 429 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-11-25 22:35:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9333 transitions. [2022-11-25 22:35:51,789 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9333 transitions. Word has length 121 [2022-11-25 22:35:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:51,789 INFO L495 AbstractCegarLoop]: Abstraction has 5998 states and 9333 transitions. [2022-11-25 22:35:51,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) [2022-11-25 22:35:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9333 transitions. [2022-11-25 22:35:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-25 22:35:51,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:51,793 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:51,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:52,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 22:35:52,000 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:35:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:52,001 INFO L85 PathProgramCache]: Analyzing trace with hash 713606034, now seen corresponding path program 1 times [2022-11-25 22:35:52,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:52,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420525720] [2022-11-25 22:35:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:52,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 22:35:52,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:52,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420525720] [2022-11-25 22:35:52,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420525720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:52,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022455228] [2022-11-25 22:35:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:52,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:52,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:52,255 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:52,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:35:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:52,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:35:52,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 22:35:52,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:35:52,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022455228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:35:52,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:35:52,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-25 22:35:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770911417] [2022-11-25 22:35:52,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:35:52,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:35:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:52,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:35:52,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:35:52,637 INFO L87 Difference]: Start difference. First operand 5998 states and 9333 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 22:35:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:53,892 INFO L93 Difference]: Finished difference Result 11923 states and 18866 transitions. [2022-11-25 22:35:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:35:53,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 118 [2022-11-25 22:35:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:53,916 INFO L225 Difference]: With dead ends: 11923 [2022-11-25 22:35:53,916 INFO L226 Difference]: Without dead ends: 6466 [2022-11-25 22:35:53,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:35:53,938 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 213 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:53,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1416 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:35:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6466 states. [2022-11-25 22:35:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6466 to 6466. [2022-11-25 22:35:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6466 states, 4691 states have (on average 1.5442336388829674) internal successors, (7244), 4876 states have internal predecessors, (7244), 1333 states have call successors, (1333), 340 states have call predecessors, (1333), 441 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-11-25 22:35:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6466 states to 6466 states and 10209 transitions. [2022-11-25 22:35:54,898 INFO L78 Accepts]: Start accepts. Automaton has 6466 states and 10209 transitions. Word has length 118 [2022-11-25 22:35:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:54,899 INFO L495 AbstractCegarLoop]: Abstraction has 6466 states and 10209 transitions. [2022-11-25 22:35:54,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 22:35:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6466 states and 10209 transitions. [2022-11-25 22:35:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-25 22:35:54,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:54,904 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:54,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 22:35:55,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 22:35:55,115 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:35:55,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:55,116 INFO L85 PathProgramCache]: Analyzing trace with hash -178289604, now seen corresponding path program 1 times [2022-11-25 22:35:55,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:55,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568824527] [2022-11-25 22:35:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:55,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-25 22:35:55,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:55,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568824527] [2022-11-25 22:35:55,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568824527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:55,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131192460] [2022-11-25 22:35:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:55,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:55,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:55,246 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:55,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:35:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:55,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:35:55,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 22:35:55,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:35:55,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131192460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:35:55,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:35:55,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-25 22:35:55,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720971078] [2022-11-25 22:35:55,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:35:55,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:35:55,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:35:55,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:35:55,619 INFO L87 Difference]: Start difference. First operand 6466 states and 10209 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 22:35:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:56,805 INFO L93 Difference]: Finished difference Result 12859 states and 20603 transitions. [2022-11-25 22:35:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:35:56,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 123 [2022-11-25 22:35:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:56,832 INFO L225 Difference]: With dead ends: 12859 [2022-11-25 22:35:56,832 INFO L226 Difference]: Without dead ends: 6934 [2022-11-25 22:35:56,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:35:56,853 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 211 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:56,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1416 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:35:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2022-11-25 22:35:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 6934. [2022-11-25 22:35:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6934 states, 5147 states have (on average 1.577618029920342) internal successors, (8120), 5332 states have internal predecessors, (8120), 1333 states have call successors, (1333), 352 states have call predecessors, (1333), 453 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-11-25 22:35:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6934 states to 6934 states and 11085 transitions. [2022-11-25 22:35:57,822 INFO L78 Accepts]: Start accepts. Automaton has 6934 states and 11085 transitions. Word has length 123 [2022-11-25 22:35:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:57,822 INFO L495 AbstractCegarLoop]: Abstraction has 6934 states and 11085 transitions. [2022-11-25 22:35:57,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 22:35:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 6934 states and 11085 transitions. [2022-11-25 22:35:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-25 22:35:57,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:57,828 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:57,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:58,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:58,036 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:35:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash 70581612, now seen corresponding path program 1 times [2022-11-25 22:35:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:58,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539810423] [2022-11-25 22:35:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:58,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-25 22:35:58,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:58,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539810423] [2022-11-25 22:35:58,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539810423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:58,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333118351] [2022-11-25 22:35:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:58,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:58,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:58,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:58,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:35:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:35:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:35:58,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:35:58,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333118351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:35:58,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:35:58,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-25 22:35:58,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636866090] [2022-11-25 22:35:58,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:35:58,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:35:58,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:58,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:35:58,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:35:58,550 INFO L87 Difference]: Start difference. First operand 6934 states and 11085 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 22:35:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:59,618 INFO L93 Difference]: Finished difference Result 13795 states and 22340 transitions. [2022-11-25 22:35:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:35:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 127 [2022-11-25 22:35:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:59,641 INFO L225 Difference]: With dead ends: 13795 [2022-11-25 22:35:59,641 INFO L226 Difference]: Without dead ends: 7402 [2022-11-25 