./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P --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 4d5c55d9a4a2ded389ff7ce077afdc88fb2d2855921e5fd1e3b93fbba7e140e8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:11:45,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:11:45,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:11:46,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:11:46,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:11:46,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:11:46,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:11:46,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:11:46,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:11:46,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:11:46,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:11:46,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:11:46,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:11:46,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:11:46,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:11:46,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:11:46,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:11:46,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:11:46,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:11:46,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:11:46,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:11:46,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:11:46,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:11:46,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:11:46,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:11:46,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:11:46,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:11:46,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:11:46,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:11:46,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:11:46,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:11:46,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:11:46,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:11:46,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:11:46,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:11:46,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:11:46,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:11:46,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:11:46,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:11:46,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:11:46,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:11:46,095 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:11:46,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:11:46,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:11:46,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:11:46,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:11:46,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:11:46,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:11:46,125 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:11:46,132 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:11:46,132 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:11:46,132 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:11:46,132 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:11:46,133 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:11:46,133 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:11:46,133 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:11:46,133 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:11:46,133 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:11:46,134 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:11:46,134 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:11:46,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:11:46,135 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:11:46,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:11:46,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:11:46,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:11:46,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:11:46,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:11:46,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:11:46,136 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:11:46,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:11:46,137 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:11:46,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:11:46,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:11:46,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:11:46,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:11:46,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:11:46,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:11:46,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:11:46,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:11:46,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:11:46,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:11:46,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:11:46,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:11:46,139 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d5c55d9a4a2ded389ff7ce077afdc88fb2d2855921e5fd1e3b93fbba7e140e8 [2021-11-21 00:11:46,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:11:46,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:11:46,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:11:46,402 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:11:46,402 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:11:46,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2021-11-21 00:11:46,458 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/data/c102627ee/f9f4a349f96548cda14c127b860a963a/FLAG6038e264b [2021-11-21 00:11:46,976 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:11:46,977 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2021-11-21 00:11:46,988 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/data/c102627ee/f9f4a349f96548cda14c127b860a963a/FLAG6038e264b [2021-11-21 00:11:47,295 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/data/c102627ee/f9f4a349f96548cda14c127b860a963a [2021-11-21 00:11:47,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:11:47,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:11:47,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:11:47,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:11:47,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:11:47,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ef3558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47, skipping insertion in model container [2021-11-21 00:11:47,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:11:47,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:11:47,740 WARN L230 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_51e0536a-92c0-4dbd-9599-3bbf161ed76e/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2021-11-21 00:11:47,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:11:47,750 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:11:47,791 WARN L230 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_51e0536a-92c0-4dbd-9599-3bbf161ed76e/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2021-11-21 00:11:47,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:11:47,828 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:11:47,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47 WrapperNode [2021-11-21 00:11:47,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:11:47,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:11:47,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:11:47,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:11:47,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,907 INFO L137 Inliner]: procedures = 126, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2021-11-21 00:11:47,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:11:47,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:11:47,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:11:47,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:11:47,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:11:47,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:11:47,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:11:47,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:11:47,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (1/1) ... [2021-11-21 00:11:47,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:11:48,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:48,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:11:48,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:11:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-21 00:11:48,078 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-21 00:11:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:11:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:11:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:11:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:11:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:11:48,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:11:48,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:11:48,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:11:48,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:11:48,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:11:48,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:11:48,238 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:11:48,240 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:11:48,318 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-21 00:11:48,501 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:11:48,563 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:11:48,566 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:11:48,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:11:48 BoogieIcfgContainer [2021-11-21 00:11:48,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:11:48,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:11:48,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:11:48,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:11:48,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:11:47" (1/3) ... [2021-11-21 00:11:48,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103851a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:11:48, skipping insertion in model container [2021-11-21 00:11:48,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:11:47" (2/3) ... [2021-11-21 00:11:48,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103851a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:11:48, skipping insertion in model container [2021-11-21 00:11:48,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:11:48" (3/3) ... [2021-11-21 00:11:48,579 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2021-11-21 00:11:48,591 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:11:48,591 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:11:48,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:11:48,654 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:11:48,654 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:11:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:48,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:11:48,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:48,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:11:48,675 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:48,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash 111835896, now seen corresponding path program 1 times [2021-11-21 00:11:48,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:48,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203232376] [2021-11-21 00:11:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:48,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:11:48,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203232376] [2021-11-21 00:11:48,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203232376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:11:48,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:11:48,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:11:48,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074340796] [2021-11-21 00:11:48,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:11:48,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:11:48,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:48,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:11:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:11:48,919 INFO L87 Difference]: Start difference. First operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:48,989 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2021-11-21 00:11:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:11:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 00:11:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:48,997 INFO L225 Difference]: With dead ends: 33 [2021-11-21 00:11:48,998 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 00:11:49,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:11:49,005 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:49,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:11:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 00:11:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-11-21 00:11:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-21 00:11:49,037 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2021-11-21 00:11:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:49,037 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-21 00:11:49,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-21 00:11:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:11:49,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:49,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:49,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:11:49,040 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1529706086, now seen corresponding path program 1 times [2021-11-21 00:11:49,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:49,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35933847] [2021-11-21 00:11:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:49,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:11:49,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:49,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35933847] [2021-11-21 00:11:49,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35933847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:11:49,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:11:49,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:11:49,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676325151] [2021-11-21 00:11:49,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:11:49,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:11:49,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:49,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:11:49,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:11:49,123 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:49,167 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-11-21 00:11:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:11:49,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:11:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:49,171 INFO L225 Difference]: With dead ends: 23 [2021-11-21 00:11:49,171 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 00:11:49,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:11:49,173 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:49,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:11:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 00:11:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2021-11-21 00:11:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-21 00:11:49,179 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2021-11-21 00:11:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:49,180 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-21 00:11:49,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-21 00:11:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:11:49,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:49,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:49,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:11:49,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash 529419845, now seen corresponding path program 1 times [2021-11-21 00:11:49,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:49,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437018339] [2021-11-21 00:11:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:49,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:11:49,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:49,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437018339] [2021-11-21 00:11:49,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437018339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:11:49,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017476271] [2021-11-21 00:11:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:49,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:49,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:49,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:49,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:11:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:49,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:11:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:11:49,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:11:49,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017476271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:49,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516651628] [2021-11-21 00:11:49,521 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:11:49,521 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:11:49,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:11:49,531 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:11:49,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:11:49,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:49,688 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:11:49,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 00:11:49,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:49,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:11:49,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:49,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:49,856 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-21 00:11:49,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2021-11-21 00:11:49,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:49,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:49,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:49,992 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:11:49,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:11:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:11:50,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:11:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-21 00:11:50,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:50,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:11:50,753 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-21 00:11:50,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 262 treesize of output 286 [2021-11-21 00:11:50,841 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-21 00:11:50,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 279 treesize of output 288 [2021-11-21 00:11:52,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,629 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-21 00:11:52,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 418 treesize of output 404 [2021-11-21 00:11:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,661 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:11:52,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 403 treesize of output 388 [2021-11-21 00:11:52,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:11:52,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 375 [2021-11-21 00:11:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:52,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:52,837 INFO L354 Elim1Store]: treesize reduction 187, result has 17.6 percent of original size [2021-11-21 00:11:52,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 369 treesize of output 372 [2021-11-21 00:11:52,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:11:52,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 487 treesize of output 478 [2021-11-21 00:11:52,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:52,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:52,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:52,972 INFO L354 Elim1Store]: treesize reduction 301, result has 16.2 percent of original size [2021-11-21 00:11:52,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 472 treesize of output 475 [2021-11-21 00:11:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:53,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:53,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:53,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 47 [2021-11-21 00:11:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:53,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:53,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:53,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 29 [2021-11-21 00:11:54,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:54,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:54,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:54,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:54,371 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:11:54,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 108 [2021-11-21 00:11:54,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:54,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:54,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:54,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 29 [2021-11-21 00:11:55,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:55,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 68 [2021-11-21 00:11:55,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:11:55,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:11:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,118 INFO L354 Elim1Store]: treesize reduction 92, result has 24.6 percent of original size [2021-11-21 00:11:56,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 233 [2021-11-21 00:11:56,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,199 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-11-21 00:11:56,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 264 [2021-11-21 00:11:56,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 291 [2021-11-21 00:11:56,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 275 [2021-11-21 00:11:56,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 00:11:56,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 00:11:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 00:11:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:56,746 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:11:56,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 33 [2021-11-21 00:11:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:56,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 56 [2021-11-21 00:11:57,318 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-21 00:11:57,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 67 [2021-11-21 00:11:57,342 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-21 00:11:57,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 48 [2021-11-21 00:11:57,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-21 00:11:57,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:57,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:57,844 INFO L354 Elim1Store]: treesize reduction 81, result has 13.8 percent of original size [2021-11-21 00:11:57,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 93 [2021-11-21 00:11:57,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:57,870 INFO L354 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2021-11-21 00:11:57,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 74 [2021-11-21 00:11:57,897 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:11:57,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 60 [2021-11-21 00:11:57,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:58,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:58,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:58,631 INFO L354 Elim1Store]: treesize reduction 81, result has 13.8 percent of original size [2021-11-21 00:11:58,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 93 [2021-11-21 00:11:58,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:58,668 INFO L354 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2021-11-21 00:11:58,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 74 [2021-11-21 00:11:58,684 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:11:58,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 60 [2021-11-21 00:11:59,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:11:59,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:11:59,726 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:12:01,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:12:01,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:12:01,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-21 00:12:01,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626801875] [2021-11-21 00:12:01,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:12:01,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:12:01,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:12:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:12:01,023 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:01,071 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-21 00:12:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:12:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 00:12:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:01,072 INFO L225 Difference]: With dead ends: 28 [2021-11-21 00:12:01,073 INFO L226 Difference]: Without dead ends: 18 [2021-11-21 00:12:01,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:12:01,074 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:01,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:12:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-21 00:12:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-21 00:12:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-21 00:12:01,080 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-11-21 00:12:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:01,080 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-21 00:12:01,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-21 00:12:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:12:01,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:01,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:01,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:01,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:01,298 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash 26640179, now seen corresponding path program 2 times [2021-11-21 00:12:01,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:01,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106465771] [2021-11-21 00:12:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:01,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:12:01,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:01,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106465771] [2021-11-21 00:12:01,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106465771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:12:01,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:12:01,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:12:01,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298814459] [2021-11-21 00:12:01,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:12:01,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:12:01,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:01,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:12:01,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:12:01,384 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:01,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:01,495 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-21 00:12:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:12:01,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 00:12:01,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:01,496 INFO L225 Difference]: With dead ends: 27 [2021-11-21 00:12:01,496 INFO L226 Difference]: Without dead ends: 18 [2021-11-21 00:12:01,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:12:01,497 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:01,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:12:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-21 00:12:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-21 00:12:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-21 00:12:01,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-11-21 00:12:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:01,501 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-21 00:12:01,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-21 00:12:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 00:12:01,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:01,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:01,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:12:01,503 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash -143189158, now seen corresponding path program 1 times [2021-11-21 00:12:01,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:01,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185681702] [2021-11-21 00:12:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:01,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:12:01,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:01,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185681702] [2021-11-21 00:12:01,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185681702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:12:01,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218057308] [2021-11-21 00:12:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:01,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:01,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:01,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:01,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:12:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:12:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:12:01,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:12:01,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218057308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:01,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327590173] [2021-11-21 00:12:01,825 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:12:01,837 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:12:01,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:12:01,837 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:12:01,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:12:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:01,920 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:12:01,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-21 00:12:01,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:01,958 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:12:01,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 00:12:02,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,064 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-21 00:12:02,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2021-11-21 00:12:02,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,141 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:12:02,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:12:02,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:12:02,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:12:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-21 00:12:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:02,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:12:02,632 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-21 00:12:02,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 262 treesize of output 286 [2021-11-21 00:12:02,699 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-21 00:12:02,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 279 treesize of output 288 [2021-11-21 00:12:04,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,276 INFO L354 Elim1Store]: treesize reduction 106, result has 12.4 percent of original size [2021-11-21 00:12:04,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 426 treesize of output 412 [2021-11-21 00:12:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,404 INFO L354 Elim1Store]: treesize reduction 79, result has 8.1 percent of original size [2021-11-21 00:12:04,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 411 treesize of output 396 [2021-11-21 00:12:04,529 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-21 00:12:04,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 392 treesize of output 383 [2021-11-21 00:12:04,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,728 INFO L354 Elim1Store]: treesize reduction 353, result has 11.5 percent of original size [2021-11-21 00:12:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 377 treesize of output 382 [2021-11-21 00:12:04,792 INFO L354 Elim1Store]: treesize reduction 116, result has 21.1 percent of original size [2021-11-21 00:12:04,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 499 treesize of output 490 [2021-11-21 00:12:04,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,895 INFO L354 Elim1Store]: treesize reduction 509, result has 11.2 percent of original size [2021-11-21 00:12:04,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 484 treesize of output 489 [2021-11-21 00:12:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:04,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 340 treesize of output 292 [2021-11-21 00:12:05,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:05,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:05,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:05,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:05,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:05,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 53 [2021-11-21 00:12:06,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:06,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:06,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2021-11-21 00:12:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:06,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:06,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:06,787 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:12:06,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 94 treesize of output 37 [2021-11-21 00:12:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:07,081 INFO L354 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2021-11-21 00:12:07,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 206 treesize of output 108 [2021-11-21 00:12:07,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:07,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:12:07,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:07,840 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-21 00:12:07,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 229 [2021-11-21 00:12:07,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:07,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:07,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:07,922 INFO L354 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2021-11-21 00:12:07,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 264 [2021-11-21 00:12:07,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:07,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 291 [2021-11-21 00:12:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:07,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 275 [2021-11-21 00:12:08,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 00:12:08,143 WARN L220 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:12:08,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 00:12:08,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 54 [2021-11-21 00:12:08,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 53 [2021-11-21 00:12:08,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 00:12:08,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 41 [2021-11-21 00:12:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:08,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 56 [2021-11-21 00:12:10,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:12:10,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:10,210 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:12:10,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1327590173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:12:10,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:12:10,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 10 [2021-11-21 00:12:10,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142324043] [2021-11-21 00:12:10,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:12:10,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:12:10,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:12:10,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:12:10,644 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:10,729 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-21 00:12:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:12:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 00:12:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:10,730 INFO L225 Difference]: With dead ends: 33 [2021-11-21 00:12:10,731 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 00:12:10,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:12:10,733 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:10,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 13 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:12:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 00:12:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-11-21 00:12:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-21 00:12:10,740 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2021-11-21 00:12:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:10,741 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-21 00:12:10,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-21 00:12:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 00:12:10,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:10,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:10,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 00:12:10,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:10,943 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:10,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1198982187, now seen corresponding path program 1 times [2021-11-21 00:12:10,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:10,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915866971] [2021-11-21 00:12:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:10,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:12:11,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:11,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915866971] [2021-11-21 00:12:11,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915866971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:12:11,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623176884] [2021-11-21 00:12:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:11,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:11,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:11,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:11,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:12:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:12:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:12:11,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:12:11,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623176884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:11,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403393726] [2021-11-21 00:12:11,153 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:12:11,153 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:12:11,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:12:11,154 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:12:11,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:12:11,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,209 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:12:11,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 00:12:11,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:12:11,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,317 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-21 00:12:11,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2021-11-21 00:12:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,411 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:12:11,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:12:11,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-21 00:12:11,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:12:11,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:12:11,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:11,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:12:11,834 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-21 00:12:11,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 262 treesize of output 271 [2021-11-21 00:12:11,926 INFO L354 Elim1Store]: treesize reduction 132, result has 20.0 percent of original size [2021-11-21 00:12:11,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 284 [2021-11-21 00:12:12,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:12,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:12,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,114 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-21 00:12:13,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 418 treesize of output 404 [2021-11-21 00:12:13,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,146 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:12:13,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 403 treesize of output 388 [2021-11-21 00:12:13,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:12:13,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 375 [2021-11-21 00:12:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:13,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:13,278 INFO L354 Elim1Store]: treesize reduction 187, result has 17.6 percent of original size [2021-11-21 00:12:13,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 369 treesize of output 372 [2021-11-21 00:12:13,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:12:13,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 415 treesize of output 406 [2021-11-21 00:12:13,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:13,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:13,389 INFO L354 Elim1Store]: treesize reduction 247, result has 13.9 percent of original size [2021-11-21 00:12:13,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 400 treesize of output 403 [2021-11-21 00:12:13,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:13,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 254 [2021-11-21 00:12:14,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:14,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:14,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:14,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:14,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 47 [2021-11-21 00:12:14,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:14,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:14,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 32 [2021-11-21 00:12:15,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:15,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:15,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:15,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:15,034 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:12:15,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 122 treesize of output 55 [2021-11-21 00:12:15,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:15,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:15,403 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:12:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 34 [2021-11-21 00:12:15,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:12:15,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,154 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-21 00:12:16,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 229 [2021-11-21 00:12:16,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,232 INFO L354 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2021-11-21 00:12:16,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 264 [2021-11-21 00:12:16,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 291 [2021-11-21 00:12:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 275 [2021-11-21 00:12:16,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 00:12:16,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 00:12:16,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 00:12:16,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:16,762 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:12:16,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 48 [2021-11-21 00:12:16,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:16,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 34 [2021-11-21 00:12:18,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:18,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:18,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:12:18,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:19,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:19,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:12:19,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:19,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:21,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:12:21,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:21,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:21,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:24,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:24,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:12:24,468 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:12:26,070 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:12:26,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:12:26,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-11-21 00:12:26,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948437556] [2021-11-21 00:12:26,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:12:26,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:12:26,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:12:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:12:26,072 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:26,121 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-11-21 00:12:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:12:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-21 00:12:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:26,123 INFO L225 Difference]: With dead ends: 29 [2021-11-21 00:12:26,123 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 00:12:26,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:12:26,125 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:26,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:12:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 00:12:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-21 00:12:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-11-21 00:12:26,131 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 19 [2021-11-21 00:12:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:26,132 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-11-21 00:12:26,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-11-21 00:12:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 00:12:26,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:26,133 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:26,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:26,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:26,350 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:26,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1711763145, now seen corresponding path program 2 times [2021-11-21 00:12:26,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:26,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523545285] [2021-11-21 00:12:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:26,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:12:26,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:26,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523545285] [2021-11-21 00:12:26,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523545285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:12:26,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023744329] [2021-11-21 00:12:26,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:12:26,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:26,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:26,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:26,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:12:26,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:12:26,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:12:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 00:12:26,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:26,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:12:26,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 57 [2021-11-21 00:12:26,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:12:26,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 44 [2021-11-21 00:12:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:12:26,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:12:26,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023744329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:12:26,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:12:26,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-11-21 00:12:26,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573501553] [2021-11-21 00:12:26,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:12:26,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:12:26,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:12:26,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:12:26,857 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:26,911 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-21 00:12:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:12:26,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-21 00:12:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:26,914 INFO L225 Difference]: With dead ends: 37 [2021-11-21 00:12:26,914 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 00:12:26,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:12:26,915 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:26,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-21 00:12:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 00:12:26,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-21 00:12:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-21 00:12:26,925 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2021-11-21 00:12:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:26,926 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-21 00:12:26,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-21 00:12:26,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:12:26,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:26,928 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 00:12:26,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:27,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:27,146 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1065062798, now seen corresponding path program 3 times [2021-11-21 00:12:27,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:27,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343394679] [2021-11-21 00:12:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:27,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:12:27,384 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:27,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343394679] [2021-11-21 00:12:27,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343394679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:12:27,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135418684] [2021-11-21 00:12:27,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:12:27,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:27,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:27,386 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:27,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:12:27,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:12:27,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:12:27,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-21 00:12:27,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:27,776 INFO L354 Elim1Store]: treesize reduction 90, result has 33.3 percent of original size [2021-11-21 00:12:27,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 131 [2021-11-21 00:12:27,797 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-11-21 00:12:27,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 160 treesize of output 106 [2021-11-21 00:12:28,770 INFO L354 Elim1Store]: treesize reduction 65, result has 30.1 percent of original size [2021-11-21 00:12:28,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 104 [2021-11-21 00:12:28,785 INFO L354 Elim1Store]: treesize reduction 72, result has 4.0 percent of original size [2021-11-21 00:12:28,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 64 [2021-11-21 00:12:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:12:28,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:12:29,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135418684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:29,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314154352] [2021-11-21 00:12:29,360 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:12:29,361 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:12:29,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:12:29,362 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:12:29,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:12:29,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,404 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:12:29,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-21 00:12:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,453 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:12:29,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 00:12:29,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,520 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-21 