./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:22:34,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:22:34,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:22:34,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:22:34,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:22:34,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:22:34,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:22:34,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:22:34,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:22:34,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:22:34,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:22:34,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:22:34,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:22:34,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:22:34,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:22:34,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:22:34,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:22:34,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:22:34,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:22:34,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:22:34,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:22:34,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:22:34,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:22:34,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:22:34,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:22:34,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:22:34,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:22:34,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:22:34,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:22:34,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:22:34,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:22:34,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:22:34,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:22:34,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:22:34,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:22:34,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:22:34,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:22:34,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:22:34,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:22:34,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:22:34,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:22:34,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:22:34,120 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:22:34,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:22:34,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:22:34,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:22:34,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:22:34,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:22:34,121 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:22:34,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:22:34,121 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:22:34,121 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:22:34,121 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:22:34,121 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:22:34,121 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:22:34,121 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:22:34,121 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:22:34,121 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:22:34,122 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:22:34,122 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:22:34,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:22:34,122 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:22:34,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:22:34,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:22:34,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:22:34,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:22:34,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:22:34,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:22:34,123 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:22:34,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:22:34,123 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:22:34,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:22:34,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:22:34,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:22:34,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:22:34,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:22:34,124 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:22:34,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:22:34,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:22:34,124 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:22:34,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:22:34,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:22:34,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:22:34,124 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_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e [2022-12-14 11:22:34,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:22:34,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:22:34,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:22:34,333 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:22:34,334 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:22:34,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2022-12-14 11:22:37,018 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:22:37,216 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:22:37,217 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2022-12-14 11:22:37,229 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/data/9573f6812/a80a8db2b70744babb8b6cf1ef267c0e/FLAGc22c4b172 [2022-12-14 11:22:37,241 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/data/9573f6812/a80a8db2b70744babb8b6cf1ef267c0e [2022-12-14 11:22:37,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:22:37,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:22:37,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:22:37,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:22:37,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:22:37,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f6c104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37, skipping insertion in model container [2022-12-14 11:22:37,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:22:37,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:22:37,461 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_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2022-12-14 11:22:37,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:22:37,623 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:22:37,648 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_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2022-12-14 11:22:37,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:22:37,750 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:22:37,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37 WrapperNode [2022-12-14 11:22:37,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:22:37,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:22:37,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:22:37,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:22:37,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,822 INFO L138 Inliner]: procedures = 95, calls = 344, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 873 [2022-12-14 11:22:37,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:22:37,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:22:37,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:22:37,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:22:37,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,873 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:22:37,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:22:37,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:22:37,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:22:37,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (1/1) ... [2022-12-14 11:22:37,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:22:37,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:22:37,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:22:37,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:22:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:22:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 11:22:37,940 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 11:22:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 11:22:37,941 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 11:22:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 11:22:37,941 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 11:22:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 11:22:37,941 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 11:22:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 11:22:37,941 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 11:22:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 11:22:37,941 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 11:22:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 11:22:37,941 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 11:22:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 11:22:37,942 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 11:22:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 11:22:37,942 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 11:22:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 11:22:37,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 11:22:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 11:22:37,942 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 11:22:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 11:22:37,942 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 11:22:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 11:22:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 11:22:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 11:22:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 11:22:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 11:22:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 11:22:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 11:22:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 11:22:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 11:22:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 11:22:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 11:22:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 11:22:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 11:22:37,944 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 11:22:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-12-14 11:22:37,944 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-12-14 11:22:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:22:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 11:22:37,944 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 11:22:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 11:22:37,944 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 11:22:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 11:22:37,944 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 11:22:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 11:22:37,944 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 11:22:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-12-14 11:22:37,945 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-12-14 11:22:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:22:37,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:22:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 11:22:37,945 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 11:22:38,067 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:22:38,069 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:22:38,824 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:22:39,341 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:22:39,341 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:22:39,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:22:39 BoogieIcfgContainer [2022-12-14 11:22:39,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:22:39,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:22:39,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:22:39,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:22:39,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:22:37" (1/3) ... [2022-12-14 11:22:39,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21941819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:22:39, skipping insertion in model container [2022-12-14 11:22:39,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:22:37" (2/3) ... [2022-12-14 11:22:39,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21941819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:22:39, skipping insertion in model container [2022-12-14 11:22:39,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:22:39" (3/3) ... [2022-12-14 11:22:39,353 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product30.cil.c [2022-12-14 11:22:39,373 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:22:39,373 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:22:39,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:22:39,435 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;@6f4eae8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:22:39,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:22:39,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2022-12-14 11:22:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 11:22:39,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:39,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:22:39,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash -554525065, now seen corresponding path program 1 times [2022-12-14 11:22:39,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:39,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516594633] [2022-12-14 11:22:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:39,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:39,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:39,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516594633] [2022-12-14 11:22:39,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516594633] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:39,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:39,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:22:39,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849965735] [2022-12-14 11:22:39,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:39,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 11:22:39,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:39,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 11:22:39,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:22:39,801 INFO L87 Difference]: Start difference. First operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 11:22:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:39,938 INFO L93 Difference]: Finished difference Result 396 states and 622 transitions. [2022-12-14 11:22:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 11:22:39,940 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2022-12-14 