22:35:59,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:35:59,659 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 209 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:59,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1416 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:35:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2022-11-25 22:36:00,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 7402. [2022-11-25 22:36:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 5603 states have (on average 1.605568445475638) internal successors, (8996), 5788 states have internal predecessors, (8996), 1333 states have call successors, (1333), 364 states have call predecessors, (1333), 465 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-11-25 22:36:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 11961 transitions. [2022-11-25 22:36:00,949 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 11961 transitions. Word has length 127 [2022-11-25 22:36:00,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:00,949 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 11961 transitions. [2022-11-25 22:36:00,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 22:36:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 11961 transitions. [2022-11-25 22:36:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 22:36:00,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:00,954 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-11-25 22:36:00,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:01,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 22:36:01,162 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash -786349454, now seen corresponding path program 1 times [2022-11-25 22:36:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:01,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126164451] [2022-11-25 22:36:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:01,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-25 22:36:01,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:01,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126164451] [2022-11-25 22:36:01,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126164451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:01,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934059640] [2022-11-25 22:36:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:01,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:01,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:01,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:01,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:36:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:01,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:36:01,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 22:36:01,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:36:01,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934059640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:01,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:36:01,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-25 22:36:01,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852142246] [2022-11-25 22:36:01,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:01,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:36:01,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:01,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:36:01,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:36:01,629 INFO L87 Difference]: Start difference. First operand 7402 states and 11961 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 22:36:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:02,761 INFO L93 Difference]: Finished difference Result 14731 states and 24077 transitions. [2022-11-25 22:36:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:36:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 130 [2022-11-25 22:36:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:02,784 INFO L225 Difference]: With dead ends: 14731 [2022-11-25 22:36:02,785 INFO L226 Difference]: Without dead ends: 7870 [2022-11-25 22:36:02,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:36:02,798 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 207 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:02,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1416 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:36:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7870 states. [2022-11-25 22:36:03,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7870 to 7870. [2022-11-25 22:36:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7870 states, 6059 states have (on average 1.6293117676184188) internal successors, (9872), 6244 states have internal predecessors, (9872), 1333 states have call successors, (1333), 376 states have call predecessors, (1333), 477 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-11-25 22:36:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7870 states to 7870 states and 12837 transitions. [2022-11-25 22:36:03,749 INFO L78 Accepts]: Start accepts. Automaton has 7870 states and 12837 transitions. Word has length 130 [2022-11-25 22:36:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:03,749 INFO L495 AbstractCegarLoop]: Abstraction has 7870 states and 12837 transitions. [2022-11-25 22:36:03,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 22:36:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7870 states and 12837 transitions. [2022-11-25 22:36:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-25 22:36:03,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:03,754 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:03,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 22:36:03,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 22:36:03,961 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:03,962 INFO L85 PathProgramCache]: Analyzing trace with hash 222979360, now seen corresponding path program 1 times [2022-11-25 22:36:03,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:03,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692492139] [2022-11-25 22:36:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:03,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 22:36:04,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:04,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692492139] [2022-11-25 22:36:04,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692492139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:04,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848825950] [2022-11-25 22:36:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:04,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:04,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:04,282 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:04,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:36:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 22:36:04,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-25 22:36:04,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:36:04,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848825950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:04,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:36:04,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-25 22:36:04,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905916318] [2022-11-25 22:36:04,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:04,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:36:04,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:04,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:36:04,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:36:04,616 INFO L87 Difference]: Start difference. First operand 7870 states and 12837 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-25 22:36:05,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:05,548 INFO L93 Difference]: Finished difference Result 8041 states and 13127 transitions. [2022-11-25 22:36:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:36:05,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 132 [2022-11-25 22:36:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:05,572 INFO L225 Difference]: With dead ends: 8041 [2022-11-25 22:36:05,572 INFO L226 Difference]: Without dead ends: 8026 [2022-11-25 22:36:05,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:36:05,578 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 44 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:05,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1695 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2022-11-25 22:36:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 7892. [2022-11-25 22:36:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7892 states, 6081 states have (on average 1.6268705804966288) internal successors, (9893), 6266 states have internal predecessors, (9893), 1333 states have call successors, (1333), 376 states have call predecessors, (1333), 477 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-11-25 22:36:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7892 states to 7892 states and 12858 transitions. [2022-11-25 22:36:06,439 INFO L78 Accepts]: Start accepts. Automaton has 7892 states and 12858 transitions. Word has length 132 [2022-11-25 22:36:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:06,439 INFO L495 AbstractCegarLoop]: Abstraction has 7892 states and 12858 transitions. [2022-11-25 22:36:06,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-25 22:36:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 7892 states and 12858 transitions. [2022-11-25 22:36:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-25 22:36:06,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:06,447 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:06,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 22:36:06,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:06,655 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1741265328, now seen corresponding path program 1 times [2022-11-25 22:36:06,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:06,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588585773] [2022-11-25 22:36:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:06,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:36:07,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:07,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588585773] [2022-11-25 22:36:07,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588585773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:07,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521242425] [2022-11-25 22:36:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:07,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:07,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:07,355 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:07,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d4aaf-4596-4fdd-8c2c-2ad50591bc32/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:36:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:07,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:36:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-25 22:36:08,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-25 22:36:08,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521242425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:08,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1733045282] [2022-11-25 22:36:08,363 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2022-11-25 22:36:08,363 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:08,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:08,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:08,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:14,558 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 420 for LOIs [2022-11-25 22:36:14,619 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs