./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:39:41,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:39:41,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:39:41,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:39:41,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:39:41,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:39:41,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:39:41,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:39:41,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:39:41,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:39:41,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:39:41,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:39:41,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:39:41,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:39:41,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:39:41,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:39:41,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:39:41,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:39:41,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:39:41,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:39:41,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:39:41,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:39:41,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:39:41,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:39:41,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:39:41,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:39:41,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:39:41,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:39:41,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:39:41,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:39:41,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:39:41,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:39:41,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:39:41,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:39:41,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:39:41,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:39:41,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:39:41,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:39:41,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:39:41,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:39:41,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:39:41,175 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:39:41,212 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:39:41,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:39:41,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:39:41,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:39:41,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:39:41,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:39:41,214 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:39:41,214 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:39:41,214 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:39:41,215 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:39:41,216 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:39:41,216 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:39:41,216 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:39:41,216 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:39:41,216 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:39:41,217 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:39:41,217 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:39:41,217 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:39:41,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:39:41,218 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:39:41,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:39:41,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:39:41,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:39:41,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:39:41,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:39:41,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:39:41,220 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:39:41,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:39:41,220 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:39:41,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:39:41,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:39:41,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:39:41,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:39:41,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:39:41,221 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:39:41,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:39:41,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:39:41,222 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:39:41,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:39:41,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:39:41,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:39:41,223 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_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2022-11-20 20:39:41,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:39:41,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:39:41,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:39:41,545 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:39:41,546 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:39:41,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2022-11-20 20:39:44,595 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:39:45,006 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:39:45,007 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2022-11-20 20:39:45,025 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/data/272a622f9/775db51ae97343918f924e219f611aa3/FLAGf4c3190a6 [2022-11-20 20:39:45,040 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/data/272a622f9/775db51ae97343918f924e219f611aa3 [2022-11-20 20:39:45,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:39:45,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:39:45,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:39:45,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:39:45,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:39:45,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:45,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657f761e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45, skipping insertion in model container [2022-11-20 20:39:45,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:45,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:39:45,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:39:45,571 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_074f66bd-c831-4a23-81ed-3384ab1d6b27/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2022-11-20 20:39:45,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:39:45,714 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:39:45,814 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_074f66bd-c831-4a23-81ed-3384ab1d6b27/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2022-11-20 20:39:45,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:39:45,899 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:39:45,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45 WrapperNode [2022-11-20 20:39:45,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:39:45,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:39:45,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:39:45,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:39:45,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:45,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:46,017 INFO L138 Inliner]: procedures = 97, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1178 [2022-11-20 20:39:46,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:39:46,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:39:46,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:39:46,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:39:46,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:46,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:46,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:46,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:46,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:46,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:46,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:46,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:46,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:39:46,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:39:46,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:39:46,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:39:46,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (1/1) ... [2022-11-20 20:39:46,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:39:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:39:46,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:39:46,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_074f66bd-c831-4a23-81ed-3384ab1d6b27/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:39:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-20 20:39:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-20 20:39:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-20 20:39:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-20 20:39:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-20 20:39:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-20 