11:22:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:39,954 INFO L225 Difference]: With dead ends: 396 [2022-12-14 11:22:39,955 INFO L226 Difference]: Without dead ends: 374 [2022-12-14 11:22:39,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:22:39,961 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:39,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 549 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:22:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-12-14 11:22:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2022-12-14 11:22:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 252 states have (on average 1.5753968253968254) internal successors, (397), 273 states have internal predecessors, (397), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2022-12-14 11:22:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 584 transitions. [2022-12-14 11:22:40,026 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 584 transitions. Word has length 43 [2022-12-14 11:22:40,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:40,028 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 584 transitions. [2022-12-14 11:22:40,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 11:22:40,029 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 584 transitions. [2022-12-14 11:22:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 11:22:40,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:40,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:22:40,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:22:40,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash 335988881, now seen corresponding path program 1 times [2022-12-14 11:22:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:40,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468208174] [2022-12-14 11:22:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:40,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:40,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:40,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468208174] [2022-12-14 11:22:40,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468208174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:40,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:40,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:22:40,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305057673] [2022-12-14 11:22:40,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:40,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:22:40,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:40,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:22:40,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:22:40,424 INFO L87 Difference]: Start difference. First operand 374 states and 584 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:22:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:41,889 INFO L93 Difference]: Finished difference Result 1210 states and 1926 transitions. [2022-12-14 11:22:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:22:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-12-14 11:22:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:41,898 INFO L225 Difference]: With dead ends: 1210 [2022-12-14 11:22:41,898 INFO L226 Difference]: Without dead ends: 852 [2022-12-14 11:22:41,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:22:41,903 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1196 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:41,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1260 Valid, 894 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:22:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-12-14 11:22:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 755. [2022-12-14 11:22:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 528 states have (on average 1.5909090909090908) internal successors, (840), 558 states have internal predecessors, (840), 179 states have call successors, (179), 46 states have call predecessors, (179), 47 states have return successors, (181), 163 states have call predecessors, (181), 174 states have call successors, (181) [2022-12-14 11:22:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1200 transitions. [2022-12-14 11:22:41,974 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1200 transitions. Word has length 44 [2022-12-14 11:22:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:41,974 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1200 transitions. [2022-12-14 11:22:41,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:22:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1200 transitions. [2022-12-14 11:22:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 11:22:41,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:41,980 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:22:41,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:22:41,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:41,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1087305725, now seen corresponding path program 1 times [2022-12-14 11:22:41,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:41,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569936898] [2022-12-14 11:22:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:41,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:42,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:42,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569936898] [2022-12-14 11:22:42,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569936898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:42,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:42,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:22:42,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751063040] [2022-12-14 11:22:42,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:42,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:22:42,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:42,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:22:42,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:22:42,302 INFO L87 Difference]: Start difference. First operand 755 states and 1200 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2022-12-14 11:22:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:44,443 INFO L93 Difference]: Finished difference Result 2572 states and 4125 transitions. [2022-12-14 11:22:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 11:22:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 75 [2022-12-14 11:22:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:44,459 INFO L225 Difference]: With dead ends: 2572 [2022-12-14 11:22:44,459 INFO L226 Difference]: Without dead ends: 1833 [2022-12-14 11:22:44,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:22:44,466 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 1280 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 4324 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 4959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 4324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:44,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 1962 Invalid, 4959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 4324 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 11:22:44,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-12-14 11:22:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1680. [2022-12-14 11:22:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1143 states have (on average 1.5643044619422573) internal successors, (1788), 1215 states have internal predecessors, (1788), 439 states have call successors, (439), 85 states have call predecessors, (439), 97 states have return successors, (458), 412 states have call predecessors, (458), 434 states have call successors, (458) [2022-12-14 11:22:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2685 transitions. [2022-12-14 11:22:44,559 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2685 transitions. Word has length 75 [2022-12-14 11:22:44,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:44,559 INFO L495 AbstractCegarLoop]: Abstraction has 1680 states and 2685 transitions. [2022-12-14 11:22:44,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2022-12-14 11:22:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2685 transitions. [2022-12-14 11:22:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 11:22:44,562 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:44,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:22:44,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:22:44,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1283308087, now seen corresponding path program 1 times [2022-12-14 11:22:44,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:44,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503980615] [2022-12-14 11:22:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:44,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:44,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:44,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503980615] [2022-12-14 11:22:44,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503980615] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:44,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:44,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:22:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061941386] [2022-12-14 11:22:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:44,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:22:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:22:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:22:44,724 INFO L87 Difference]: Start difference. First operand 1680 states and 2685 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 11:22:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:45,076 INFO L93 Difference]: Finished difference Result 3915 states and 6340 transitions. [2022-12-14 11:22:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:22:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2022-12-14 11:22:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:45,089 INFO L225 Difference]: With dead ends: 3915 [2022-12-14 11:22:45,090 INFO L226 Difference]: Without dead ends: 2253 [2022-12-14 11:22:45,097 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 [2022-12-14 11:22:45,098 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 177 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:45,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2240 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:22:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-12-14 11:22:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1698. [2022-12-14 11:22:45,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1161 states have (on average 1.5555555555555556) internal successors, (1806), 1233 states have internal predecessors, (1806), 439 states have call successors, (439), 85 states have call predecessors, (439), 97 states have return successors, (458), 412 states have call predecessors, (458), 434 states have call successors, (458) [2022-12-14 11:22:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2703 transitions. [2022-12-14 11:22:45,215 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2703 transitions. Word has length 76 [2022-12-14 11:22:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:45,215 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2703 transitions. [2022-12-14 11:22:45,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 11:22:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2703 transitions. [2022-12-14 11:22:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 11:22:45,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:45,217 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] [2022-12-14 11:22:45,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:22:45,218 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:45,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:45,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1473176253, now seen corresponding path program 1 times [2022-12-14 11:22:45,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:45,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425262764] [2022-12-14 11:22:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:45,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:22:45,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:45,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425262764] [2022-12-14 11:22:45,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425262764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:45,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:45,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 11:22:45,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797221622] [2022-12-14 11:22:45,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:45,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:22:45,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:45,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:22:45,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:22:45,479 INFO L87 Difference]: Start difference. First operand 1698 states and 2703 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-14 11:22:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:47,706 INFO L93 Difference]: Finished difference Result 4769 states and 7618 transitions. [2022-12-14 11:22:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 11:22:47,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 78 [2022-12-14 11:22:47,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:47,719 INFO L225 Difference]: With dead ends: 4769 [2022-12-14 11:22:47,719 INFO L226 Difference]: Without dead ends: 3089 [2022-12-14 11:22:47,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:22:47,727 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1715 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 3922 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 4509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 3922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:47,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1774 Valid, 2331 Invalid, 4509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 3922 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 11:22:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2022-12-14 11:22:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2954. [2022-12-14 11:22:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2093 states have (on average 1.5805064500716675) internal successors, (3308), 2184 states have internal predecessors, (3308), 680 states have call successors, (680), 150 states have call predecessors, (680), 180 states have return successors, (743), 663 states have call predecessors, (743), 675 states have call successors, (743) [2022-12-14 11:22:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 4731 transitions. [2022-12-14 11:22:47,869 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 4731 transitions. Word has length 78 [2022-12-14 11:22:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:47,869 INFO L495 AbstractCegarLoop]: Abstraction has 2954 states and 4731 transitions. [2022-12-14 11:22:47,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-14 11:22:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 4731 transitions. [2022-12-14 11:22:47,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 11:22:47,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:47,871 