00:12:29,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2021-11-21 00:12:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,566 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:12:29,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:12:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-21 00:12:29,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:12:29,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:12:29,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:29,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:12:30,017 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-21 00:12:30,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 262 treesize of output 286 [2021-11-21 00:12:30,066 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-21 00:12:30,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 279 treesize of output 288 [2021-11-21 00:12:31,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,236 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-21 00:12:31,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 418 treesize of output 404 [2021-11-21 00:12:31,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,264 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:12:31,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 403 treesize of output 388 [2021-11-21 00:12:31,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:12:31,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 375 [2021-11-21 00:12:31,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:12:31,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 369 treesize of output 360 [2021-11-21 00:12:31,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:31,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:31,399 INFO L354 Elim1Store]: treesize reduction 187, result has 17.6 percent of original size [2021-11-21 00:12:31,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 354 treesize of output 357 [2021-11-21 00:12:31,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:31,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:31,485 INFO L354 Elim1Store]: treesize reduction 301, result has 16.2 percent of original size [2021-11-21 00:12:31,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 472 treesize of output 475 [2021-11-21 00:12:31,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:31,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 254 [2021-11-21 00:12:32,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 47 [2021-11-21 00:12:32,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 29 [2021-11-21 00:12:32,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:32,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:32,902 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:12:32,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 29 [2021-11-21 00:12:33,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 68 [2021-11-21 00:12:33,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:12:33,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:33,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,967 INFO L354 Elim1Store]: treesize reduction 92, result has 24.6 percent of original size [2021-11-21 00:12:33,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 233 [2021-11-21 00:12:34,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,070 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-11-21 00:12:34,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 264 [2021-11-21 00:12:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 291 [2021-11-21 00:12:34,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 275 [2021-11-21 00:12:34,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 00:12:34,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 00:12:34,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 00:12:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:34,502 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:12:34,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 33 [2021-11-21 00:12:34,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:34,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 56 [2021-11-21 00:12:35,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:35,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:12:35,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:35,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:37,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:12:37,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:37,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:37,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:38,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:38,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:12:38,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:38,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:41,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:12:41,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:42,083 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:12:43,973 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:12:43,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:12:43,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 33 [2021-11-21 00:12:43,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127406344] [2021-11-21 00:12:43,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:12:43,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 00:12:43,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 00:12:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:12:43,976 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:50,007 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-11-21 00:12:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 00:12:50,008 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-21 00:12:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:50,009 INFO L225 Difference]: With dead ends: 58 [2021-11-21 00:12:50,009 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 00:12:50,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=440, Invalid=3720, Unknown=0, NotChecked=0, Total=4160 [2021-11-21 00:12:50,012 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 77 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:50,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 369 Invalid, 0 Unknown, 46 Unchecked, 0.6s Time] [2021-11-21 00:12:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 00:12:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-21 00:12:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-21 00:12:50,020 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-11-21 00:12:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:50,021 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-21 00:12:50,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-21 00:12:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 00:12:50,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:50,022 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 00:12:50,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 00:12:50,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:50,250 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:50,251 INFO L85 PathProgramCache]: Analyzing trace with hash -962580179, now seen corresponding path program 4 times [2021-11-21 00:12:50,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:50,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577412166] [2021-11-21 00:12:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:50,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:12:50,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:50,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577412166] [2021-11-21 00:12:50,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577412166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:12:50,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259367440] [2021-11-21 00:12:50,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:12:50,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:50,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:50,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:50,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e0536a-92c0-4dbd-9599-3bbf161ed76e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:12:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-21 00:12:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:50,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:12:50,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-21 00:12:50,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-21 00:12:50,965 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:12:50,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:12:51,095 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-21 00:12:51,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 132 [2021-11-21 00:12:51,119 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-21 00:12:51,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 98 [2021-11-21 00:12:51,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 91 [2021-11-21 00:12:51,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:51,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:51,591 INFO L354 Elim1Store]: treesize reduction 107, result has 9.3 percent of original size [2021-11-21 00:12:51,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 166 treesize of output 82 [2021-11-21 00:12:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:12:51,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:55,423 INFO L354 Elim1Store]: treesize reduction 126, result has 32.6 percent of original size [2021-11-21 00:12:55,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 1203 treesize of output 1208 [2021-11-21 00:12:56,238 INFO L354 Elim1Store]: treesize reduction 114, result has 39.0 percent of original size [2021-11-21 00:12:56,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 1208 treesize of output 1225 [2021-11-21 00:12:56,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:56,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-21 00:12:57,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:57,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-21 00:12:58,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:58,096 INFO L354 Elim1Store]: treesize reduction 9, result has 71.0 percent of original size [2021-11-21 00:12:58,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 56 [2021-11-21 00:12:58,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:58,265 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-11-21 00:12:58,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:19:45,065 WARN L227 SmtUtils]: Spent 6.77m on a formula simplification. DAG size of input: 4789 DAG size of output: 1445 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:19:45,081 INFO L354 Elim1Store]: treesize reduction 116910, result has 16.5 percent of original size [2021-11-21 00:19:45,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 49 select indices, 49 select index equivalence classes, 3 disjoint index pairs (out of 1176 index pairs), introduced 62 new quantified variables, introduced 1228 case distinctions, treesize of input 1412005049 treesize of output 1320364757