20:39:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-20 20:39:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-20 20:39:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-20 20:39:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-20 20:39:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-20 20:39:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-20 20:39:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-20 20:39:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-20 20:39:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-20 20:39:46,221 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-20 20:39:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-20 20:39:46,221 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-20 20:39:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:39:46,222 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-20 20:39:46,222 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-20 20:39:46,222 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-20 20:39:46,223 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-20 20:39:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-20 20:39:46,223 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-20 20:39:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 20:39:46,225 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 20:39:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-20 20:39:46,225 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-20 20:39:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-20 20:39:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-20 20:39:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-20 20:39:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-20 20:39:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-20 20:39:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-20 20:39:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-20 20:39:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-20 20:39:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-20 20:39:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-20 20:39:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-20 20:39:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-20 20:39:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-20 20:39:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-20 20:39:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-20 20:39:46,231 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-20 20:39:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:39:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-20 20:39:46,232 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-20 20:39:46,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:39:46,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:39:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-20 20:39:46,234 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-20 20:39:46,235 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-20 20:39:46,235 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-20 20:39:46,474 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:39:46,477 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:39:47,550 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:39:48,408 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:39:48,408 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:39:48,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:39:48 BoogieIcfgContainer [2022-11-20 20:39:48,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:39:48,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:39:48,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:39:48,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:39:48,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:39:45" (1/3) ... [2022-11-20 20:39:48,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26648e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:39:48, skipping insertion in model container [2022-11-20 20:39:48,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:45" (2/3) ... [2022-11-20 20:39:48,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26648e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:39:48, skipping insertion in model container [2022-11-20 20:39:48,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:39:48" (3/3) ... [2022-11-20 20:39:48,425 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product28.cil.c [2022-11-20 20:39:48,445 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:39:48,445 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:39:48,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:39:48,534 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;@1ffdeba3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:39:48,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:39:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-20 20:39:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 20:39:48,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:39:48,561 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] [2022-11-20 20:39:48,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:39:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:39:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1587334211, now seen corresponding path program 1 times [2022-11-20 20:39:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:39:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215613518] [2022-11-20 20:39:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:39:48,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:39:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:39:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:49,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:39:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215613518] [2022-11-20 20:39:49,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215613518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:39:49,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:39:49,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:39:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845741801] [2022-11-20 20:39:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:39:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:39:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:39:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:39:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:39:49,110 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-20 20:39:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:39:49,308 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2022-11-20 20:39:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:39:49,311 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-11-20 20:39:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:39:49,326 INFO L225 Difference]: With dead ends: 401 [2022-11-20 20:39:49,327 INFO L226 Difference]: Without dead ends: 379 [2022-11-20 20:39:49,330 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 [2022-11-20 20:39:49,333 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:39:49,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:39:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-20 20:39:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-11-20 20:39:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 255 states have (on average 1.580392156862745) internal successors, (403), 276 states have internal predecessors, (403), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-20 20:39:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2022-11-20 20:39:49,430 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2022-11-20 20:39:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:39:49,431 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2022-11-20 20:39:49,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-20 20:39:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2022-11-20 20:39:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 20:39:49,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:39:49,435 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] [2022-11-20 20:39:49,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:39:49,436 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:39:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:39:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1461820053, now seen corresponding path program 1 times [2022-11-20 20:39:49,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:39:49,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860639847] [2022-11-20 20:39:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:39:49,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:39:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:39:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:50,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:39:50,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860639847] [2022-11-20 20:39:50,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860639847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:39:50,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:39:50,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:39:50,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933554214] [2022-11-20 20:39:50,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:39:50,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:39:50,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:39:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:39:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:39:50,067 