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] [2022-12-14 11:22:47,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:22:47,871 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:47,872 INFO L85 PathProgramCache]: Analyzing trace with hash -93114492, now seen corresponding path program 1 times [2022-12-14 11:22:47,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:47,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899652488] [2022-12-14 11:22:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:47,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:22:48,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:48,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899652488] [2022-12-14 11:22:48,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899652488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:48,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:48,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:22:48,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358000786] [2022-12-14 11:22:48,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:48,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:22:48,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:48,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:22:48,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:22:48,034 INFO L87 Difference]: Start difference. First operand 2954 states and 4731 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 11:22:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:48,321 INFO L93 Difference]: Finished difference Result 5282 states and 8482 transitions. [2022-12-14 11:22:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:22:48,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-12-14 11:22:48,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:48,332 INFO L225 Difference]: With dead ends: 5282 [2022-12-14 11:22:48,332 INFO L226 Difference]: Without dead ends: 3066 [2022-12-14 11:22:48,340 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 [2022-12-14 11:22:48,341 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 6 mSDsluCounter, 2714 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:48,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3266 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:22:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2022-12-14 11:22:48,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 3024. [2022-12-14 11:22:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 2143 states have (on average 1.566962202519832) internal successors, (3358), 2234 states have internal predecessors, (3358), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 683 states have call predecessors, (793), 675 states have call successors, (793) [2022-12-14 11:22:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 4831 transitions. [2022-12-14 11:22:48,493 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 4831 transitions. Word has length 82 [2022-12-14 11:22:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:48,494 INFO L495 AbstractCegarLoop]: Abstraction has 3024 states and 4831 transitions. [2022-12-14 11:22:48,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 11:22:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 4831 transitions. [2022-12-14 11:22:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 11:22:48,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:48,496 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, 1] [2022-12-14 11:22:48,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 11:22:48,496 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1337783946, now seen corresponding path program 1 times [2022-12-14 11:22:48,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:48,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276762320] [2022-12-14 11:22:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:48,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:22:48,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:48,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276762320] [2022-12-14 11:22:48,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276762320] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:48,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:48,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:22:48,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302592879] [2022-12-14 11:22:48,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:22:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:22:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:22:48,713 INFO L87 Difference]: Start difference. First operand 3024 states and 4831 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 11:22:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:48,954 INFO L93 Difference]: Finished difference Result 5388 states and 8622 transitions. [2022-12-14 11:22:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:22:48,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-12-14 11:22:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:48,967 INFO L225 Difference]: With dead ends: 5388 [2022-12-14 11:22:48,968 INFO L226 Difference]: Without dead ends: 3116 [2022-12-14 11:22:48,976 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 [2022-12-14 11:22:48,976 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 6 mSDsluCounter, 2710 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:48,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3261 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:22:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-12-14 11:22:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3034. [2022-12-14 11:22:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 2153 states have (on average 1.564328843474222) internal successors, (3368), 2234 states have internal predecessors, (3368), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 693 states have call predecessors, (793), 675 states have call successors, (793) [2022-12-14 11:22:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4841 transitions. [2022-12-14 11:22:49,124 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4841 transitions. Word has length 83 [2022-12-14 11:22:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:49,125 INFO L495 AbstractCegarLoop]: Abstraction has 3034 states and 4841 transitions. [2022-12-14 11:22:49,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 11:22:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4841 transitions. [2022-12-14 11:22:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 11:22:49,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:49,126 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, 1] [2022-12-14 11:22:49,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:22:49,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1456196714, now seen corresponding path program 1 times [2022-12-14 11:22:49,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:49,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153551593] [2022-12-14 11:22:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:22:49,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:49,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153551593] [2022-12-14 11:22:49,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153551593] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:49,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:49,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:22:49,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473895495] [2022-12-14 11:22:49,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:49,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:22:49,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:49,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:22:49,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:22:49,284 INFO L87 Difference]: Start difference. First operand 3034 states and 4841 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 11:22:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:49,534 INFO L93 Difference]: Finished difference Result 5406 states and 8640 transitions. [2022-12-14 11:22:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:22:49,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-12-14 11:22:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:49,545 INFO L225 Difference]: With dead ends: 5406 [2022-12-14 11:22:49,545 INFO L226 Difference]: Without dead ends: 3126 [2022-12-14 11:22:49,552 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 [2022-12-14 11:22:49,552 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 7 mSDsluCounter, 2699 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3247 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:49,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3247 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:22:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2022-12-14 11:22:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 3044. [2022-12-14 11:22:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 2163 states have (on average 1.5617198335644937) internal successors, (3378), 2234 states have internal predecessors, (3378), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 703 states have call predecessors, (793), 675 states have call successors, (793) [2022-12-14 11:22:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 4851 transitions. [2022-12-14 11:22:49,688 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 4851 transitions. Word has length 83 [2022-12-14 11:22:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:49,688 INFO L495 AbstractCegarLoop]: Abstraction has 3044 states and 4851 transitions. [2022-12-14 11:22:49,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 11:22:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 4851 transitions. [2022-12-14 11:22:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 11:22:49,690 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:49,690 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, 1, 1, 1, 1] [2022-12-14 11:22:49,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 11:22:49,690 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:49,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1440045404, now seen corresponding path program 1 times [2022-12-14 11:22:49,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:49,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87889034] [2022-12-14 11:22:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:49,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:22:49,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:49,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87889034] [2022-12-14 11:22:49,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87889034] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:49,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:49,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:22:49,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431701209] [2022-12-14 11:22:49,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:49,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:22:49,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:49,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:22:49,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:22:49,879 INFO L87 Difference]: Start difference. First operand 3044 states and 4851 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-12-14 11:22:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:51,626 INFO L93 Difference]: Finished difference Result 7552 states and 12115 transitions. [2022-12-14 11:22:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:22:51,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) Word has length 86 [2022-12-14 11:22:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:51,642 INFO L225 Difference]: With dead ends: 7552 [2022-12-14 11:22:51,642 INFO L226 Difference]: Without dead ends: 5022 [2022-12-14 11:22:51,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:22:51,650 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 1678 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1833 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 3017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:51,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1833 Valid, 1365 Invalid, 3017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 11:22:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2022-12-14 11:22:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 4910. [2022-12-14 11:22:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 3416 states have (on average 1.5199063231850116) internal successors, (5192), 3557 states have internal predecessors, (5192), 1147 states have call successors, (1147), 266 states have call predecessors, (1147), 346 states have return successors, (1367), 1163 states have call predecessors, (1367), 1142 states have call successors, (1367) [2022-12-14 11:22:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 7706 transitions. [2022-12-14 11:22:51,905 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 7706 transitions. Word has length 86 [2022-12-14 11:22:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:51,906 INFO L495 AbstractCegarLoop]: Abstraction has 4910 states and 7706 transitions. [2022-12-14 11:22:51,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-12-14 11:22:51,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 7706 transitions. [2022-12-14 11:22:51,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 11:22:51,907 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:51,908 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:22:51,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 11:22:51,908 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:51,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:51,908 INFO L85 PathProgramCache]: Analyzing trace with hash 338806529, now seen corresponding path program 1 times [2022-12-14 11:22:51,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:51,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128556103] [2022-12-14 11:22:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:51,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:22:52,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:52,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128556103] [2022-12-14 11:22:52,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128556103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:52,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:52,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 11:22:52,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319218870] [2022-12-14 11:22:52,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:52,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 11:22:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 11:22:52,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:22:52,178 INFO L87 Difference]: Start difference. First operand 4910 states and 7706 transitions. Second operand has 13 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 11:22:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:55,230 INFO L93 Difference]: Finished difference Result 10325 states and 16514 transitions. [2022-12-14 11:22:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 11:22:55,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 89 [2022-12-14 11:22:55,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:55,247 INFO L225 Difference]: With dead ends: 10325 [2022-12-14 11:22:55,248 INFO L226 Difference]: Without dead ends: 5841 [2022-12-14 11:22:55,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 11:22:55,261 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 2025 mSDsluCounter, 3648 mSDsCounter, 0 mSdLazyCounter, 7682 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 4134 SdHoareTripleChecker+Invalid, 8855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 7682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:55,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2043 Valid, 4134 Invalid, 8855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1173 Valid, 7682 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 11:22:55,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2022-12-14 11:22:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 5691. [2022-12-14 11:22:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5691 states, 4127 states have (on average 1.5294402713835715) internal successors, (6312), 4288 states have internal predecessors, (6312), 1167 states have call successors, (1167), 296 states have call predecessors, (1167), 396 states have return successors, (1387), 1183 states have call predecessors, (1387), 1162 states have call successors, (1387) [2022-12-14 11:22:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5691 states to 5691 states and 8866 transitions. [2022-12-14 11:22:55,523 INFO L78 Accepts]: Start accepts. Automaton has 5691 states and 8866 transitions. Word has length 89 [2022-12-14 11:22:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:55,523 INFO L495 AbstractCegarLoop]: Abstraction has 5691 states and 8866 transitions. [2022-12-14 11:22:55,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 11:22:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5691 states and 8866 transitions. [2022-12-14 11:22:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 11:22:55,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:55,526 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:22:55,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 11:22:55,526 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:55,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:55,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1568652437, now seen corresponding path program 1 times [2022-12-14 11:22:55,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:55,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612164140] [2022-12-14 11:22:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:22:55,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:55,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612164140] [2022-12-14 11:22:55,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612164140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:55,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:55,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:22:55,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538761357] [2022-12-14 11:22:55,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:55,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:22:55,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:55,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:22:55,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:22:55,673 INFO L87 Difference]: Start difference. First operand 5691 states and 8866 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 11:22:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:58,019 INFO L93 Difference]: Finished difference Result 18506 states and 29592 transitions. [2022-12-14 11:22:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:22:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 90 [2022-12-14 11:22:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:58,071 INFO L225 Difference]: With dead ends: 18506 [2022-12-14 11:22:58,071 INFO L226 Difference]: Without dead ends: 12833 [2022-12-14 11:22:58,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:22:58,087 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 2218 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:58,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2325 Valid, 1593 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 11:22:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12833 states. [2022-12-14 11:22:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12833 to 11957. [2022-12-14 11:22:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 8499 states have (on average 1.5166490175314742) internal successors, (12890), 8942 states have internal predecessors, (12890), 2644 states have call successors, (2644), 608 states have call predecessors, (2644), 813 states have return successors, (3306), 2637 states have call predecessors, (3306), 2639 states have call successors, (3306) [2022-12-14 11:22:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 18840 transitions. [2022-12-14 11:22:58,716 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 18840 transitions. Word has length 90 [2022-12-14 11:22:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:58,717 INFO L495 AbstractCegarLoop]: Abstraction has 11957 states and 18840 transitions. [2022-12-14 11:22:58,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 11:22:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 18840 transitions. [2022-12-14 11:22:58,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 11:22:58,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:58,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:22:58,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 11:22:58,719 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:22:58,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:58,719 INFO L85 PathProgramCache]: Analyzing trace with hash 141467088, now seen corresponding path program 1 times [2022-12-14 11:22:58,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:58,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792638346] [2022-12-14 11:22:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:58,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:22:58,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:58,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792638346] [2022-12-14 11:22:58,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792638346] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:58,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:58,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:22:58,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308903577] [2022-12-14 11:22:58,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:58,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:22:58,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:58,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:22:58,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:22:58,895 INFO L87 Difference]: Start difference. First operand 11957 states and 18840 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 11:23:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:01,016 INFO L93 Difference]: Finished difference Result 23286 states and 36876 transitions. [2022-12-14 11:23:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:23:01,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2022-12-14 11:23:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:01,060 INFO L225 Difference]: With dead ends: 23286 [2022-12-14 11:23:01,060 INFO L226 Difference]: Without dead ends: 12875 [2022-12-14 11:23:01,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:23:01,110 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 969 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:01,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 1482 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:23:01,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12875 states. [2022-12-14 11:23:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12875 to 12163. [2022-12-14 11:23:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12163 states, 8643 states have (on average 1.5133634154807358) internal successors, (13080), 9114 states have internal predecessors, (13080), 2648 states have call successors, (2648), 640 states have call predecessors, (2648), 871 states have return successors, (3384), 2639 states have call predecessors, (3384), 2643 states have call successors, (3384) [2022-12-14 11:23:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12163 states to 12163 states and 19112 transitions. [2022-12-14 11:23:01,733 INFO L78 Accepts]: Start accepts. Automaton has 12163 states and 19112 transitions. Word has length 91 [2022-12-14 11:23:01,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:01,733 INFO L495 AbstractCegarLoop]: Abstraction has 12163 states and 19112 transitions. [2022-12-14 11:23:01,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 11:23:01,733 INFO L276 IsEmpty]: Start isEmpty. Operand 12163 states and 19112 transitions. [2022-12-14 11:23:01,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 11:23:01,735 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:01,735 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, 1, 1, 1, 1] [2022-12-14 11:23:01,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 11:23:01,736 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash 366433908, now seen corresponding path program 1 times [2022-12-14 11:23:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:01,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258999828] [2022-12-14 11:23:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:01,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:23:01,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:01,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258999828] [2022-12-14 11:23:01,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258999828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:01,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:23:01,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:23:01,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526933355] [2022-12-14 11:23:01,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:01,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:23:01,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:01,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:23:01,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:23:01,869 INFO L87 Difference]: Start difference. First operand 12163 states and 19112 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:23:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:02,951 INFO L93 Difference]: Finished difference Result 12289 states and 19321 transitions. [2022-12-14 11:23:02,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:23:02,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2022-12-14 11:23:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:02,988 INFO L225 Difference]: With dead ends: 12289 [2022-12-14 11:23:02,988 INFO L226 Difference]: Without dead ends: 12274 [2022-12-14 11:23:02,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:23:02,995 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 648 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:02,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1800 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:23:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12274 states. [2022-12-14 11:23:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12274 to 12171. [2022-12-14 11:23:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12171 states, 8651 states have (on average 1.5128886833892035) internal successors, (13088), 9122 states have internal predecessors, (13088), 2648 states have call successors, (2648), 640 states have call predecessors, (2648), 871 states have return successors, (3384), 2639 states have call predecessors, (3384), 2643 states have call successors, (3384) [2022-12-14 11:23:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12171 states to 12171 states and 19120 transitions. [2022-12-14 11:23:03,640 INFO L78 Accepts]: Start accepts. Automaton has 12171 states and 19120 transitions. Word has length 95 [2022-12-14 11:23:03,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:03,641 INFO L495 AbstractCegarLoop]: Abstraction has 12171 states and 19120 transitions. [2022-12-14 11:23:03,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:23:03,641 INFO L276 IsEmpty]: Start isEmpty. Operand 12171 states and 19120 transitions. [2022-12-14 11:23:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 11:23:03,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:03,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:23:03,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 11:23:03,643 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1811416135, now seen corresponding path program 1 times [2022-12-14 11:23:03,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:03,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477510265] [2022-12-14 11:23:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:03,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:23:03,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:03,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477510265] [2022-12-14 11:23:03,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477510265] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:03,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:23:03,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 11:23:03,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022336932] [2022-12-14 11:23:03,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:03,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 11:23:03,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:03,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 11:23:03,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:23:03,959 INFO L87 Difference]: Start difference. First operand 12171 states and 19120 transitions. Second operand has 13 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 11:23:07,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:07,769 INFO L93 Difference]: Finished difference Result 13281 states and 20832 transitions. [2022-12-14 11:23:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 11:23:07,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 101 [2022-12-14 11:23:07,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:07,810 INFO L225 Difference]: With dead ends: 13281 [2022-12-14 11:23:07,811 INFO L226 Difference]: Without dead ends: 13264 [2022-12-14 11:23:07,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 11:23:07,820 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 2552 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 7768 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2578 SdHoareTripleChecker+Valid, 3559 SdHoareTripleChecker+Invalid, 9198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 7768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:07,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2578 Valid, 3559 Invalid, 9198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 7768 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 11:23:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13264 states. [2022-12-14 11:23:08,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13264 to 12791. [2022-12-14 11:23:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12791 states, 9139 states have (on average 1.520078783236678) internal successors, (13892), 9606 states have internal predecessors, (13892), 2690 states have call