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 20:39:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:39:52,658 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2022-11-20 20:39:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:39:52,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-11-20 20:39:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:39:52,674 INFO L225 Difference]: With dead ends: 1243 [2022-11-20 20:39:52,675 INFO L226 Difference]: Without dead ends: 880 [2022-11-20 20:39:52,686 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 [2022-11-20 20:39:52,689 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1226 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:39:52,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 1119 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 20:39:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-20 20:39:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2022-11-20 20:39:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 556 states have (on average 1.6025179856115108) internal successors, (891), 586 states have internal predecessors, (891), 192 states have call successors, (192), 43 states have call predecessors, (192), 44 states have return successors, (194), 176 states have call predecessors, (194), 187 states have call successors, (194) [2022-11-20 20:39:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2022-11-20 20:39:52,792 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2022-11-20 20:39:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:39:52,792 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2022-11-20 20:39:52,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 20:39:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2022-11-20 20:39:52,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 20:39:52,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:39:52,800 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:39:52,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:39:52,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:39:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:39:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1378588201, now seen corresponding path program 1 times [2022-11-20 20:39:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:39:52,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170056385] [2022-11-20 20:39:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:39:52,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:39:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:39:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:39:53,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:39:53,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170056385] [2022-11-20 20:39:53,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170056385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:39:53,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:39:53,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:39:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92098634] [2022-11-20 20:39:53,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:39:53,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:39:53,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:39:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:39:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:39:53,291 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 20:39:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:39:56,958 INFO L93 Difference]: Finished difference Result 2747 states and 4462 transitions. [2022-11-20 20:39:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:39:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-11-20 20:39:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:39:56,973 INFO L225 Difference]: With dead ends: 2747 [2022-11-20 20:39:56,973 INFO L226 Difference]: Without dead ends: 1970 [2022-11-20 20:39:56,979 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 [2022-11-20 20:39:56,980 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 1360 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4435 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 5134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 4435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:39:56,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 2160 Invalid, 5134 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [699 Valid, 4435 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-20 20:39:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-11-20 20:39:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1783. [2022-11-20 20:39:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1211 states have (on average 1.5730800990916598) internal successors, (1905), 1283 states have internal predecessors, (1905), 479 states have call successors, (479), 80 states have call predecessors, (479), 92 states have return successors, (498), 452 states have call predecessors, (498), 474 states have call successors, (498) [2022-11-20 20:39:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2882 transitions. [2022-11-20 20:39:57,128 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2882 transitions. Word has length 87 [2022-11-20 20:39:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:39:57,129 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2882 transitions. [2022-11-20 20:39:57,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 20:39:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2882 transitions. [2022-11-20 20:39:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 20:39:57,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:39:57,133 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:39:57,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:39:57,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:39:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:39:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1652019250, now seen corresponding path program 1 times [2022-11-20 20:39:57,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:39:57,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253223460] [2022-11-20 20:39:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:39:57,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:39:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:39:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:39:57,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:39:57,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253223460] [2022-11-20 20:39:57,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253223460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:39:57,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:39:57,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:39:57,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223990675] [2022-11-20 20:39:57,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:39:57,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:39:57,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:39:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:39:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:39:57,563 INFO L87 Difference]: Start difference. First operand 1783 states and 2882 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 20:40:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:40:00,025 INFO L93 Difference]: Finished difference Result 4518 states and 7313 transitions. [2022-11-20 20:40:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:40:00,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2022-11-20 20:40:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:40:00,071 INFO L225 Difference]: With dead ends: 4518 [2022-11-20 20:40:00,073 INFO L226 Difference]: Without dead ends: 2753 [2022-11-20 20:40:00,082 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 [2022-11-20 20:40:00,090 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 1158 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:40:00,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 1659 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 20:40:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2022-11-20 20:40:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2635. [2022-11-20 20:40:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1815 states have (on average 1.5801652892561984) internal successors, (2868), 1914 states have internal predecessors, (2868), 669 states have call successors, (669), 130 states have call predecessors, (669), 150 states have return successors, (716), 634 states have call predecessors, (716), 664 states have call successors, (716) [2022-11-20 20:40:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4253 transitions. [2022-11-20 20:40:00,297 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4253 transitions. Word has length 88 [2022-11-20 20:40:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:40:00,298 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4253 transitions. [2022-11-20 20:40:00,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 20:40:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4253 transitions. [2022-11-20 20:40:00,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 20:40:00,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:40:00,302 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:40:00,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:40:00,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:40:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:40:00,303 