successors, (2690), 731 states have call predecessors, (2690), 961 states have return successors, (3437), 2684 states have call predecessors, (3437), 2685 states have call successors, (3437) [2022-12-14 11:23:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12791 states to 12791 states and 20019 transitions. [2022-12-14 11:23:08,558 INFO L78 Accepts]: Start accepts. Automaton has 12791 states and 20019 transitions. Word has length 101 [2022-12-14 11:23:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:08,559 INFO L495 AbstractCegarLoop]: Abstraction has 12791 states and 20019 transitions. [2022-12-14 11:23:08,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 11:23:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 12791 states and 20019 transitions. [2022-12-14 11:23:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 11:23:08,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:08,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:23:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 11:23:08,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash 614236147, now seen corresponding path program 1 times [2022-12-14 11:23:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:08,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916295616] [2022-12-14 11:23:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:08,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:23:08,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:08,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916295616] [2022-12-14 11:23:08,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916295616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:08,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:23:08,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:23:08,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062015319] [2022-12-14 11:23:08,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:08,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:23:08,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:23:08,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:08,628 INFO L87 Difference]: Start difference. First operand 12791 states and 20019 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:23:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:09,869 INFO L93 Difference]: Finished difference Result 35491 states and 55920 transitions. [2022-12-14 11:23:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:23:09,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2022-12-14 11:23:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:09,949 INFO L225 Difference]: With dead ends: 35491 [2022-12-14 11:23:09,949 INFO L226 Difference]: Without dead ends: 22723 [2022-12-14 11:23:09,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:09,987 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 540 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:09,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1193 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:23:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22723 states. [2022-12-14 11:23:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22723 to 22414. [2022-12-14 11:23:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22414 states, 16077 states have (on average 1.519873110654973) internal successors, (24435), 16942 states have internal predecessors, (24435), 4649 states have call successors, (4649), 1279 states have call predecessors, (4649), 1687 states have return successors, (6162), 4528 states have call predecessors, (6162), 4644 states have call successors, (6162) [2022-12-14 11:23:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22414 states to 22414 states and 35246 transitions. [2022-12-14 11:23:11,361 INFO L78 Accepts]: Start accepts. Automaton has 22414 states and 35246 transitions. Word has length 107 [2022-12-14 11:23:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:11,362 INFO L495 AbstractCegarLoop]: Abstraction has 22414 states and 35246 transitions. [2022-12-14 11:23:11,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:23:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 22414 states and 35246 transitions. [2022-12-14 11:23:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 11:23:11,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:11,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:23:11,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 11:23:11,364 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1861312963, now seen corresponding path program 1 times [2022-12-14 11:23:11,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:11,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77867378] [2022-12-14 11:23:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:11,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:23:11,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:11,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77867378] [2022-12-14 11:23:11,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77867378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:11,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:23:11,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:23:11,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565435113] [2022-12-14 11:23:11,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:11,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:23:11,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:11,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:23:11,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:11,428 INFO L87 Difference]: Start difference. First operand 22414 states and 35246 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:23:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:13,790 INFO L93 Difference]: Finished difference Result 64359 states and 102160 transitions. [2022-12-14 11:23:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:23:13,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 108 [2022-12-14 11:23:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:13,977 INFO L225 Difference]: With dead ends: 64359 [2022-12-14 11:23:13,977 INFO L226 Difference]: Without dead ends: 41971 [2022-12-14 11:23:14,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:14,066 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 539 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:14,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1199 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:23:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41971 states. [2022-12-14 11:23:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41971 to 41671. [2022-12-14 11:23:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41671 states, 29964 states have (on average 1.5186223468161795) internal successors, (45504), 31625 states have internal predecessors, (45504), 8567 states have call successors, (8567), 2375 states have call predecessors, (8567), 3139 states have return successors, (11920), 8216 states have call predecessors, (11920), 8562 states have call successors, (11920) [2022-12-14 11:23:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41671 states to 41671 states and 65991 transitions. [2022-12-14 11:23:16,440 INFO L78 Accepts]: Start accepts. Automaton has 41671 states and 65991 transitions. Word has length 108 [2022-12-14 11:23:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:16,441 INFO L495 AbstractCegarLoop]: Abstraction has 41671 states and 65991 transitions. [2022-12-14 11:23:16,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:23:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 41671 states and 65991 transitions. [2022-12-14 11:23:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 11:23:16,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:16,443 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:23:16,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 11:23:16,443 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:16,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash -981050079, now seen corresponding path program 1 times [2022-12-14 11:23:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:16,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758924154] [2022-12-14 11:23:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:16,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:23:16,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:16,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758924154] [2022-12-14 11:23:16,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758924154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:16,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:23:16,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:23:16,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752523240] [2022-12-14 11:23:16,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:16,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:23:16,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:23:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:16,507 INFO L87 Difference]: Start difference. First operand 41671 states and 65991 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:23:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:21,241 INFO L93 Difference]: Finished difference Result 122126 states and 196136 transitions. [2022-12-14 11:23:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:23:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 110 [2022-12-14 11:23:21,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:21,551 INFO L225 Difference]: With dead ends: 122126 [2022-12-14 11:23:21,551 INFO L226 Difference]: Without dead ends: 80487 [2022-12-14 11:23:21,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:21,681 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 538 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:21,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1206 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:23:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80487 states. [2022-12-14 11:23:26,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80487 to 80196. [2022-12-14 11:23:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80196 states, 57749 states have (on average 1.5164591594659649) internal successors, (87574), 61002 states have internal predecessors, (87574), 16403 states have call successors, (16403), 4567 states have call predecessors, (16403), 6043 states have return successors, (24462), 15592 states have call predecessors, (24462), 16398 states have call successors, (24462) [2022-12-14 11:23:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80196 states to 80196 states and 128439 transitions. [2022-12-14 11:23:26,946 INFO L78 Accepts]: Start accepts. Automaton has 80196 states and 128439 transitions. Word has length 110 [2022-12-14 11:23:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:26,946 INFO L495 AbstractCegarLoop]: Abstraction has 80196 states and 128439 transitions. [2022-12-14 11:23:26,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:23:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 80196 states and 128439 transitions. [2022-12-14 11:23:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 11:23:26,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:26,949 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:23:26,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 11:23:26,949 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:26,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2011062085, now seen corresponding path program 1 times [2022-12-14 11:23:26,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:26,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711230440] [2022-12-14 11:23:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:26,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:23:27,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:27,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711230440] [2022-12-14 11:23:27,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711230440] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:27,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:23:27,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:23:27,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58566680] [2022-12-14 11:23:27,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:27,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:23:27,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:27,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:23:27,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:27,027 INFO L87 Difference]: Start difference. First operand 80196 states and 128439 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:23:35,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:35,881 INFO L93 Difference]: Finished difference Result 237691 states and 389065 transitions. [2022-12-14 11:23:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:23:35,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 110 [2022-12-14 11:23:35,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:36,594 INFO L225 Difference]: With dead ends: 237691 [2022-12-14 11:23:36,594 INFO L226 Difference]: Without dead ends: 157539 [2022-12-14 11:23:36,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:36,882 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 537 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:36,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1212 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:23:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157539 states. [2022-12-14 11:23:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157539 to 157257. [2022-12-14 11:23:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157257 states, 113330 states have (on average 1.5136680490602665) internal successors, (171544), 119767 states have internal predecessors, (171544), 32075 states have call successors, (32075), 8951 states have call predecessors, (32075), 11851 states have return successors, (53032), 30344 states have call predecessors, (53032), 32070 states have call successors, (53032) [2022-12-14 11:23:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157257 states to 157257 states and 256651 transitions. [2022-12-14 11:23:46,981 INFO L78 Accepts]: Start accepts. Automaton has 157257 states and 256651 transitions. Word has length 110 [2022-12-14 11:23:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:46,981 INFO L495 AbstractCegarLoop]: Abstraction has 157257 states and 256651 transitions. [2022-12-14 11:23:46,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:23:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 157257 states and 256651 transitions. [2022-12-14 11:23:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 11:23:46,983 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:46,983 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:23:46,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 11:23:46,984 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:23:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2099503971, now seen corresponding path program 1 times [2022-12-14 11:23:46,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:46,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242458193] [2022-12-14 11:23:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:46,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:23:47,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:47,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242458193] [2022-12-14 11:23:47,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242458193] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:23:47,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:23:47,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:23:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799041147] [2022-12-14 11:23:47,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:23:47,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:23:47,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:23:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:23:47,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:47,058 INFO L87 Difference]: Start difference. First operand 157257 states and 256651 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:23:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:55,322 INFO L93 Difference]: Finished difference Result 167194 states and 274337 transitions. [2022-12-14 11:23:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:23:55,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 112 [2022-12-14 11:23:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:56,034 INFO L225 Difference]: With dead ends: 167194 [2022-12-14 11:23:56,034 INFO L226 Difference]: Without dead ends: 167183 [2022-12-14 11:23:56,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:23:56,146 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 523 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:56,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1210 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:23:56,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167183 states. [2022-12-14 11:24:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167183 to 166174. [2022-12-14 11:24:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166174 states, 119711 states have (on average 1.5119746723358756) internal successors, (181000), 126550 states have internal predecessors, (181000), 33918 states have call successors, (33918), 9467 states have call predecessors, (33918), 12544 states have return successors, (57695), 32067 states have call predecessors, (57695), 33913 states have call successors, (57695) [2022-12-14 11:24:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166174 states to 166174 states and 272613 transitions. [2022-12-14 11:24:07,041 INFO L78 Accepts]: Start accepts. Automaton has 166174 states and 272613 transitions. Word has length 112 [2022-12-14 11:24:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:24:07,042 INFO L495 AbstractCegarLoop]: Abstraction has 166174 states and 272613 transitions. [2022-12-14 11:24:07,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:24:07,042 INFO L276 IsEmpty]: Start isEmpty. Operand 166174 states and 272613 transitions. [2022-12-14 11:24:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 11:24:07,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:24:07,047 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:24:07,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 11:24:07,048 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:24:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:24:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash -496014300, now seen corresponding path program 1 times [2022-12-14 11:24:07,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:24:07,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564916644] [2022-12-14 11:24:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:24:07,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:24:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:24:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:24:07,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:24:07,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564916644] [2022-12-14 11:24:07,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564916644] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:24:07,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512294336] [2022-12-14 11:24:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:24:07,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:24:07,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:24:07,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:24:07,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:24:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:24:07,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 2105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:24:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:24:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 11:24:07,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:24:07,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512294336] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:24:07,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:24:07,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-12-14 11:24:07,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981822834] [2022-12-14 11:24:07,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:24:07,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:24:07,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:24:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:24:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:24:07,662 INFO L87 Difference]: Start difference. First operand 166174 states and 272613 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 11:24:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:24:17,821 INFO L93 Difference]: Finished difference Result 342467 states and 575034 transitions. [2022-12-14 11:24:17,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:24:17,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 154 [2022-12-14 11:24:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:24:18,715 INFO L225 Difference]: With dead ends: 342467 [2022-12-14 11:24:18,715 INFO L226 Difference]: Without dead ends: 176314 [2022-12-14 11:24:19,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:24:19,255 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 213 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:24:19,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1416 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:24:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176314 states. [2022-12-14 11:24:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176314 to 176314. [2022-12-14 11:24:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176314 states, 129591 states have (on average 1.543162719633308) internal successors, (199980), 136430 states have internal predecessors, (199980), 33918 states have call successors, (33918), 9727 states have call predecessors, (33918), 12804 states have return successors, (57695), 32067 states have call predecessors, (57695), 33913 states have call successors, (57695) [2022-12-14 11:24:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176314 states to 176314 states and 291593 transitions. [2022-12-14 11:24:30,555 INFO L78 Accepts]: Start accepts. Automaton has 176314 states and 291593 transitions. Word has length 154 [2022-12-14 11:24:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:24:30,555 INFO L495 AbstractCegarLoop]: Abstraction has 176314 states and 291593 transitions. [2022-12-14 11:24:30,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 11:24:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 176314 states and 291593 transitions. [2022-12-14 11:24:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 11:24:30,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:24:30,562 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:24:30,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:24:30,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:24:30,763 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:24:30,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:24:30,764 INFO L85 PathProgramCache]: Analyzing trace with hash 487428867, now seen corresponding path program 1 times [2022-12-14 11:24:30,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:24:30,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844845186] [2022-12-14 11:24:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:24:30,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:24:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:24:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 11:24:30,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:24:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844845186] [2022-12-14 11:24:30,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844845186] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:24:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137391792] [2022-12-14 11:24:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:24:30,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:24:30,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:24:30,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:24:30,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:24:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:24:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 2110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:24:31,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:24:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 11:24:31,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:24:31,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137391792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:24:31,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:24:31,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 11:24:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231059594] [2022-12-14 11:24:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:24:31,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:24:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:24:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:24:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:24:31,169 INFO L87 Difference]: Start difference. First operand 176314 states and 291593 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 11:24:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:24:41,901 INFO L93 Difference]: Finished difference Result 362747 states and 612273 transitions. [2022-12-14 11:24:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:24:41,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 159 [2022-12-14 11:24:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:24:42,725 INFO L225 Difference]: With dead ends: 362747 [2022-12-14 11:24:42,725 INFO L226 Difference]: Without dead ends: 186454 [2022-12-14 11:24:43,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:24:43,479 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 211 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:24:43,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1416 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:24:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186454 states. [2022-12-14 11:24:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186454 to 186454. [2022-12-14 11:24:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186454 states, 139471 states have (on average 1.5699321005800488) internal successors, (218960), 146310 states have internal predecessors, (218960), 33918 states have call successors, (33918), 9987 states have call predecessors, (33918), 13064 states have return successors, (57695), 32067 states have call predecessors, (57695), 33913 states have call successors, (57695) [2022-12-14 11:24:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186454 states to 186454 states and 310573 transitions. [2022-12-14 11:24:54,659 INFO L78 Accepts]: Start accepts. Automaton has 186454 states and 310573 transitions. Word has length 159 [2022-12-14 11:24:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:24:54,659 INFO L495 AbstractCegarLoop]: Abstraction has 186454 states and 310573 transitions. [2022-12-14 11:24:54,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 11:24:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 186454 states and 310573 transitions. [2022-12-14 11:24:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 11:24:54,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:24:54,666 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:24:54,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:24:54,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:24:54,868 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:24:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:24:54,869 INFO L85 PathProgramCache]: Analyzing trace with hash -902888261, now seen corresponding path program 1 times [2022-12-14 11:24:54,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:24:54,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770420430] [2022-12-14 11:24:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:24:54,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:24:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:24:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 11:24:57,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:24:57,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770420430] [2022-12-14 11:24:57,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770420430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:24:57,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361965617] [2022-12-14 11:24:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:24:57,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:24:57,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:24:57,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:24:57,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:24:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:24:57,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:24:57,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:24:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:24:57,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:24:57,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361965617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:24:57,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:24:57,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [30] total 32 [2022-12-14 11:24:57,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257596892] [2022-12-14 11:24:57,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:24:57,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:24:57,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:24:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:24:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2022-12-14 11:24:57,280 INFO L87 Difference]: Start difference. First operand 186454 states and 310573 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 11:25:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:25:07,517 INFO L93 Difference]: Finished difference Result 383027 states and 649512 transitions. [2022-12-14 11:25:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:25:07,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 163 [2022-12-14 11:25:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:25:08,485 INFO L225 Difference]: With dead ends: 383027 [2022-12-14 11:25:08,486 INFO L226 Difference]: Without dead ends: 196594 [2022-12-14 11:25:09,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 11:25:09,056 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 209 