INFO L85 PathProgramCache]: Analyzing trace with hash 762048878, now seen corresponding path program 1 times [2022-11-20 20:40:00,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:40:00,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581015631] [2022-11-20 20:40:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:40:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:40:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:40:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:40:00,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:40:00,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581015631] [2022-11-20 20:40:00,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581015631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:40:00,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:40:00,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:40:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958445456] [2022-11-20 20:40:00,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:40:00,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:40:00,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:40:00,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:40:00,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:40:00,615 INFO L87 Difference]: Start difference. First operand 2635 states and 4253 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 20:40:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:40:01,238 INFO L93 Difference]: Finished difference Result 2736 states and 4419 transitions. [2022-11-20 20:40:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:40:01,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-11-20 20:40:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:40:01,258 INFO L225 Difference]: With dead ends: 2736 [2022-11-20 20:40:01,258 INFO L226 Difference]: Without dead ends: 2721 [2022-11-20 20:40:01,261 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 [2022-11-20 20:40:01,264 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 690 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:40:01,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1484 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:40:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2022-11-20 20:40:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2641. [2022-11-20 20:40:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 1821 states have (on average 1.5782537067545306) internal successors, (2874), 1920 states have internal predecessors, (2874), 669 states have call successors, (669), 130 states have call predecessors, (669), 150 states have return successors, (716), 634 states have call predecessors, (716), 664 states have call successors, (716) [2022-11-20 20:40:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4259 transitions. [2022-11-20 20:40:01,496 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4259 transitions. Word has length 92 [2022-11-20 20:40:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:40:01,499 INFO L495 AbstractCegarLoop]: Abstraction has 2641 states and 4259 transitions. [2022-11-20 20:40:01,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 20:40:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4259 transitions. [2022-11-20 20:40:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-20 20:40:01,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:40:01,502 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:40:01,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:40:01,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:40:01,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:40:01,503 INFO L85 PathProgramCache]: Analyzing trace with hash -432487050, now seen corresponding path program 1 times [2022-11-20 20:40:01,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:40:01,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463082123] [2022-11-20 20:40:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:40:01,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:40:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:40:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:40:02,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:40:02,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463082123] [2022-11-20 20:40:02,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463082123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:40:02,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:40:02,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 20:40:02,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122086721] [2022-11-20 20:40:02,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:40:02,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:40:02,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:40:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:40:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:40:02,073 INFO L87 Difference]: Start difference. First operand 2641 states and 4259 transitions. Second operand has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-20 20:40:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:40:08,628 INFO L93 Difference]: Finished difference Result 3066 states and 4901 transitions. [2022-11-20 20:40:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 20:40:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2022-11-20 20:40:08,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:40:08,646 INFO L225 Difference]: With dead ends: 3066 [2022-11-20 20:40:08,647 INFO L226 Difference]: Without dead ends: 3049 [2022-11-20 20:40:08,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 20:40:08,651 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 2659 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 8740 mSolverCounterSat, 1566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2685 SdHoareTripleChecker+Valid, 3963 SdHoareTripleChecker+Invalid, 10306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1566 IncrementalHoareTripleChecker+Valid, 8740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:40:08,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2685 Valid, 3963 Invalid, 10306 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1566 Valid, 8740 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-20 20:40:08,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2022-11-20 20:40:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2829. [2022-11-20 20:40:08,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 1963 states have (on average 1.577687213448803) internal successors, (3097), 2060 states have internal predecessors, (3097), 686 states have call successors, (686), 160 states have call predecessors, (686), 179 states have return successors, (737), 652 states have call predecessors, (737), 681 states have call successors, (737) [2022-11-20 20:40:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 4520 transitions. [2022-11-20 20:40:08,897 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 4520 transitions. Word has length 97 [2022-11-20 20:40:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:40:08,898 INFO L495 AbstractCegarLoop]: Abstraction has 2829 states and 4520 transitions. [2022-11-20 20:40:08,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-20 20:40:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 4520 transitions. [2022-11-20 20:40:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-20 20:40:08,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:40:08,907 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:40:08,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:40:08,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:40:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:40:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash 117736752, now seen corresponding path program 1 times [2022-11-20 20:40:08,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:40:08,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123105287] [2022-11-20 20:40:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:40:08,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:40:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:40:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:40:09,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:40:09,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123105287] [2022-11-20 20:40:09,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123105287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:40:09,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:40:09,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:40:09,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248923019] [2022-11-20 20:40:09,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:40:09,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:40:09,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:40:09,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:40:09,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:40:09,218 INFO L87 Difference]: Start difference. First operand 2829 states and 4520 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-20 20:40:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:40:11,028 INFO L93 Difference]: Finished difference Result 7632 states and 12344 transitions. [2022-11-20 20:40:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:40:11,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2022-11-20 