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:25:09,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1416 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:25:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196594 states. [2022-12-14 11:25:19,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196594 to 196594. [2022-12-14 11:25:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196594 states, 149351 states have (on average 1.5931597377988764) internal successors, (237940), 156190 states have internal predecessors, (237940), 33918 states have call successors, (33918), 10247 states have call predecessors, (33918), 13324 states have return successors, (57695), 32067 states have call predecessors, (57695), 33913 states have call successors, (57695) [2022-12-14 11:25:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196594 states to 196594 states and 329553 transitions. [2022-12-14 11:25:20,520 INFO L78 Accepts]: Start accepts. Automaton has 196594 states and 329553 transitions. Word has length 163 [2022-12-14 11:25:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:25:20,521 INFO L495 AbstractCegarLoop]: Abstraction has 196594 states and 329553 transitions. [2022-12-14 11:25:20,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 11:25:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 196594 states and 329553 transitions. [2022-12-14 11:25:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 11:25:20,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:25:20,527 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:25:20,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:25:20,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 11:25:20,729 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:25:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:25:20,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2018096860, now seen corresponding path program 1 times [2022-12-14 11:25:20,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:25:20,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819298374] [2022-12-14 11:25:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:25:20,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:25:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:25:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 11:25:22,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:25:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819298374] [2022-12-14 11:25:22,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819298374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:25:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026740260] [2022-12-14 11:25:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:25:22,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:25:22,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:25:22,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:25:22,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:25:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:25:22,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:25:22,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:25:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 11:25:22,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:25:22,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026740260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:25:22,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:25:22,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [30] total 32 [2022-12-14 11:25:22,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654537603] [2022-12-14 11:25:22,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:25:22,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:25:22,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:25:22,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:25:22,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2022-12-14 11:25:22,931 INFO L87 Difference]: Start difference. First operand 196594 states and 329553 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 11:25:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:25:33,511 INFO L93 Difference]: Finished difference Result 403307 states and 686751 transitions. [2022-12-14 11:25:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:25:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 166 [2022-12-14 11:25:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:25:34,433 INFO L225 Difference]: With dead ends: 403307 [2022-12-14 11:25:34,433 INFO L226 Difference]: Without dead ends: 206734 [2022-12-14 11:25:35,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 11:25:35,130 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 207 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:25:35,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1416 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:25:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206734 states. [2022-12-14 11:25:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206734 to 206734. [2022-12-14 11:25:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206734 states, 159231 states have (on average 1.6135049079639014) internal successors, (256920), 166070 states have internal predecessors, (256920), 33918 states have call successors, (33918), 10507 states have call predecessors, (33918), 13584 states have return successors, (57695), 32067 states have call predecessors, (57695), 33913 states have call successors, (57695) [2022-12-14 11:25:46,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206734 states to 206734 states and 348533 transitions. [2022-12-14 11:25:46,745 INFO L78 Accepts]: Start accepts. Automaton has 206734 states and 348533 transitions. Word has length 166 [2022-12-14 11:25:46,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:25:46,746 INFO L495 AbstractCegarLoop]: Abstraction has 206734 states and 348533 transitions. [2022-12-14 11:25:46,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 11:25:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 206734 states and 348533 transitions. [2022-12-14 11:25:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 11:25:46,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:25:46,753 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:25:46,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 11:25:46,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 11:25:46,954 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:25:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:25:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1107829938, now seen corresponding path program 1 times [2022-12-14 11:25:46,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:25:46,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310365861] [2022-12-14 11:25:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:25:46,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:25:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:25:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 11:25:48,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:25:48,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310365861] [2022-12-14 11:25:48,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310365861] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:25:48,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777971844] [2022-12-14 11:25:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:25:48,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:25:48,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:25:48,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:25:48,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:25:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:25:49,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 2113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:25:49,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:25:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 11:25:49,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:25:49,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777971844] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:25:49,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:25:49,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [30] total 34 [2022-12-14 11:25:49,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413536870] [2022-12-14 11:25:49,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:25:49,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:25:49,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:25:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:25:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:25:49,299 INFO L87 Difference]: Start difference. First operand 206734 states and 348533 transitions. Second operand has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) [2022-12-14 11:26:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:00,189 INFO L93 Difference]: Finished difference Result 413557 states and 697974 transitions. [2022-12-14 11:26:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:26:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) Word has length 168 [2022-12-14 11:26:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:01,398 INFO L225 Difference]: With dead ends: 413557 [2022-12-14 11:26:01,398 INFO L226 Difference]: Without dead ends: 206890 [2022-12-14 11:26:02,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:26:02,087 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 314 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:02,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 2636 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:26:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206890 states. [2022-12-14 11:26:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206890 to 206724. [2022-12-14 11:26:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206724 states, 159201 states have (on average 1.6107624952104571) internal successors, (256435), 166065 states have internal predecessors, (256435), 33913 states have call successors, (33913), 10507 states have call predecessors, (33913), 13609 states have return successors, (57726), 32062 states have call predecessors, (57726), 33908 states have call successors, (57726) [2022-12-14 11:26:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206724 states to 206724 states and 348074 transitions. [2022-12-14 11:26:13,801 INFO L78 Accepts]: Start accepts. Automaton has 206724 states and 348074 transitions. Word has length 168 [2022-12-14 11:26:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:13,801 INFO L495 AbstractCegarLoop]: Abstraction has 206724 states and 348074 transitions. [2022-12-14 11:26:13,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) [2022-12-14 11:26:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 206724 states and 348074 transitions. [2022-12-14 11:26:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 11:26:13,808 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:13,808 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:13,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:26:14,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 11:26:14,010 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:14,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1178224147, now seen corresponding path program 1 times [2022-12-14 11:26:14,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:14,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454020195] [2022-12-14 11:26:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:14,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 11:26:15,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:15,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454020195] [2022-12-14 11:26:15,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454020195] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:26:15,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154840986] [2022-12-14 11:26:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:15,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:15,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:15,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:15,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:26:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:16,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:26:16,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 11:26:16,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:26:16,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154840986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:16,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:26:16,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [30] total 32 [2022-12-14 11:26:16,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259556096] [2022-12-14 11:26:16,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:16,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:26:16,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:16,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:26:16,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2022-12-14 11:26:16,185 INFO L87 Difference]: Start difference. First operand 206724 states and 348074 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2022-12-14 11:26:25,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:25,764 INFO L93 Difference]: Finished difference Result 208729 states and 355418 transitions. [2022-12-14 11:26:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:26:25,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 171 [2022-12-14 11:26:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:26,689 INFO L225 Difference]: With dead ends: 208729 [2022-12-14 11:26:26,689 INFO L226 Difference]: Without dead ends: 208643 [2022-12-14 11:26:26,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 11:26:26,915 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 47 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:26,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1693 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:26:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208643 states. [2022-12-14 11:26:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208643 to 206916. [2022-12-14 11:26:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206916 states, 159393 states have (on average 1.6089226001141832) internal successors, (256451), 166257 states have internal predecessors, (256451), 33913 states have call successors, (33913), 10507 states have call predecessors, (33913), 13609 states have return successors, (57726), 32062 states have call predecessors, (57726), 33908 states have call successors, (57726) [2022-12-14 11:26:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206916 states to 206916 states and 348090 transitions. [2022-12-14 11:26:40,134 INFO L78 Accepts]: Start accepts. Automaton has 206916 states and 348090 transitions. Word has length 171 [2022-12-14 11:26:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:40,134 INFO L495 AbstractCegarLoop]: Abstraction has 206916 states and 348090 transitions. [2022-12-14 11:26:40,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2022-12-14 11:26:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 206916 states and 348090 transitions. [2022-12-14 11:26:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-12-14 11:26:40,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:40,142 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 11:26:40,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:26:40,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:40,344 