20:40:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:40:11,059 INFO L225 Difference]: With dead ends: 7632 [2022-11-20 20:40:11,059 INFO L226 Difference]: Without dead ends: 4823 [2022-11-20 20:40:11,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:40:11,078 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1170 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:40:11,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 731 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 20:40:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2022-11-20 20:40:11,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 4448. [2022-11-20 20:40:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 3093 states have (on average 1.5716133204009053) internal successors, (4861), 3254 states have internal predecessors, (4861), 1068 states have call successors, (1068), 241 states have call predecessors, (1068), 286 states have return successors, (1199), 1012 states have call predecessors, (1199), 1063 states have call successors, (1199) [2022-11-20 20:40:11,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 7128 transitions. [2022-11-20 20:40:11,569 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 7128 transitions. Word has length 104 [2022-11-20 20:40:11,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:40:11,570 INFO L495 AbstractCegarLoop]: Abstraction has 4448 states and 7128 transitions. [2022-11-20 20:40:11,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-20 20:40:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 7128 transitions. [2022-11-20 20:40:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-20 20:40:11,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:40:11,574 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:40:11,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 20:40:11,575 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:40:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:40:11,575 INFO L85 PathProgramCache]: Analyzing trace with hash -645408902, now seen corresponding path program 1 times [2022-11-20 20:40:11,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:40:11,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140978932] [2022-11-20 20:40:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:40:11,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:40:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:40:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:40:11,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:40:11,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140978932] [2022-11-20 20:40:11,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140978932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:40:11,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:40:11,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:40:11,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026055050] [2022-11-20 20:40:11,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:40:11,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:40:11,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:40:11,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:40:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:40:11,928 INFO L87 Difference]: Start difference. First operand 4448 states and 7128 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-20 20:40:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:40:13,944 INFO L93 Difference]: Finished difference Result 12382 states and 20190 transitions. [2022-11-20 20:40:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:40:13,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2022-11-20 20:40:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:40:14,059 INFO L225 Difference]: With dead ends: 12382 [2022-11-20 20:40:14,060 INFO L226 Difference]: Without dead ends: 7957 [2022-11-20 20:40:14,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:40:14,084 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1157 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:40:14,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 740 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 20:40:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2022-11-20 20:40:14,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 7495. [2022-11-20 20:40:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7495 states, 5225 states have (on average 1.569377990430622) internal successors, (8200), 5527 states have internal predecessors, (8200), 1770 states have call successors, (1770), 403 states have call predecessors, (1770), 499 states have return successors, (2121), 1664 states have call predecessors, (2121), 1765 states have call successors, (2121) [2022-11-20 20:40:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7495 states to 7495 states and 12091 transitions. [2022-11-20 20:40:14,935 INFO L78 Accepts]: Start accepts. Automaton has 7495 states and 12091 transitions. Word has length 105 [2022-11-20 20:40:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:40:14,935 INFO L495 AbstractCegarLoop]: Abstraction has 7495 states and 12091 transitions. [2022-11-20 20:40:14,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-20 20:40:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 7495 states and 12091 transitions. [2022-11-20 20:40:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-20 20:40:14,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:40:14,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:40:14,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:40:14,942 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:40:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:40:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1466883506, now seen corresponding path program 1 times [2022-11-20 20:40:14,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:40:14,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703912980] [2022-11-20 20:40:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:40:14,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:40:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:40:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:40:15,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:40:15,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703912980] [2022-11-20 20:40:15,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703912980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:40:15,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:40:15,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:40:15,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419379819] [2022-11-20 20:40:15,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:40:15,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:40:15,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:40:15,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:40:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:40:15,207 INFO L87 Difference]: Start difference. First operand 7495 states and 12091 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-20 20:40:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:40:17,804 INFO L93 Difference]: Finished difference Result 21659 states and 35934 transitions. [2022-11-20 20:40:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:40:17,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2022-11-20 20:40:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:40:17,893 INFO L225 Difference]: With dead ends: 21659 [2022-11-20 20:40:17,893 INFO L226 Difference]: Without dead ends: 14193 [2022-11-20 20:40:17,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:40:17,938 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1144 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:40:17,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1214 Valid, 749 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 20:40:17,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14193 states. [2022-11-20 20:40:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14193 to 13528. [2022-11-20 20:40:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13528 states, 9436 states have (on average 1.5652818991097923) internal successors, (14770), 10034 states have internal predecessors, (14770), 3152 states have call successors, (3152), 727 states have call predecessors, (3152), 939 states have return successors, (4195), 2946 states have call predecessors, (4195), 3147 states have call successors, (4195) [2022-11-20 20:40:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 22117 transitions. [2022-11-20 20:40:19,503 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 22117 transitions. Word has length 106 [2022-11-20 20:40:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:40:19,504 INFO L495 AbstractCegarLoop]: Abstraction has 13528 states and 22117 transitions. [2022-11-20 20:40:19,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-20 20:40:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 22117 transitions. [2022-11-20 20:40:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-20 20:40:19,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:40:19,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:40:19,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:40:19,508 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:40:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:40:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1771524676, now seen corresponding path program 1 times [2022-11-20 20:40:19,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:40:19,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597801690] [2022-11-20 20:40:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:40:19,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:40:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:40:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:40:19,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:40:19,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597801690] [2022-11-20 20:40:19,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597801690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:40:19,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:40:19,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:40:19,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102127087] [2022-11-20 20:40:19,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:40:19,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:40:19,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:40:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:40:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:40:19,844 INFO L87 Difference]: Start difference. First operand 13528 states and 22117 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-20 20:40:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:40:23,422 INFO L93 Difference]: Finished difference Result 40040 states and 68589 transitions. [2022-11-20 20:40:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:40:23,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2022-11-20 20:40:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:40:23,558 INFO L225 Difference]: With dead ends: 40040 [2022-11-20 20:40:23,559 INFO L226 Difference]: Without dead ends: 26553 [2022-11-20 20:40:23,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:40:23,617 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1131 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:40:23,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 761 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 20:40:23,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26553 states. [2022-11-20 20:40:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26553 to 25453. [2022-11-20 20:40:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25453 states, 17739 states have (on average 1.5597271548565308) internal successors, (27668), 18957 states have internal predecessors, (27668), 5866 states have call successors, (5866), 1375 states have call predecessors, (5866), 1847 states have return successors, (9145), 5460 states have call predecessors, (9145), 5861 states have call successors, (9145) [2022-11-20 20:40:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25453 states to 25453 states and 42679 transitions. [2022-11-20 20:40:26,603 INFO L78 Accepts]: Start accepts. Automaton has 25453 states and 42679 transitions. Word has length 107 [2022-11-20 20:40:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:40:26,604 INFO L495 AbstractCegarLoop]: Abstraction has 25453 states and 42679 transitions. [2022-11-20 20:40:26,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-20 20:40:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 25453 states and 42679 transitions. [2022-11-20 20:40:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-20 20:40:26,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:40:26,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:40:26,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:40:26,609 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:40:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:40:26,610 INFO L85 PathProgramCache]: Analyzing trace with hash 917040692, now seen corresponding path program 1 times [2022-11-20 20:40:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:40:26,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355360390] [2022-11-20 20:40:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:40:26,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:40:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:40:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:40:26,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:40:26,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355360390] [2022-11-20 20:40:26,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355360390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:40:26,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:40:26,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:40:26,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984096618] [2022-11-20 20:40:26,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:40:26,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:40:26,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:40:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:40:26,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:40:26,896 INFO L87 Difference]: Start difference. First operand 25453 states and 42679 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-20 20:40:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:40:32,616 INFO L93 Difference]: Finished difference Result 76578 states and 138763 transitions. [2022-11-20 20:40:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:40:32,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2022-11-20 20:40:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:40:32,923 INFO L225 Difference]: With dead ends: 76578 [2022-11-20 20:40:32,923 INFO L226 Difference]: Without dead ends: 51180 [2022-11-20 20:40:33,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:40:33,244 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1140 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:40:33,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 754 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 20:40:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51180 states. [2022-11-20 20:40:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51180 to 48821. [2022-11-20 20:40:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 34042 states have (on average 1.5571059279713295) internal successors, (53007), 36446 states have internal predecessors, (53007), 11180 states have call successors, (11180), 2661 states have call predecessors, (11180), 3598 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2022-11-20 20:40:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 84970 transitions. [2022-11-20 20:40:39,053 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 84970 transitions. Word has length 108 [2022-11-20 20:40:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:40:39,054 INFO L495 AbstractCegarLoop]: Abstraction has 48821 states and 84970 transitions. [2022-11-20 20:40:39,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-20 20:40:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 84970 transitions. [2022-11-20 20:40:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-20 20:40:39,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:40:39,070 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, 1, 1] [2022-11-20 20:40:39,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:40:39,071 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:40:39,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:40:39,071 INFO L85 PathProgramCache]: Analyzing trace with hash 399502305, now seen corresponding path program 1 times [2022-11-20 20:40:39,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:40:39,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778191261] [2022-11-20 20:40:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:40:39,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:40:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:40:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 20:40:39,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:40:39,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778191261] [2022-11-20 20:40:39,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778191261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:40:39,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:40:39,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:40:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889675484] [2022-11-20 20:40:39,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:40:39,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:40:39,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:40:39,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:40:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:40:39,347 INFO L87 Difference]: Start difference. First operand 48821 states and 84970 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-20 20:40:45,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:40:45,114 INFO L93 Difference]: Finished difference Result 99308 states and 178942 transitions. [2022-11-20 20:40:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:40:45,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 156 [2022-11-20 20:40:45,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:40:45,329 INFO L225 Difference]: With dead ends: 99308 [2022-11-20 20:40:45,330 INFO L226 Difference]: Without dead ends: 50504 [2022-11-20 20:40:45,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:40:45,616 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 30 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:40:45,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1672 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:40:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50504 states.