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash 564922472, now seen corresponding path program 1 times [2022-12-14 11:26:40,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002036139] [2022-12-14 11:26:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:40,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-12-14 11:26:40,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:40,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002036139] [2022-12-14 11:26:40,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002036139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:26:40,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835312508] [2022-12-14 11:26:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:40,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:40,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:40,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:40,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:26:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:41,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:26:41,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-12-14 11:26:41,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-12-14 11:26:41,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835312508] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:41,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1260803058] [2022-12-14 11:26:41,738 INFO L159 IcfgInterpreter]: Started Sifa with 137 locations of interest [2022-12-14 11:26:41,738 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:41,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:41,747 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:41,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:49,006 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 420 for LOIs [2022-12-14 11:26:49,064 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 596 for LOIs [2022-12-14 11:29:07,964 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 104 for LOIs [2022-12-14 11:29:09,020 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 54 for LOIs [2022-12-14 11:29:09,028 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 196 for LOIs [2022-12-14 11:29:10,516 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 79 for LOIs [2022-12-14 11:29:10,532 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 68 for LOIs [2022-12-14 11:29:10,677 INFO L197 IcfgInterpreter]: Interpreting procedure enterElevator with input of size 64 for LOIs [2022-12-14 11:29:10,851 INFO L197 IcfgInterpreter]: Interpreting procedure pressInLiftFloorButton with input of size 77 for LOIs [2022-12-14 11:29:10,873 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 23 for LOIs [2022-12-14 11:29:10,875 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2022-12-14 11:29:14,116 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 591 for LOIs [2022-12-14 11:29:14,686 INFO L197 IcfgInterpreter]: Interpreting procedure isEmpty with input of size 29 for LOIs [2022-12-14 11:29:14,695 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 31 for LOIs [2022-12-14 11:29:14,697 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 50 for LOIs [2022-12-14 11:29:14,707 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 49 for LOIs [2022-12-14 11:29:14,718 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 519 for LOIs [2022-12-14 11:29:14,861 INFO L197 IcfgInterpreter]: Interpreting procedure removePersonFromFloor with input of size 156 for LOIs [2022-12-14 11:29:15,736 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 64 for LOIs [2022-12-14 11:29:15,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:30:26,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6156998#(and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 34) 2) 105) (= 32 (select (select |#memory_int| 34) 0)) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (= (select |#valid| 33) 1) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (<= ~currentFloorID~0 2147483647) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= ~head~0.offset 0) (= (select (select |#memory_int| 32) 3) 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select |#valid| 18) 1) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 37) 9) (not (= 0 ~floorButtons_spc9_1~0)) (= 97 (select (select |#memory_int| 19) 1)) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= ~doorState~0 1) (= 0 ~floorButtons_spc9_0~0) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= 4 (select |#length| 18)) (= ~head~0.base 0) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= ~blocked~0 0) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= 112 (select (select |#memory_int| 30) 3)) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 36) 0) 10) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select (select |#memory_int| 35) 2) 105) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 32) 0)))' at error location [2022-12-14 11:30:26,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:30:26,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:30:26,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 17 [2022-12-14 11:30:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177251456] [2022-12-14 11:30:26,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:26,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:30:26,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:30:26,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1145, Invalid=14355, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 11:30:26,364 INFO L87 Difference]: Start difference. First operand 206916 states and 348090 transitions. Second operand has 17 states, 17 states have (on average 14.823529411764707) internal successors, (252), 17 states have internal predecessors, (252), 10 states have call successors, (73), 4 states have call predecessors, (73), 6 states have return successors, (72), 10 states have call predecessors, (72), 9 states have call successors, (72) [2022-12-14 11:30:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:49,175 INFO L93 Difference]: Finished difference Result 504664 states and 934989 transitions. [2022-12-14 11:30:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 11:30:49,177 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 14.823529411764707) internal successors, (252), 17 states have internal predecessors, (252), 10 states have call successors, (73), 4 states have call predecessors, (73), 6 states have return successors, (72), 10 states have call predecessors, (72), 9 states have call successors, (72) Word has length 280 [2022-12-14 11:30:49,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:51,000 INFO L225 Difference]: With dead ends: 504664 [2022-12-14 11:30:51,000 INFO L226 Difference]: Without dead ends: 289293 [2022-12-14 11:30:51,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 732 SyntacticMatches, 7 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9406 ImplicationChecksByTransitivity, 71.6s TimeCoverageRelationStatistics Valid=1463, Invalid=21187, Unknown=0, NotChecked=0, Total=22650 [2022-12-14 11:30:51,828 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 3403 mSDsluCounter, 2735 mSDsCounter, 0 mSdLazyCounter, 8357 mSolverCounterSat, 1895 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3410 SdHoareTripleChecker+Valid, 3127 SdHoareTripleChecker+Invalid, 10252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1895 IncrementalHoareTripleChecker+Valid, 8357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:51,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3410 Valid, 3127 Invalid, 10252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1895 Valid, 8357 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 11:30:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289293 states. [2022-12-14 11:31:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289293 to 275570. [2022-12-14 11:31:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275570 states, 211234 states have (on average 1.5765075698041036) internal successors, (333012), 221651 states have internal predecessors, (333012), 45978 states have call successors, (45978), 13075 states have call predecessors, (45978), 18357 states have return successors, (105555), 42862 states have call predecessors, (105555), 45973 states have call successors, (105555) [2022-12-14 11:31:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275570 states to 275570 states and 484545 transitions. [2022-12-14 11:31:10,250 INFO L78 Accepts]: Start accepts. Automaton has 275570 states and 484545 transitions. Word has length 280 [2022-12-14 11:31:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:10,250 INFO L495 AbstractCegarLoop]: Abstraction has 275570 states and 484545 transitions. [2022-12-14 11:31:10,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.823529411764707) internal successors, (252), 17 states have internal predecessors, (252), 10 states have call successors, (73), 4 states have call predecessors, (73), 6 states have return successors, (72), 10 states have call predecessors, (72), 9 states have call successors, (72) [2022-12-14 11:31:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 275570 states and 484545 transitions. [2022-12-14 11:31:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-14 11:31:10,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:10,267 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:10,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:31:10,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 11:31:10,469 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash 877179398, now seen corresponding path program 1 times [2022-12-14 11:31:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:10,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430898544] [2022-12-14 11:31:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:10,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 11:31:12,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:12,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430898544] [2022-12-14 11:31:12,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430898544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:31:12,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242544038] [2022-12-14 11:31:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:12,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:12,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:12,384 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:12,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:31:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2189 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:31:12,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 11:31:12,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:31:12,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242544038] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:31:12,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:31:12,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [30] total 32 [2022-12-14 11:31:12,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349728372] [2022-12-14 11:31:12,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:31:12,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:31:12,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:12,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:31:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2022-12-14 11:31:12,667 INFO L87 Difference]: Start difference. First operand 275570 states and 484545 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 11:31:28,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:28,702 INFO L93 Difference]: Finished difference Result 567238 states and 1018634 transitions. [2022-12-14 11:31:28,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:31:28,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 194 [2022-12-14 11:31:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:30,357 INFO L225 Difference]: With dead ends: 567238 [2022-12-14 11:31:30,358 INFO L226 Difference]: Without dead ends: 291742 [2022-12-14 11:31:31,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 11:31:31,573 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 205 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:31,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1416 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:31:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291742 states. [2022-12-14 11:31:47,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291742 to 291742. [2022-12-14 11:31:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291742 states, 226730 states have (on average 1.592607947779297) internal successors, (361092), 237355 states have internal predecessors, (361092), 45978 states have call successors, (45978), 13543 states have call predecessors, (45978), 19033 states have return successors, (105555), 42862 states have call predecessors, (105555), 45973 states have call successors, (105555) [2022-12-14 11:31:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291742 states to 291742 states and 512625 transitions. [2022-12-14 11:31:49,516 INFO L78 Accepts]: Start accepts. Automaton has 291742 states and 512625 transitions. Word has length 194 [2022-12-14 11:31:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:49,516 INFO L495 AbstractCegarLoop]: Abstraction has 291742 states and 512625 transitions. [2022-12-14 11:31:49,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 11:31:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 291742 states and 512625 transitions. [2022-12-14 11:31:49,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 11:31:49,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:49,532 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:49,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 11:31:49,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 11:31:49,734 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1448588827, now seen corresponding path program 1 times [2022-12-14 11:31:49,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:49,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260197486] [2022-12-14 11:31:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:49,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 11:31:51,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260197486] [2022-12-14 11:31:51,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260197486] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:31:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731250504] [2022-12-14 11:31:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:51,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:51,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:51,663 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:51,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0073dad-c191-4973-ade6-7dfb8c4ebfdf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:31:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 11:31:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-12-14 11:31:52,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:54,706 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 11:32:00,939 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 11:32:01,223 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 11:32:08,254 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 11:32:08,341 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time...